Fab-Form Industries
Fast-Tube™ Installation
updated
Fast-Tube is a cost effective method to form these concrete columns.
They used rolling scaffolding to build the ICF walls. And then installed our Zont bracing system to straighten and provide a walkway.
The concrete was placed over three separate days to achieve the heights required, and to build the walls off of the floor system.
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Pound for Pound Forming and Framing run through their first project using Fastfoot to form concrete footings.
This residential project, located up in the mountains of Whistler, BC had over 600' of footing 24" x 10". Large elevation changes required over 30 steps in the footing. Which were formed with just 7 rolls and 28 corners of Fastfoot 62".
Footings were supposed to be 10" in depth. With the excavation out 6-7", Fastfoot made adjusting the footing depth incredibly easy.
Tim averaged about 1 hour to form these steps with Fastfoot. If using plywood and threaded rod, Tim believes it would have taken many more hours per step to form.
Fastfoot also protects the lumber from concrete splash. This means a large amount of the lumber will be reused in the framing of the house later on.
Fastfoot also prevents ground moisture from wicking up into the home through the footing. This is a very inexpensive insurance to prevent mold and mildew in the basement. Click HERE for more information on rising damp.
Finishing the concrete footing is much easier with Fastfoot as the concrete slump can be 6" instead of the traditional 4" slump used with dimensional lumber to prevent leakage between the lumber and uneven ground.
Dasco Constructions; instagram.com/dasco_construction/?hl=en first time installing and pouring Fastfoot.
Made of high density polyethylene fabric, Fastfoot® is a green replacement of lumber and plywood for forming concrete footings.
A 100' roll of Fastfoot® forms the same concrete as 1,500 pounds of lumber.
Fastfoot® is now printed in three colors for easy reference of footing width lines and QR codes for onsite reference to the installation quide.
Nominated in 2010 and 2012 as the Contractors' Choice product of the year. Click on image to visit Concrete Contractor website.
Fastfoot® is ideal for residential and commercial strip footings and pad edging.
The Zeveler bracket is ideal for levelling up the ICF wall on top of a footing that is out of level.
Pairs of Zevelers are installed 8' on center around the perimeter of the bottom two levels of Insulated Concrete Form blocks and adjusted to level the wall perfectly. The space between the bottom of the ICF wall and the footing is then filled in with ICF non-expansive foam.
The 6mm driver has a socket head which allows it to pivot as the driver turns. This allows easy adjustment with an electric drill.
The bottom of the Zeveler has a high strength PE head which provides a point contact with the concrete footing. This prevents the base of the threaded rod from 'walking' on the footing.
Alair Homes in Chilliwack, British Columbia uses Fastfoot® for the first time. They are able to form all of the footings for this home just with 2x4"s. Which will be reused in the framing of the house.
Fastfoot also acts as a dampproof membrane. Preventing moisture from entering the home through the footing.
Send us an email or give us a call anytime
info@fab-form.com (888)303-3278
Made of high density polyethylene fabric, Fastfoot® is a green replacement of lumber and plywood for forming concrete footings.
A 100' roll of Fastfoot® forms the same concrete as 1,500 pounds of lumber.
Fastfoot® is now printed in three colors for easy reference of footing width lines and QR codes for onsite reference to the installation quide.
Nominated in 2010 and 2012 as the Contractors' Choice product of the year. Click on image to visit Concrete Contractor website.
Fastfoot® is ideal for residential and commercial strip footings and pad edging.
With rising lumber prices, see how Fastfoot saves thousands of dollars on this large residential project.
There are over 500' of concrete footings on this project. The builder was able to save time and money forming all of them with just 2x4's, instead of purchasing expensive 2x12"s.
Moving 1/4 the amount of lumber around site drastically reduces the labor needed onsite. Keeping everyone happy.
Fastfoot will also act as a cappillary break. Prevent water entering the home through the footing.
Timmy Sprague with Pound for Pound Construction let us film the installation of an ICF Monopour for two days. You can see the entire construction process using Fastfoot, Monopour Side Supports, and Zont ICF Bracing.
The ICF Monopour works with all horizontal Insulated Concrete Form. And creates a strong foundation as there is no cold joint between the footing and wall.
Costs are reduced as the concrete truck only has to come to site once. And the price of Fastfoot and Monopour Side Supports is roughly the same price as a lumber footing, with no stripping and disposal fees.
The ICF Monopour system is not for every builder, and not for every projects.
Feel free to send us your plans; info@fab-form.com (888)303-3278
The Zeveler bracket is ideal for leveling up the Insulated Concrete Form wall on top of a footing that is out of level.
Pairs of Zevelers are installed 8' on center around the perimeter of the bottom two levels of ICF blocks and adjusted to level the wall perfectly. The space between the bottom of the ICF wall and the footing is then filled in with ICF non-expansive foam.
This is a simple solution to increase speed an efficiency on the jobsite.
Fast-Tube™ is a utility fabric column form for forming round concrete columns. Manufactured from high strength polyethylene, Fast-Tube™ comes on rolls 100' in length for diameters from 8" to 12" (in 2" multiples) and 50' lengths for diameters 14" to 20". Installation, pouring and stripping is quick and easy.
Fast-Tube is manufactured from a woven high density PE. Minor tension differences in the fabric scrim can lead to slight twisting and wrinkles.
Sustainable Advantages
Economic, see spreadsheet below
No waste: cut any length from 100' roll
Ships flat, 1% the space of cardboard tubes
Light weight, 10% the weight of cardboard tubes
Strips in seconds
Recycle as under slab membrane
Undamaged by rain and moisture
A 100' roll of Fastfoot® forms the same concrete as 1,500 pounds of lumber.
Fastfoot® is now printed in three colors for easy reference of footing width lines and QR codes for onsite reference to the installation quide.
Nominated in 2010 and 2012 as the Contractors' Choice product of the year. Click on image to visit Concrete Contractor website.
Fastfoot® is ideal for residential and commercial strip footings and pad edging.
The Zont bracing system now has a galvanised steel tote that is nearly indestructible. This replaces plastic totes that always crack and break. There are two sizes, the Zote and Lo Zote. Both sizes are inter-stackable with four drain holes to prevent water accumulation. Both have solid steel handles for easy lifting, and are zinc plated to prevent corrosion. The Zote holds 20 Zonts, and the Lo Zote holds 10 Zuckles, which is exactly half the height of the Zote for easy stacking on pallets
Calvin Vader, principal of TruFrame, recently used Fastfoot for the first time in Battle Ground, WA.
Most of the grade beam is 32" in height, formed with a 2x6 top rail and two 2x4s between the top rail and the ground. The contractor used Fastfoot 50" and 74".
As the top of the framework is the top of the grade beam, screeding the concrete to the correct level is a breeze. As well, the positioning of steel templates for the anchor bolts is very easy to achieve. The contractor has suspended the 1/4" steel template using two 2x4s supported by the top rail.
The contractor supported the rebar hooks by tying with rebar wire to a 2x4 supported by another 2x4 running between the two side rails. This made it easy to finish the concrete.
This point load pad measuring 8' x 8' x 2' is formed with a simple framework - just two 2x4 rails: one at the top and one 2/3rds of the way down. The hydraulic loads from the bottom of the pad are taken with Fastfoot - this means the lateral loads on the forms are considerably less than when using plywood.
This point load pad measuring 8' x 8' x 2-8:' is formed with a simple framework - just three 2x4 rails: one at the top, one half way down and one abut 8" off the ground. The hydraulic loads from the bottom of the pad are taken with Fastfoot - this means the lateral loads on the forms are considerably less than when using plywood. The first lift of 16" of concrete is just been vibrated.
Running utilities through the formwork can not be simpler - use a utility knife to cut a hole in Fastfoot and run the pipe through. Try that with plywood.
Screeding the concrete is complete. Notice how simple the lateral bracing is - a few 2x4s to the ground suffices. Also the 2x4 cleats take lateral loads as well. None of this is possible with plywood forms.
Michael Upward, owner and principal, moved to Canada from New Zealand. In 2002 he created Upward Construction & Renovation and for the last sixteen years he has been building on the North Shore, from large renovations to new custom homes.
Upward's project was an interesting combination of 23 1/2' high ICF foundation walls along with 14" pilasters required by the structural engineer QQXM Engineering Ltd.
Vancouver ICF takes the 2D drawings of the architect and generates a 3D view of the foundation so that the builder can easily visualize the blocks that are being supplied. As can be seen, one of the walls on the north side had a 23.5' high wall. The first pour was 14.5', then the suspended slab was poured, followed by a pour of the remaining 10' wall.
John's crew did an excellent job on the footings, using a laser for setup and pouring the concrete. Accuracy was less than one quarter of an inch.
Two or three courses of Nudura have now been laid out on the footings and glued into position. Notice (on the left side) how John has rented scaffolding to enable the construction of a ramp into the site. As materials are delivered from the north side, this was a cost effective measure to lower the cost of moving manpower and materials.
Brian Ralph with KLS Homes is a home builder in Maple Ridge, BC. This is his third ICF foundation which was installed by SED Construction Ltd.
Construction of the walls began at 7:30 AM. By the end of the day the foundation, including bracing, was substantially complete. The site was open to the public to watch the installation and ask questions. Attendees discussing the use of Fastfoot for forming the footings and the importance of working off a level footing. Installing the third layer of ICF. As each Nudura block is 12 square feet, installation is very quick. Installation of the fourth course of Nudura ICF. At this point, Zont brackets are attached to the wall 5' on centre. Two layers of Zont brackets installed around the perimeter. Windows have begun taking shape. Walers are first installed into the cavity of the Zont bracket. Vertical strongbacks to follow shortly. At the end of the day the foundation is built to height and braced. The following day window bucks will be installed, and walls will be straightened prior to the concrete pour.
The ZEE bracket revolutionizes the way you build T-junctions. No need to purchase bulky T-blocks from your dealer. Quickly make your own T-junctions on site using standard blocks and ZEE brackets. And eliminate two marriage lines at each T-junction.
ZEEs eliminate the cost of storing and shipping bulky T-blocks.
Each ZEE weighs just 2.9 pounds and is easy to install using 1-1/2" x #8 deck screws. They work with all ICFs that have the ties molded into the foam.
Forming T-junctions with ZEEs eliminates three marriage lines at each junction. As each marriage line takes approximately 40 minutes to cut, reinforce with 1x4s and strip, that's a lot of wasted labour. In the photo below, no marriage lines were required using ZEEs.
As each marriage line requires cutting the ICF block on each side of the line, this leads to excessive ICF waste.
Offset corners are always a challenge to brace. ZEEs allow you to do this quickly without having to rip down plywood and waste dimensional lumber. As ZEEs can be reused many times, their effective cost is minimal.
ICF T-blocks are extremely bulky and take up a lot of site space. Eliminate T-blocks and save space with ZEEs.
By eliminating bulky T-blocks your delivery costs will be reduced significantly.
ICF T-junctions take up too much warehouse space. Eliminate T-junctions and save space for faster moving products.
Stocking 4", 6", 8" 10" and 12" T-junctions is problematic as they are very prone to damage. ZEEs eliminate the need for these SKUs.
Helix® is a short twisted steel 'micro bar' used as a structural replacement for conventional steel reinforcing. Helix® is much more than a fiber used for crack control. Due to its unique shape and resulting behavior, Helix® can replace 50 to 100% of traditional steel reinforcing, while improving the shear strength and durability of concrete.
The secret of Helix® is the TWISTED square profile. Similar to a cork screw in a wine bottle stopper, the only way Helix® can be removed from the concrete is for it to be twisted out. The energy required to untwist Helix® matches very closely to the energy required to pull deformed rebar through concrete.
This sets Helix® apart from other fibers which rely solely on friction to resist pull-out. And it is this 'twisting' behaviour which allows Helix® to replace conventional steel reinforcement in a wide range of applications.
A 'medium' dosage of Helix® is about 15 pounds per cubic yard which means 170,000 micro bars dispersed throughout the concrete. That's a lot of 'untwisting' tensile strength which typically provides equivalent bending moment capacity, higher shear strength and better durability than conventional reinforcing.
Helix® was invented in the 1990s at the Department of Engineering at the University of Michigan. One of the original researchers, Luke Pinkerton P Eng., went on to establish Polytorx, LLC which introduced Helix® into the market in 2003.
Since then over 13 million pounds of Helix® have been produced, the equivalent of 20,000 full height residential foundations.
Ram Construction of Surrey, BC recently completed the foundations, slabs and tilt walls for Fedex's Western Canada Distribution Center.
Ram Construction Inc., started in 1986 by current President Steve Knoblauch, has a long and successful history of building retail, commercial and institutional buidings in Greater Vancouver, the Fraser Valley, Squamish, the Interior of BC and Vancouver Island.
Workers used 1x4 stakes, 48" on center, with a 2x4 screed board for the top of the footing. Grade beam depth was 16 to 20" in height.
A laser was used to measure the grade beam height on each stake. Three 2" duplex nails attached each stake to the screed board.
Fastfoot® was quickly unrolled between the screed boards. This single roll of Fastfoot®, weighing just 14 pounds, replaced 900 pounds of 2x12.
Fastfoot® was attached to the screed board using a hammer tacker with 3/8" staples. Spacing was about 4 to 6" on center.
Cleats were attached in line with each pair of stakes to ensure the fabric tension would not torque the screed board off the stake.
As the grade beam is bridging between load bearing caissons, there were two levels of footing steel with stirrups 12" on center. Steel projecting above the grade beam will be embedded in a 5' retaining wall above used to support the dock levelers.
8" and 10" diameter steel caissons were located 15 to 18' on center to support building loads.
Fastfoot® was easily slit with a utility knife over each caisson.
The Zont Twist™ locks the 2x4 walers and strongbacks against the ICF wall to flatten the wall horizontally and vertically.
The plastic cam is twisted counterclockwise to quickly lock the lumber, reducing the installation time by one half. The cam is designed so that any wall settlement will tighten the lumber against the wall.
Finally. A wall aligner specifically designed for ICF walls. Only 3.6 pounds, just half the weight of conventional turnbuckles. And fast adjustment with an electric drill.
The ZAT bracket is the quickest way to provide a catwalk for your foundation. ZAT collapses for easy transportation.
HoriZONTal walers are the first contact with the wall, straightening first in the horizontal direction.
Compare this with conventional vertical braces where the first contact is vertical, leading to a wavy horizontal alignment.
Zont™ bracing is approximately 10% the cost of vertical bracing.
Why rent conventional braces when you can buy for the same price?
Zont™ waler brackets and Zuckle™ wall aligners weight 11% the weight of conventional vertical bracing.
Jeff Langford with JDL Homes Vancouver, discusses why they use Fastfoot on every footing. Fastfoot® prevents ground moisture from wicking up into the concrete footing for the life of the building. This is a very inexpensive insurance to prevent mold and mildew in the basement. JDL Homes uses Nudura's Peel & Stick membrane to protect the wall against ground moisture. The membrane is then lapped over Fastfoot® to ensure that moisture cannot enter the foundation wall nor footing. JDL Homes uses a dimple membrane on the outside of the Peel & Stick to ensure water cannot build up on the outside of the wall. A grey breathable air barrier is placed above the Peel & Stick to allow the water vapour to escape during the curing process.
The Econ Group, a Design/Build Contractor in Vancouver BC, recently installed a Monopour foundation for a panelized single family dwelling on the West Side of Vancouver.
"We insisted on the Monopour for this project", confirmed Mike Dutson, a Partner with Econ. "We needed a foundation wall accuracy of 1/8" because all the floors, walls and roof were pre-manufactured. We achieved these tolerances easily using the drill adjustible side supports and Zont™ bracing."
The project architect was Kenneth Chooi of DSK Architecture, Vancouver BC (604.448.2102). DSK Architecture specializes in sustainable and energy efficient design for the residential market.
Floor, wall and roof panels were supplied by CutMyTimber, Inc., with offices in Canada and the USA.
James Hinks is a home builder in Chilliwack, BC. This is his first ICF foundation which was installed by SED Construction Ltd.
Construction of the walls began at 8:00 AM. By the end of the day the foundation, including bracing, was substantially complete. The next day the concrete pour began at 1:00 PM, with the 45 meters being poured in three and one half hours.
The foundation has 271 lineal feet of wall, with a maximum wall height of 14'-3". Surface area of the walls is 2,352 square feet including 15 corners and numerous openings.
Zont bracing was used to align the Nudura ICF walls
In the past, plywood forms have had a cost advantage over insulated concrete forms as plywood provided no insulation value.
However in the 21st century, with higher energy costs, increasing global temperatures and CO2 emissions, the media and public became concerned with climate change. By 2015 the City of Vancouver changed the building code, requiring all foundations to have an effective thermal performance of R22. This meant that if a contractor formed his foundation with plywood, he must now build an insulated 2x6 stud wall on the inside of his foundation to achieve the required thermal performance.
Helix clumping will NEVER occur if the following procedure is rigorously followed:
Add a minimum of 6% of the mix water (more water is better) into the drum, with the drum turning at charging speed;
Dump all of the Helix® into the drum in one go, no need to slowly shake;
Rotate the drum at charging speed for six minutes (as the clumps fall over the mixing fins they are broken up into 2D layers, with the water acting as a lubricant).
Add the sand, aggregate and cement in the normal manner;
Mix an additional 6 minutes in the truck drum to ensure the Helix is completely disbursed.
An ICF Monopour foundation was recently poured in White Rock by Vern Perry of Oceano Construction for owner/builder Brian Evans. In the video above Brian discusses the merits of Nudura® and the ICF Monopour System.
The excavation was dug on three levels: the full basement is closest, a secondary level and finally the crawl space level. Height difference was 7'-3" between the three levels. Notice that the builder has installed a drainage layer on the surface of each elevation to prevent water buildup behind the footings and to eliminate water wicking up into the footings.
The batter boards to align the MP panels can be seen on each corner. The first delivery was the panels for the full height foundation.
The use of Helix® micro rebar in the concrete means the ready mix company now supplies and installs the steel reinforcing. This has allowed Fab-Form to change the size and shape of the ICF panels to maximize the speed and efficiency of the contractor.
Greg Hanberry, Director of Cirrus Homes, a green home builder for 28 years, discusses his experience with the Fab-Form Monopour System in the video above.
Pouring concrete footings with Fastfoot just got faster.
Sewn corners are installed in seconds. No need to fold and cut - just drop in place and staple.
Corners are cut and sewn by reversing the pattern so that there is NO production waste.
The lineal cost of the corner is the SAME as the lineal cost of the Fastfoot® roll.
Corner seams are double stitched, so no danger of blowout.
Innovative building techniques are applied on every building and we strive to be progressive in many different aspects. On this project, we applied the Fab-Form ICF Mono-pour
Zont bracing is a light weight, cost effective method of flattening an Insulated Concrete Form wall using site available 2x4s. It consists of three components:
Zont™ Waler Brackets: hold horizontal 2x4 walers and vertical 2x4 strongbacks solidly against the ICF wall;
Zuckle™ Wall Aligners: plumb the strongbacks to align the wall to the stringline;
2x4 Walers & Strongbacks: held in the Zont™ bracket and flatten the wall;
Advantages
Straighter walls: Horizontal walers are the first contact with the wall, straightening first in the horizontal direction. Compare this with conventional vertical braces where the first contact is vertical, leading to a wavy horizontal alignment.
Economic: Zont™ bracing is approximately 10% the cost of vertical bracing;
Fast: a 'twist' of the wrist quickly locks the horizontal waler and vertical strongback in position.
Lightweight: Zont™ waler brackets and Zuckle™ wall aligners weight approximately 10% the weight of conventional vertical bracing. Use 5 gallon buckets to carry into the jobsite;
Height Adaptable: brace stem walls or tall walls on same job, just add another row of Zonts™ and another 2x4 waler;
Buck Adaptable: window and end of wall bucks are easily reinforced as there is no vertical brace in the way;
Green: use site available 2x4s, save on delivery and storage costs;
Easily to transport: 12 Zont™ braces fit in a 5 gallon bucket - try that with 12 conventional braces.
This method is ideal for ready mix companies as a box of Helix® is disbursed in only 50 seconds.
For additional information on purchasing the table, please contact Rick at (604)596-3278.
This 15,000 square foot shopping centre in Surrey, BC used Fastfoot® for their strip footings. The structure above was all wood frame.
The contractor uses a hammer tacker to staple Fastfoot to the screed boards about 8" on center.
A 2' plywood formed stem wall will be placed on top of the footing to support the wood frame structure above.
The Engineer required two horizontal 15M bars in the footing, with 15M hooks 16" on centre.
Fab-Form is now the exclusive distributor of Helix® Micro Rebar in BC as well as its customers across North America.
A slab was recently poured and placed for 'The Valkyries' townhouse project located in Squamish, BC.
Helix® was added to the concrete at the ready mix plant of Cardinal Concrete Ltd., Squamish, BC.
A forklift was used to lift the Helix® and employee to shake the fiber into the hopper.
9 pounds of Helix were added to each cubic yard of concrete (5.3 Kg/m3).
This is approximately 11,330 fibers per cubic yard, providing shear strength and bending moment capacity in all directions.
Compare this to the specified wire mesh (6 x 6 w2.9-w2.9) which typically ends up on the bottom of the slab from the placers walking on it; providing no bending moment and minimal shear strength.
Helix® behaves like aggregate and does not come to the surface during the finishing process
Helix® had no impact on the polishing process. No fibers showed up on the slab after polishing.
RDC Fine Homes Ltd. recently poured BC's first foundation reinforced with Helix® micro rebar in the footing and stem wall. RDC, located in Whistler BC, specializes in custom homes and energy efficient 'Built Green®' technology.
The project, 'The Valkyries', located in Squamish, BC, consists of four, three story, three bedroom townhomes. The developer, Mario Gomes, is building to the 'Built Green® GOLD' standard with a minimum EnerGuide rating of 80.
Project Structural Engineer, Ken Louie, RKTG Associates Limited, Vancouver BC, determined that Helix®provided equivalent structural performance to conventional steel reinforcing while lowering the embodied energy by 30%.
Jamieson Merrit, President, Arbutus Point Developments Ltd., is a green custom home builder located in West Vancouver, BC.
He recently completed two foundations on an island in Howe Sound, BC. The foundations included all footings, 12 exterior rectangular columns, interior footings and skim coats. The work began Wednesday morning with the concrete pour Friday morning. The project was complicated by its remote location as all materials had to be barged in.
Naikoon Contracting Ltd., North Vancouver BC, recently formed and poured footings for one of Canada’s 'greenest' homes which hopes to achieve the highest LEED Platinum score in Canada as well as meet the new R-2000 certification for energy efficiency.
Joe Geluch, President, has been a green builder for 15 years and won numerous awards for his efforts.
Click on the image to the right to go to the Midori Uchi project page. Note the rammed earth walls on the front left corner of the home.
"We always use Fastfoot® on our footings", confirmed Joe, "the fabric prevents ground moisture entering the foundation as well as prevents concrete damage to our lumber."
In order to minimize lumber, Naikoon's crew used 2x4s for the screed boards.
The laser is used to ensure the top of the screed board is at the exact height for the ICF blocks.
Fastfoot® is 'folded' around corners so that ground moisture cannot enter the concrete.
A hammer tacker with 3/8" staples is used to fasten the fabric to the top of the 2x4 screed board.
The structural engineer required a 6' wide footing under the rammed each wall.
Naikoon's crew lays out two widths of Fastfoot® under the footing to protect against ground moisture.
Fastfoot® is a closed form, preventing the concrete from being contaminated by the ground. Concrete is very expensive, typically from $150 to $200 per cubic meter. Fastfoot® prevents concrete leakage and produces better quality concrete by preventing contamination.
Engineers require 3" clearance between the steel and the ground. With Fastfoot® this distance can be reduced to 1 1/2" thereby increasing the bending moment capacity of the footing as the tensile strength of the steel is directly proportional to the distance from the neutral axis.
Ram Construction of Surrey, BC recently completed the foundations, slabs and tilt walls for Fedex's Western Canada Distribution Center.
Ram Construction Inc., started in 1986 by current President Steve Knoblauch, has a long and successful history of building retail, commercial and institutional buidings.
Workers used 1x4 stakes, 48" on center, with a 2x4 screed board for the top of the footing. Grade beam depth was 16 to 20" in height.
A laser was used to measure the grade beam height on each stake. Three 2" duplex nails attached each stake to the screed board.
"We would have required a 2x12 plus a 2x4 to form this", said Chris Moncton, Site Supervisor. "With Fastfoot® we eliminated the 2x12 and the cost of moving and storing the concrete damaged lumber."
Fastfoot® was quickly unrolled between the screed boards. This single roll of Fastfoot®, weighing just 14 pounds, replaced 900 pounds of 2x12.
Fastfoot® was attached to the screed board using a hammer tacker with 3/8" staples. Spacing was about 4 to 6" on center.
"Worker safety is important", confirmed Chris Moncton. "Light weight fabric makes a lot of sense - why risk back injury from heavy lumber?"
Cleats were attached in line with each pair of stakes to ensure the fabric tension would not torque the screed board off the stake.
As the grade beam is bridging between load bearing caissons, there were two levels of footing steel with stirrups 12" on center. Steel projecting above the grade beam will be imbedded in a 5' retaining wall above used to support the dock levelers.
8" and 10" diameter steel caissons were located 15 to 18' on center to support building loads.
Fastfoot® was easily slit with a utility knife over each caisson.
Rising damp is the wicking of water through the footing, into the concrete wall, and its evaporation inside the building. Rising damp increases the moisture load which leads to dampness and mold.
Rising damp is prevented by isolating the concrete footing from ground moisture. While it is normal in the industry to protect the foundation wall from ground moisture with a damp proof membrane, no effort is made to protect the footing concrete. However most moisture is located at the bottom of the excavation, where the footings are located.
Rising damp does not produce pools of water (as with liquid water entering a concrete wall), but rather a chronic musty smell, growing insidiously stronger when the footing is exposed to more moisture.
The worst case of rising damp occurs when water ponding occurs at the footing level. This occurs over impervious soils where the excavation is inadequately sloped, the drain tiles are not located below the bottom of the footing, and no sub-footing drainage layer was installed.
Even without water ponding, rising damp occurs when unprotected footings are exposed to damp ground. 'Hygroscopic' concrete wicks ground moisture up into the foundation concrete which is then evaporated inside the building. Fastfoot® prevents this wicking from occurring, providing a drier and healthier indoor environment.
A 100' roll of Fastfoot® forms the same concrete as 1,500 pounds of lumber.
All new Fastfoot® 'XT' is now printed in three colors for easy reference of footing width lines and QR codes for onsite reference to the installation guide.
The weave has been increased form an 8x8 scrim to a 10x10 scrim, improving the staple holding power by 20%.
The high density polyethylene scrim is coated on both sides with a low density polyethylene. The coating thickness has been increased by 20% on each side to improve impermanence.
Accommodating different footing widths and depths is a breeze with the colored lines which are marked with the footing width dimension.
New distance lines, spaced 12" on center along the length, allow the installer to ensure both edges are aligned perpendicular to each other. This prevents lateral wrinkles due to misalignment of the edges.
QR codes take the installer immediately to the web-based installation guide. There is a separate QR code for residential and commercial footings.
There were two 1892 heritage homes located side by side on the 50' by 132' lot. To make the project financially viable, developers Dick Hellios and Karli Gillespie increased the densification to seven units: two in each heritage unit; one adjacent and behind each heritage unit; and one laneway unit on the south end.
This densification was not accomplished by demolishing and rebuilding from scratch, but rather by upgrading the heritage homes to reflect contemporary social and economic realities. New construction is highly energy efficient with an aesthetic that is derived from, but not imitative of the existing structures. This balances the energy inefficiencies of the heritage homes, while still preserving their cultural and ecological value for the community and surrounding neighbourhood.
A central complex housing green technologies such as solar hot water and heat pumps provide heat, water and services to each unit. The mechanical systems will allow easy connection to future district energy systems. An electric car-share program is proposed to reduce the transportation footprint of residents. Garden recycling and composting will reduce waste production of the seven units to less than that of the two heritage homes (text: Vancouver Heritage Foundation).
Project design was by Shape Architecture of Vancouver, BC. The project was designed for sustainability: the five new units are being built to EnerGuide 90+ and the two heritage units to very high levels of efficiency.
Josh Klein, project supervisor, Natural Balance Home Builders, explains:
"The lot width is only 50' wide, yet each Heritage building measures over 21', not including roof overhangs. To excavate for the new foundations and sunken utility room, we carefully slid each building to the south end to provide sufficient space for the backhoe to operate."
"Once the site was excavated to the two depths, we slid the buildings back to their original location, lifted them to a height where we could build the new insulated foundations underneath. Nickle Bros. did a great job with the moving and cribbing."
Pacific ICF Inc. is a Vancouver based contractor specializing in ICF construction. They have been building with ICFs and fabric formwork for 12 years. And have been a green contractor long before it became fashionable."
"We've owned several sets of 10' ICF bracing", said Michael. "But we got tired of lifting them in and out of the hole, and then finding a place to store them. We are definitely not keen on moving a ton of bracing to flatten a light weight ICF wall."
"When I heard about the Zont™ Bracing I was very interested."
Flatter Walls
The Zont™, Zuckle™ and angled kicker allow a top of wall accuracy of 1/8".
"We're impressed with the system", confirmed Michael. "The Zuckles™ quickly adjust with an electric drill to get a real flat wall."
Zonts™ & Zuckles™
Each Zont™ weighs one and one half pounds and the Zuckle™ about twice that much.
"Each 'brace' equivalent weighs about one tenth the weight of our old vertical braces. All the 2x4s are left on site to be incorporated into the build."
This efficiency leads to cost savings to the contractor and resource savings to the environment.
Placing Concrete
Concrete placement is no different with Zonts™ as with conventional ICF bracing. As the vertical strong backs are located 3 5/8" away from the ICF wall, there's plenty of room to install reinforcing around window and door openings.
Zont™ brackets can be located on each side of the openings to ensure perfect alignment.
"I'm sold on Zont™ bracing", confirmed Michael.
Dan is not an experienced machine operator, so the elevation differed about 5" from one side of the excavation to the other.
The forming contractor is Harold's Contracting of Abbotsford BC. Harold Esau and his crew quickly set up the screed boards using a laser level and 1x2 stakes 6 to 8' on center
Fastfoot® is adjusted to uneven grades using specially marked footing width lines and letting the fabric out in deeper sections.
Fastfoot® is stapled to the top of the screed boards using a hammer tacker with 3/8" staples.
Harold's team quickly got on to folding corners. They cut an 'inverted T' on the inside of the corner, folded the fabric 90 degrees and then continued in the new direction
The engineer specfied 16" diameter columns to support the artistic front porch.
"I like Fast-Tube™", confirmed Dan. "They're fast to cut, and easy to setup once you understand how to staple the alignment tab to the 2x4."
Fastfoot® prevents all concrete leakage and reduces concrete consumption.
Notice how the fabric prevents the concrete damage to the lumber.
Dan filled the column pads first, then filled the regular footings. Then he came back and filled the columns. This prevented the column concrete from leaking out the footing.
Abbotsford gets 60 inches of rain a year, so ground moisture is a major issue. Fastfoot® is a vapor barrier, preventing ground moisture from entering the concrete.
Harold's crew pulled Fastfoot® from the top of the screed boards and taped the edges together.
Logix® blocks will be placed on top the fabric to ensure it stays in position. Once the wall has been poured, a 12" width of Peel and Stick will overlap the Fastfoot® to ensure all staple holes are properly covered. Then the dimple membrane will run down the wall and over the top of the footing, providing complete protection to the bottom side and top of the footing.