Uploaded October 2025 | Updated September 2026, 1 week ago
Find out more about Pipelife:
👉 skill-builder.uk/pipelife
We’ve come a long way from copper and solder — here’s the smart, modern way to plumb a house that’s faster, safer, and built for the future.
__________________________
Roger heads back to the Pipelife Academy in Cork, Ireland, to meet Mike Geary and discuss how modern plastic pipe systems are changing plumbing for the better.
From flexible PEX to pre-insulated manifold systems, the days of worrying about joints under the floor or burst copper pipes are fast disappearing.
Mike explains how pipe-in-pipe systems make installation faster, cleaner, and easier to maintain, with the bonus that you can even rethread pipes through ducting if one ever gets damaged.
Roger and Mike also look at insulation—why it’s crucial for heat efficiency, how it affects flow and return losses, and why insulation delays freezing but doesn’t prevent it.
It’s a deep dive into the evolution of plumbing—from lead to copper to modern plastics—with real insight into how technology is helping the trade adapt to faster building schedules, higher comfort demands, and fewer apprentices entering the trade.
__________________________
Chapters
00:00 Introduction – Roger visits Pipelife in Cork
00:31 Why plastic pipes have a 50-year guarantee
01:27 Advantages of pipe-in-pipe
02:20 How re-threadable pipe-in-pipe systems work
03:10 Why insulation matters
07:29 Heat loss outside the thermal envelope
08:50 How insulation affects freezing risk
11:51 Skills shortage and faster building methods
15:12 Why modern homes need smarter plumbing
17:20 Wrap-up and how to learn more
Check out @pipelifes
==========================================
#homeimprovement #homeheating #plumbing
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==================================
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Find out more about Pipelife:
👉 skill-builder.uk/pipelife
We’ve come a long way from copper and solder — here’s the smart, modern way to plumb a house that’s faster, safer, and built for the future.
__________________________
Roger heads back to the Pipelife Academy in Cork, Ireland, to meet Mike Geary and discuss how modern plastic pipe systems are changing plumbing for the better.
From flexible PEX to pre-insulated manifold systems, the days of worrying about joints under the floor or burst copper pipes are fast disappearing.
Mike explains how pipe-in-pipe systems make installation faster, cleaner, and easier to maintain, with the bonus that you can even rethread pipes through ducting if one ever gets damaged.
Roger and Mike also look at insulation—why it’s crucial for heat efficiency, how it affects flow and return losses, and why insulation delays freezing but doesn’t prevent it.
It’s a deep dive into the evolution of plumbing—from lead to copper to modern plastics—with real insight into how technology is helping the trade adapt to faster building schedules, higher comfort demands, and fewer apprentices entering the trade.
__________________________
Chapters
00:00 Introduction – Roger visits Pipelife in Cork
00:31 Why plastic pipes have a 50-year guarantee
01:27 Advantages of pipe-in-pipe
02:20 How re-threadable pipe-in-pipe systems work
03:10 Why insulation matters
07:29 Heat loss outside the thermal envelope
08:50 How insulation affects freezing risk
11:51 Skills shortage and faster building methods
15:12 Why modern homes need smarter plumbing
17:20 Wrap-up and how to learn more
Check out @pipelifes
==========================================
#homeimprovement #homeheating #plumbing
👇 SUPPORT SB - BECOME A MEMBER
youtube.com/channel/UC9GdB6vG6m6cDAwrTAWXgyg/join
📪 JOIN OUR NEWSLETTER
skill-builder.uk/signup
🛒 SEE OUR FAVOURITES ON AMAZON
amazon.co.uk/shop/skillbuilder
🎧 LISTEN TO OUR PODCAST
blubrry.com/skillbuilder/subscribe
🎬 OUR VIDEO LIBRARY
youtube.com/@SkillBuilder/videos
🔗 SEE EVERYTHING SB ON LINKTREE
https://linktr.ee/skillbuilder
facebook.com/skillbuilderchannel
tiktok.com/@skillbuilder
instagram.com/skill_builder
(As an Amazon Associate, we earn from qualifying purchases)
==================================
OUR FAVOURITE CHARITIES
👷 BAND OF BUILDERS
bandofbuilders.org
⛯ THE LIGHTHOUSE CHARITY
lighthousecharity.org
💧 CHARITY WATER
charitywater.org










![The Damp Proofing Mistake That Makes Old Houses Worse
Damp in an old house is almost never one problem. Roger Bisby walks through a 1900s renovation near Nottingham to work out where it is really coming from.
The short answer is that most of the moisture here is coming up from the ground rather than in through the walls. There is no damp-proof membrane under the floors, the clay subsoil is holding water even after weeks of heat, and hard sand and cement render is trapping whatever does get in. The cure is ventilation, a proper membrane lapped up the wall, and belt-and-braces damp-proofing rather than tearing out a damp-proof course that is still doing its job.
AJ went to auction on this place, watched it fail to sell, and bought a house that had stood empty for years. He is turning it into a multigenerational home for himself, his wife and his parents, with the old garage block becoming a self-contained side for mum and dad. Stripping out the ground floor turned up rotten skirtings, crumbling fireplace surrounds and a mystery black coating on one of the floors that turns out to be a piece of local building history.
MENTIONED IN THIS EPISODE 👇
Dryrod DPC Damp Proofing Rods
https://go.skill-builder.uk/dryrods
Drybase TS-PLUS Tanking Slurry Kit
https://go.skill-builder.uk/drybase-ts-plus-kit
Drybase Flex Membrane
https://go.skill-builder.uk/flex-membrane
(Above are affiliate links. We earn a small commission at no extra cost to you.)
AJ on Instagram 👇
https://www.instagram.com/the.multigeno.reno
KEY TAKEAWAYS
• Dry rot draws moisture in from elsewhere with its roots, so cutting out the localised damage is not enough, whereas wet rot dies once you take the water away.
• If a house has an original slate or bitumen damp proof course, leave it alone. Drilling into it destroys it, so go above it or below it if you want to add chemical rods.
• Air bricks at the front only give you ventilation at the front. Without a matching route out the back you get no through flow under a suspended floor, and moisture just sits there.
• Clay subsoil holds water all year, which is why a floor with no damp proof membrane can still be visibly wet after a long dry spell.
• Strong sand and cement render with waterproofer in it does not solve damp, it just moves the problem into the wall and pushes the moisture somewhere else.
• Coal tar was used extensively as a damp-proof course and membrane material, and near an old colliery it is exactly what local builders would have had to hand.
• If you are fitting retrofit underfloor heating, get the drawings from the manufacturer and follow them to the letter. Ignoring them is where these jobs go wrong.
WATCH NEXT
https://youtu.be/irytqcJZSps
https://youtu.be/96WN8AtAvNg
CHAPTERS
00:00 A 1900s house being turned into a multigenerational home
00:45 Dry rot or wet rot, and how to tell the difference
01:09 Suspended floor, solid floor and missing air bricks
01:40 The survey findings and no DPM under the fireplaces
01:56 Retrofit underfloor heating: gas now, heat pump later
02:45 The original damp proof course and why you must not drill it
03:20 How chemical damp rods actually work
03:57 Internal wall insulation on the external walls
04:43 Digging out the floor: clay, tiles and no membrane
05:24 Building a new slab the right way
05:55 Boiler position and following the underfloor heating drawings
06:39 1980s inset fireplaces and where the chimney damp comes in
07:13 Wood burners and a lifetime supply of wood
07:37 Three phase supply, EV charging and a future heat pump
08:14 Rotten skirtings: wet rot and woodworm
08:47 A quick word about the statue
09:41 Auction, trees and the condition it was bought in
09:59 The mystery black coating on the floor
10:53 Sealing the floor and lapping it up the wall
11:41 Hard sand and cement over an old damp problem
13:25 Wrapped joists and moisture under the newer floor
14:11 Cutting a channel through for ventilation
15:38 The tar smell and what it tells us
16:44 Coal tar as a damp proof course
17:55 Converting the garages for the parents
18:33 The gardens, palm trees and fruit trees
20:01 Follow the renovation on Instagram [HANDLE NEEDED]
Renovating something similar? Tell us what you found under your floors in the comments.
#damp #renovation #oldhouse #SkillBuilder
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(As an Amazon Associate, we earn from qualifying purchases) The Damp Proofing Mistake That Makes Old Houses Worse](https://i.ytimg.com/vi/r6CWpByq01Q/mqdefault.jpg)