Uploaded August 2026 | Updated September 2026, 1 week ago
You spoke, I folded. After all the comments about post rot on my DIY pole barn, I found a rot-protection fix that costs about $3 a post instead of $100+ per sleeve — and poured the footings fast with a mud mixer that makes concrete stupid easy.
This one's a 10x4 lean-to onto the garage for the mower, tractor, grader box, and hopefully the wood splitter. I seal the critical ground-to-air zone with Flex Seal, lay it out in SketchUp, run true lines square off the existing 28x32 barn, and pour. All in for about $400: 4 posts, 8 bags of concrete, 12 bags of gravel, and one can of Flex Seal.
Still think posts don't need protection? Let me know in the comments — we'll find out in 50 years. Next video: framing the lean-to.
Like, subscribe, and check out how I set the poles on the original DIY pole barn.
#PoleBarn #DIY #HomeProHero #FlexSeal #MudMixer #LeanTo
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Huepar 48-Inch Digital Level - amzn.to/44WTDEG
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Disclaimer: Some of the links in this description are affiliate links. If you make a purchase through these links, I may receive a small commission at no additional cost to you. This helps support the channel and allows me to continue to make videos like this. Thank you for your support!
FOR SPONSORSHIPS, BRAND DEALS & COLLABS: homeprohero.net/contact
VIDEO TIMESTAMPS:
00:00 Everyone Said My Pole Barn Posts Would Rot
00:17 Adding a 10x24 Lean-To to the Pole Barn
00:40 Why Posts Rot at the Ground Line
01:03 Flex Seal Post Protection for $3 a Post
01:27 How Far Up the Post to Seal
01:43 Do You Actually Need Post Rot Protection?
02:29 Running String Lines for Post Layout
02:43 Paying $50 a Hole to Have Them Drilled
03:02 Using SketchUp to Lay Out the Lean-To
03:20 Squaring Off the Existing 28x32 Pole Barn
04:08 Checking Square with Diagonal Measurements
04:42 Setting the 10-Foot Line and 8-Foot On Center Posts
05:06 Adding the Gravel Drainage Base
05:43 Bracing the Posts with 2x4s
05:52 Huepar Laser to Get Posts at 90 Degrees
06:11 Why I Don't Pour Concrete Dry
06:32 Mixing Concrete with the MudMixer
07:14 First Pour and Dialing In the Consistency
08:28 Pouring the Remaining Post Holes
09:19 MudMixer Cleanup
09:49 Backfilling with Gravel to the Flex Seal Line
10:29 Total Cost of the Post Install
10:57 Next Up: Framing the Lean-To
You spoke, I folded. After all the comments about post rot on my DIY pole barn, I found a rot-protection fix that costs about $3 a post instead of $100+ per sleeve — and poured the footings fast with a mud mixer that makes concrete stupid easy.
This one's a 10x4 lean-to onto the garage for the mower, tractor, grader box, and hopefully the wood splitter. I seal the critical ground-to-air zone with Flex Seal, lay it out in SketchUp, run true lines square off the existing 28x32 barn, and pour. All in for about $400: 4 posts, 8 bags of concrete, 12 bags of gravel, and one can of Flex Seal.
Still think posts don't need protection? Let me know in the comments — we'll find out in 50 years. Next video: framing the lean-to.
Like, subscribe, and check out how I set the poles on the original DIY pole barn.
#PoleBarn #DIY #HomeProHero #FlexSeal #MudMixer #LeanTo
🔴Get the Tools & Products I Used In This Video: homeprohero.net
Huepar 48-Inch Digital Level - amzn.to/44WTDEG
🔔 Subscribe for More DIY and Home Improvement Content: youtube.com/channel/UCmPc7lvTIm-J9GmvQku5wAw/?sub_confirmation=1
📝 Grab My Exclusive DIY Plans!
• Visit My Etsy Store: homeprohero.etsy.com
FOLLOW ME 📸
► Instagram: instagram.com/homeprohero
► Facebook: facebook.com/homeprohero
► TikTok: tiktok.com/@homepro.hero
► Etsy: etsy.com/shop/HomeProHero
🔔 Stay Updated! Subscribe and Enable Notifications for New Episodes! #homeprohero
Disclaimer: Some of the links in this description are affiliate links. If you make a purchase through these links, I may receive a small commission at no additional cost to you. This helps support the channel and allows me to continue to make videos like this. Thank you for your support!
FOR SPONSORSHIPS, BRAND DEALS & COLLABS: homeprohero.net/contact
VIDEO TIMESTAMPS:
00:00 Everyone Said My Pole Barn Posts Would Rot
00:17 Adding a 10x24 Lean-To to the Pole Barn
00:40 Why Posts Rot at the Ground Line
01:03 Flex Seal Post Protection for $3 a Post
01:27 How Far Up the Post to Seal
01:43 Do You Actually Need Post Rot Protection?
02:29 Running String Lines for Post Layout
02:43 Paying $50 a Hole to Have Them Drilled
03:02 Using SketchUp to Lay Out the Lean-To
03:20 Squaring Off the Existing 28x32 Pole Barn
04:08 Checking Square with Diagonal Measurements
04:42 Setting the 10-Foot Line and 8-Foot On Center Posts
05:06 Adding the Gravel Drainage Base
05:43 Bracing the Posts with 2x4s
05:52 Huepar Laser to Get Posts at 90 Degrees
06:11 Why I Don't Pour Concrete Dry
06:32 Mixing Concrete with the MudMixer
07:14 First Pour and Dialing In the Consistency
08:28 Pouring the Remaining Post Holes
09:19 MudMixer Cleanup
09:49 Backfilling with Gravel to the Flex Seal Line
10:29 Total Cost of the Post Install
10:57 Next Up: Framing the Lean-To
