Uploaded April 2026 | Updated September 2026, 1 week ago
Roger's back with another viewer question, and this one's a cracker.
Mark uncovered a crack in his extension wall after stripping back the plasterboard, and it turned out the surveyor had never even seen it. Sound familiar?
If you've been losing sleep over a crack in your walls, this one's for you. Roger breaks down what's actually going on, why it's almost certainly nothing serious, and what a few simple brackets and a tube of sealant can do. Job done.
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Key Takeaways:
• Surveys can only report what's visible — hidden problems often reveal themselves during renovation work
• An even crack from top to bottom typically points to block shrinkage, not structural movement
• Slotted L-shaped galvanised brackets are a simple, effective fix — the slots allow for future movement, just like a slip tie
• The existing timber has been quietly doing a lot of stabilising work — worth replacing its job with a few brackets before boarding over
• On the outside, a mastic movement joint is perfectly normal — re-gun with polymer sealant if it's pulling away
• Movement joints are best hidden behind downpipes or tucked into corners where possible
• Cracks are rarely as scary as they look — houses are tougher than we give them credit for
_______________________
#SkillBuilder #WallCrack #ExtensionRepair #DIYBuilding #RogerBisby
==================================
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==================================
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Roger's back with another viewer question, and this one's a cracker.
Mark uncovered a crack in his extension wall after stripping back the plasterboard, and it turned out the surveyor had never even seen it. Sound familiar?
If you've been losing sleep over a crack in your walls, this one's for you. Roger breaks down what's actually going on, why it's almost certainly nothing serious, and what a few simple brackets and a tube of sealant can do. Job done.
Got a question of your own? Send it in — Ask Skill Builder is a free service!
📪 ASK SKILL BUILDER
skill-builder.uk/send
We have over 1,300 episodes. Join 738,000 subscribers and help us hit that 1 million milestone!
_______________________
Key Takeaways:
• Surveys can only report what's visible — hidden problems often reveal themselves during renovation work
• An even crack from top to bottom typically points to block shrinkage, not structural movement
• Slotted L-shaped galvanised brackets are a simple, effective fix — the slots allow for future movement, just like a slip tie
• The existing timber has been quietly doing a lot of stabilising work — worth replacing its job with a few brackets before boarding over
• On the outside, a mastic movement joint is perfectly normal — re-gun with polymer sealant if it's pulling away
• Movement joints are best hidden behind downpipes or tucked into corners where possible
• Cracks are rarely as scary as they look — houses are tougher than we give them credit for
_______________________
#SkillBuilder #WallCrack #ExtensionRepair #DIYBuilding #RogerBisby
==================================
👇 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
