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Roof sealant

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Mars
 Mars
(@editor)
Illustrious Member Admin
Joined: 5 years ago
Posts: 4762
Topic starter   [#327]

The previous owners built a garden room on the side of the house and put a plastisol (that's a product name) roof on it. We've always had small leak issues during heavy rains, and have spent the summer siliconing gaps that we thought might be leaky with a degree of success. With the recent storms we've sprung small leaks again.

I was wondering if anyone has used or can recommend a product that we can "paint" onto the roof to cover a much larger surface area.


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(@george)
Estimable Member Contributor
Joined: 5 years ago
Posts: 85
 

I'm not sure of a paint product for for sealing leaks outside I've found clear CT1 is excellent for stopping leaks and being weatherproof as other sealants would fail after a year in the sun/rain.


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Mars
 Mars
(@editor)
Illustrious Member Admin
Joined: 5 years ago
Posts: 4762
Topic starter  

@george, thanks I’ll check it out. The issue with our roof and sealants is that we don’t where the water enters, so it’d much easier to just paint the entire surface area.


New to heat pumps? Take the Heat Pump Fundamentals course and use INTRO50 at checkout for 50% off.
Rewritten and updated for 2027
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🛠️ Bodge Buster
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(@george)
Estimable Member Contributor
Joined: 5 years ago
Posts: 85
 

It might be worth borrowing/renting a thermal imaging camera as it could show the leaks/paths the water is flowing through.


Mitsubishi Ecodan 14kw ASHP + 500l Cylinder


   
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Mars
 Mars
(@editor)
Illustrious Member Admin
Joined: 5 years ago
Posts: 4762
Topic starter  

@George, I actually have a thermal camera for the week and it never even crossed my mind to use it to identify "leaks". Good idea. I think I'll be up on the ladder tomorrow.


New to heat pumps? Take the Heat Pump Fundamentals course and use INTRO50 at checkout for 50% off.
Rewritten and updated for 2027
📘 From Zero to Heat Pump Hero
🛠️ Bodge Buster
🎧 Prefer to listen? Heat Pumps Explained


   
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