Sunday, Apr 13, 2014 at 17:27
Firtsly silicone is an inferiour sealant and has some very real problems.
It does not stick to surfaces intamately and leaks can develope under it.
To be at all effective it needs to be applied under compression being squeased out of the joint.
Even then over a number of years it ( particularly cheap versions) will dry out, shrink up and leak.
Polyeurathane ( sikaflex and similar) is a far better product, harder to work and way more expensive...but far superiour.
Resealing something that has been sealed with silicone can be a problem.....getting the surface clean and free of silicon sufficient for a good bond is no picnic.
Severity
If you have a leak that severe, ya not looking at a leak on a vertical surface...unless it has water flow......you have to be looking at somewhere where water is flowing or pooling....hell maybe even a hole.
5 to 6 bath towels in half a hour.....HELL, that is not a leak, that is a flow.
I think you need to start having a good look up on the roof.
every joint, lap, and rivet.....where the roof meets the walls would be a good suspect and deserving of a serious poke.
If you have that quantity of water...testing with the garden hose should yeild results.......but dont just go hoseing about....you need to be systematic about it
cheers
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