Is there a watertight cement to fix leak?

johnsmi

Hi folks,

I have a tiled roof on a boiler house but have a problem with a little rain water leaking in near the exhaust chimney (of the boiler) on the roof. There is some lead around the base of the tin chimney and also there is ample slope on the roof as far as I can see to let rain drain away but maybe a little build up behind chimney.

Can I get a waterproof type cement to seal the joins where the tiles meet or is it best just to use silicon?

thanks a lot for any help

John

docmatt

Yes there is this putty stuff that seals leaks even high pressure leaks but i can't blimmin remember the name of the stuff!

WLM21

Maybe try flashband, such as this

http://www.bostik.co.uk/construction/product/evo-stik/Flashband/413

available at Wilkinsons, B& Q and most good haredware stores. It's like a form of flashing, but is adhesive.

diable

I can't remember what its called either but there is a cement that sets even in water, used it to repair a sewer pipe years ago.


I think this was it

ormus

http://www.thompsonsweatherproofing.co.uk/products/range.jsp?range=roofseal

one of these products will do the job.

iamcornholio

Cement will crack on a roof terminal like this

You need to find out if the lead slate has cracked, or if a collar is missing or defective - which are the two most common defects