DIY Doctor

how do you seal gap between external wall and gas flue?

Postby steviefaefife » Mon Nov 19, 2007 4:01 pm

Any ideas how to make a warterproof seal between the external wall and the gas flue, with the recent heavy rain we have had water coming back in to the house as there is around a half inch gap between the top of the flue and the wall?

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Gorilla Glue heavy duty grab adhesive

Postby toptips » Sun Nov 25, 2007 9:51 pm

hi,is this a new flue?get a bag of ready mixed mortar(sand and cement)and a pointing trowel.try and get the mix as far into the wall as you can.hope this helps .p.s. dont forget to add water to the mix.
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