Re-sealing leaking cast iron gutter joints which have caused damp on the party wall. This is a 4 stage process. Firstly the gutter is cleared out & dried. Then a coat of primer is applied to ensure  adhesion. Then a polyurethane sealant is injected into the joint to allow for expansion & contraction from hot/cold temperatures. Lastly a top coat of glassfibre reinforced acrylic membrane is applied.


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