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I am having 3 windows replaced on the weather side of a granite cottage. These were previously poorly sized and fitted. There has been a history of damp in this wall mainly below the windows. The exterior is pointed with a ‘hard’ concrete, the internal wall is rendered with 1-2” of sand/cement render. I believe repointing and re rendering with lime is the best solution but due to time and money am going to get new windows installed well first.

I am going to fit vertical dpc and lead trays. What is the best product to finish the reveals inside and bed the windows in/fillet externally?

Could I try to waterproof with a tanking layer of prompt natural cement or use Cornerstone Insulating Render to insulate and possibly absorb any moisture?

daniel-dandy Changed status to publish December 6, 2022