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?
Thank you for your enquiry via our website.
As window reveals are generally an area susceptible to moisture we usually advise using Cornerstone tanking render (2x 10mm layers) to provide protection from water ingress and then Insulating Render on top to allow any excess moisture chance to escape. You can find the products in the Cornerstone section on our website. If you would like further guidance or to talk to us about application etc please call us on 01208 79779 and we’ll be able to assist.