Roofing

New granny annexe warm roof - multiple melt holes appearing in the snow!

Anonymous user 03/03/2024 - 3.27 PM

I had a builder create a granny annexe for my 96 year old mum to live with us, from an existing garage at the side of the main house. He suggested also adding a warm roof which substantially added to the cost but said it will be warm and you will save on heating. So we bit the bullet and went ahead. However come the winter when it snowed I expected the roof to be be covered evenly in snow. However to my dismay there were lots of regular, small holes in the snow, a couple of inches in diameter and about 4 inches deep going down all the way to the roof surface demonstrating that warm air was being lost in all these places all across the roof! What is the likely cause of this? What problems are likely to occur if left unchanged? What needs to be done to rectify it? What should I do now please? Help! All advice gratefully received. Thank you very much. Bob The helpful answer I received from Goodwin Roofing Ltd is: "Hi, this could be cold bridging through the insulation fixings I’ve seen this before but only with frost on the roof." So the questions that follow what do I need to do now? What problems are likely to occur if left unchanged? What needs to be done to rectify it? Thanks! Bob