I was approached by a new customer to help resolve the issue of a cold bedroom due to an existing old concrete air vent built into the wall, I was initially asked to remove the vent and make good the area ready for decoration for the customer.
I also recommended a product to the customer that I had used on a previous project which suffered similar problems. I explained to them that this particular thermal wall lining product resolves the issue of walls that are cold to the touch. The product is around 4mm thick and has a woolen like filling between two layers of fabric paper. This was installed on the two external walls of the room and instant thermal benefits were achieved.