Hi,
Interested to get views on external wall insulation spray coatings such as "Properla".
Through some research it seems as though the benefits are quite well proven for increasing thermal efficiency on already rendered cavity walls, the hydrophobic properties ensuring the water content of the walls is kept to a minimum removing any thermal bridge reducing the insulating properties of the building.
Have been quoted ~£9k for a 160m2 house, just wondering if anyone has any experience of competitive costs for this as there doesn't seem to be a huge amount of contractors providing this out there!
Thanks.