Due to the national shortage of PIR (Celotex, Kingspan etc.) insulation, we did some research into alternative solutions at Thames Design & Build. We came across Actis Insulation, which have a product called Hybris, which can be installed between studs, rafters and joists as an alternative to PIR board in lots of situations. When this is combined with their HControl Hybrid or Boost Hybrid products, the required U-Values for Building Regulations are easily achieved. The pros a