Yes its the insulation clips that have not been used to keep the insulation in place.
I'm thinking if the roof is taken off and insulation secured at the top and battens used to hold the insulation in place on one side of the cavity may solve this.
Anybody with other ideas to overcome...
Hello everyone, I have am undergoing a playroom project where I have put up the blocks (thermal and concrete) with a cavity of 4 inches, for the insulation I have used 3 inch cavity bats. The building regs came down and said the insulation insulation is fine but I should have used cavity...