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- 6 Dec 2022
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My builders just completed a single story pitched roof extension on the back of my property.
75mm celotex was cut and jammed between the rafters, then 50mm celotex backed plasterboard was screwed to the rafters, so a total of 125mm insulation. Above that is a membrane, then the roof tiles.
My issue: To fit downlights, circa 200mm gaps were left open in the 75mm celotex. 70mm holes have then been cut through the plasterboard and insulation to accommodate the downlight. End result, I have 8 holes in my ceiling that have zero insulation. The only barrier between the downlight and the outside is roof tile and a membrane. These areas act as chimneys, and IMO absolutely negate any insulation anywhere in the room.
My builder claims this meets building regulations. I can't see how that can be true. My plan is to simply jam a load of rock wool into the void (the downlights are rated for it).
Thoughts?
75mm celotex was cut and jammed between the rafters, then 50mm celotex backed plasterboard was screwed to the rafters, so a total of 125mm insulation. Above that is a membrane, then the roof tiles.
My issue: To fit downlights, circa 200mm gaps were left open in the 75mm celotex. 70mm holes have then been cut through the plasterboard and insulation to accommodate the downlight. End result, I have 8 holes in my ceiling that have zero insulation. The only barrier between the downlight and the outside is roof tile and a membrane. These areas act as chimneys, and IMO absolutely negate any insulation anywhere in the room.
My builder claims this meets building regulations. I can't see how that can be true. My plan is to simply jam a load of rock wool into the void (the downlights are rated for it).
Thoughts?