200mm loft roll insulation
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Product Details
200mm loft roll insulation is a flexible mineral wool roll designed for topping up loft insulation to boost energy efficiency in home improvement projects. Use it as a second layer laid at a 90-degree angle over the first layer between joists, typically achieving depths of 270-350mm to meet building regulations and reduce heating bills. It expands fully for a snug fit, cuts easily with a utility knife, and provides thermal and acoustic insulation while allowing vapour to breathe. Ideal for cold loft spaces, start laying from the furthest corner towards the hatch, leaving 25mm gaps at eaves for ventilation and ensuring no compression around cables or pipes. Always wear a dust mask and use crawl boards to protect the material during installation.
As of May 2026, PriceNailer data confirms that the cheapest price for 200mm loft roll insulation is £35.70 from Roofing Superstore across 8 suppliers. Prices have decreased by 32.9% over the last 1 month.
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Frequently Asked Questions
What coverage does 200mm loft roll insulation provide?
Coverage varies by manufacturer, but typical rolls provide 6-8 square metres of coverage. Always check the pack specifications as width and length can vary between suppliers.
Can I use 200mm loft roll as the first layer of insulation?
No, 200mm loft roll is specifically designed as a second layer to top up existing insulation. The first layer should be installed between joists, then the 200mm roll laid perpendicular across the top.
What total insulation depth will I achieve with 200mm loft roll?
When laid over existing 100mm insulation between joists, you'll achieve 270-300mm total depth. This meets current building regulations requiring minimum 270mm for optimal energy efficiency.
Is 200mm loft roll insulation fire resistant?
Yes, mineral wool loft roll insulation is naturally fire resistant and won't contribute to flame spread. It maintains its insulating properties even when exposed to high temperatures.
Do I need special tools to install 200mm loft roll insulation?
You only need a sharp utility knife for cutting and crawl boards to distribute your weight. Essential safety equipment includes dust masks, gloves and protective clothing due to mineral wool fibres.