Roof Insulation Gosport

Heat rises, and up to 35% of a home’s warmth can disappear through a roof left under-insulated. That hits hard across Gosport, where much of the housing went up between the wars and after — the 1930s semis at Elson and Hardway, the post-war Bridgemary and Rowner estates, and surviving prefabs — much of it roofed before insulation standards meant anything. On a low-lying peninsula open to wind off the Solent, a roof brought up to today’s standard trims roughly £200 to £400 a year off heating bills.

Knauf Earthwool is a mineral wool we lay between and over the rafters to a depth of 300mm — well past the 270mm government minimum — to hit a 0.16 W/m²K U-value. It is non-combustible, quietens the roof against driving wind and rain, and holds its performance for decades. For the conventional pitched-roof semis and terraces that make up the bulk of the estates at Bridgemary, Brockhurst and Elson, Earthwool is usually the most cost-effective option, priced between £900 and £1,200.

Where rafter depth is shallow, or you want the loft kept usable for storage or a room-in-roof, Superfoil multifoil matches that performance in a far slimmer build-up. Fixed between the rafters, it acts as a radiant barrier as well as an insulant, which suits the prefab and non-standard roofs left from the post-war rebuilding and the loft conversions now common on the peninsula’s tighter terraces. Superfoil is typically priced between £1,200 and £1,800 fitted.

Roof insulation in Gosport has to meet Part L of the Building Regulations, which sets the minimum thermal standard. We install to a 0.16 W/m²K U-value and take care of the full building-control notification ourselves, so there is nothing for you to organise. On cold-roof jobs we fit 25mm eaves ventilation as standard, keeping air moving so condensation cannot build up in the roof space — a sensible safeguard in a damp coastal climate. Proof of compliance also counts when you come to sell.

Both Knauf Earthwool and Superfoil come with manufacturer warranties, and our installation work is covered for 10 to 25 years depending on the product chosen. Fitted properly, roof insulation keeps its performance for decades with no upkeep, so the £200 to £400 a year a Gosport household saves keeps mounting up long after we have left. Every job opens with a free, no-obligation survey and a fixed-price quote — no high-pressure sales, no jargon.