Room-in-roof insulation
A converted loft or dormer bedroom loses a lot of heat through its sloping ceilings and stud walls. Insulating it properly is often a big, overlooked EPC win.
What it is
Insulation to the pitched (sloping) ceilings, the small vertical "stud" walls at the eaves, the flat top ceiling and any dormer cheeks of a habitable loft room. It differs from ordinary loft insulation because the space is lived in — there is no open loft floor to lay rolls across, so each surface of the room is treated in turn.
Why it matters for 2030
Loft conversions done before modern standards are frequently under-insulated, and because the room is heated the losses are large. Bringing a room-in-roof up to standard can move the EPC score materially, and it makes what is often the coldest room in the house comfortable to let.
Which homes suit it
Any property with a converted loft, dormer or "room in the roof". The work is more involved than a standard loft top-up and usually best done in a void period, since ceilings and eaves storage may be opened up. Ventilation to the roof structure is maintained so the timbers stay dry.
Grants that apply
Room-in-roof insulation is a recognised measure under the Warm Homes: Local Grant and ECO4 (to 31 December 2026), and is zero-rated for VAT until 31 March 2027. Grant funding counts towards your £10,000 cost cap. See the grants page.
How we do it
Coordinated to PAS 2035, installed to PAS 2030 by our accredited partner LAMTANS Engineering, lodged with TrustMark. Fixed price from our own book, as part of your free assessment.
Related: loft insulation · internal wall insulation · draught-proofing