New builds and warranties
Insulation stops short of the new loft hatch and the rest of the loft looks filled. What cold spot is local to the hatch?
The cold spot is local to the loft hatch, where the insulation stops short. The rest of the loft looking filled does not cover that opening. A gap around a new hatch is a break in the quilt at the place you climb through, so the ceiling at the hatch can be colder than the ceiling the insulation still covers. The survey has recorded the shortfall at the hatch. It has not measured a temperature, redesigned the loft insulation, or said the whole roof is uninsulated. NHBC describes Buildmark as a 10-year warranty and insurance product. The note has not opened a claim.
Last reviewed 24 October 2026. Written for buyers in England and Wales unless this answer says otherwise. No named surveyor has signed this page. It is general guidance, not a report on your house, and not legal advice.
What is the fuller explanation?
Loft insulation works as a continuous layer over the warm rooms. A hatch is a hole in that layer unless the lid and the frame are insulated and the quilt is brought up to them. Stopping short leaves a square of ceiling that the rest of a well-filled loft does not protect. The surveyor could see the gap. They did not calculate heat loss, and they did not specify a cover. The cold spot is that local break, not a verdict on every bay of the roof.
Tell the developer the insulation stops short of the hatch, as a loft item, not as a complaint that the whole quilt is missing. Ask the solicitor which warranty applies to an insulation gap on this plot. NHBC describes Buildmark as a 10-year warranty and insurance product. The survey does not open a claim. If someone later fits an insulated hatch cover, that is their work. It is not a specification already written in the report.
What should you ask your surveyor?
- Where does the insulation stop short of the hatch?
- Is the cold spot local to that opening, rather than the whole loft?
- Did you leave any temperature check or new specification unmade?
What are the typical next steps?
- Treat the gap as a cold spot at the hatch only.
- Tell the developer the quilt stops short of the new hatch.
- Do not describe the rest of the filled loft as bare.
Costs vary with the building and with who you instruct. Where this page does not cite a published figure, ask the surveyor, a relevant specialist, or your solicitor for a written quote. Do not treat a forum average as the price.
Also asked about this
If the bedrooms feel warm, has the hatch gap gone?
No. Warm rooms on the day do not fill a gap you can see around the hatch. The cold spot is local to that opening, where the insulation stops short. The rest of the loft looking filled does not close it. The survey has not measured the temperature, and it has not opened a warranty claim.
Should the entire loft be stripped because the hatch is short?
No. The survey described insulation stopping short of the hatch, with the rest of the loft looking filled. That is a local cold spot, not an instruction to strip the roof. The report has not specified new insulation, and it has not opened a warranty claim. Deal with the hatch. Leave the filled bays as they were recorded.