01632 960 048 Mon to Sat, 7am to 6pmWritten quotes within one working day
Apex Build Pro Ltd
EPC / Energy Performance Certificate

The green to red scale.

Every home that is sold or let in England and Wales needs an EPC. It grades the building from A down to G. Loft insulation is one of the cheapest ways to move up a band, and spray foam in the roof can complicate the whole thing.

Get a quote
  • A92 to 100
  • B81 to 91
  • C69 to 80
  • D55 to 68
  • E39 to 54
  • F21 to 38
  • G1 to 20

The bands and score ranges used on EPCs in England and Wales. Your certificate shows a current score and a potential score.

What the certificate tells you.

An EPC is produced by an accredited assessor who visits the house, looks at the construction, heating, windows and insulation, and feeds that into a standard calculation. The result is a score out of 100 and a band letter. It lasts ten years.

  • Current rating. Where the house sits today.
  • Potential rating. Where it could get to if you did the recommended work.
  • Recommendations. A list of measures, each with an indicative cost and the band it would move you to. Loft insulation is usually near the top of that list.

Landlords in England and Wales currently need at least an E to let a property, and the government has consulted on raising that. Buyers look at the band too, and a poor one is a negotiating point.

Fresh mineral wool insulation laid between and across loft joists
Fig. 01 Mineral wool at joist level, the measure an assessor expects to find.

How our work affects it.

We are not EPC assessors and we do not issue certificates. This is what we see on the jobs we do.

  1. Loft insulation

    An uninsulated or thinly insulated loft is one of the biggest single losses in an older house. Topping up to the current guidance depth is the recommendation that appears on most EPCs, and it is the cheapest one on the list.

  2. Spray foam

    Foam sprayed on the underside of the roof does insulate, but assessors, surveyors and lenders often cannot see the timbers under it. Removing it and insulating at joist level gives a result everyone can inspect.

  3. Boarding

    Boards laid straight on the joists crush the insulation and undo its benefit. We board on a raised frame so the full depth of wool stays in place.

  4. The evidence

    Our dated photos and the invoice describing the depth and product laid give a new assessor something to record, rather than guessing.

Got an EPC with "loft insulation" on it?

Send us the recommendation and the loft size and we quote for exactly that measure.

Quote for loft insulation 01632 960 048