Loft insulation

Loft insulation that keeps your home warmer for longer

Most of the heat a house loses through its roof can be held back with a deep, even layer on the loft floor. We explain the options and quote for free.

  • Free, unhurried advice
  • Natural and recycled options
  • Written quote first
  • No obligation

Illustration: a finished loft with insulation over the joists

About this service

We lay insulation between the ceiling joists and then a second layer across them, so the whole loft floor is covered to a good depth. You can choose everyday mineral wool or a natural or recycled material.

What’s included

  • A look at the loft, the access and anything already up there
  • Plain advice on material and depth for your house
  • Insulation between the joists and a layer across them
  • Eaves left clear so air can move through the roof
  • The hatch insulated and draught-sealed
  • Everything set out in a written quote first

We price the job after looking at your loft. You get a written quotation before any work is agreed.

What we do

We start by looking at what’s already in the loft and whether it’s dry and sound. Then we lay the first layer between the ceiling joists and a second at right angles across them, so the timber doesn’t become a cold line and the floor is covered evenly. We keep the gaps at the eaves open so the roof space can breathe, lag any pipes and tanks above the new layer, and lift cables so they sit on top.

Choosing a material

Mineral wool is the everyday choice and very good value. Sheep’s wool and recycled polyester insulate about as well for the same depth and are nicer to handle, but cost more. If you’re curious about the natural options, ask: your quote can show more than one, so you can compare.

Where the insulation goes

Always on the loft floor, between and over the joists. We don’t fill the spaces between the rafters with wool: the roof needs air moving under it. The only thing we ever fix to the rafters is thin foil insulation, where a room in the roof or a tight space calls for it.

The process

How it works

  1. Tell us about your home

    Your postcode, the kind of house and what you’d like done. It takes about a minute and costs nothing.

  2. We talk it through

    We get in touch, explain the options in plain words and, where the job needs it, come and look at the loft.

  3. Your quote, in writing

    You get a written quote with the work, the material and the price. Take your time over it.

  4. Only if you’re happy

    There’s no obligation. If you go ahead, we agree a day that suits you and do the work.

Loft insulation: your questions answered

How deep should loft insulation be?
For mineral wool, around 270 mm is the depth commonly recommended. Other materials can need a slightly different depth to do the same job. We’ll say what we suggest for your loft in the quote.
How long does it take?
Most lofts are done in a day or less. Clearing a full loft or taking out old insulation first can add time; we tell you in the quote.
Can I still use the loft for storage?
Yes. A raised floor on legs sits above the full depth of insulation, so you keep both the warmth and the space.
Is the work guaranteed?
Eligible installations carry a guarantee of up to 5 years. Your written quote says whether your job qualifies and what it covers.

Find out what your loft needs, in plain words

Tell us about your home. We’ll explain the options and send a written quote. No obligation.

Free quote
Get a free quote