Services

Top up thin loft insulation without starting again

If the insulation you have is dry and in good order but too thin, a new layer across the top brings it up to depth. We’ll check it first and quote for free.

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

Illustration: a new layer laid across an older, thinner one

About this service

A top-up keeps the insulation you already have and adds a second layer across the joists, so the loft reaches a good depth without the cost and mess of stripping it out.

What’s included

  • A check that the existing insulation is dry and sound
  • A new layer laid across the joists
  • Natural, recycled or mineral wool, as you prefer
  • Eaves kept clear for ventilation
  • Pipes, tanks and the hatch dealt with
  • A written quote before anything is agreed

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

Is a top-up right for you?

Many lofts were insulated decades ago to the depth that was normal then. If yours sits level with the top of the joists or below, it’s likely to be well short of what’s recommended now. As long as it’s dry, clean and not crushed, it can stay where it is.

How we do it

We lay the new layer at right angles across the joists, over the top of what’s there. That covers the timber and evens out the depth across the whole floor. We keep the eaves clear, lag anything that will now sit in a colder loft, and lift cables out from underneath.

When a top-up isn’t the answer

If the old insulation is damp, dirty, full of droppings or squashed flat by years of storage, laying more on top just hides the problem. In that case we’ll suggest taking it out first, and explain why.

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 top-up: your questions answered

How do I know if my loft needs topping up?
Look across the loft floor. If you can see the tops of the joists, or the insulation is level with them, it’s probably too thin. A simple ruler pushed down gives a rough idea.
Can you top up with sheep’s wool?
Yes. Wool can go over existing mineral wool. We’ll tell you how much you’d need and what it would cost compared with mineral wool.
Do I need to clear my storage?
The area being topped up needs to be clear. If that’s a big job, tell us on the form and we can include clearing it.
Is it a quick job?
Usually. Most top-ups take a few hours to a day, depending on the size of the loft and how easy it is to get into.

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