Loft insulation that keeps the warmth where it belongs

Why loft insulation is the smartest first step

If your home only ever gets one energy upgrade, loft insulation should usually be it. Heat rises, and in a poorly insulated home a huge share of the warmth you pay for simply drifts out through the roof. Insulating the loft traps that heat inside, so your heating works less hard and your bills come down.

It's also one of the most affordable improvements you can make, with no disruption to how your home looks or works. There are no radiators to move, no pipework, no mess — just a warmer, more comfortable home that costs less to run.

How much does loft insulation cost?

At Aspire Energy, professional loft insulation starts from £1,400, fully fitted. The exact price depends on a few simple things: the size of your loft, how much insulation (if any) is already up there, and how easy the space is to access.

Rather than guess, we give you a clear, fixed price after a free survey — so you know exactly what you'll pay before any work starts. No estimates that creep up, no surprises on the day.

• Loft size — larger lofts need more material and time.
• Existing insulation — topping up is cheaper than starting from scratch; old or damp insulation may need removing first.
• Access & boarding — awkward access or a need to re-board the loft can affect the price.

Our loft packages — from insulation to a fully usable loft

Most people start with insulation, but your loft can do so much more. We offer four packages, so you can simply keep the heat in, or turn a dusty, awkward roof space into safe, usable storage you can actually walk into.

Loft boarding — storage without losing the warmth

The mistake many people make is laying boards straight onto the joists, which crushes the insulation beneath and undoes its benefit. We fit raised loft boarding on purpose-made legs that sit above a full depth of insulation — so you keep every bit of thermal performance and gain a solid, usable floor for boxes, cases and seasonal storage.

Easy-access loft hatch & ladder — open up the whole space

A small, awkward hatch is what stops most people using their loft. Our easy-access package fits a larger, insulated loft hatch with an integrated wooden loft ladder — sturdy, simple to pull down, and safe to climb. Suddenly the whole roof space becomes accessible storage rather than a dusty gap you can barely reach.

• A bigger, safer opening — easy to get through, with a proper ladder rather than a wobbly stepladder.
• An insulated, draught-sealed hatch — so the new access doesn't become a new source of heat loss.
• A whole new world of storage — reclaim the space above your head for everything cluttering your home.
• Optional loft light — we can fit a switched light so you're never rummaging in the dark.

How much could loft insulation save you?

The clearest figures come from the Energy Saving Trust. For a gas-heated home going from an uninsulated loft up to the recommended 270mm depth, their 2026 estimates are:

• Semi-detached house: around £580 a year on heating bills.
• Detached house: around £355 a year.
• Topping up from 100mm to 270mm: around £135 a year — smaller, because the first layers do most of the work.

There's a carbon saving too: the Energy Saving Trust estimates a semi-detached home cuts around 600kg of CO₂ a year after loft insulation, and a detached home around 1,000kg.

What's involved in the installation

Loft insulation is refreshingly straightforward. After your free survey, our installers arrive at the agreed time, protect your home, and lay insulation to the recommended depth across the loft floor — making sure it sits above every heated room without blocking ventilation. Most homes are completed within a single day.

We tidy up completely before we leave, and back the work with a guarantee. You'll feel the difference the next cold evening.

The types of loft insulation we install

• Blanket roll (mineral/glass wool) — the most common and cost-effective option for standard accessible lofts.
• Loose-fill / blown insulation — ideal for irregular or hard-to-reach spaces.
• Room-in-roof insulation — for loft conversions and rooms built into the roof space. Ask us about this option.