Mineral wool, installed at the right depth.
100mm base layer, 200mm top up, 270mm minimum requirement, 300mm our recommendation — laid neatly with proper edge detailing and ventilation.
- Cold upstairs rooms or noticeable heat loss
- Old, compressed or patchy insulation
- Damp, contaminated or pest-affected loft
- Planning boarding and want it done over insulation, not on top
Depths that actually matter.
Mineral wool is the workhorse of UK loft insulation — but only when it's laid at the right depth, in the right way.
- • 100mm — base layer between the joists
- • 200mm — top up laid across the joists
- • 270mm — current UK minimum recommendation
- • 300mm — our recommendation for a noticeably warmer loft
A properly insulated loft reduces heat loss through the roof and improves comfort. Exact bill savings vary — we won't pretend otherwise.
What "done properly" actually means
- 1. Continuous depth — no thin patches around edges
- 2. Maintained ventilation at the eaves
- 3. Pipes and tanks lagged correctly
- 4. Insulation not crushed by storage or boarding
- 5. Hatch and access detailed neatly
A careful, documented process.
No surprises. Every step explained, every step recorded.
- Step 01
Inspection
Depth measurement, condition check, ventilation assessment, access notes.
- Step 02
Spec & quote
Clear written quote with materials, depth and any prep work needed.
- Step 03
Prep
Protect access route, lift any storage, remove old insulation if needed.
- Step 04
Install
Lay to spec, detail edges, lag pipework, maintain ventilation gaps.
- Step 05
Inspect
Walk through with you. Photos for your records.
- Step 06
Tidy & sign off
Everything cleaned up and a short summary of what was done.
Transparent pricing.
Indicative rates — final quote provided after inspection. Pricing depends on access, area, condition and any extras.
Mineral wool installation
- 100mm£10/m²
- 200mm£20/m²
- 270mm£25/m²
- 300mm£30/m²
Mineral wool — assessed, topped up, replaced.
Real UK lofts where we've fixed thin, patchy or compressed mineral wool and brought insulation back up to spec.
Photos from genuine UK LoftSaver mineral wool jobs — before, during and after.
What depth should my insulation be?+
Current guidance is around 270mm of mineral wool for typical UK lofts. We'll measure what's there and recommend honestly.
Can you board over insulation?+
Yes — using a raised boarding system that preserves depth. See our boarding page.
Do you remove the old stuff?+
If it's compressed, damp, contaminated or vermin-affected, yes. Otherwise we may top up cleanly.
Tell us about your loft.
Send photos and a postcode. We'll come back with an honest opinion, usually within one working day.
Urgent mortgage or sale case?
Call 07960 194764 and we'll prioritise your inspection.
Want a warmer loft done once, done right?
Send photos or book an inspection — we'll be straight with you about top up vs replace.