Raised loft boarding
Raised loft boarding is a storage floor fixed on plastic or timber legs that lift it above the insulation, leaving the full 270 mm or more underneath and an air gap below the boards. It lets you use the loft for storage without flattening the insulation that keeps the house warm.
What is raised loft boarding?
Laying boards straight onto the joists compresses the insulation to the joist depth, which can halve its value, and can trap moisture under the boards. Loft legs screw to the joists and carry the boards at the right height. We board the area you need, usually around the hatch, and leave the rest of the loft at full depth.
Is it right for your loft?
- You need the loft for storage
- Existing boards were laid flat over thin insulation
- You are insulating or topping up at the same time
- You want a safe walkway to the tank or boiler
How we do it
- We agree the boarded area and how much weight it needs to carry.
- Insulation under the boarded area is brought to full depth first.
- Loft legs are fixed to the joists and checked for level.
- Boards are fitted with a small gap below them for air to move.
What is included
- Loft legs fixed to the joists
- Moisture-resistant chipboard or OSB boards
- Full-depth insulation under the boarded area
Worth knowing
A loft floor is designed for light loads. Heavy storage, water tanks or equipment need the joists checked, and some trussed roofs limit what can be stored. We tell you if your loft is not suitable for boarding.
How much does raised loft boarding cost?
This work is not an energy-saving material for VAT, so it is standard-rated if VAT applies. Where it is done alongside insulation, the quote shows each part separately.
Do the rules differ across the UK?
Yes, a little. Building regulations and funding schemes are set separately in each nation. Here is the short version; each area page has the detail.
| Nation | Building rules | Funding to check |
|---|---|---|
| England | Approved Document L; insulation alone is not usually notified | ECO4 to 31 Dec 2026; Warm Homes Plan and Warm Homes: Local Grant |
| Wales | Welsh Approved Document L; conversions need building control | Warm Homes Nest; ECO4 to 31 Dec 2026 |
| Scotland | No building warrant normally needed; standards still apply | Home Energy Scotland grant and loan; Warmer Homes Scotland |
| Northern Ireland | NI Building Regulations (Technical Booklet F1); check with council building control | Affordable Warmth Scheme; NISEP |
Questions about raised loft boarding
How much weight can a boarded loft take?
Ordinary household storage such as boxes and cases is fine on most lofts. Heavy items need the joists assessing. Trussed roofs are lighter than traditional cut roofs.
Is loft boarding included in VAT relief?
No. Boarding is not an energy-saving material, so it is standard-rated if VAT applies, while the insulation underneath can be zero-rated.
Can you board the whole loft?
We can, but we usually advise boarding only what you need. Every boarded area costs more and makes later checks under the floor harder.
Where we provide raised loft boarding
England
- Bedfordshire
- Berkshire
- Bristol
- Buckinghamshire
- Cambridgeshire
- Cheshire
- Cornwall
- County Durham
- Cumbria
- Derbyshire
- Devon
- Dorset
- East Riding of Yorkshire
- East Sussex
- Essex
- Gloucestershire
- Greater London
- Greater Manchester
- Hampshire
- Herefordshire
- Hertfordshire
- Isle of Wight
- Kent
- Lancashire
- Leicestershire
- Lincolnshire
- Merseyside
- Norfolk
- North Yorkshire
- Northamptonshire
- Northumberland
- Nottinghamshire
- Oxfordshire
- Rutland
- Shropshire
- Somerset
- South Yorkshire
- Staffordshire
- Suffolk
- Surrey
- Tyne and Wear
- Warwickshire
- West Midlands
- West Sussex
- West Yorkshire
- Wiltshire
- Worcestershire
Scotland
Often booked with it
Read more
Sources, checked October 2026: Energy Saving Trust: roof and loft insulation; Which?: loft insulation costs and savings; LABC: building regulation requirements for loft insulation; GOV.UK: extending the ECO4 end date, government response.
