How Much Does Loft Boarding Cost in the UK? (2025 Guide)
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Loft boarding is one of the most popular home improvement projects in the UK — and for good reason. It transforms a dark, dusty, unusable attic into a clean, accessible storage space that can free up room throughout the rest of your home.
But how much does it actually cost? The answer depends on whether you hire a professional or do it yourself, the size of your loft, and the type of boarding system you choose. In this guide, we break down everything you need to know.
Loft Boarding Cost: Quick Summary
| Option | Typical Cost | Time |
|---|---|---|
| Professional installation (small loft, ~20m²) | £800–£1,500 | 1–2 days |
| Professional installation (large loft, ~40m²) | £1,500–£3,000 | 2–3 days |
| DIY with loft stilts and boards | £200–£600 | 1 day |
What Affects the Cost of Loft Boarding?
1. The Size of Your Loft
The most significant factor is simply how much floor area you want to board. Most UK homes have lofts between 15m² and 50m², and costs scale roughly linearly with area. A small terraced house might only need 15–20m² of boarding, while a large detached home could have 40m² or more.
2. Raised vs Flat Boarding
This is where many homeowners are caught out. Standard flat loft boarding — where boards are laid directly on the joists — is cheaper upfront, but it compresses your insulation. The UK government recommends a minimum of 270mm of loft insulation, and compressing it can reduce its effectiveness by up to 50%.
Raised loft boarding, using a system like our Loft Stilts, lifts the boarding platform above the insulation — preserving its full depth and keeping your home warmer. This adds a small amount to the material cost but is the correct way to board a loft.
3. Labour Costs
If you hire a professional, labour typically accounts for 50–60% of the total cost. A carpenter or loft specialist will typically charge £150–£250 per day, and most loft boarding jobs take 1–2 days.
4. Access and Hatch Size
If your loft hatch is small, boards need to be cut to fit through it — which adds time and waste. Some homeowners also choose to upgrade their loft hatch at the same time, which adds £100–£300 to the project cost.
DIY Loft Boarding: What Does It Cost?
DIY loft boarding is significantly cheaper than professional installation and is well within the capabilities of most homeowners with basic DIY skills. Here's a typical cost breakdown for a 20m² loft:
| Item | Quantity | Approximate Cost |
|---|---|---|
| Loft stilts (raised boarding system) | Box of 128 | ~£80–£120 |
| OSB loft boards (1220 x 300mm) | Pack of 18 x 4 | ~£120–£180 |
| Screws (4.0 x 30mm) | Pack of 200 | ~£10–£15 |
| Loft light (optional) | 1 | ~£20–£30 |
| Total | ~£230–£345 |
Compare that to £800–£1,500 for professional installation of the same area, and the savings are clear. Most people complete a 20m² loft boarding project in a single day.
Is DIY Loft Boarding Safe?
Yes — provided you follow a few basic safety rules:
- Always step on the joists, not between them, until the boards are in place
- Use a proper loft ladder — don't rely on a stepladder
- Wear a dust mask, especially if your loft has old insulation
- Work with a partner if possible, especially when passing boards up through the hatch
- Never overload your loft — most domestic loft joists are designed to carry light storage loads only
Should You Use Raised or Flat Loft Boarding?
In short: always use raised boarding. Here's why:
The UK government's Standard Assessment Procedure (SAP) for energy efficiency assumes that loft insulation is not compressed. If you compress your insulation by laying boards directly on the joists, your home's actual energy performance will be worse than its EPC rating suggests — meaning higher energy bills and a less comfortable home.
Raised loft boarding systems, like our Loft Stilts, cost only slightly more than flat boarding but preserve the full depth of your insulation. They're also easier to install, as the stilts clip onto the joists and hold the boards firmly in place without the need for precise measurement.
Ready to Start Your Loft Boarding Project?
We stock everything you need for a complete DIY loft boarding project:
- Loft Stilts — available in packs of 32 to 256, with free UK delivery
- OSB Loft Boards — 1220 x 300mm, packs of 6, 12, or 18
- Screws — 4.0 x 30mm, packs of 200 to 1000
If you're not sure how many stilts or boards you need, email us at info@thediyer.co.uk with your loft dimensions and we'll work it out for you.