How to board a loft

Inspired by Homebuilding & Renovating. This guide draws on the practical walkthrough "How to Board a Loft" from the Homebuilding & Renovating channel, produced in association with LoftLeg. Their demonstration of raised loft legs — showing how they keep insulation fully effective while still giving a firm floor — is the most useful part of the video and well worth watching before you buy any materials.

1. Check the structure and clear the space

Before you take a single board up through the hatch, check that the joists are in reasonable condition. Poke them with a screwdriver to check for soft spots or rot, particularly near the eaves. If anything looks suspect, stop and get it looked at properly before adding weight.

Clear out anything already up there and sweep the area clean. Working in a cluttered loft with boarding boards in hand is not fun, and it is how things get stood on and broken.

2. Measure up and plan the layout

Measure the joist centres — usually 400 mm or 600 mm apart in UK homes. Standard loft boards are designed to span these centres, but check the product you are buying against your actual joist spacing before ordering.

Sketch out how many boards you need and where they will run. Think about where the hatch is and plan the boarding to run away from it logically — you want to be able to reach anything stored without crawling over the whole floor.

3. Use raised loft legs to protect insulation

This is the step most people skip, and it is the one that matters most. Laying boards directly onto joists compresses the insulation beneath them, reducing its effectiveness significantly. Loft leg stilts clip or screw onto the joists and raise the boarding above the insulation level.

To be fair, if your loft has very little or no existing insulation, flat boarding onto the joists is fine for now — just bear it in mind if you add insulation later. The legs are not expensive and save the bother of lifting boards again in future.

4. Cut boards to fit around obstacles

Most lofts have water tanks, pipes, cables, and bracing timbers to work around. A jigsaw is the right tool for this — it cuts chipboard cleanly and handles curves. Mark cuts clearly before you start and keep cut boards labelled if they will not be immediately obvious where they go.

Leave a gap around any cold water tanks to allow for inspection and maintenance access. Boarding right up to a tank looks neat but makes things very difficult if there is ever a problem with it.

5. Fix the boards down securely

Screw loft boards down into the joists or loft legs — do not rely on them sitting in place. A board that shifts underfoot in a dark loft is a fall risk. Pre-drill chipboard to avoid splitting the edges, and countersink the screws flush so they do not snag things.

Some loft boards have interlocking tongue-and-groove edges, which reduces the chance of gaps opening up and makes the floor feel firmer. Worth the extra cost if you plan to use the space regularly.

6. Consider lighting and the hatch

A battery-powered LED strip or a clip-on work light on a long lead makes a real difference to how much you actually use the loft storage. It is dark up there. A proper light makes it usable rather than just technically boarded.

Also check the hatch and its frame while you are at it. A draughty hatch lets cold air in and heat out — a simple hatch insulation kit costs very little and the saving in heating bills adds up quickly.

When to call a handyman

Call Richard if the hatch is too small to get boards through comfortably, if the joists need checking, or if you want the boarding done properly without spending a day up and down a loft ladder. It is a manageable job for most people, but awkward in a tight or poorly lit space.