What are bargeboards and do they need replacing?

What a bargeboard does

On a house with a gable, the wall at the end of the roof rises to a point, and the roof stops at a sloping edge. That edge is called the verge. The bargeboard, sometimes called a verge board, is nailed or screwed along it, normally to the barge rafter or the projecting roof timbers. It is the gable's equivalent of the fascia along the eaves.

It has three jobs. It shields the cut timber ends of the roof, which would soak up rainwater if left bare. It gives the verge a finished edge. And on many houses it provides the surface that the gable's soffit, the underside board, is fixed to, closing the gap beneath the overhang so birds and wind-driven rain stay out.

Bargeboards range from a plain painted plank to carved and shaped boards that give a Victorian or Edwardian gable its character. Where the board is decorative, the shape is part of the house, and replacing it with a flat strip changes how the building looks. That matters on a listed property or in a conservation area.

Do not confuse them with the fascia along the eaves, or with the gutter below. Our guide to soffits and fascias covers the eaves side of the roofline.

Signs a bargeboard is failing

Timber bargeboards live in an exposed spot. They take the weather from the side and from above, and the top edge sheds water onto the board itself. Most problems start with the paint.

• Peeling or blistered paint. Once the paint film breaks, water gets into the grain and the timber starts to take up moisture.
• Soft or spongy timber. Press a screwdriver gently into the lower edge or the joints. If it sinks in without effort, there is rot.
• Splits and open joints. Boards that are cracked along the grain, or have gaps where two lengths meet, let water in and reach the timber behind.
• Loose or sagging lengths. A board pulling away from the barge rafter, or leaning at the bottom, has lost its fixings or the wood holding them.
• Staining below. Dark streaks on the gable wall under the board suggest water is running through rather than off.

Binoculars from the garden will tell you a lot. The worst of it is often at the lower end of each run and at joints, where water collects and end grain is open. A board that is only dirty or has flaking paint may need little more than preparation and repainting.

What sits behind the board

A failing board is often a symptom. Behind it sit the verge details, and those decide how long any new board will last.

On a tiled roof, the verge is normally finished with special verge tiles bedded in mortar, or with dry-fix, meaning a kit of plastic or metal parts clipped and screwed down without mortar. Where the mortar has cracked and fallen out, rain blows under the tiles and runs down onto the bargeboard timbers. On a slate roof, the slate ends are held at the edge by nails and sometimes by lead or a cloak of slate. Wherever it sits, the barge rafter carrying the board can be damp for years before any rot shows outside.

The correct order of work therefore starts with what is behind. We check the verge covering, the underlay at the edge and the timbers the board is fixed to. Fixing a new board to rotten rafters just moves the problem a few years down the line. Verge tiles are expected to be mechanically fixed under BS 5534:2014, so a verge held only by mortar deserves a look in its own right.

Our page on soffit materials helps when you are choosing what goes on the underside of the same overhang.

Repair or replace

Which route to take turns on the extent of the rot and on how the board is made. A bargeboard with small areas of soft timber on an otherwise sound length can be repaired. The decayed wood is cut out, the cavity is treated and filled or pieced in with new timber, and the board is primed and repainted. That is common on decorative boards where the shape is worth keeping.

Replacement is the better answer when rot runs along a length, when the board has split through, or when several joints have opened. New boards are cut to length and fixed to sound timber, with joints placed so water cannot sit in them. Where the old board was carved or shaped, a joiner can copy the profile in matching timber so the gable keeps its outline.

If the old board is a flat plank, the choice of material is open: painted softwood, hardwood, or uPVC boards. Each has its own ageing pattern. Painted timber needs repainting at intervals but suits older buildings, while uPVC needs little upkeep but cannot copy a carved profile. For houses in conservation areas, check with B&NES planning before changing a board's material or profile.

One caution: on an older house, a board of cement-based sheet may not be timber at all. If the material looks grey, thin and brittle, read our guide on asbestos soffits before touching it.

Work at height, cost and the next step

Bargeboards rise with the gable, which often means working well above the ground. Scaffold or a tower is usually needed, and that is a real part of the cost. MyBuilder's 2026 guide puts scaffold at roughly £20 to £40 per square metre of access, and it reports fascia boards typically at £80 to £150 per metre and soffits at £100 to £180 per metre. Bargeboards are priced differently from either, since the length, the height and the amount of shaping all change the job. Your fixed quote follows the survey.

While the scaffold is up, it makes sense to deal with everything at the edge in one visit: the verge, the gable soffit, any cracked pointing at the head of the wall, and the end of the gutter. A blocked run at the corner can overflow onto the board and keep it permanently wet, so see our page on a blocked downpipe if staining shows below the gutter.

There is no charge for our survey, and the pictures we take show you the state of your own gable boards, from a tower where needed. Look in those pictures for soft timber at the foot of each board, where rain off the verge tends to sit longest. The rest of our roofline work is covered on the gutters, soffits and fascias hub.