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Advice · Wrexham & North Wales

Fascias and Soffits: Repair, Clean or Replace?

It is one of the most common questions we get on jobs across Wrexham and the surrounding villages: are the boards along your roofline actually failing, or do they just look tired after a wet North Wales winter? The honest answer depends on what they are made of and what is going on underneath, so here is how to work it out before you spend a penny.

Published 15 July 2026

First, work out what you are looking at

Fascias are the boards fixed to the ends of your rafters, carrying the guttering. Soffits are the horizontal boards tucked underneath, closing off the gap between the wall and the gutter line. On most homes in this area they are either uPVC (plastic) or timber.

This matters because timber and plastic fail in completely different ways. Timber rots, plastic does not. So the material largely decides whether a clean will do or whether you are looking at replacement.

When a clean is genuinely enough

If your boards are uPVC and the marks are only on the surface, cleaning is usually all you need. Green algae, black streaks below the gutter and general grime are cosmetic. A wipe down with a soft brush, warm soapy water or a dedicated uPVC cleaner brings them back, and it is a job many homeowners can do themselves from a stable ladder.

Signs you need repair or replacement

The real test is what happens when you press the board. Timber that feels soft, spongy or crumbles is rotten, and rot spreads, so a clean simply hides the problem. On uPVC, cracks, warping or boards pulling away from the roofline mean the fixings or the timber behind have gone.

Watch for signs that water is getting behind the boards: peeling paint on timber, damp patches on the ceiling of the top floor, or birds and wasps getting into the roof space. In older Wrexham properties we often find the visible board is plastic but the original timber behind it was never removed and is quietly rotting.

Do not forget ventilation

Soffits are not just for looks. They usually carry vents that let air flow into your loft and stop condensation building up. If old timber soffits have been boarded over or painted shut, you can end up with damp and mould in the roof space even though the roof itself is sound. When we replace boards we fit continuous or circular soffit vents to keep that airflow moving, which matters a lot in our damp climate.

A rough idea of cost

Cleaning is the cheapest route by far, often under 100 pounds if you pay someone, or just your time if you do it yourself. Full fascia and soffit replacement on a typical terraced or semi in Wrexham tends to run from around 1,500 to 3,000 pounds depending on the length of the roofline, access, scaffolding and whether the timber behind needs replacing too.

Because access is the biggest variable, always get someone to look before quoting. A short honest inspection will tell you whether you are spending 80 pounds or several thousand, and that is worth far more than guessing from the ground.

Common Questions
How long should uPVC fascias and soffits last?

Good quality uPVC boards typically last 20 to 30 years or more. They rarely rot, so if yours are that age and still solid, cleaning rather than replacing is usually the sensible choice.

Can I just replace the fascia and leave the soffit?

Sometimes, but it is often a false economy. If one board has failed the others are usually the same age and condition, and doing them together saves a second lot of access and scaffolding costs.

Will pressure washing damage my boards?

It can. A high pressure jet can crack older uPVC, force water behind the boards and strip paint from timber, so a soft brush and cleaning solution is safer and just as effective for surface grime.

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