Soft Wash

Cladding and fascia cleaning

uPVC fascias, soffits, gutters, composite and timber cladding cleaned of green film and black streaks with low-pressure soft washing. UK guide prices.

In short: Cladding and fascia cleaning uses low-pressure soft washing to remove green algae, black streaks and grime from uPVC fascias, soffits, gutters and composite or timber cladding. It is for homeowners, landlords and businesses whose roofline or cladding looks dull or stained. In the UK, cleaning the outside of fascias, soffits and gutters on a typical house usually costs £100 to £300.

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Cladding and fascia cleaning

White uPVC fascias and soffits are one of the first things to look tired on a house. A green film builds up on north-facing runs, and black streaks form where rainwater runs over the face of the gutters. Composite and timber cladding develops algae and grey weathering in a similar way, especially behind planting or close to the ground. Left alone, the film builds up year on year and becomes harder to shift.

These surfaces scratch, streak and, in the case of timber, raise grain easily under high pressure, and water forced behind cladding boards can cause problems. Soft washing applies a cleaning and biocide solution at low pressure, followed by a gentle rinse or brush where needed. For black gutter streaks, which are often a bonded film of pollution and carbon, a specific gutter cleaner and hand agitation are usually needed alongside the soft wash.

What is included

  • Low-pressure cleaning of uPVC fascias, soffits and bargeboards
  • Cleaning the outside faces of gutters and downpipes
  • Treatment of black gutter streaks with a suitable cleaner
  • Soft washing of composite, fibre cement and timber cladding
  • Rinsing of windows and frames below the work
  • Protection of planting and paving beneath
  • Check for damaged or loose roofline boards while working

Who it is for

  • Houses with green or grey uPVC fascias, soffits and gutters
  • Black streaking on the outside of gutters
  • Composite or fibre cement cladding with algae
  • Timber cladding that is green but otherwise sound
  • Blocks of flats and commercial buildings with dull cladding panels

How much does it cost?

As a guide, cleaning the outside of fascias, soffits and gutters usually costs £100 to £300 for a typical house, with cladding priced by area at around £4 to £8 per m² depending on height and access. See our full cost guide.

How it works

How cladding and fascia cleaning works, step by step
  1. Check the materials

    The cladding and roofline materials are identified, as uPVC, timber and composite each need a different approach.

  2. Protect below

    Plants, paving and windows below the work are wetted and protected from run-off.

  3. Clean at low pressure

    The solution is applied, left to work, and agitated by hand or brush on stubborn streaks.

  4. Rinse and inspect

    Surfaces are rinsed thoroughly and checked for any remaining marks from ground level.

Cladding and fascia cleaning: FAQs

Can black streaks on gutters be removed?

Usually, yes, but they often need more than a biocide. Black streaks, sometimes called tiger stripes, are a film of pollution and carbon that bonds to the plastic as rainwater runs over it. A dedicated uPVC cleaner and hand agitation normally lifts them. Very old, weathered uPVC can be permanently discoloured, which no cleaning will fully reverse.

Is soft washing safe on timber cladding?

It can be, with the right product and care. Timber is more sensitive than uPVC: strong solutions can lighten or dry out the surface, and high pressure raises the grain. A milder solution is used and the cladding is rinsed thoroughly. Treated or stained timber may need its finish refreshed afterwards to look its best.

Do you clean the inside of the gutters as well?

Fascia and soffit cleaning covers the outside faces. Clearing debris from inside gutters is a separate task, though it is often done at the same visit. If your gutters are overflowing or have plants growing in them, mention it so it can be included in the price.

Can fire-rated or ACM cladding be soft washed?

External cladding on taller buildings may have specific maintenance requirements from the manufacturer or the building's fire safety documentation. Cleaning methods and products should be checked against those before work starts. For blocks of flats, managing agents can usually provide the relevant information.

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Last updated 6 November 2026