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Timber

Wet Rot in Banstead

Localised timber decay caused by sustained wetting — far more common than dry rot and usually simpler to resolve.

Wet rot is the general term for several fungi, most commonly Coniophora puteana, that decay timber kept persistently wet. Unlike dry rot it does not spread into dry material, so damage remains confined to the wetted area. That makes it less alarming but no less important — decayed joist ends, window sills and door frames lose structural strength and let more water in.

The vulnerable places in Surrey homes are predictable: the bottom rails of painted timber windows, external door thresholds, bay window sills, joist ends built into damp external walls and timber in poorly ventilated sub-floor voids. We deal with all of these, prioritising repair of sound timber over wholesale replacement wherever it is practical.

Common signs

  • Soft, spongy timber that gives when pressed with a screwdriver
  • Dark brown or black discolouration and cracking along the grain
  • Flaking paint on window frames with soft wood underneath
  • Springy floorboards near an external wall
  • A damp, earthy smell in a sub-floor void

Likely causes

  • Leaking gutters and downpipes soaking adjacent joinery
  • Failed window and door seals and defective sills
  • Penetrating damp at joist bearing positions
  • Condensation in unventilated roof and floor voids
  • Splash-back from hard landscaping against timber elements

Ask about wet rot

Tell us what you are seeing and we will call you back with honest advice.

Prefer to talk? Call 020 8239 3335 or 07730 982359.

Our method

How we diagnose and resolve the problem

01

Identify the water source

We find and correct the leak, drainage fault or ventilation deficiency causing the wetting.

02

Assess the timber

Each element is probed and tested so sound timber is kept and only decayed sections removed.

03

Repair or replace

Resin repairs, spliced sections or full replacement in pre-treated timber depending on the element and its loading.

04

Protect and finish

Preservative treatment, isolation from damp masonry and a durable paint or stain finish.

Because wet rot does not spread through masonry, honest contractors keep the works small. We will always show you the affected timber before cutting anything out.

Questions

Wet Rot FAQs

How do I tell wet rot from dry rot?

Wet rot stays in wet timber and lacks the white mycelium strands and rust-red spore dust typical of dry rot. We confirm on site.

Can rotten window sills be repaired?

Frequently yes, with spliced timber or resin repair systems, which is far cheaper than replacing an entire frame.

Do you treat the surrounding timber?

We apply preservative to adjacent sound timber as a precaution once the moisture source is removed.

Need help with wet rot?

Book an independent survey and get a written answer — including if no damp proofing is needed.

Call now
SBC House, Restmor Way, Wallington, SM6 7AH