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Surrey · TW16

Condensation diagnosis and fixes in Sunbury-on-Thames

We cover Sunbury-on-Thames and the wider Surrey area for condensation diagnosis and fixes. In short, we work out whether it's condensation or a leak, then fix the cause — ventilation, kerb or glass — and you know the price before any work begins.

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In Sunbury-on-Thames, as everywhere, condensation forms when warm, humid air meets a cold surface — and a roof lantern is the coldest surface in many kitchens. Send photos and we'll tell you what we think has failed.

Condensation droplets on the inside of roof lantern glass on a cold morning

What you might be seeing

  • Drips after cooking, showers or drying clothes
  • Black mould at the base of the lantern lining
  • Wet window sills elsewhere in the house too

Why it happens

High humidity

Cooking, kettles, showers, drying washing and people all add moisture to the air.

Poor ventilation

Without trickle vents, extraction or an opening vent, moist air has nowhere to go.

About Sunbury-on-Thames and the TW16 area

Even in drier areas, one heavy downpour with blocked eaves is enough to overflow a lantern indoors. Clearing the eaves channel is the simplest prevention there is.

From Guildford to Sunbury-on-Thames is roughly 13 miles — all part of the Surrey area we cover.

If you're just outside Sunbury-on-Thames, we also cover Walton-on-Thames (1 mile), Hampton (2 miles), Hanworth (3 miles).

What should you expect to pay in Sunbury-on-Thames?

Guide price, per visit£145–£495 ex VAT£174–£594 inc VAT

Typical range: £145–£495 ex VAT, which is £174–£594 with VAT, per visit. Towers or scaffold, where needed, are priced into the quote. Your fixed price is confirmed in writing before any work starts.

Do you need permission in England?

In England, like-for-like repairs to a roof lantern don't usually involve building control. A full replacement or a bigger opening is controlled under the Building Regulations 2010, so we set out the route in writing first. Listed buildings need listed building consent from the local council for alterations, and conservation areas can have extra controls; like-for-like repairs are treated differently from changes, so check with the council's conservation officer first.

How does it work?

  1. Send photosWhatsApp or upload a few photos and tell us when it leaks.
  2. Guide priceWe reply with a guide price and whether a visit is needed.
  3. Fixed price in writingYou approve the price and the date before anything starts.
  4. Repair and testWe fix what's failed, water-test where it matters, and send photos.

Condensation diagnosis and fixes in Sunbury-on-Thames: questions

Can you repair a lantern someone else installed in Sunbury-on-Thames?

Yes. We repair lanterns whoever fitted them. If yours is still under the installer's warranty, contact them first so you don't affect it.

Which places near Sunbury-on-Thames do you cover?

As well as Sunbury-on-Thames, we cover nearby Walton-on-Thames, Hampton, Hanworth, Ashford, Surrey and the rest of Surrey.

What does a condensation visit cost?

Diagnosis visits start from £145 ex VAT. Any fixes are priced separately and confirmed in writing before work starts.

Is condensation in a lantern normal?

Occasional light condensation on very cold mornings can be. Regular dripping isn't, and can damage linings and cause mould.

Other lantern repairs in Sunbury-on-Thames

Condensation diagnosis and fixes near Sunbury-on-Thames

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