DAMP GUYDAMP SPECIALIST · CUMBRIAFree survey
DAMP GUYDAMP SPECIALIST · CUMBRIA

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CAUSES, FIXES & WHEN TO WORRY

CONDENSATION
ON WINDOWS
IN CUMBRIAN HOMES.

Streaming windows every morning, puddles on the sill and black mould creeping around the frame? Here’s what’s going on and how to get on top of it.

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Written and reviewed by Damp Guy, damp and plastering specialists in Cumbria for 8 years ·

Inside, outside
or in between?

Where the condensation forms tells you a lot. Only one of these is a moisture problem in your home.

On the inside of the glass

Moisture from breathing, cooking, showers and drying clothes is meeting cold glass. This is the one to tackle, because the same moisture can settle on walls and cause mould.

Between the panes

Misting inside a double-glazed unit means its seal has failed. It isn’t caused by your home’s ventilation, and the sealed unit usually needs replacing by a glazier.

On the outside

Dew on the outside of modern glazing on a cold morning is normal. It’s actually a sign the glass is keeping the heat in.

Further reading +

What you can
do today.

Ways to cut condensation

  1. Keep trickle vents open, especially in bedrooms overnight.
  2. Wipe windows and sills each morning, and wring the cloth out into the sink.
  3. Dry washing outside or in a vented tumble dryer where you can.
  4. Put lids on pans and use the cooker hood or kitchen extractor.
  5. Keep the heating low and steady in cold weather rather than on and off.
  6. Leave a gap between furniture and outside walls so air can move.
  7. Use a dehumidifier as a stopgap while you get to the cause.

Signs of a bigger problem

  • Black mould on window reveals, frames or sills
  • Condensation or mould spreading onto walls and ceilings
  • Rotting timber sills or frames
  • Musty smells, or mould on clothes and furniture
  • Windows still streaming after you’ve tried the steps on the left

How we
help.

Look at the whole house

We look at where the moisture is coming from, how it’s getting out and which surfaces are cold enough for it to settle on. Windows are often just where it shows first.

Treat any mould

Mould around windows and on walls is treated, and any damaged plaster is repaired so the problem isn’t simply covered up.

Improve the ventilation

In a suitable home, a PIV system can help by gently bringing filtered air into the house and reducing the moisture that ends up on the glass. We check whether it suits your property first.

Condensation help
across north & west Cumbria.

Send your postcode to confirm availability, including nearby towns and villages.

Check availability

Carlisle & the north

Carlisle, Brampton, Longtown, Wigton

West Cumbria & the coast

Whitehaven, Workington, Maryport, Silloth, Aspatria, Egremont, Cleator Moor

Penrith & the northern Lakes

Penrith, Keswick, Cockermouth

Condensation on windows
FAQs.

Is condensation on windows normal?

A little on cold winter mornings, especially in bedrooms, is common. Windows that stream every day, puddles on sills and mould around frames suggest there’s more moisture in the air than your home is getting rid of.

Why is it worse in the bedroom?

We breathe out moisture all night, and bedrooms are often kept cool with the door and windows shut. By morning, that warm, damp air has met the cold glass. Opening trickle vents overnight helps.

Will new windows stop condensation?

New double glazing has warmer glass, so it often reduces condensation on the windows themselves. But if there’s still too much moisture in the air, it can settle on the next coldest surface instead, such as walls or corners. Ventilation needs to come with it.

Does a dehumidifier help?

Yes, as a stopgap. It removes moisture from the air in one room. For a lasting result, reduce the moisture you create and make sure your home can get rid of it.

Can PIV stop condensation on windows?

In a suitable home, PIV can make a real difference by diluting moist indoor air with filtered air from outside. It doesn’t fix leaks or failed window seals, and we check whether it suits your home before recommending it.

Is window condensation the same as damp?

It’s one type of damp. Condensation comes from moisture inside the home, while rising and penetrating damp come from outside the building. They need different fixes, which is why finding the cause matters.

HOW WE CAN HELP

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