Our Services

Window Gasket Replacement

Replacement of worn, damaged or deteriorated window gaskets.

Window gaskets and seals help a window close against weather and draughts. When they are damaged, missing or compressed, a targeted replacement may restore the local seal where the frame and window system are suitable.

We check the accessible gasket, frame and surrounding condition before recommending work. A gasket is only one part of how a window, room and ventilation strategy perform.

When this service may help

Local draughts around an opening sash
Visible cracked, loose or missing gasket material
A poor local weather seal
Concern about water entering around appropriate accessible components

What we look at / do

Accessible gasket and seal condition
Frame, sash and visible surrounding condition
Whether replacement is suitable for the existing window system
Obvious issues that may need a different repair route

How the service works

1
Inspect the local seal
We assess the accessible gasket and related window condition.
2
Confirm suitability
We explain whether a replacement is practical for that system.
3
Replace the gasket
Suitable sections are renewed as agreed.
4
Check the result
We check the immediate fit and explain any separate concerns.

What's included

Assessment of existing window gaskets
Identification of suitable replacement gaskets
Removal of worn or damaged gaskets
Installation of replacement gaskets
Inspection of the finished seal
Scaffolding identified separately on the quotation where required

What you'll receive

Assessment of the affected opening
Agreed local gasket replacement scope
Practical advice on visible related defects
A quotation where further work is appropriate

Pricing

What this costs

Treatment guide prices

Window gasket replacement
Typical guide range
£114.00–£180.00 inc VAT / Item
Per window.
Usually includes: Replacement of the gasket/seal on one window.
What can change the price: Assumes a straightforward, accessible window and a serviceable frame. Unusual or access-heavy work may differ.
Last reviewed 23 August 2026

Development guide prices only. Final prices depend on the property, access and scope required and will be confirmed in writing.

See full damp & mould pricing guide

Important to know

Gasket replacement is not a universal condensation cure. Condensation can relate to indoor moisture, ventilation, surface temperature, glazing condition and other building factors. Any work that changes airtightness should be considered alongside adequate ventilation.