Perished or missing window and door seals
What happens when window or door seals perish?
Window and door seals are designed to compress tightly when closed. When they shrink, harden or split, compression is lost and gaps form around the frame.
Why window and door seals deteriorate
Seals degrade due to:
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UV exposure
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Temperature changes
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Repeated opening and closing
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Age
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Over time they lose elasticity and begin to detach at corners or along frame edges.
How to tell if it’s the gasket or external sealant
Gasket failure usually causes draughts even in dry weather.
External sealant failure is more likely to cause water ingress during rain.
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Correct diagnosis prevents unnecessary work.
Why failed seals lead to draughts and leaks
Once compression is lost, cold air and moisture enter through micro gaps around the perimeter.
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This reduces energy efficiency and comfort.
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We carry out specialist window and door seal replacement tailored to the frame system.
What damage perished seals can cause
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Cold internal surfaces
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Increased heating bills
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Condensation build-up
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Occasional water ingress
Frequently asked questions
Is this different from external resealing?
Yes. Gaskets sit within the frame, not around it.
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Do all seals need replacing at once?
Not always. We assess condition before recommending full replacement.
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Is this a quick job?
In many cases, seal replacement is completed within an hour or two.
Recent local work -
