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Spec Guide

Window Gaskets & Seals: Why They Matter

Gaskets are the unglamorous part that does much of the real work. Here's why the rubber seals around your window matter more than they look.

What gaskets do

Gaskets are the flexible seals between sash and frame. When the window closes, they compress to block the gaps that dust, noise, and rain would otherwise pass through.

Why quality and fit matter

A good gasket seals continuously all round and stays supple for years. A poor or badly-fitted one leaves gaps or hardens over time, which is when drafts, dust, and noise creep back in.

Care

Gaskets need almost nothing — a wipe when you clean the window keeps them clean and supple. If one ages or shifts after many years, it can be reseated or replaced without touching the frame.

Questions

Frequently asked

What do window gaskets do?

They're the rubber seals between sash and frame that compress when the window closes, blocking the gaps that dust, noise, and rain pass through.

What happens when gaskets fail?

Drafts, dust, and noise creep back in. A shifted or aged gasket can be reseated or replaced without disturbing the frame.

Do gaskets need maintenance?

Almost none — a wipe when cleaning keeps them supple. Replacement is only needed after many years, if at all.

From our range

Products that fit the bill

uPVC Performance Systems

Double-glazed acoustic and thermal windows.

uPVC Casement Windows

Side-hung sashes that open wide for full airflow and the tightest seal.

uPVC Sliding Windows

Multi-track windows that need no swing space.

Related Guides

You might also need

Related guides covering this topic from other angles — different products, applications, or contexts.

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