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uPVC Window Gasket Types Explained

Gaskets are the quiet seals that keep weather out. Here's what they do and the types used.

What gaskets do

Gaskets are the rubber-like seals between the sash and frame that block air, water, and dust. They're what make a closed window airtight and weathertight.

What to know

Look for this

  • Seal against air, water, and dust
  • Continuous around the sash
  • Compressed by multi-point locking
  • Quality gaskets stay flexible for years
  • Key to sealing performance

Why it matters for your windows

Good gaskets, well fitted and compressed by proper locking, are central to a window's sealing — the difference between a window that keeps dust and rain out and one that leaks.

Questions

Frequently asked

What are uPVC window gaskets?

The rubber-like seals between sash and frame that block air, water, and dust, making a closed window airtight and weathertight.

Do gasket types matter?

Yes — quality gaskets stay flexible and seal for years; poor ones harden and leak. They're central to sealing performance.

How are gaskets kept sealed?

Multi-point locking compresses the sash against continuous gaskets all around.

From our range

What we make

uPVC Sliding Windows

Multi-track windows that need no swing space.

uPVC Casement Windows

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

uPVC Performance Systems

Double-glazed acoustic and thermal windows.

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