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Extra UPVC Frame Extenders

A frame extender allows to increase the thickness of your window/door at any side. Great for properties with deep plaster, render or tiles over tiles. 25mm or 40mm extensions available.

Some fitters buy extenders as a precaution, for example where the window opening has not been built yet. Extenders can be modified to accommodate inconsistent side walls.

Extenders simply clip or slide on the window profile as you can see on the video.

Extender options


Length mm
  Frame Extender price
All prices include VAT
extender diagram
Frame Extender Preview
chosen extender example photo
Frame Extender Preview
Click to choose your colour, or click on the zoom icon to see it up close.
Disclaimer: We cannot guarantee to match existing colours.
For a colour match, please email us with your address for a free swatch.

Flat White, RAL 9016Golden Oak woodgrainGolden Oak woodgrain with flat White insideRosewood woodgrainRosewood woodgrain with flat White insideAnthracite-Grey grained, RAL 7016Anthracite-Grey grained, RAL 7016 with flat White insideBlack-Ash grained, RAL 8022Black-Ash grained, RAL 8022 with flat White insideAnthracite-Grey matt (smooth), RAL 7016Anthracite-Grey matt (smooth), RAL 7016 with flat White insideWhite grained for a superior look, RAL 9010White grained for a superior look, RAL 9010 with flat White insideClassic Cream grained, RAL 9001Classic Cream grained, RAL 9001 with flat White insideChartwell Green grained, RAL 6021Chartwell Green grained, RAL 6021 with flat White insideIrish Oak woodgrainIrish Oak woodgrain with flat White insideAgate Grey grained, RAL 7038 with flat White insideBlack matt (smooth), RAL 8022 with flat White inside