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Double Glazing Windows - Harrow, Pinner & Northwood

At Williams Windows we are all about the quality of products and service, that's why we use market leaders REHAU and Kömmerling. This enables us to offer a vast range of double glazing windows, suiting all kinds of property throughout Harrow, Pinner, Northwood and the surrounding areas.

Our range of 70mm casement windows means that chunky windows are a thing of the past. We provide quality, slim-line casements that look great. REHAU and Kömmerling 70mm systems are a popular choice for replacing traditional British timber casements due to the slim depth allowing for the replacement of 3” timber frames without a lot of making good.

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Today's new builds continue to favour traditional designs. To compliment this, we use a window system which can replicate the features of traditional joinery and sculptured sashes. To complete the authentic look we also use matching beading. However, in some cases a clean, modern style is more suited, making chamfered sashes the perfect choice.


  • ‘The service provided was of a high standard by a professional team who clearly knew what they were doing. We couldn’t be happier with our brand new conservatory. Thank you to all involved…’

  • ‘My new front door has added light into the hallway and brightened up the exterior of my home. Everyone comments on it when they first see it. I would not hesitate to recommend Williams Windows to anyone…’

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