Established over 35 years ago, John Williams is one of the largest home improvement companies in North Wales and the North West of England.

We are specialists in the design manufacture and installation of high quality double glazed products. Including Windows, Doors and Conservatories.

Sash windows - Product Overview

Our range of Sash pvc windows are manufactured in either white, wood-look Mahogany or Light Oak. Or dual-look - with Mahogany or Oak wood-look outside and white on the inside.