Casement windows

Casement windows are a common feature in many properties and can be opened and closed or fixed in place. Highly functional, they’re one window design that’s been around for centuries and will be around for many more! Unlike box sash windows, the casement frames are made from a solid piece of wood.

Casement Window Bay and Triple Casement Pirbright Road Southfields
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How casement windows work

Casement windows tend to either be: 

A casement (the part that sits in the frame) that’s made from 4 pieces of wood that have been joined together. Inside the frame there’s glass that’s hinged to the frame or;

A casement that doesn’t open because it’s been fixed shut. In this instance, each opening has hinges. However, having too many hinges isn’t a good thing because it can overcrowd the window.

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The history of casement windows

To the left is a sketch of a casement window from an old joinery and carpentry book published in 1902. Joiners who built period properties around London back then learned from books like these. 

While we may be in the 21st century, we pride ourselves on the fact our timber casement windows are made with the same features as those that were made 100 years ago. They also happen to incorporate some additional valuable features too! 

Materials

Wood choice 1: Sapele

Wood choice 1: Sapele

Sapele is a north African hardwood that’s part of the mahogany family. It looks beautiful and has incredible rot resistance. It takes years for any rot to set in, unlike softwood, which can start to rot in just 1 to 2 years. Read more here.
Wood choice 2: Accoya

Wood choice 2: Accoya

Accoya is a softwood that costs more than most expensive hard wood. It doesn’t absorb water in the way other wood does. It doesn’t rot due to the fact rot needs water to develop. Accoya isn’t affected by insect attacks either. Read more here.

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