Flush Sash Windows from Clarks Glass

Clarks Glass flush sash windows

Designed to replicate 19th century flush sash timber windows. It can be considered for use in areas of conservation due to its authentic appearance.

This authentic design is also appealing to any homeowner who wants a top end luxury window brand.  It can accommodate 28mm or 40mm triple glazing with market-leading acoustic performance. It achieved one of the highest classifications on weather test due to its robust design. It is hand finished to the same high standard of TS Collection windows.

Flush sash windows from Clarks Glass

The Flush Sash system is crafted from modern, weatherproof PVCu which - unlike traditional timber windows - will never need sanding or repainting and will never rot, split or swell. These low maintenance windows will keep your home looking its best for years to come, with no more work than an occasional wipe with a damp cloth.


Flush Sash can be specified in bespoke sizes to suit the windows of your home, whether it’s a tall townhouse or a quaint and cosy cottage. Authentic astragal bars can also be fitted within your windows to give the “lattice” effect often found in historic homes.

Heritage houses can often be associated with damp and draughty living conditions. Choosing the Flush Sash for your home your home can solve these problems and more. Energy-efficient, high-spec PVCu frames will keep your home significantly warmer and could dramatically lower your heating bills.  These features also prevent condensation forming and will reduce unwanted outdoor noise.

Security from Clarks Glass flush sash Windows

Clarks Glass windows are tested to the highest standards and conform to PAS 23. Our windows are fitted with multipoint locking and hinge claws, offering maximum security and protection. They are also manufactured with internal glazed beading, ensuring that entry cannot be gained from the outside of your property.

Our Flush sash windows colour range

As well smooth white, our flush sash windows are available with a foil finish, which is grained and has the appearance of a wood grained product.

Please see below for the colours that are available.

White woodgrain


Beck Brown

Golden Oak




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