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uPVC Flush Sash window

Flush Sash

We specialise in flush sash windows here in Newtownards. The most attractive windows on the market, they bring together the old-fashioned look of timber & all the benefits of uPVC.

A fully timberweld jointed ‘timber alternative’- meaning the sash sits beautifully within the frame, providing a sleek, smooth exterior with a choice of beautiful finishes.

Double Rebated and Timber Welded, it’s the ideal timber alternative. It blends the clean lines and elegance of a pre-1932 timber window with modern thermal efficiency – and none of the ongoing maintenance.

Designed to complement character properties perfectly, as well as modern, architectural masterpieces, it grants the ultimate versatility and style.

The flush sash is glazed like a standard casement window – no bonding required. Resulting in less disruption during installation.


Frame Type

Ovolo type bead


28mm double or 36mm triple glazing, contact one of our team for more glazing options.


Choice of Georgian bars, Astragal bar and a wide choice of handles.


U-value above is for standard configuration

*Can achieve U-Values as low as 0.9


Manufactured using uPVC material. 

Add a pop of colour

From classic white to agate grey, the flush sash windows are available in a variety of colours and finishes to suit your property style. 

Foil outside and inside

Cream foil

White foil


Black Brown

7016 Grey

Foil outside / white inside

Anteak / White

Rosewood / White

Black Brown / White

7016 Grey / White

7038 Agate Grey / White

Flush sash window liniar
House with casement windows

Why Choose Us

Superior Quality

Trade installers across Ireland choose us because quality is key at Superior Trade Frames. We use high quality profiles so you can offer your customers only the best. 

Chosen by the Professionals

We work closely with trade installers, architects and builders across various domestic and commercial projects. We’ll do our best to help you choose the best systems for your job! 

Low U-Values

All our windows and doors exceed industry standards and we’re confident we manufacture to the lowest U-Values.