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NorthwestWindow Co.
Stone cottage with sage green flush sash windows

Windows

Flush sash windows

The flat, elegant face of traditional timber joinery with the warmth, security and easy upkeep of a modern uPVC window.

Windows

Character without the upkeep

On a standard casement the opening sash sits proud of the frame. On a flush sash window it closes level with it, giving one flat, uninterrupted face. It is how timber windows were made for a couple of centuries, and it is the detail that makes a replacement window look as though it belongs on a period home.

Paired with a heritage colour or a woodgrain finish, flush sash frames are a favourite for cottages, farmhouses, Victorian and Edwardian terraces and new homes designed to look established from the day they are finished.

Period proportions

A flat external face and slim, even sightlines that echo original timber joinery.

Heritage colours

Chartwell Green, Cream, Agate Grey and woodgrain finishes that suit stone and brick.

Modern performance

A-rated double glazing as standard with triple glazing available.

Quietly secure

Multi-point locking and internal glazing, with none of the hardware on show from outside.

Stone-built house with golden oak woodgrain windows and matching front door

The detail that changes everything

Stand across the road from a house with flush windows and you will notice the difference before you can say what it is. The frames read as a single plane, shadows are finer and the glass looks larger. It is a quieter, more considered window.

We can add Georgian or astragal bars to divide the glass into smaller panes, and match traditional details such as a deeper bottom rail, so new windows follow the pattern of the originals.

A sensible choice for sensitive settings

Flush sash windows are often chosen for homes in conservation areas and for properties where the original timber windows have reached the end of their life. Planning rules vary from one council to the next, so if your home is listed or in a conservation area, check with your local planning authority before you order. We are happy to supply drawings and specifications to support an application.

Your choices

Made to order, down to the details

Popular finishes

  • Chartwell Green
  • Cream
  • Agate Grey
  • Anthracite Grey
  • Golden Oak
  • Rosewood
  • Brilliant White

Colours

Eight colours, inside and out

Choose one colour throughout, or a colour for the street and white for indoors. Woodgrain finishes have a lightly textured surface.

  • Brilliant White

  • Cream

  • Chartwell Green

  • Agate Grey

  • Anthracite Grey

  • Black Brown

  • Golden Oak

  • Rosewood

Hardware

Handles in five finishes

Every opening window has a key-locking handle. Pick the finish that suits the frame and the room.

  • White

  • Black

  • Polished Chrome

  • Gold

  • Satin

Specification

The details, in full

Typical specification. We confirm the exact details for your order on the quotation.

Flush sash windows specification
ProfileEurocell Eurologik 70mm with flush-fitting sash
Glazing28mm argon-filled double glazing as standard; 36mm triple glazing optional
Energy ratingA as standard
SecurityMulti-point locking, key-locking handles, internal glazing beads
FinishesSolid colours and woodgrain foils, single or dual colour
OptionsGeorgian and astragal bars, obscure and toughened glass, trickle vents, cills
Guarantee10 years on frames, 5 years on sealed units, 2 years on hardware

Questions

Good things to ask

Straight answers to the questions we hear most about this product.

What is the difference between a flush sash and a standard casement?

Only the way the opening part meets the frame. On a standard casement the sash overlaps the frame and stands slightly proud. On a flush sash it sits inside the frame and closes level with it. The glass, locking and thermal performance are equivalent.

Will flush windows be accepted in a conservation area?

They often are, because they closely resemble traditional timber windows, but the decision rests with your local planning authority and policies differ between councils. We recommend asking before you order, and we can provide product details for your application.

Do woodgrain finishes fade or peel?

The woodgrain is a durable foil bonded to the profile during manufacture, designed for decades of British weather. It needs no staining or varnishing, just an occasional wash.

Get a price for flush sash windows

Tell us what you have in mind and we will come back with a clear, itemised quote. No pressure and no sales visit you did not ask for.