UPVC Sliding Sash Window

Vertical sliding sash windows offer slim sight lines, a large glass area, a wide range of design options and flexible solutions for period properties or new build.

This window style originated in the 17th century and continues to offer elegant glazed opening solutions with optimum ventilation and practicality guaranteed.

Our window is modern, secure, virtually maintenance free and manufactured from high impact, durable uPVC. uPVC box sash windows authentically replicate the look of timber but are virtually maintenance free.

The thermal properties of uPVC are excellent and these windows can be supplied in a wide range of finishes. From six feet away it is extremely difficult to tell if the window is timber or uPVC. Mechanically jointed windows now available on request.

Key Features
  • Virtually maintenance free
  • Will not stick, rot or warp
  • 128mm front to back frame depth
  • 150mm integral cill
  • Spiral sprung balance mechanism
  • Key locking cams with suited sash lifts and ring pulls
  • Fitted with draft excluding woolpile and seals
  • Low emissivity 24mm double glazed argon filled sealed units
  • Window energy rating of C as standard
  • All frames made to measure
  • Max size w: 1.6m h: 3.0m
  • Maintenance Free
  • Any RAL colour
  • Woodgrain & Smooth Effect
Get a quote now >

A little time and care with your choice of colour are advised and your selection should be influenced by the style of your property, surrounding architecture or your others windows and doors.

Colour options:

White uPVC

Grained Finishes

White ash both sides; Cream ash both sides; Golden oak both sides; Golden oak out / white uPVC in; Rosewood both sides; Rosewood out / white uPVC in


Or choose from a wide range of RAL colours


24mm (4-16-4) double glazed sealed units
Planitherm Total Plus Low Emissivity, soft coat glass
Argon filled units
Warm Edge Spacer (Black or Grey)
U value of 1.4 on A rated

Must be installed in accordance with Glass and Glazing Federation Guidelines
All profiles are extruded to BS 7413
150mm or 210mm integral cill
Run-through or plant-on horns
White, black or silver spacer bar
Deep bottom rail
Integral Georgian bar to double glazed unit 18mm or 25mm width
Traditional face fixed Georgian bar to glazed unit 22mm or 30mm width
Our bespoke spring loaded travel restrictor
Tilt-in facility on both sashes with IDAW bespoke tilt latch knobs
Arched head frames
Trickle ventilator
Fire Egress
Product complies with BSEN 12608
Water Resistance 200 pa
Wind Resistance 1600 pa
Air Permeability 600 pa
Product Reference
Fully welded outerframe and sash
Mechanically jointed deep bottom rail option
128mm outerframe with integral cill
Black gasket on bead. Grey woolpile.
IDAW bespoke ‘Hook and Claw’ cam catches and ring pulls
Spiral spring balance mechanism
System Parameters
Maximum Width 1,600mm
Maximum Height 3,000mm
10 year warranty on all PVCu profiles
10 year warranty on spiral balances
1 year warranty on hardware and accessories
Window Energy Rating
Window Energy Rating A can be achieved
Hardware & Accessories
Cam catch handles and lift pulls available in;
white, antique gold, pewter, chrome and satin


We can offer 'Secure by Design' on our window and door ranges.

Energy Efficient

Energy Efficient

U Values from 0.7, A* Energy Rated, and environmentally conscious products.



Many of our products comply with FSC, PAS 23/24, CE Marking, and are tested by BM Trada.

Project Management

Project Management

Professional advice and guidance for all building projects.

Andrew James


"My experience with International Doors and Windows was excellent. They were competitive on price and provided top quality products and services."

© 2020 International Doors & Windows | Website by Simplicity Marketing