J. S. POSTLETHWAITE
We are a family firm, manufacturers of spectus PVCu windows, doors and conservatories,for trade and retail, double glazed or single glazed in white, mahogany, oak, sherwood oak, and woodgrain on white. Fascia and soffits and variety of trimms.
Timber products also available.
Spectus PVCu Profile
Double Glazed Units
Manufacture
Products

Spectus PVCu profile is manufactured in 62mm and 70mm sections.
Carry a 10 Year Manufacturers Guarantee.
Available in:
- White
- Mahogany
- Sherwood Oak
- Maghogany on white
- Sherwood oak on white
All PVCu woodgrains are laminates.
Profile complies to:
- BS 5750: Part 2: Quality Assurance, ISO 9002, EN 29002 and BSI Registration.
- BS 6375: Part 1: Weathering Performance.
- BS 7412: Specification for Plastic Windows made from PVCu extruded hollow profile.
- BS 7413: Specification for White PVCu extruded hollow profiles with heat welded corner joints for plastic windows - impact modified materials.
DOUBLE GLAZED UNITS
Units are British Standard Kitemark B.S. 5713.
Carry a 5 Year Guarantee.
Toughened safety in low level glazing and doors.
Options of glazing:
- 18mm, 20mm, 24mm and 28mm double glazed.
- 4mm or 6mm single glazed.
Clear and obscure glass range.

Range of bevel, georgian, leaded and coloured designs.
Individual designs can be produced to match existing glass.
MANUFACTURE
Constructed at our factory.
All frames reinforced as required with aluminium or galvanised steel.
All welded joints.
Casement windows glazed with security glazing tape.
Night venting locking handles on windows as standard.
5 point door locks with dead bolt on doors as standard.
Handles and letterbox colour options = White, Gold effect, Silver anodised, Black.
PRODUCTS
WINDOWS
EXTERNAL DOORS
INTERNAL DOORS
PORCHES/CONSERVATORIES
FASCIA AND SOFFITS
TIMBER PRODUCTS
For further information, please contact us at the address below:
J. S. Postlethwaite
Warwick Street Workshop
Barrow In Furness
Cumbria
LA13 9PH
Opening hours: Monday - Friday 9.00am - 5.00pm
Tel/Fax No: 01229 823322
E-mail:mail@jspwindows.fsnet.co.uk
Designed by Karen Leece