Slim double glazed units in sash windows

About Us

Slenderpane slim double-glazed units are differenty to standard double-glazed units. Manufactured to order for trade customers, the units are handmade in Haddenham, Buckinghamshire and incorporate the latest technology including black, white or grey, warm edge’ super spacers.

As a result when they are glazed into windows or doors visually, they are virtually impossible to distinguish from single-glazing, but produce much lower heat loss values to comply with current building regulations.

When refurbishing sash or casement windows the aim should be to retain the elegant appearance of single glazing whilst enhancing thermal and sound insulation.

Slenderpane's slim double glazed unit workshop

BSI Certification

Slenderpane insulated glass units meet BSI standard BS EN 1279-3:2002.

Slenderpane has been providing slim double glazed units since 2011 and as a leading UK provider take the industry standards extremely seriously. Having worked with Edgetech, who themselves are the leading manufacturer of warm edge technology, our Heritage Sealed Units have been tested and achieved full accreditation in compliance with EN1279 parts 2 & 3.

Please view the attached certificates for the Insulated Glass Units and Gas Specification.

Mr Hothersall, Somerset

"I thought I would get in touch following installation of your glass by Chris of Sash Window Doctor, Portland, Devon. We never expected huge differences in temperature with this type of slim glazed units so only gave Chris a couple of windows to see if your website claims stand up. The honest answer is yes!"

"I’ve been very impressed so far and with a 7mm sight line, your 10 year guarantee it gives me confidence, so much so I’ve asked him to do several more windows. I’m sure you will look after him, and I’m grateful that both he and your company exist to keep older buildings going and not simply rip out perfectly good wooden frames etc. well done!"

David George-Powell, Buckinghamshire

"I have received the units . Just like to say I am very pleased with the quality of your units they are very well made."

"I have seen a lot of units , I have been around the glass industry all my life. My dad owned two glass shops and was in the business for 61 years."

"The packing crate was a bit damaged but I think there is no damage . We used to put a glass fragile sticker on , the delivery drivers seem to understand that better. He thought it was a machine. Thanks for your speedy service hope to deal with you in the future."

Bobby, Berkshire

"Thank you for the glass that was delivered today. Can I just say your service is amazing and the packaging ezxeptional. Please pass my thanks to Ralph also."

Contact Details

Slenderpane Ltd
Units 1-5 Alexander House
Thame Road Industrial Estate
Thame Road
Haddenham
Bucks
HP17 8BY

Telephone: 01844 292779
Fax: 01844 292990
Email: sales@slenderpane.com

Social Media

Opening Hours

Monday - Thursday: 8.30am - 5.00pm
Friday: 8.30am - 4.00pm
Saturday, Sunday & Bank Holidays: Closed

Slenderpane's Workshop Showroom visits for Trade customers are by appointment only.

We are proud to be sponsors of the Florence Nightingale Hospice Charity