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Dear Editor, Bi-folding doors – why overlooked?

The Government’s Green Deal initiative will focus public awareness on energy efficiency in 2011 and 2012.

Our industry has done much to improve the performance of windows. But it has virtually ignored the contribution a bi-folding door can make to heat loss or heat gain. An energy efficient bi-folding door is a major potential contributor to reducing carbon emissions, and to saving homeowners’ money.

The reasons why its contribution has been

overlooked are plain: first generation PVC-U Bi-folds made use of bulky, inefficient door profile and are not up to today’s energy standards. Fortunately, Liniar’s Bi-Fold Plus was specifically designed to meet homeowners’ energy efficiency requirements.

With slimmer profiles and a greater glass area, it has far better, second generation thermal performance. Our Bi-Fold Plus is capable of achieving a class leading U-value of 1.3Wm/K. More than enough to keep homeowners happy.

There is not much point in selling A-rated windows or better, if you cannot match that with outstanding performance from bi-folding doors. Increasingly, homeowners are looking to cut their heating bills as well as reducing their carbon footprint.

Shouldn’t window companies get ready to benefit from the Government’s high profile initiative?

Adrian Redshaw, Design Director, Liniar Window Systems

Editor reply:

Point taken, Adrian. The Green Deal needs to include any product that meets both energy saving and green credentials criteria, especially products that are much in demand with home improvers – such as Bi-folding Doors.

Dear Editor,

I’d like to thank the Door and Hardware Federation (DHF), Secured by Design (SBD), Glass and Glazing Federation (GGF) and BSI for listening to some of the concerns we raised about the TS007 Kitemark security standard for replacement cylinders and associated security furniture.

We’re pleased the testing method has been revised to make it more robust, and that locks and cylinders will now have to be tested on both PVC-U and timber doors.

I understand the need to launch a new Kitemark soon: Police and politicians need to show the public that they have listened to their concerns for security. But the revisions still don’t address the key points.

At its core, the star rating system is confusing and the opportunity for mis-selling is great. Who is going to police the standard and ensure the correct combination of products is installed? The onus shouldn’t be on consumers to check that the cylinder has the new Kitemark, and if it is used in combination with additional security measures, meets the required three star rating.

Secondly, the new standard may suit window fabricators making new doors but it is hopeless for the retrofit market where the problem lies. New doors are well covered by PAS024. However, locksmiths and installers are asked to retrofit cylinders to improve the security of existing doors. Each installation requires a different approach and the locksmith or installer carrying out the work won’t know what type of door is in place or what locks, cylinders or security handles are on it. So they need individual cylinders that can to do the job on their own whatever the installation, and not ones that need to be shielded by additional security handles and guards.

If the threat of burglary is to be reduced through security measures then we need to introduce quickly a simplified, well targeted standard to supersede TS007, one that is more appropriate to the retrofit market, and one that is easier to sell and to police.

Yours sincerely Steve Stewart, Managing Director, ABS Secure


New dates have been confirmed for GlassBuild America: The Glass, Window & Door Expo.

The event will now take place from 12-14 September 2011 at the Georgia World Congress Center in Atlanta. The dates were changed to avoid conflicting with Labor Day weekend, a major holiday in the US calendar.

Denise Sheehan, Vice President of Industry Events at the National Glass Association, said, “We feel this change will provide a more cost effective trade show and a happier, more productive event for both exhibitors and attendees.”

More information on the event from


The 10th ROOFINDIA event will take place this year from 27-29 May at the Bombay Exhibition Centre, Mumbai, India.

India is the one of the fastest growing economies in the world and this event is Asia’s largest roofing and allied technologies event.

More information from



Write to: CLEARVIEW – DEAR EDITOR, FAO: Patricia Gwynnette, Office F1-F3, Holme Suite, Oaks Business Park, Oaks Lane, Barnsley S71 1HT

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