46 INSULATION & ENERGY EFFICIENCY
Golden age for builders
HALF THE HOMES IN THE UK HAVE INSUFFICIENT LEVELS OF INSULATION AND IT IS ESTIMATED THAT UN-INSULATED ROOFS ALONE ACCOUNT FOR A QUARTER OF HEAT LOST FROM A HOME.
N
ot surprisingly it is the nation’s existing housing stock which represents the more important challenge to specifiers
as such homes are typically very energy inefficient by comparison. TLX Gold is a revolutionary two-in-one product which insulates and is as easy to install as a standard roofing tile underlay.
It is a unique breathable multi-foil and roofing membrane which delivers a less intrusive, energy improvement. The product is ideal where a roofing membrane is being replaced (there is no need to raise the roofing line with TLX Gold) and is helping in instances where Building Control is currently struggling to apply paragraph 54 (renovation of thermal elements) of Building Regulations 2000 Part L1B.
Paragraph 54 requires that when more than 25 percent of a roof is to be renovated then its
thermal performance must also be upgraded to the standard outlined (Table 5, upgrading retained thermal elements). However under Paragraph 55 if such an upgrade is technically or functionally impossible or won’t achieve a simple payback of 15 years or less then the upgrade should be to the best standard that would achieve these criteria.
TLX Gold provides the necessary upgrade to comply and it delivers thermal performance, especially where there are challenges of access, available headroom or a need to hold onto valuable storage space within the loft.
It acts as a high thermal barrier and consists of a seven layer composite including a top layer of high performance breather membrane, combined with PET wadding, interleaved with reflective films. A bottom layer of reflective film reflects infra-red rays back into the living space.
APPLICATIONS
In Huddersfield, Kirklees Council piloted TLX Gold on the refurbishment of Golcar library. The library’s existing roof structure was lath and plaster with heavy, irregular slates - the lower courses taller than the upper. TLX Gold allowed the roofline to be maintained and without the need to counter batten or strip the whole roof refurbishment took half the time to complete.
A City council in the North of England specified TLX Gold for a project involving re-roofing a terraced row with existing rooms in the roof. Here TLX Gold was simply installed across the rafters in one application, instead of cutting rigid insulation to fit between the rafters and then installing a breather membrane across the top.
For Hyde Housing Association’s Retrofit and Replicate scheme TLX Gold was installed to the underside of existing rafters, acting as a secondary underlay underpinning existing damaged roofing felt and keeping the space clean and useable.
A project to restore London’s 19th Century Crossness Pumping Station, an outstanding example of Victorian engineering used more than 2,000 square metres of TLX Gold for the renovation of three large roofs. TLX Gold was chosen as it offered maximum insulation value with minimum alteration to the profile of the roof. Many of the alternatives available would have required modifications to the inside or outside profile of the roof which wasn’t an option in this instance.
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It does not require access to the loft space to be installed and any existing plasterwork is not disturbed while carrying out the work. The tiles are simply removed and the product installed in place of a standard roof membrane prior to re-roofing. Due to its unique breathability, TLX Gold does not need a ventilated air gap or a vapour barrier on the warm side of a roof.
The TLX range is tried and tested and Web Dynamics’ technical team can answer queries concerning specification or installation and provide thermal calculations where necessary. For further information visit
www.webdynamics.co.uk Web Dynamics, Moss Lane, Blackrod, Bolton, Lancashire, BL6 5JB T: 01204 674730 E:
tlx@webdynamics.co.uk
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