Roof Insulation
TLX Roof Insulation
TLX Gold Insulating Breather Membrane is the only product of its type with BBA certification. In just a few steps this unique product improves the thermal value of your roof without a risk of condensation and with little or no change to the roof height.
TLX Gold has been designed for today’s roofer. Whether it’s a roof refurbishment or new build project it improves thermal performance and eliminates the risk of condensation, it vents moisture like a breather membrane and yet insulates like non-breathable PIR board. TLX Gold is Sd intelligent (the more moisture present, the more it breathes) which is why there’s no condensation risk, even without a vapour barrier.
TLX Gold has now been used in over 30,000 roofs in the UK and is fully BBA certified and endorsed by the LABC.
TLX Gold comes with a product performance guarantee, is fast to fit, and many solutions do not need to remove existing insulation. We will provide you with solutions that have a guaranteed U-value, condensation risk assessment and an estimate of payback calculations.
Condensation & U value
All our standard TLX Gold solutions come with guaranteed U-value calculations and condensation risk analysis.
U Values
The temperature inside most houses is maintained at a comfortable level of around 20°C in living areas and 17°C in bedrooms. In the UK, the outside temperature is generally lower than this, especially in the winter. Heat flows from the warmer interior of the house, through the fabric of the building, to the outside. The U value expresses the rate at which heat is lost through a part of the house – such as roof, walls or windows. The U-value is expressed in units of Watts of power for every square metre of roof and for every degree temperature difference between the inside and the outside, or W/m2.K.
Part L1B 2010 requires a renovated roof to have a U-value of 0.18 W/m2.K. If the roof has an area of 70 square metres, and the temperatures inside and outside are 17 and 5°C, then the rate of heat loss through that roof is:
0.18 × 70 × (17 – 5) = 151 Watts
The U value of a roof is calculated by breaking the roof structure down into separate layers – such as plasterboard, insulation, rafters and underlay. The thermal resistance of each component is added together. Any materials of high thermal conductivity, such as timber rafters, form a cold bridge through the structure, and must be accounted for in the calculation, as must fixings and any poorly fitted insulation. The inverse of the total thermal resistance of the roof, plus allowance, gives the U-value for that roof structure. Examples of U-value calculations are shown in the TLX Gold solutions.
All TLX Gold U-value calculations are carried out according to BS EN ISO 6946
Condensation Risk
In general, the water vapour pressure inside the house is also greater than the vapour pressure outside. As well as heat trying to escape the building, so too water vapour tries to escape through the building fabric to the outside. The main mechanism by which water vapour is eliminated is through adequate ventilation. However, vapour will also try to diffuse through the walls and roof.
TLX Gold alters the temperature gradient across the insulation so that condensation is less likely to form in the air gap above the PIR or mineral wool, and ensures that even if condensation should occur then it is able to evaporate through the breathable TLX Gold.
Insurance & Certification
These days there are few guarantees that don’t come with a page full of small print so we think you will like our product assurance pledge.
Whether you are a builder, roofer or homeowner we keep our promise simple and provide you with peace of mind where you need it most.
specification and technical
Reassurance for roofers
As a roofer you want to know your product choice is fit for purpose and will deliver to required Building Regulations.
With TLX Gold you can tick that box. Tested to demanding British and European standards, TLX Gold achieved a BBA certificate in 2015.
All TLX Gold compliant solutions have also achieved LABC Registered Details. Registered systems for TLX Gold help speed up the building regulation process by sharing technical details and recognising Building Control assessments made by others in the LABC network.
TLX Gold, TLX Silver & UV membranes are all guaranteed for 25 years. This means is that that not only does TLX Gold deliver on product performance, but we also guarantee our U-value and condensation risk calculations. roof insulation.
Reassurance for householders
Supported by the building industry, retail and consumer protection organisations, TrustMark has the largest database of accredited tradesmen in the country and as a member we support you by only recommending reliable tradesmen and demonstrating that we require high standards of installation from them.
Our products are also backed by the NFRC (National Federation of Roofing Contractors) and we only recommend the installation of our products by NFRC and TrustMark approved roofers. NFRC and TrustMark approved roofers offer a warranty on their work which will also honour a roofer’s guarantee in the event that they cease to trade.
Our product assurance pledge which includes our U-value and condensation risk calculations will give you long term comfort and peace of mind
All TLX Gold compliant solutions have also achieved LABC Registered Details. Registered systems for TLX Gold help speed up the building regulation process by sharing technical details and recognising Building Control assessments made by others in the LABC network.
TLX Gold, TLX Silver & UV membranes are all guaranteed for 25 years. This means is that that not only does TLX Gold deliver on product performance, but we also guarantee our U-value and condensation risk calculations.