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Web Dynamics - TLX Silver - Insulating Vapour Barrier

Actis Logo - Innovative Heat Reflecting Multi-Foil Insulation

TLX Silver is a radiant barrier. The reflective surfaces on the outside and inner layers of TLX Silver are effective at both reflecting infra-red radiation back into the house, and in preventing the house from radiating energy out into the environment.

Similarly in summer, TLX Silver prevents overheating by limiting the amount of solar radiation that gets into the house. The wadding layers inside TLX Silver prevent conduction through the material by trapping air between the fibres. The inner films are spaced to prevent convection currents from forming within the body of TLX Silver.

TLX Silver reduces heat loss via all three means of heat transfer – radiation, conduction and convection.

Product Application

TLX Silver is a multi-foil insulating vapour barrier for pitched roof rafter level and exterior wall applications.


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Click to Buy: Web Dynamics TLX Silver - 30mm - Multi-Foil Insulation / Insulating Vapour Barrier


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Common product, generally held by all depots Web Dynamics TLX Silver 30mm, 1.2x10m = 12m² - ranging from £6.00 to £6.59 per m²

1 plus rolls @ £6.59 per m² = £79.09 (£94.91 inc-VAT) per roll
5 plus rolls @ £6.53 per m² = £78.39 (£94.07 inc-VAT) per roll
10 plus rolls @ £6.17 per m² = £74.03 (£88.84 inc-VAT) per roll
15 plus rolls @ £6.11 per m² = £73.36 (£88.03 inc-VAT) per roll
20 plus rolls @ £6.06 per m² = £72.70 (£87.24 inc-VAT) per roll
25 plus rolls @ £6.00 per m² = £72.03 (£86.44 inc-VAT) per roll

Common product, generally held by all depots Generic Aluminised Tape, 100mm x 45m = 45lm - ranging from £0.16 to £0.17 per lm

1 plus rolls @ £0.17 per lm = £7.62 (£9.14 inc-VAT) per roll
5 plus rolls @ £0.17 per lm = £7.55 (£9.06 inc-VAT) per roll
10 plus rolls @ £0.17 per lm = £7.48 (£8.98 inc-VAT) per roll
15 plus rolls @ £0.16 per lm = £7.41 (£8.89 inc-VAT) per roll
20 plus rolls @ £0.16 per lm = £7.35 (£8.82 inc-VAT) per roll
25 plus rolls @ £0.16 per lm = £7.28 (£8.74 inc-VAT) per roll

Price and Availability Information

Presently there are no availability restrictions, apart from manufacturing lead-times and minimum quantity order levels on certain product sizes.
Please observe the 'Star Rating' indicators to assess availability.

Excellent = Product Availability Excellent Good = Product Availability Good Fair = Product Availability Fair Poor =  Product Availability Poor Undetermined = Product Availability Undetermined
Product availability depends upon stock levels at closest depot and delivery logistics to geographic locations


Product Characteristics

Actis Hybris Honey Comb Innovative Hybrid Multi-foil Insulation

TLX Silver is an insulation material comprising outer layers of coated metallised film, laminated to a non woven polypropylene fabric enclosing the core and welded along both long edges. The core of the product consists of five layers of polyester fibre wadding separated by four metallised film layers.

Product Advantages

TLX Silver was the first multi-foil to be BBA (British Board of Agrément) certified for installation in pitched roofs at rafter level:

R-values and TLX Silver

TLX Silver can be used to achieve the high thermal insulation requirements demanded by today's Building Regulations.

By combining TLX Silver with other traditional insulation materials, target U Values can be met in ways to match the circumstances.

For example, where rafters are only 100mm thick and 1F felt remains in place,

TLX Silver can reduce installation times of rigid polyurethane significantly by overcoming the need to cut and fix rigid polyurethane between rafters.

Alternatively, where rafters are 150mm thick TLX Silver can be used in combination with (cost-effective but difficult to install) glass or mineral wool to achieve U Values of 0.2.

U Values and TLX Silver

Using TLX Silver as a platform it is possible to build the required U Value using the BRE U Value calculator to maximise the thermal value and minimise the loss of internal space in new and re-furbished roofs, walls and dormers. TLX Silver provides a wide range of options that can be influenced by rafter thickness and width as well as whether rafters are partially or completely exposed. Please see example images.

Other benefits include ...

  • Air-tight vapour barrier
  • No cold bridges
  • Fast and simple installation
  • Easy to cut
  • Highly tear resistance

Product Information and Certification

Links to manufacturer's information. Click to download in a separate browser window.

TLX Gold Datasheet | TLX Gold Installation Instructions | CE Declaration of Performance - TLX Gold| TLX Gold European Technical Approval


Web Dynamics Insurance & Certification:

Citation: Web Dynamics Statement regarding Insurance and 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.

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 European standards, TLX Gold achieved European Technical Approval (ETA) in 2011. A technical assessment of a product’s suitability for an intended use – which goes further than a BBA (British Board of Agrément) certificate – the award is valid for five years and allows us to use the much recognised CE marking on our product.

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 and UV membrane products are guaranteed for 25 years. What 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. You can be confident you have made the right choice for you and your customers when you install TLX Gold.

Reassurance for Householders

TLX Insulation is the only insulation manufacturer to have become an associate member of the Government licensed TrustMark Scheme.

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.

Citation ends:


Product Performance

Thermal insulation

TLX Silver is a radiant barrier. The reflective surfaces on the outside and inner layers of TLX Silver are very effective at both reflecting infra-red radiation back into the house, and also in preventing the house from radiating energy out into the environment. Similarly in summer, TLX Silver prevents overheating by limiting the amount of solar radiation that gets into the house.

The wadding layers inside TLX Silver prevent conduction through the material by trapping air between the fibres. The inner films are spaced to prevent convection currents from forming within the body of TLX Silver. TLX Silver reduces heat loss via all three means of heat transfer – radiation, conduction and convection.

Vapour control

TLX Silver is a vapour barrier. When installed on the warm side of a roof or wall structure it prevents water vapour from the house penetrating into the roof or wall where it might find a cold surface on which to condense.

Airtightness

TLX Silver is airtight, and by wrapping around a roof or wall, including junctions with other parts of the building such as windows or doors, it makes the whole building envelope more airtight. This reduces unpleasant cold draughts, and prevents the escape of warm air from the house.

Thermal bridging

TLX Silver fits across timber members such as rafters or wall studs, acting as a thermal brake to limit heat flow through the timber.


TLX Silver - Product Installation

General installation guidelines for TLX Silver

Thinsulex can be attached to the rafters by using double sided tape, glue, staples or nails.
Thinsulex Silver should have a 50mm overlap and be taped along the entire length of the joint with a self-adhesive aluminium foil tape.

For under rafter applications

Starting at the ridge and working down, unroll Thinsulex Silver parallel to the eaves.
Cross batten Thinsulex Silver from the ridge downwards with the batten spacing no greater than 600mm. The cross battens should be a minimum of 38mm thick.
Finally fix the internal foil backed plasterboard to the cross battens.

For over rafter applications

Starting at the eaves and working upwards, unroll Thinsulex Silver parallel to the eaves.

Fix battens on top and along the line of the rafters.

Install breather membrane over the battens.

Fix the membrane in place with the tile battens.

Tiles/slates should be fitted as soon as possible.


Installing additional insulation.

PIR such as PIR (polyisocyanurate) Rigid Insulation

Install the PIR (with a lambda value of 0.022W/mK) in accordance with manufacturer's instructions for an unventilated pitched roof, based on a between rafter application.
Refurbished roof requires 115mm PIR or New build roof requires 145mm PIR in addition to the TLX Silver, plus a 38mm air gap above and below the PIR must be maintained (as per BBA Certificate 06/4379)

Mineral wool

Place the mineral wool/fibre glass (with a lambda value of 0.044W/mK) in between the rafters and directly on top of the TLX. The actual thickness/density requirement of the Mineral Wool is not specified on the BBA Certificate, therefore confirmation should be sought from the manufacturer.

Performance considerations:

As Thinsulex Silver performs as a vapour barrier, it is advisable to utilise a breather membrane, preferably reflective, in your roof system. This will eliminate the need for additional ventilation.
When installing PIR to attain the U Value of 0.16W/m2K a minimum rafter depth of 150mm is required.
When using insulated plasterboard, a vapour barrier must be installed.


TLX Silver Installation Options, including U Value examples

Complies with Part L by combining the benefits of thin foil insulation with other insulation materials. Using Thinsulex Silver as a platform it is possible to build the required U Value using the BRE U Value calculator. This provides a wide range of options which can be influenced by rafter thickness and width as well as whether rafters are partially or completely exposed.


TLX Silver below rafters with 110mm mineral glass wool between rafters and breather membrane
TLX Silver 100mm rafter solution incorporating 120mm mineral glass wool

TLX Silver below 100 rafters with 70mm Celotex between rafters and If Felt above
TLX Silver 100mm rafters under 1F Felt with 80mm Celotex


TLX Silver below rafters with Celotex 60mm between rafters and breather membrane above
TLX Silver below rafters with Celotex 70mm


150mm Rafter 0.2 U Value Examples

TLX Silver below rafters with Celotex 70mm between 150mm rafters and breather membrane
TLX Silver above rafters with Celotex 70mm between rafters and 1F felt

TLX Silver above rafters with Celotex 60mm between rafters and breather membrane on top

TLX Silver above rafters with Glasswool 120mm between rafters and breather membrane

TLX Silver below rafters with 105mm mineral glass wool between rafters and breather membrane

TLX Silver below rafters with Celotex 70mm between 150mm rafters and 1F roofing felt

N.B. Glasswool at 105mm with a 0.032 W/mK Lambda value may not be readily available, but is shown as the minimum requirement


TLX Silver above rafters with Glasswool 105mm between rafters and breather membrane.
TLX Silver below rafters with Glasswool 120mm between rafters and breather membrane

N.B. Glasswool at 105mm with a 0.032 W/mK Lambda value may not be readily available, but is shown as the minimum requirement.


TLX Silver Installation and fitting instructions

Installing TLX Silver below rafters

  • TLX Silver is unrolled across the underside of the rafters in horizontal layers, parallel to the eaves.
  • The product should be installed from ridge to eaves to ensure that any water inside the rafter space runs down and does not penetrate the insulation or the rafter space.
  • As the TLX Silver is unrolled across the rafters it is fixed in place using nails or staples of at least 14mm depth.
  • The next roll of TLX Silver must overlap the preceding layer by at least 50mm, and the overlap should be sealed along the entire length using a suitable adhesive tape silver Duck tape from Henkel is recommended.
  • TLX Silver should be permanently held in place using wooden battens fixed with nails.

  • Battens may run either parallel or perpendicular to the rafters.

  • When the bottom layer of TLX Silver has been battened, any excess material may be cut by running a sharp knife along the edge of the batten.
  • A foil-backed plasterboard is fixed to the battens. Batten thickness should be sufficient to ensure a 20mm air gap between the TLX Silver and the plasterboard.
  • Any exposed cut edges of TLX Silver should be sealed with a suitable adhesive tape. Any tears or holes in the outer layer should be repaired with heat-reflective tape.
  • A breathable roofing membrane is fitted above the rafters following the manufacturers instructions, then the Tiling battens and tiles are fitted.
  • TLX Silver can be cut with a sharp knife or scissors. Protective clothing is not required when handling TLX Silver.
  • TLX Silver may be installed either way up.
  • TLX Silver is unrolled across the top of the rafters in horizontal layers, parallel to the eaves.
  • The product should be installed from eaves to ridge to ensure that any water falling onto the TLX Silver runs down and does not penetrate the insulation or rafter space.
  • As the TLX Silver is unrolled across the rafters it is fixed using nails or staples of at least 14mm length.

  • The next roll of TLX Silver must overlap the preceding layer by at least 50mm, and the overlap should be sealed along the entire length using a suitable adhesive tape silver Duck tape from Henkel is recommended.
  • TLX Silver should be permanently fixed in place using wooden battens parallel to the rafters held in place with nails.

  • A breathable roofing membrane should be installed on the battens and tiling battens attached perpendicular to the rafters.
  • When the top layer of TLX Silver has been battened, any excess material may be cut by running a sharp knife along the edge of the batten.
  • Any exposed cut edges of TLX Silver should be sealed with a suitable adhesive tape.

  • Any tears or holes in the outer layer should be repaired with heat-reflective tape.
  • The start of the roll of TLX Silver should be stapled to the end rafter in the roof.

  • TLX Silver is then rolled along the inside of the rafter to a depth of 50mm and stapled in place.

  • TLX Silver is then taken across the rafter space to an equivalent point on the adjacent rafter, 50mm up from the bottom of the rafter, stapled and taken around the bottom of the rafter a distance of 50mm into the next rafter space.

  • The TLX Silver is effectively recessed 50mm into the rafter space.
  • Wooden battens or other secure means of attachment should be nailed to secure the TLX Silver effectively.

Eaves details

TLX Silver below rafter at junction of roof and wall.
  • At the bottom of the roof, TLX Silver should be cut to fit between the rafters, and taken down between the joists to either the wall plate or the cavity insulation.
  • The TLX Silver should be stapled to the joists, and all cut or open edges sealed with a suitable tape.
  • All junctions of TLX Silver with rafters, joists or wall plate should also be sealed with tape to create an airtight seal.
  • It is important that TLX Silver extends to either the wall plate or the cavity insulation to ensure continuity of insulation material. If TLX Silver extends to the wall cavity, then a barrier to resist fire for at least 30 minutes should be fixed at the top of the cavity to prevent spread of fire from the wall cavity into the roof.
  • Insulation material such as PIR or mineral wool inside the rafters should be fitted according to manufacturers guidelines. Additional insulation must extend at least as far as the cavity insulation to maintain continuity of insulation.
TLX Silver above rafter at junction of roof and wall.
  • At the bottom of the roof, TLX Silver should be cut to fit between the rafters, and taken down between the rafters to either the wall plate or the cavity insulation.
  • The TLX Silver should be stapled to the rafters, and all open or cut edges sealed with a suitable tape.
  • All junctions of TLX Silver with rafters, joists or wall plate should also be sealed with tape to create an airtight seal. It is important that TLX Silver extends to either the wall plate or the cavity insulation to ensure continuity of insulation material.
  • If TLX Silver extends to the wall cavity, then a barrier to resist fire for at least 30 minutes should be fixed at the top of the cavity.
  • Insulation material such as PIR or mineral wool should be fitted inside the rafters according to manufacturers guidelines. Additional insulation must extend at least as far as the wall to maintain continuity of insulation.

Ridge details

TLX Silver below rafter at ridge.
  • When installing TLX Silver on the first side of the roof, the top layer of TLX Silver should be fitted tightly into the ridge.

  • When installing on the other side, the top layer of TLX Silver should overlap the opposing side by 50mm.
  • The overlap should be taped along its entire length with a suitable adhesive tape.
  • Insulation material such as PIR or mineral wool inside the rafters should be installed such that the insulation on both sides of the roof meets up at the ridge with no gap.
TLX Silver above rafter at ridge.
  • When installing TLX Silver on the first side of the roof, the top layer of TLX Silver should be taken to the top of the ridge.
  • When installing on the other side, the top layer should overlap the opposing side by 50mm.
  • The overlap should be taped along its entire length with a suitable adhesive tape.
  • Insulation material such as PIR or mineral wool inside the rafters should be installed such that the insulation on both sides of the roof meets up at the ridge with no gap.

TLX Silver below rafters & between purlins

  • TLX Silver is installed horizontally across the underside of the rafters and stapled in place.
  • At the purlin, the TLX Silver is turned into the purlin a length of 25mm and battened in place with a 25mm batten.
  • The edge of the TLX Silver is trimmed by running a sharp knife along the edge of the batten.
  • Plasterboard may be fitted over the battens.
    Additional insulation material installed between rafters should extend behind the purlins.

Downlighters

  • TX Silver should not be placed in direct contact with a downlighter.
  • TLX Silver should be installed and the position of the centre of the downlighter marked.
  • A circular hole of radius 25mm greater than the radius of the downlighter should be cut in the TLX Silver.
  • The cut edge should be sealed with tape. Plasterboard should be installed and the light fitted.

Roof window

  • The window frame should be level or lower than the top of the rafter. TLX Silver can be installed above or below rafters.
  • In both cases, TLX Silver should continue up to the window frame, then cut to fit between the rafters, taken between the rafters to the window frame and securely taped in place.
  • Insulation material such as PIR or mineral wool should be installed between the rafters and should pack the space around the window frame.

Junction with dormer wall

  • The dormer wall should be insulated with a layer of TLX Silver inside the wall studs and additional insulation material such as PIR or rigid mineral or glass wool between the studs to give a U value of 0.30 W/m2K for the wall construction.
  • Continuity of both TLX Silver and the additional insulation should be maintained at all junctions.

Flashings

  • TLX Silver may be fitted either above or below rafter. TLX Silver is taken to the wall and a length of 25mm turned up against the wall.
  • A batten is fixed to the rafter to hold the TLX Silver tight against the wall.
  • A breathable roofing membrane is fitted above the rafters and also turned up at the wall.
  • Tile battens are fitted.
  • Flashing is fitted above the tile battens and over the breathable membrane.
  • Tiles are installed above the flashing.

Vents

  • TLX Silver can be fitted either above or below rafter.
  • TLX Silver should be turned up at the vent and sealed around the vent using a suitable adhesive tape.
  • The breathable roofing membrane should also be turned up and sealed to the vent.
  • The flashing for the vent is fitted above the tile battens and tiles.

Installing additional installation

  • Install additional insulation according to the manufacturers instructions.
  • Provide for air gaps between additional installation and TLX Silver as instructed.
  • TLX Silver must always be taped together when the surfaces are clean and dry.

Storage

  • TLX Silver rolls must be stored on a flat dry surface, protected from the weather and direct sunlight.
  • Make sure when installing TLX Silver that it does not come into contact with heat sources greater than 80C or electric wiring

Certification

  • To ensure compliance with Building Regulations always install TLX Silver in line with the information incorporated its BBA Certificate


Priced on Application:

Generally, Products are readily available

Estimates for large quantity orders can be priced on application. Please contact us to discuss such matters.

Contact us directly for further information: Telephone 0333 9000 989  - Email: Click Here:


Manufacturer's Contact Details

Web Dynamics Limited

Moss Lane, Blackrod, Bolton, Lancashire BL6 5JB

Telephone: +44 (0) 1204 674 730
Email: technical@webdynamics.co.uk
Web site: Web Dynamics TLX Insulation Products

Our Contact Details

www.just-insulation.com

Insulation Online Limited, 27 Massetts Road, Horley, Surrey, RH6 7DQ

Telephone: 0333 9000 989

Facsimile: 0333 7000 797

Email: enquiries@just-insulation.com

Web site: www.just-insulation.com

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