Gutex Multiplex Top
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Product Overview
Main purpose
Thermal insulation, waterproofing and weatherproofing of roofs and walls and to reduce thermal bridging.
Use it on
On the outside of pitched roofs where the slope is at least 15° (additional sealing measures are required for pitches of <15°) and on timber frame walls. May be applied in conjunction with woodfibre insulation boards or directly onto rafters or studs.
Overview
Gutex Multiplex Top is used as a high-performance breathable insulated sarking board for pitched roofs and timber frame walls. It is typically installed directly unsupported over walls and roofs or on top of other Gutex wood fibre boards to create a waterproof and rain-tight outer layer to the roof insulation. Manufactured with a carbon negative production process from recycled wood chips, it has excellent thermal performance. This insulated sarking board protects from cold in winter and prevents overheating in the summer.
Features
- Stops thermal bridging
- Tongue & groove edge is wind and watertight
- Highly breathable (vapour open)
- Prevents summer overheating
- Excellent sound insulator
- Carbon negative production process, fully recyclable and safe
- Complies with EN standards
- Fire resistant
Benefits
- Fast & accurate installation, creating an insulated, waterproof & windtight construction.
- Absorbs heat from the sun & then delays its transmission to the inside creating a comfortable living space all year round.
- High levels of breathability will improve a building’s ability to dry out.
- Absorbs airborne, impact & high frequency noise, reducing noise levels by up to 50dB.
- Joints are so tight; tape is unnecessary except where boards are cut or butt jointed.
- On 15° pitched roofs or greater, requires no additional external membranes saving time, reducing costs and labour
- Insulation made with a carbon negative production process from waste woodchips originally from sustainable timber sources.
- Gives up to 90 minutes fire protection (EN13501-2) due to its charring reaction to fire.
Questions
There are currently no questions and answers published for this product
Technical Details
Key Technical Data
Installation Guide
How to install
Multiplex Top must be stored under dry conditions. If stored outside, make sure the waterproof side (with printed text on) is facing towards the elements.
The boards should be installed perpendicular to the timber rafter or stud (i.e. horizontally for the long length of the boards). The boards should always be installed so the tongue of the board points up the roof and the printed side faces outwards. This ensures the waterproofing and tongue position are correctly oriented. Roof battens and counter battens should be applied immediately after Multiplex Top has been installed. A long screw or rust resistant nail is fixed through the batten, into Multiplex Top and any further insulation underneath, straight into the rafter. This adds strength and rigidity to the insulation layer and a sound platform onto which roof tiles can be fixed. When the total insulation is less than 40mm, standard screws or galvanised nails can be used instead.