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The Rooftec 120gsm Breathable Roofing Membrane is a lightweight, durable and BBA Certified vapour-permeable roofing membrane suitable for a wide range of pitched roofing and framed construction applications.
Combining air-tightness with vapour permeability, Rooftec 120gsm can be installed in fully supported or unsupported applications beneath tiles and slates. It is suitable for both warm and cold roof constructions, as well as timber frame, metal frame and Scottish sarking board applications.
The membrane is waterproof, resistant to extreme temperatures and UV stable for up to 3 months. It also conforms to BS 5534:2014 Annex A.
This listing is for full pallet quantities, available as either 35 x 1m x 50m rolls or 42 x 1.5m x 50m rolls.
Rooftec 120gsm Breathable Roofing Membrane is BBA Certified, making it suitable for specified roofing and construction applications where a certified breathable membrane is required.
It provides a lightweight roofing underlay for use beneath suitable tiles and slates on pitched roofs.
Rooftec 120gsm conforms to:
BS 5534:2014 Annex A
BS 5534 covers slating and tiling for pitched roofs and vertical cladding, including requirements relating to roofing underlays.
The complete roof should always be designed and installed in accordance with the appropriate specification and current installation requirements.
Rooftec Breathable Roofing Membrane has a material weight of:
120gsm
This provides a lightweight and durable membrane that is practical to handle and install across larger roofing projects.
Rooftec 120gsm is vapour permeable, allowing water vapour to pass through the membrane as part of a correctly designed roof construction.
This makes it suitable for a variety of pitched roof build-ups, including appropriate warm and cold roof applications.
The membrane provides a waterproof protective layer beneath the primary roof covering.
When correctly installed, it helps protect the underlying roof construction from external moisture that penetrates beneath the tiles or slates.
Rooftec 120gsm Breathable Membrane is suitable for pitched roofs finished with:
Its broad application range makes it suitable for new-build, refurbishment and other appropriate pitched roofing projects.
Rooftec 120gsm can be used in both:
This provides flexibility across different roof constructions and installation methods.
Rooftec Breathable Roofing Membrane is suitable for:
The insulation, ventilation and overall roof build-up should be designed according to the requirements of the individual project and complete roofing system.
In addition to pitched roofing applications, Rooftec 120gsm is suitable for use in:
This allows the membrane to be specified across a wider range of suitable building envelope applications.
Rooftec 120gsm Breathable Roofing Membrane is suitable for applications incorporating Scottish sarking boards.
This makes it suitable for relevant fully supported roofing constructions where a breathable membrane is required over the sarking board.
Rooftec 120gsm provides:
UV stability for up to 3 months
This provides temporary resistance to UV exposure during construction.
The membrane is not intended to replace the finished roof covering and should be covered in accordance with the manufacturer’s installation requirements.
Rooftec Breathable Roofing Membrane provides resistance to extreme temperatures, supporting its use in demanding roofing and construction environments.
Specific minimum and maximum temperature figures have not been provided in the supplied technical information.
At 120gsm, Rooftec Breathable Roofing Membrane provides a lightweight construction while retaining the durability required for appropriate roofing applications.
The lower weight can make rolls easier to handle and position across larger roof areas.
Rooftec 120gsm Breathable Roofing Membrane is available in two sizes:
Each roll provides a nominal membrane area of:
50m²
Full pallet quantity:
35 rolls
Total nominal membrane area:
1,750m² per pallet
Each roll provides a nominal membrane area of:
75m²
Full pallet quantity:
42 rolls
Total nominal membrane area:
3,150m² per pallet
These figures represent the nominal membrane area before allowing for laps, overlaps, detailing and installation waste.
This product is supplied in full pallet quantities:
| Roll Size | Area Per Roll | Rolls Per Pallet | Nominal Area Per Pallet |
|---|---|---|---|
| 1m x 50m | 50m² | 35 | 1,750m² |
| 1.5m x 50m | 75m² | 42 | 3,150m² |
The actual roof area covered will be lower because membrane overlaps, detailing and cutting waste must be allowed for.
The full pallet format is particularly suitable for:
A breathable roofing membrane is an underlay installed beneath the primary roof covering that helps protect the roof construction against external moisture while allowing water vapour to pass through the membrane.
Rooftec 120gsm combines vapour permeability with waterproof performance and air-tightness for suitable roofing and construction applications.
Yes. Rooftec 120gsm Breathable Roofing Membrane is BBA Certified.
The supplied technical information states that Rooftec 120gsm:
Conforms to BS 5534:2014 Annex A.
The membrane should be installed in accordance with the manufacturer’s instructions and the requirements of the complete roof specification.
Yes. The membrane is suitable for fully supported or unsupported pitched roofing applications beneath suitable roof tiles.
Yes. Rooftec 120gsm can be used beneath slate on appropriate pitched roof constructions.
Yes. Rooftec 120gsm is suitable for both fully supported and unsupported installations.
Yes. Rooftec 120gsm Breathable Roofing Membrane is suitable for applications incorporating Scottish sarking boards.
Yes. The membrane is suitable for both warm and cold roof applications.
The complete roof build-up should be designed with the appropriate insulation and ventilation requirements for the project.
Rooftec 120gsm is stated to be:
UV stable for up to 3 months.
This relates to temporary exposure during construction. The membrane should ultimately be protected by the finished roof covering.
The quantity depends on the roll width selected:
The nominal membrane quantity is:
1m x 50m rolls
35 rolls x 50m² = 1,750m² per pallet
1.5m x 50m rolls
42 rolls x 75m² = 3,150m² per pallet
These are nominal material areas. Actual roof coverage will be lower after allowing for overlaps, laps, detailing and waste.
The principal difference stated between the two Rooftec membranes is their material weight:
Both are available in 1m x 50m and 1.5m x 50m roll sizes, but their full pallet quantities differ.
The 120gsm membrane allows more rolls and a greater nominal membrane area to be supplied on each full pallet, making it particularly useful where large quantities of membrane are required.
The appropriate membrane should be selected according to the specification and performance requirements of the individual roofing project.
The Rooftec Breathable Roofing Membrane BBA 120gsm provides a lightweight and versatile roofing underlay for professional pitched roofing and framed construction applications.
It combines BBA Certification, vapour permeability, waterproof performance, air-tightness, three-month UV stability and conformity to BS 5534:2014 Annex A.
Suitable for fully supported and unsupported installations, tiles and slates, warm and cold roofs, timber and metal frame construction and Scottish sarking boards, it provides broad application versatility.
For larger projects, the full pallet quantities provide substantial coverage, with 1,750m² of nominal membrane per pallet of 1m rolls or 3,150m² per pallet of 1.5m rolls.
For customers searching for 120gsm breathable membrane, BBA breathable roofing membrane, breathable roof felt, BS 5534 roofing membrane, pitched roof underlay or breathable membrane full pallets, Rooftec 120gsm provides a practical solution for professional roofing projects.
Please note: Nominal roll and pallet areas do not account for overlaps, detailing or installation waste. Ventilation requirements, fixing specifications, lap dimensions and other installation details should follow the manufacturer’s instructions and the requirements of the complete roof system.
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