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The Rooftec 140gsm Breathable Roofing Membrane is a lightweight, durable and BBA Certified vapour-permeable roofing membrane designed for pitched roofing and framed construction applications.
Suitable for fully supported and unsupported installations beneath tiles and slates, the membrane can be used in both warm and cold roof constructions. It is also suitable for timber and metal frame construction, including applications incorporating Scottish sarking boards.
The membrane provides a combination of water resistance, vapour permeability and air-tightness, helping protect the roof construction while allowing water vapour to pass through the membrane.
This listing is for full pallet quantities, available in either 1m x 50m rolls with 27 rolls per pallet or 1.5m x 50m rolls with 30 rolls per pallet.
Rooftec 140gsm Breathable Membrane is BBA Certified, providing independently assessed performance for its intended applications.
It is designed as a breathable roofing underlay for use beneath suitable tiles and slates on pitched roof constructions.
Rooftec Breathable Roofing Membrane conforms to:
BS 5534:2014 Annex A
This makes it suitable for roofing applications where an underlay conforming to the stated BS 5534 requirements is specified.
Installation should always follow the membrane manufacturer’s guidance and the requirements of the complete roofing system.
Rooftec Breathable Roofing Membrane has a material weight of:
140gsm
The membrane combines a relatively lightweight construction with the durability required for appropriate roofing applications.
Rooftec 140gsm is vapour permeable, allowing water vapour within the roof construction to pass through the membrane.
This makes it suitable for both warm and cold roof applications, subject to the ventilation and construction requirements of the complete roof system.
The membrane provides a waterproof protective layer beneath the primary roof covering.
When correctly installed as part of a suitable roofing system, it helps protect the underlying roof construction against external moisture that passes beneath the tiles or slates.
Rooftec 140gsm Breathable Membrane can be installed beneath:
This makes it a versatile roofing underlay for a broad range of pitched roof constructions.
Rooftec Breathable Roofing Membrane is suitable for both:
This provides greater flexibility when specifying the membrane for different pitched roofing constructions.
The membrane can be incorporated into suitable:
The complete roof build-up, insulation and ventilation strategy should be designed and installed according to the requirements of the particular project.
Rooftec Breathable Membrane can also be used in appropriate timber frame construction applications.
Its combination of vapour permeability, water resistance and lightweight construction makes it suitable for a variety of framed building applications where the membrane’s stated performance characteristics are required.
In addition to timber framing, Rooftec 140gsm Breathable Membrane is suitable for appropriate metal frame construction.
This extends its use beyond conventional pitched roofing into a wider range of building envelope applications.
Rooftec Breathable Roofing Membrane is suitable for applications incorporating Scottish sarking boards.
This makes it a useful option for relevant roofing constructions where the membrane is installed over a fully supported sarking board arrangement.
Rooftec Breathable Roofing Membrane provides:
UV stability for up to 3 months
This provides temporary resistance to UV exposure during the construction process.
The membrane should not be treated as a permanent exposed roof covering and should be covered with the specified finished roof system in accordance with the manufacturer’s installation requirements.
Rooftec 140gsm Breathable Membrane is designed to provide resistance to extreme temperatures, supporting its use within demanding roofing and construction environments.
Specific minimum and maximum service temperatures have not been provided in the supplied technical information.
Despite its durable construction, Rooftec Breathable Roofing Membrane remains lightweight, making rolls practical to handle and position during installation.
This is particularly useful for larger pitched roof projects where substantial quantities of membrane are required.
Rooftec 140gsm Breathable Membrane is available in two roll sizes:
Each roll provides a nominal membrane area of:
50m²
Full pallet quantity:
27 rolls
Total nominal membrane area per pallet:
1,350m²
Each roll provides a nominal membrane area of:
75m²
Full pallet quantity:
30 rolls
Total nominal membrane area per pallet:
2,250m²
These figures represent nominal membrane area before allowing for laps, overlaps, detailing and installation waste.
This listing is specifically for full pallet quantities, making it particularly suitable for:
| Roll Size | Area Per Roll | Rolls Per Pallet | Nominal Area Per Pallet |
|---|---|---|---|
| 1m x 50m | 50m² | 27 | 1,350m² |
| 1.5m x 50m | 75m² | 30 | 2,250m² |
Actual coverage will be lower after allowing for the required overlaps, laps, detailing and waste.
A breathable roofing membrane is an underlay installed beneath the primary roof covering that helps protect the roof construction from external moisture while allowing water vapour to pass through the membrane.
Rooftec 140gsm combines this vapour permeability with water resistance and air-tightness for suitable roofing and framed construction applications.
Yes. The Rooftec 140gsm Breathable Roofing Membrane is BBA Certified.
The supplied technical information states that Rooftec 140gsm:
Conforms to BS 5534:2014 Annex A.
Installation should still comply with the requirements of the complete roofing specification and relevant current standards.
Yes. Rooftec 140gsm Breathable Membrane is suitable for use beneath tiles on appropriate pitched roof constructions.
Yes. The membrane is suitable for appropriate pitched roofs finished with slate.
Yes. Rooftec 140gsm Breathable Roofing Membrane is suitable for both fully supported and unsupported installations.
Yes. Rooftec 140gsm is suitable for applications incorporating Scottish sarking boards.
Yes. The membrane can be used in both warm and cold roof applications, subject to the requirements of the complete roof design.
The membrane is stated to be:
UV stable for 3 months.
This should be regarded as temporary construction exposure rather than permission to use the membrane as a permanent exposed roof covering.
The pallet quantity depends on the roll size selected:
Based on the nominal dimensions:
1m x 50m
27 rolls x 50m² = 1,350m² nominal membrane area
1.5m x 50m
30 rolls x 75m² = 2,250m² nominal membrane area
These figures do not account for required overlaps, detailing or waste.
The 1m x 50m roll provides 50m² of nominal membrane area and is supplied as 27 rolls per pallet.
The 1.5m x 50m roll provides 75m² per roll and is supplied as 30 rolls per pallet, giving significantly more total membrane per full pallet.
The most appropriate width will depend on the roof dimensions, installation method and project requirements.
The Rooftec Breathable Roofing Membrane BBA 140gsm provides a versatile roofing underlay for professional pitched roofing and framed construction applications.
Its combination of BBA Certification, vapour permeability, waterproof performance, lightweight durability, three-month UV stability and conformity to BS 5534:2014 Annex A makes it suitable for a broad range of roofing projects.
It can be used in fully supported or unsupported installations beneath tiles and slates, warm and cold roofs, timber and metal frame construction, and applications incorporating Scottish sarking boards.
Available as full pallets of either 27 x 1m x 50m rolls or 30 x 1.5m x 50m rolls, it provides a practical bulk purchasing option for roofing contractors, developers and larger construction projects.
For customers searching for 140gsm breathable membrane, BBA roofing membrane, breathable roof felt, pitched roof underlay, BS 5534 roofing membrane or breathable membrane full pallets, Rooftec provides a versatile solution for professional roofing applications.
Please note: Nominal roll and pallet areas do not account for overlaps, detailing or waste. Ventilation requirements, fixing specifications, lap dimensions and installation details should follow the manufacturer’s instructions and the requirements of the complete roof system.
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