Summary
A low resistance vapour permeable roof tile and slate underlay for use in cold and warm roofs.
A low resistance vapour permeable roof tile and slate underlay for use in cold and warm roofs.
Application
- A roof tile and slate underlay for pitched roofs.
- Can be used unsupported draped over timber rafters or counter battens, or fully supported over timber sarking or rigid insulation.
- A roof tile and slate underlay for pitched roofs.
- Can be used unsupported draped over timber rafters or counter battens, or fully supported over timber sarking or rigid insulation.
Description
Danelaw® LR150TT is a universal middleweight low resistance vapour permeable roofing underlay intended for use on pitched roofs as a secondary barrier installed beneath tiles and slates. The Danelaw® LR150TT has an integral tape to tape system for effectively sealing the horizontal overlaps in moist and dusty conditions. Also available without the integral tape (Danelaw® LR150).
LR150TT:
- Wind uplift resistance at 345 mm batten gauge: 2650 Pa.
- BRE wind zone suitability: zones 1 to 5.
LR150:
- Wind uplift resistance at 345 mm batten gauge: 1214 Pa.
- BRE wind zone suitability: zones 1 to 3.
Features and benefits:
- BBA approved for use in warm and cold roofs.
- Classified as LR (Low Resistance) in accordance with BS 5250.
- Integral tapes for effectively sealing overlaps.
- Reduced condensation risk.
- Durable and resistant to damage from foot traffic.
- UV resistant.
- Temporary weather protection prior to tile or slate fixing.
- Contributes to weathertightness of a completed roof.
- Airtight when sealed for improved energy efficiency.
- CE and UKCA marked.
Danelaw® LR150TT is a universal middleweight low resistance vapour permeable roofing underlay intended for use on pitched roofs as a secondary barrier installed beneath tiles and slates. The Danelaw® LR150TT has an integral tape to tape system for effectively sealing the horizontal overlaps in moist and dusty conditions. Also available without the integral tape (Danelaw® LR150).
LR150TT:
- Wind uplift resistance at 345 mm batten gauge: 2650 Pa.
- BRE wind zone suitability: zones 1 to 5.
LR150:
- Wind uplift resistance at 345 mm batten gauge: 1214 Pa.
- BRE wind zone suitability: zones 1 to 3.
Features and benefits:
- BBA approved for use in warm and cold roofs.
- Classified as LR (Low Resistance) in accordance with BS 5250.
- Integral tapes for effectively sealing overlaps.
- Reduced condensation risk.
- Durable and resistant to damage from foot traffic.
- UV resistant.
- Temporary weather protection prior to tile or slate fixing.
- Contributes to weathertightness of a completed roof.
- Airtight when sealed for improved energy efficiency.
- CE and UKCA marked.
Color
Grey
Grey
Finish
Other
Other
Material
Composite
Composite
Shape
Rectangle
Rectangle
Length
50000 mm
50000 mm
Width
1000 mm, 1500 mm
1000 mm, 1500 mm
SKU Code
DLR150TT 1.0, DLR150TT 1.5, DLR150 1.0, DLR150 1.5
DLR150TT 1.0, DLR150TT 1.5, DLR150 1.0, DLR150 1.5
Specification
Classification data
Standard
To BS EN 13859-1.
To BS EN 13859-1.
Third-party certification
British Board of Agrément (BBA) certificate.
British Board of Agrément (BBA) certificate.
Performance criteria
-
-
Water vapour properties
0.02 (+0.020/-0.005) sd(m).
0.02 (+0.020/-0.005) sd(m).
Fire performance
Class E.
Class E.
Tensile properties
Longitudinal/ transverse (before ageing): 350 (±40)/ 210 (±40) N/50 mm.
Longitudinal/ transverse (after ageing): 320 (±40)/ 180 (±20) N/50 mm.
Longitudinal/ transverse (before ageing): 350 (±40)/ 210 (±40) N/50 mm.
Longitudinal/ transverse (after ageing): 320 (±40)/ 180 (±20) N/50 mm.
Class (minimum)
W1.
W1.
Material
Two layer non-woven spun-bonded polypropylene, with a calcium microporous film.
Two layer non-woven spun-bonded polypropylene, with a calcium microporous film.
Form
Spun-bonded.
Spun-bonded.
Weight (minimum)
150 gsm.
150 gsm.
Reflective face
None.
None.
Additional properties
Width
1000 mm., 1500 mm.
1000 mm., 1500 mm.
Air permeability
0.04 m³/m² x h x 50 Pa.
0.04 m³/m² x h x 50 Pa.
Elongation
Longitudinal/ transverse (before ageing): 60 (±15)/ 75 (±15)%.
Longitudinal/ transverse (after ageing): 40 (±10)/ 50 (±10)%.
Longitudinal/ transverse (after ageing): 40 (±10)/ 50 (±10)%.
Longitudinal/ transverse (before ageing): 60 (±15)/ 75 (±15)%.
Longitudinal/ transverse (after ageing): 40 (±10)/ 50 (±10)%.
Longitudinal/ transverse (after ageing): 40 (±10)/ 50 (±10)%.
Integral accessories
Integral tape to tape system.
-
Sustainability data
Contains Red List materials
No
No
Material
Composite
Composite
Recyclability
Recyclable after service life
Recyclable after service life
Recycled content
0 %
0 %