UK/ Homegrown Larch Timber Cladding
QA Certificate
Certificate type
UK/ Homegrown Larch Timber Cladding.
Description
Compared to Siberian Larch, British grown Larch is typically warmer in appearance having a rich heartwood colour, it has a greater number of knots and perhaps more grain character.
Knots are brown and can be scattered and frequent, and they may loosen and weep resin for 12–18 months. It will colour down to a silver grey if it is not protected as soon as installation is complete with a good quality semi or fully translucent UV-radiation protective coating. It is a very strong and hard-wearing wood.
It is a very strong and hard-wearing wood and will colour down to a silver grey if it is not protected as soon as installation is complete with a good quality semi or fully translucent UV-radiation protective coating.
This species is only moderately durable and should be high pressure treated with NORclad Brunnea™ or NORclad Lite™ to give the species a 30 year warranty against rot and fungal decay out of ground contact (UC3)
Typical end uses:
Timber cladding.
Standards:
Quality of timber (Exposed Surfaces): To EN 14915 – NORclad Timber Cladding is produced in accordance with factory production control for selection, grading, machining and preservative treatment of solid wood cladding.
General information
Size[Size, Typically 3.6 or 4.8 m lengths] | - |
Uniclass 2015 | |
CAWS | H21/10 Vertical timber weatherboarding H21/110 Vertical timber weatherboarding H21/111 Horizontal timber weatherboarding H21/115 Vertical timber weatherboarding H21/15 Horizontal timber weatherboarding |
Specification data - Softwood weatherboards
Product Reference | UK/ Homegrown Larch Timber Cladding |
Profile | NWBB1Board and batten, 25 x 75/150 mm, 165 mm cover width. NWC1PTG open V, 25 x 150 mm, 125 mm cover width. NWC2PTG open square, 25 x 150 mm, 125 mm cover width. NWC3PTG open round, 25 x 150 mm, 125 mm cover width. NWCC1Chamfered cladding, 25 x 150 mm, 132 mm cover width. NWFE2Feather edge, 32 x 150 mm, 125 mm cover width. NWS1Shiplap, 25 x 150 mm, 130 mm cover width. NWSN1PTG open V, 25 x 100 mm, 72 mm cover width. NWSN2PTG open square, 25 x 100 mm, 72 mm cover width. NWSN3PTG open round, 25 x 100 mm, 72 mm cover width. |
Corner trims | Not requiredNWA175 x 75 mm. NWA250 x 50 mm. NWA363 x 63 mm. NWA450 x 50 mm. |
High pressure treatment | Not requiredNORclad Brunnea™If sapwood present in the species. NORclad Lite™If sapwood present in the species. |
Standard product features | Wood type: Softwood. Thickness: 20 mm. Colour: Pale red/ brown. Edges: Square or as profile. Origin: Extensively planted in many European Countries and the U.K. Sustainability: Sourced from well managed forests, FSC certified available on request. Density (12% moisture content): 550 kg/m³. Dimensional stability: It has a tendency to distort when wet or not dried, but once dry is generally stable. Recommend fixings: Only top quality stainless steel fixings should be used to avoid corrosion of fixings and blue staining of the profile. |
Product Options | Size: Typically 3.6 or 4.8 m lengths. Profiles: Bespoke profiles, PSE boards etc. can all be machined on request. |
Literature
Third party certifications
- Greenguard Children and Schools Certification : All treated products meet stringent standards for low volatile organic compound emissions (VOC)
- Greenguard Environmental Institute (GEI): GREENGUARD Certified