Brimstone ash face fixed decking
Q55 – External Timber Decking
General
- Brimstone ash decking boards face fixed to a timber substructure. Intended for use as external ground-level or raised decking in frequently wet applications (Use Class 4).
Products
Timber Decking
- Species: British ash (Fraxinus excelsior)
- Process: Thermal modification
- Supplied by: Vastern Timber. sales@vastern.co.uk . 01793853281
- Origin: Legal and well-managed forests in England
- Quality: BS1186-3 Class 1 / BS EN942:2007 J20
- Preservative impregnation: None
- Fire retardant impregnation: None
- Moisture content at time of fixing: 5 – 8%
- Profile: VDEC1, VDEC2, VDEC3
(Delete as appropriate) - Overall face width: 95mm, 120mm, 140mm
(Delete as appropriate) - Thickness: 21mm
- Length: Random 1.5 – 3.0m+
- Durability: Class 1 (BS EN 350-2)
- Service life: 20 years+
- Coatings: (add details)
- Anti-slip system: (add details)
Supporting Framework
- Substructure of treated softwood joists
- Maximum moisture content at time of fixing: 20%
Screws or Nails
- Decking: 50mm hardened stainless steel trim head screws
Execution
General
- Installation standard: In accordance with TRADA Timber Decking, the Professionals’ Manual 2nd Edition
- Handling: Avoid damage during handling. Store under cover with ventilation
- Waste and offcuts: Recycle, burn, or compost. Supplied untreated and uncoated for easy end-of-life recovery
Substructure
- Space joists at 400mm centres
- Construct to allow ventilation below deck boards
- Install on level, well-drained ground or solid base with appropriate fixings
- Install frame with a fall of 1:100 to prevent standing water
- Fix Gumo D distance band to top of joists to avoid permanent wet areas between deck boards and joists
- Treated timber: Treat surfaces exposed by cutting or drilling with two coats of a preservative solution recommended by supplier
Deck Boards
- Install deck boards securely and neatly to avoid bowing, splitting, indentations, or other unsightly characteristics
- Maintain minimum of 6mm expansion gap between boards
- Position board ends over a joist
- Fixing method: Pilot drill and countersink for each fixing. Insert two stainless steel decking screws through the face at each joist
- Screw heads to finish flush with or slightly below surface of wood. Avoid protruding or deeply recessed fastener heads
- Ensure all fixings are installed in a consistent and straight line to maintain a uniform appearance
Disclaimer
While the utmost care has been taken to provide accurate and relevant information, Vastern Timber shall not be held responsible for any consequences arising from errors or omissions within this information, nor for any damages resulting from the use of this information.
