PROTECTING YOUR DECKING GUARANTEE
PLEASE READ THIS IMPORTANT INSTALLATION INFORMATION TO MAKE SURE YOUR 10 YEAR GUARANTEE IS IN PLACE,FAILURE TO COMPLY WITH THIS WILL VOID YOUR 10 YEAR GUARANTEE
THE TYPE OF SCREWS USED
Best Deck is supplied with a stainless steel screw that can be used only on a timber structure, however should you be using a steel type structure a self-tapping or tech screw will be used. These screws are not supplied. The size of the screw thread should be 4mm and to avoid damaging the planks the head of the screw needs to be just less than 5mm
IMPORTANT INSTALLATION REQUIREMENTS
PLEASE ENSURE THAT THE Following is adhered to in order to make sure that your 10 YEAR GUARANTEE IS IN PLACE.
THE SPACING BETWEEN THE JOISTS on a residential deck must be 350mm from the center of the joist to the center of the next joist. On a commercial or public deck installation this must be reduced to 300mm.THE CLOSER THE BETTER in all cases. The increase in the strength of the deck plank increases dramatically for every 10mm narrower it is supported.
YOU HAVE TO USE THE CLIPS everywhere you CANNOT PUT SCREWS THROUGH THE DECK PLANKS THAT IS THE REASON FOR HAVING THE CLIPS.
LAYING THE PLANKS AND UNDERSTANDING WHAT TO DO WHEN YOU HAVE TO BUTT PLANKS TOGETHER.
You have to MAKE SURE that every plank irrespective of how short it is or how long it is uses a full clip at the beginning of a plank and at the end of a plank (SEE ATTACHED DIAGRAM). The ends of a plank HAVE TO SIT ON THE SUPPORT STRUCTURE THEY CANNOT BE FLOATING.
Planks have to be supported with a batten or beam they cannot be straight onto a surface.
WHERE PLANKS ARE BACK TO BACK THE SUPPORT BEAMS NEED TO BE DOUBLE JOISTED OR WIDE ENOUGH TO ACCOMMODATE TWO FULL CLIPS WITH ITS 5MM GAP (SEE DIAGRAM)
THE SUPPORT STRUCTURE
THIS IS THE MOST IMPORTANT REQUIREMENT Your support beams all HAVE TO BE AT THE EXACT SAME LEVEL (THEY CAN NOT VARY IN HEIGHT AT ALL), this allows the plank to expand and contract on a FLAT LEVEL SURFACE, as opposed to a WAVED TYPE SURFACE (WHICH PUTS PRESSURE ON THE PLANKS. PRESSURE ON THE PLANKS IS UNACEPTABLE when it comes to COMPOSITE WOOD DECK PLANKS they do not want to be put under any pressure and must be allowed to move freely. (THIS ALSO MEANS DON’T OVER TIGHTEN THE SCREWS. The DECK STUCTURE HAS TO BE SOUND AND SOLID there can be no movement in your structure the structure must feel like a concrete slab (that is how solid it needs to be). Failed decking 9.9 times out of 10 is due to a failed deck structure. REMEMBER STUCTURE IS JUST ANOTHER WORD FOR FOUNDATION U CANT BUILD ON A BAD FOUNDATION.
EXPANSION AND CONTRACTION
MAKE SURE you allow for those EXPANSION AND CONTRACTION gaps. One can make the inner gaps slightly smaller PROVIDED U HAVE INCREASED THE EXPANSION GAPS ON THE ENDS but even if you do this you must still have small expansion gaps between the planks that are butted up against each other.NO NAILS OR SCREWS ARE TO BE USED THROUGH THE PLANKS, as this could lead to splitting of the deck planks. The MAXIMUM SPAN WIDTH is 350mm center-to Centre. The Expansion and Contraction gaps on a back to back butt joins generally on the inner gaps must be 5mm or the thickness of a Best Deck Clip on its side. The outer gaps must be a minimum of 8mm from anything prohibiting from expanding.
DIAGRAM TO SHOW CORRECT INSTALLATION WHEN A BUTT OR BACK TO BACK JOIN IS REQUIRED
1-Note –The expansion gap between the planks
2-Note – The double joisting – Each plank rests on its own support
3-Note – Double clipping and how the clips are positioned and the end of the plank. Clips are not shared over 2 planks.
THIS must be done where planks are joined together and planks must be fixed with a Best Deck Clip on each end with its 5mm spacing: (See Diagram on double joisting and clipping)
FITTING THE FACIA AND 90 DEGREE CORNER EDGING
The Facia and 90 Degree corner edging or L COVER can be screwed into the structure using a flat head screw which you do not countersink into the material. PRE- DRILLED you also need to slot the hole from left to right to make it slightly wider than the shaft of the screw without over tightening it this will allow for any expansion and contraction.