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Platform floors vs. built-in floors: A platform floor has the floor boards or sheets installed before the walls, so that walls sit on the floor platform. Built-in floors have the wall-plates sitting directly on the floor joists, and the floor boards added after the walls and roof are finished.   kellyjones00 (593)

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Built-in floors: The roof needs to be finished, walls clad, and doors and windows installed, before installing floor-boards, or else they need to be very well protected from rain to maintain a moisture content of about 12%. Also, the doubled end floor joists of built-in floors are separated and not nail-laminated together as for platform floors. They are separated by packers, 22m wide for external walls, and 45mm wide for internal partition walls, to create the ledge to nail down the ends of floor boards.   kellyjones00 (593)

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Installing hardwood timber floor boards (General tips):


  • Stack the timber flat in the enclosed but ventilated destination room for a few weeks to ensure the moisture content is suitably adjusted.

  • If using recycled floorboards, use a fine file or sandpaper to remove crud from the tongue-and-groove edges. Remove nails that block tight fitting.

  • Install reflective foil sarking under the floor, and then lay insulation batts on top of the sarking between the floor joists.

  • Spring a chalk line down the centre of the room across the floor joists. Using 50 x 2.8mm nails, fix the first timber floor board to this line.

  • A cheaper version of floor clamps is to use a long sturdy F-clamp. Place one foot of the clamp flat against a small board screwed to a fixed floor board, and the other foot against a small, spare piece of tongue-and-groove board (*) that slots into the unfixed new board to be nailed. Place a knee against the loose piece (*) to avoid it tilting up. When the unfixed board is tightly slotted into the last fixed board, predrill and nail it in place.

  • The last board against the wall plate is pre-ripped, leaving a gap of 10mm to the wall plate. Use a pinch bar against the wall plate to push it firmly against the fixed board.

   kellyjones00 (593)
 
 


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