21mm Semi Solids & Solid Floors Wooden Floors
Anail down installation is common for solid and semi solid floors. It cannot be used on 14/15mm engineered floors. Whilst a nail down install will give you a solid feel, there are a few drawbacks. Nail down can be used over any type of wooden sub floor, and is a very forgiving method especially with uneven sub floors. Turgon always recommend new sub floors, but if this is not possible, then this can be a reasonable method.
For a professional installation call Turgon on 020 8343 3463
It is vital that the conditions set out below are strictly observed, if not, it will be to the detriment of your hardwood floor.
1.1 Sub Floor
- Any sub floor must be smooth and flat to within +/- 3mm over a 3 metre radius
- Concrete sub floors must be sound and not loose
- Wooden sub floors must be sound and securely fixed
- Moisture content of wooden sub floors must be between 8-10 % and within 4% of your hardwood floor to avoid over expansion or contraction.
- Moisture content of concrete screeds must be no greater than 75% relative humidity
- A DPM must be incorporated below the screeded surface
1.2 General Site Conditions
- Air relative humidity should be at a stable point between 40-60 %.
- Moisture content of the walls must not exceed 8%
- Air temperature should be no less than 130C and the general operating environment should be between 180C – 240C
- All wet trades such as plaster, terrazzo and floor tiling should be completed and dry before wood floors are installed.
- Windows must be glazed and outside doors hung before wood floors are installed.
- New buildings or extensions should be adequately ventilated and heated for at least 10 days before wood floors are installed.
- All radiator and water pipes should be subjected to a water test before installation of wood floors.
- All the door liners, architraves and doorstops will be undercut at the finished floor height to allow the flooring to be fitted beneath them with no visible gaps.
- All wooden doors, where necessary, will be taken down and trimmed to allow the doors to clear the new flooring. Once trimmed the doors will be re hung.
- The boards will be nailed down to the existing wooden subfloor by firing nails through the top of the tongue at an angle of 45 degrees using 50mm nails. Each board will be nailed every 250mm – 300mm but no nails will be used within 50mm of the end of the boards in order to avoid splitting.
- The boards will be laid to give a random joint pattern. This will normally be achieved by using the off-cut from the end of the first row to start the second row and the off-cut from the end of the second row will be used to start the third row and so on. Adjustments may need to be made to ensure that no two end joints are less than 150mm apart and that no two end joints are level with each other within 3 adjacent rows.
- An expansion gap will be maintained around the entire perimeter of the room to allow for the seasonal expansion and contraction of the floor. In general the expansion gap will need to be 1.5mm at each side for every metre of span. The expansion gap must not be filled and must be kept free of debris.
- This expansion gap will be covered by a matching pre finished solid hardwood scotia trim measuring 19mm x 19mm which will be pinned to the existing skirting boards.
- This expansion gap will be covered by either:
A matching pre finished solid hardwood scotia trim measuring 19mm x 19mm which will be pinned to the existing skirting boards.
A plain pine scotia trim measuring 19mm x 19mm which will be pinned to the existing skirting boards. You will need to have this trim decorated to match the skirting boards once the installation is completed.
By the re fitting of either the existing skirting boards or the re fitting of the new skirting boards..
- All other thresholds can be supplied and fitted where necessary in matching solid pre finished hardwood.