First and foremost you Must ensure that the sort of flooring you have purchased is acceptable for a floating installation, if the flooring is a good wood type then it is not acceptable for floating, this is because solid wood is prone to a great deal of expansion, these kinds of floor have to be directly secured to the sub floor by either nailing or gluing down. The types of timber Floors which may be floated are the ones that are engineered, this flooring is made by bonding a veneer of wood, often called a ‘stave’ to multi layer ply wood. This creates a multi vertical structure, making it very secure, and so acceptable for floating installation.
Now you have ensured that your flooring lancaster is acceptable for this sort of installation, you must make certain that your subfloor is appropriate and ready to take your flooring. With a floating floor Your sub floor can be concrete, timber, or screed or a combination of all three, you need to make certain your sub floor is flat and level i.e. no deviations greater than plus or minus 2mm over 1.5m. If the sub floor does need leveling, then this may be done using many different methods. For those who have floor boards that are cupped and crowned i.e. convened or concaved, then you can ‘ply over’ these using 3mm ply or hardboard. The ply or hardboard ought to be stapled down with 18 gauge 18mm staples or tacked down with annular ring shank nails no more than 20mm. The thickness of these fixings is quite important like they too long then there are a possibility you may hit a water/gas pipe, because these are sometimes notched to the joists beneath the floor boards.
If they are very uneven you might use a thicker sheet of ply anywhere between 9 and 18mm, obviously the thicker sheet you use then the greater final floor level will be. If the flooring is still Un-level after installing the ply then level out this with a latex leveling compound, this has to be a two part chemical and suitable for using over wood, we normally use Adipex yellow bag and black jar. You must always prime the wood that is to be latexes using Bal R1131 or Adipex acrylic primer. When you have a flat Surface you need to now undercut the entire door frames, mule articles mule posts should be undercut by 10mm anymore will make the post shaky and architraves. It is quite important do for this as it allows you to record a smooth end; it also allows an expansion area for the wood. We do so with the undercut saw, which is essentially an upside down circular saw with a height addable sole plate, this permits the right height equivalent to that of the finished floor level to be undercut and eliminated.