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How Much Of An Irregularity Can There Be In An Existing Sub Floor?
Sub-floors must be inspected and tested to make sure that they are within acceptable tolerance parameters before starting the installation of any flooring type. Both the flatness and levels of the sub-floor must be within tolerance. The floor installation team must also ensure that the environment in which the floor is to be installed is within tolerance. Incorrect relative humidity percentages and room temperatures will adversely affect an installation. If the wood floor is being installed above an under floor heating system, the heating system must be correctly cycled prior to installation taking place; this process alone can take up to two weeks. The following information contains industry standard tolerances for the preparation of sub-floors that are to be covered with wood flooring.
CEMENT SCREED
Screed must be level to within a maximum tolerance of 3mm per 2 linear metres in all directions. loor.
JOISTS
Joists must be a maximum of 400mm centers and level to within a maximum tolerance of 3mm per 2 linear meters in all directions.
FLOORBOARDS
Existing floorboards above joists must be level to within a maximum tolerance of 3mm per 2 linear meters in all directions. Any damaged or rotten boards must be replaced.
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