Hygrohood - For use with CMExpert or MRH
Hygrohood - For use with CMExpert or MRH Kit (Sold seperatly)
Excess Moisture in floor slabs and screeds can cause numerous problems in all types of floor coverings leading to complete floor failure and even structural damage.
MANUFACTURERS OR NATIONAL STANDARD RECOMMENDATIONS
British Standards code of practice BS8201, BS8203, BS5325 and US standard ASTM F2420: suggests that a concrete floor or screed should be sufficiently dry to allow installation of a resilient floor covering using the insulated impermeable hood method. Non-destructive moisture content tests with the Tramex CME can be carried out until the floor or screed reaches the moisture level specified by the floor-covering manufacturer. The Tramex CME can be used to determine the areas of greatest concern on the floor or screed. At that stage relative humidity tests can be implemented to corroborate the non-destructive moisture content test.
PRE-TEST CONDITIONING AND PREPARATION
For best and most accurate results, tests should be carried out after the internal conditions of the building in which the slab is located have been at normal service temperature and humidity for at least 48 hours. All artificial heating or drying equipment should be turned off at least 96 hours before final readings are attempted, otherwise results may not accurately reflect the amount of moisture present or moisture movement in the slab during normal operating conditions. Avoid testing in locations subject to direct sunlight or sources of heat. Use of artificial aids for accelerated drying of concrete is not recommended. If they are being used it is recommended they should be turned off at least four days before taking final readings. It is advantageous to know the background of the site e.g. when the floor or screed was poured, thickness levels, etc.
- Before positioning the Hygrohood on the floor slab, the surface should be clear of any foreign materials and swept clean of any dust or loose materials that could affect a proper seal between the hood and the surface of the floor.
- Using butyl tape, seal the insulated Hood to the concrete surface.
- Leave the Hygrohood for 72hours to acclimatise. Ensure that a plug is left in the central hole whilst the hygrohood is acclimatising.
- After 72 hours test the humidity of the concrete by removing the plug and placing a humidity probe into the hole.
- Take the reading.
This hygrohood (RHIH) is to be used with a CMExpert Kit or an MRH Kit.
This Hygrohood comes with a roll of butyl tape