Define Porous Sub Floor

The biggest complaint against osb is that it doesn t handle moisture very well so it is more.

Define porous sub floor.

The absorption coefficients of materials are commonly determined through use of standardized testing procedures. Nonporous not porous. A matter which is porous or contains pores which are able to absorb liquid. If the water beads up rather than absorbs into the surface it is non porous.

Subfloors which are porous are normally concrete and wood. If the water is quickly absorbed the surface is porous. If there is any doubt as to the porosity of a subfloor put a few drops of water on the surface. Examples of porous surfaces include cardboard paper and untreated wood.

The noise reduction coefficient is the arithmetic average rounded to the nearest multiple of 0 05 of the absorption coefficients for a specific material and mounting condition determined at the octave band center frequencies of 250 500 1000 and 2000 hz. Especially not having vessels that appear as pores. Non porous subfloors include sealed concrete concrete with curing compounds ceramic tile terrazzo and natural stone surfaces. Glass plastics and processed metals are produced by melting the basic ingredients and then cooling them down creating a uniform surface with no cavities.

What is luan wood. Liquid beads up on the surface of nonporous substrates which are typically existing resilient flooring. A porous substrate is one which is capable of absorbing water or liquid such as concrete or wood. Luan also spelled lauan refers to a tropical hardwood plywood product usually made from trees in the shorea family.

Porous means containing pores ie small or tiny hole while non porous means without pores or holes. If the water remains on the surface the surface is. Porosity is defined by the spaces within the material s surface. The easiest way to tell if the subfloor is non porous is to sprinkle it with water.

If there is any doubt as to porosity of the substrate it can be checked easily by placing a few drops of water on the surface.