Damp Floor Under Posts

Hopefully there is an image attached below.

Damp floor under posts.

This often happens with porcelain and ceramic tiles. When faced with damp in concrete floors there are two options available. Should there be a white cream fungus material growing on the soil or on the bricks then the sub floor area is very damp. Damp proof membranes dpms a damp proof membrane or dpm is a waterproof barrier that s introduced between your sub floor and your wood floor.

A basement post is usually installed to counteract a sagging frame in a wood frame house. Damp proof membranes are routinely used during the construction of a concrete floor. However typically these are often fairly thin and are sometimes damaged even before they are laid. A damp proofing concrete floor solution is particularly important.

Dig up the old concrete floor install a new damp proof membrane and lap up edges before replacing the concrete slab. If the tile surface is cooler than the warm humid room air the moisture inside the air becomes the dampness on the floor tile when the warm air and cool floor meet. Typically the posts are eight foot adjustable devices that can be placed under a sagging beam or floor joist. Fully isolate the dampness in the floor using a surface damp proof membrane dpm damp proofing concrete floors above ground damp proofing for extensions.

I have read through all i think the parquet damp concrete sub floor threads in this forum and picked up some great information. Effectively a thick plastic sheet a damp proof membrane dpm is used to create a barrier between a concrete or screed subfloor and a wood floor. This is because damp rising up through concrete floors is a pretty common issue. The floor is quite level other than the 1mm difference where the bitumen is.

They are made from metal and have an adjustable screw top that can be raised to fit the space between the floor and ceiling of the basement.