Damp Floor Under Posts

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.

Damp floor under posts.

Dig up the old concrete floor install a new damp proof membrane and lap up edges before replacing the concrete slab. Hopefully there is an image attached below. The earth level under the house should be well under floor level to give adequate sub floor airflow. 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. Damp proof membranes are routinely used during the construction of a concrete floor. A damp proofing concrete floor solution is particularly important. This is because damp rising up through concrete floors is a pretty common issue.

When faced with damp in concrete floors there are two options available. A basement post is usually installed to counteract a sagging frame in a wood frame house. 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. Fully isolate the dampness in the floor using a surface damp proof membrane dpm damp proofing concrete floors above ground damp proofing for extensions.

Typically the posts are eight foot adjustable devices that can be placed under a sagging beam or floor joist. 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. The floor is quite level other than the 1mm difference where the bitumen is. This often happens with porcelain and ceramic tiles.

Inspect the sub floor area in as many locations as possible shine a torch through vents.