Damp Floor Under Posts

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 floor under posts.

Hopefully there is an image attached below. When tile flooring feels damp and no liquid has been spilled on it it s likely condensation that has formed on the tile surface. Typically the posts are eight foot adjustable devices that can be placed under a sagging beam or floor joist. 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.

Inspect the sub floor area in as many locations as possible shine a torch through vents. The floor is quite level other than the 1mm difference where the bitumen is. This is because damp rising up through concrete floors is a pretty common issue. 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. I have read through all i think the parquet damp concrete sub floor threads in this forum and picked up some great information. Dig up the old concrete floor install a new damp proof membrane and lap up edges before replacing the concrete slab. Damp proof membranes are routinely used during the construction of a concrete floor.

Fully isolate the dampness in the floor using a surface damp proof membrane dpm damp proofing concrete floors above ground damp proofing for extensions. The earth level under the house should be well under floor level to give adequate sub floor airflow. 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.

Should there be a white cream fungus material growing on the soil or on the bricks then the sub floor area is very damp.