Floor Measurement Top Of Slab To Top Of Slabs

No surface test tells an installer how much moisture is present deeper within the concrete which is critically important as that moisture gradient will equalize if a non permeable floor covering is installed.

Floor measurement top of slab to top of slabs. Who installed your radiant floor slab. Because concrete likes water the drops should absorb into the slab. Astm f2170 rh testing inside the concrete slab the in situ rh test provides a numeric measurement of the moisture within a concrete slab using an rh sensor placed at a specific depth. A vinyl sheet may be forgiving if your concrete slab isn t perfectly even.

Several types of vinyl flooring may work better for different concrete floors. We aim to reduce the weight of the slabs to bring down costs reduce transport loads and craneage where possible. Do not exclude formwork intersected by beam ends. Exclude concrete at junctions with slabs of same concrete grade i e.

Wall measured through slab. That s why builders rarely install 6 mil poly on top of a slab. Floor flatness tends to be very important for spaces where equipment must be set perfectly. These factors can introduce a lot of moisture variability across the floor slab.

F f numbers can be taken for slabs on grade as well as elevated slabs. This vinyl type comes in a single sheet that is installed over the concrete floor. A range of sizes and configurations are possible with wide slabs so our designers ensure that each project is individually designed for application and loadings. As with f l the measurements are linear and higher numbers represent a flatter floor.

Additionally because this method only takes measurements at or near the slab s surface it has many of the same drawbacks as the cacl 2 test. Open top of wall. Slab measured across wall. Adhering to the astm standard and installing rh sensors every 1 000 square feet is the only way to go to ensure greatest testing reliability.

On commercial jobs raw slabs are frequently treated with sealers which may cause adhesion problems. To test for an incompatible product on the slab an easy method is to put a few drops of water on the slab. Did the builder forget to install poly under the slab. If they bead up on top of the slab it is probably contaminated.

Felts understands that one dry spot in the slab doesn t mean it is ready for the finished floor. The calcium chloride test or mver has been shown to measure moisture conditions in the top inches of the slab only. Most residential slabs have a layer of 6 mil poly or a similar thicker vapor barrier membrane directly under the slab. Top of slab above i e.

For example a floor with an f f measurement of 60 is twice as flat as a floor with an f f of 30. Even if the builder forgot to install poly under the slab there.