Floor Measurement Top Of Slab To Top Of Slabs

Did the builder forget to install poly under the slab.

Floor measurement top of slab to top of slabs.

To test for an incompatible product on the slab an easy method is to put a few drops of water on the slab. This vinyl type comes in a single sheet that is installed over the concrete floor. The calcium chloride test or mver has been shown to measure moisture conditions in the top inches of the slab only. For example a floor with an f f measurement of 60 is twice as flat as a floor with an f f of 30.

As with f l the measurements are linear and higher numbers represent a flatter 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. Do not exclude formwork intersected by beam ends. 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.

F f numbers can be taken for slabs on grade as well as elevated slabs. That s why builders rarely install 6 mil poly on top of a slab. Felts understands that one dry spot in the slab doesn t mean it is ready for the finished floor. We aim to reduce the weight of the slabs to bring down costs reduce transport loads and craneage where possible.

Slab measured across wall. These factors can introduce a lot of moisture variability across the floor slab. 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. Open top of wall.

Wall measured through slab. Who installed your radiant floor slab. 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. Because concrete likes water the drops should absorb into the slab.

Several types of vinyl flooring may work better for different concrete floors. Top of slab above i e. 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. A vinyl sheet may be forgiving if your concrete slab isn t perfectly even.

Most residential slabs have a layer of 6 mil poly or a similar thicker vapor barrier membrane directly under the slab. Soffit of transfer structure slab or beam above. Floor flatness tends to be very important for spaces where equipment must be set perfectly. Exclude formwork intersected by slabs.

Even if the builder forgot to install poly under the slab there. If they bead up on top of the slab it is probably contaminated.