Drainage Mat Under Concrete Slab

Fill all voids that exceed 2 5 1 cm wide by 1 2 54 cm deep with concrete grout fill smaller voids with dymonic 100 or paramastic.

Drainage mat under concrete slab.

An integral subsurface drainage component provides for elimination of infiltrated water. Armordrain 400 drainage mats are designed to provide drainage in extreme cases involving heavy loads or heavy traffic such as under slabs planters retaining walls bridge abutments foundation walls and roof gardens. Pea stone is also commonly used which also provides the added function of improved drainage. They perform a multi faceted role by providing protection for roofpro and sikalastic 320 ns sl membranes as well as a means of collecting and conveying excess water in plaza decks split slabs planters roof gardens and other roofing and waterproofing applications.

Fill slab the fill slab is anything that occupies space on the plaza deck above the membrane and below the wearing surface. Concrete strength also comes into play but most slab concrete is around 3000 to 4000 psi so it s not a major factor. Shotcrete with concrete steel piles. This system is designed for use over roof waterproofing membranes.

Typically if you were to excavate your floors to do the drain repair under your slab you should expect to pay about 450 per linear foot. In addition to protecting floor finishes and indoor air quality underseal underslab membrane also acts as a barrier to methane and radon gas. Underseal underslab membrane is a tough 85 mil pre concrete pour waterproofing membrane vapor barrier designed to virtually eliminate water and vapor transmission through concrete slabs on grade. Plaza and deck system eliminates the dead load problems 50 lbs ft2 245 kg m2 and high haulage placement costs associated with conventional gravel drain beds.

Plaza and deck provides a thin lightweight weather and frost resistant installation for ceramic tile pavers brick or stone. Sika drainage mat 420 and 720 sika drainage mat 420 and 720 consist of an impermeable high flow dimpled polypropylene drainage core heat bonded to a layer of non woven polypropylene 420 or woven polypropylene 720 filter fabric on the top side and a polyethylene membrane protection film on the bottom side. Any protrusions should be removed. The weaker the subgrade or the heavier the loads then the thicker the slab needs to be.

Drainage mat is principally designed to reduce hydrostatic head pressure and direct water to a perforated drainage system. The heavy fabric prevents rocks and dirt coming entering the drainage channels. Trenchless drain repair under your slab costs about a 150 per linear foot and takes about two days to do as opposed to two weeks for excavation for drain repair under the slab. Historic fill slabs typically involve the use of graded sand asphalt material pea gravel or a sand cement mortar setting bed.

The tensile strength of concrete is typically taken as 10 to 15 of the compressive strength so only about 400 or 500 psi.