Drainage Mat Under Concrete Slab

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.

Drainage mat under concrete slab.

Prior to the installation of tremdrain series drainage mat make sure the wall is clean of all dirt. Historic fill slabs typically involve the use of graded sand asphalt material pea gravel or a sand cement mortar setting bed. Shotcrete with concrete steel piles. 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. 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. 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.

Pea stone is also commonly used which also provides the added function of improved drainage. A protection course is a puncture resistant material designed to minimize or prevent possible damage to the waterproofing membrane prior to or during concrete pour and backfilling. 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. Fill slab the fill slab is anything that occupies space on the plaza deck above the membrane and below the wearing surface.

The weaker the subgrade or the heavier the loads then the thicker the slab needs to be. 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. Drainage mat is principally designed to reduce hydrostatic head pressure and direct water to a perforated drainage system. This system is designed for use over roof waterproofing membranes.

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. Sika drainage mat composites are available in both high flow dimpled core and high crush resistant geonet constructions. 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. Concrete strength also comes into play but most slab concrete is around 3000 to 4000 psi so it s not a major factor.

An integral subsurface drainage component provides for elimination of infiltrated water.