Insulation Under Concrete Slab

Depending on the use of the building the slab can then be finished ready for use or receive a screed suitable for a floor finish.

Insulation under concrete slab.

Slabs that include embedded hydronic tubing for radiant heat always need a continuous layer of horizontal insulation under the entire slab. Rigid insulation concrete products like foam sheeting are easily broken and must be used with an extra vapor barrier plus standard foam or polystyrene concrete insulation does not stop radiant heat loss or gain. Additional insulation is applied along the edges of the slab because that is a primary surface for heat loss. Continuous insulation extends downward from the top of the slab and along the entire perimeter and completely covers the entire area under the slab.

Ecofoil under slab insulation is superior to traditional outdated forms of concrete floor insulation such as polystyrene or foam sheets. If your slab is heated it s a good idea to increase the r value of the vertical and the horizontal insulation to at least r 20. For under slab applications the rigid foam insulation typically should be installed over a gravel base with a poly vapor diffusion retarder between the gravel and insulation. Unitherm is made from unipoly a light weight moulded polystyrene material with exceptional thermal insulation properties.

Under slab insulation up site admin 2020 07 16t01 50 20 00 00 a durable and energy efficient solution for insulation applications and the ideal material to stop energy loss at the foundation slab. Cement 3 concrete 4 existing drywall 2 plywood 5 wood 3 sheathing type. Faced 2 unfaced 3 insulation features. Under slab 5 more ways to filter.

If the insulation is going below the slab the damp proof membrane dpm is laid next followed by the insulation a polythene separating layer and the concrete slab. Water resistant rigid board for under concrete slab insulation and slab support in traffic bearing applications. Eps 3 xps 2 faced or unfaced. The reflectix concrete slab insulation is an innovative easy to handle product that increases the energy efficiency of radiant floor and snow melt systems under concrete.

Get free shipping on qualified under slab foam board insulation or buy online pick up in store today in the building materials department. Adding insulation under the concrete floor requires the same skill set and equipment as forming and pouring the concrete slab. Step 1 excavate the area under the slab to 12 inches below the planned level of the top of the slab.