Insulation Under Concrete Slab

Walls foundations roof and roof decks air distribution ceilings interior solutions mechanical pipe.

Insulation under concrete slab.

Cement 3 concrete 4 existing drywall 2 plywood 5 wood 3 sheathing type. Water resistant rigid board for under concrete slab insulation and slab support in traffic bearing applications. 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. 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.

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. Eps 3 xps 2 faced or unfaced. Slabs that include embedded hydronic tubing for radiant heat always need a continuous layer of horizontal insulation under the entire slab. Get free shipping on qualified under slab foam board insulation or buy online pick up in store today in the building materials department.

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. Additional insulation is applied along the edges of the slab because that is a primary surface for heat loss. Under slab 5 more ways to filter. Continuous insulation extends downward from the top of the slab and along the entire perimeter and completely covers the entire area under the slab.

The f factors for slab on grade floors are defined in standard 90 1. The foil within the product acts to spread out the heat signature of the heating coils. 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. 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.

Faced 2 unfaced 3 insulation features. Step 1 excavate the area under the slab to 12 inches below the planned level of the top of the slab. Adding insulation under the concrete floor requires the same skill set and equipment as forming and pouring the concrete slab.