Installation

What kind of primer do I use with ultralight?


You can stick the insulation boards to the concrete slab using regular modified or pre-mixed thin set. We recommend a 1/4 x 1/4” trowel.

What kind of adhesive do I use with Ultralight?


You can stick the insulation boards to the concrete slab using regular modified or pre-mixed thin set. We recommend a 1/4 x 1/4” trowel.

Can you self-level over ultralight?


You can stick the insulation boards to the concrete slab using regular modified or pre-mixed thin set. We recommend a 1/4 x 1/4” trowel.

Installing insulation boards over a Wooden Subfloor


There is a specific way to install the insulation boards over a wooden sub-floor.  Click “Read More” to learn how.

Warmup Insulation Board Installation Video


See just how easy it is to install our floor heating insulation boards. Click here to watch.

Insulation Boards: Preparing for the Installation of Floor Heating


All surfaces should be thoroughly cleaned of all dirt and debris. When installing over an existing concrete base, it is important to remove all traces of existing finishes, contamination, etc. to allow for a clean surface.

Installing insulation boards over a Concrete Subfloor


When installing over cement, screws and washers are not necessary. You will first use a trowel to put down a modified mortar. Then you will stagger the boards and press them together.

Make sure that the floor probe that came with the floor heating thermostat was installed and done so properly.


It is vital that the floor heating thermostat’s floor probe was not only installed but done so the right way.  Click “Read More” for details.

Basic Installation of the In-slab Floor Heating Cable


For thicker pour of up to 6”, elevate the wire mesh on which the cable is tied with bricks, wood blocks or other spacers to float the cable at the desired level. Depending on the construction of the subfloor and in general, in order to improve the efficiency of the system, you may need to apply insulation prior to the pour.

Should I install the WIU with the foil side up or down?


WIU should be installed with the foil side facing DOWN. Click “Read More” for details. 

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