Layering Ultralight Insulation Boards: Is it Possible? Ultralight cannot be layered because the thickness will double of amount of movement under the tile which means the floor will not meet the declared wear ratings. Pro Tip: If you need to add more height to the floor, use leveler to prepare the floor as needed, […]
Preparing for your project
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.