Warmup UltraLight Insulation sheet 39”x27”x1/4” for floor heating systems(10 pc min order)

Vendor: Warmup
Subtotal: CA$37.72

Warmup UltraLight™ Insulation Board 1/4" thick x 39" x 27" (Minimum order quantity of 10 pcs)

Warmup's NEW insulation is a Strong, Flexible, and Lightweight addition to any floor heating project; this 3-in-1 solution improves efficiency, lets your floor get warm faster, and pays for itself many times over the life of your floor.

UltraLight dramatically reduces heat-loss, keeping the warmth in the floor and room, saving energy and money when installed under your floor heating mat or cable.

Simply spread thinset mortar with a 1/4 x 1/4 Square notch trowel & set the boards in mortar staggering the joints. Allow the thinset to cure before installing floor heating on top. If you plan to use a leveling compound over Ultralight, add Warmup Perimeter Strip to the edge of the room to allow for differential movement between the finished floor level and walls.

Each sheet covers 7.3 Sq Ft and weighs only 1.5 lbs yet has a compressive strength of 32 PSI

Suitable for use with all electric radiant floor heating systems, Warmup's UltraLight is a specialized multi-layer design consists of PEF insulation sandwiched between aluminum and non-woven fleece, works to achieve 3-in-1 benefits: insulating, heat spreading, and decoupling. The final top layer of non-woven fleece allows thin-set to bond.

The rapid thermal response promoted by the PEF insulation and diffusion layer allows the flooring to heat up faster, resulting in a more energy-efficient and comfortable heated floor.



  • Warmup Insulation is a very efficient thermal barrier that increases efficiency and saves you money 
  • They reflect heat into the floor tile and minimize heat transfer to a concrete slab below.
  • Does not absorb water (0.052% w/w) or support mold growth