Foldable Insulation
Lexar Fanfold (FF) is a non-structural, rigid insulation board made from closed cell Expanded Polystyrene (EPS) with a laminated facer on both sides offering cost effective performance. The boards are lightweight and easy to install allowing for quick installation for increased labor savings. Designed to be installed as continuous insulation, reduce thermal bridging and directly improve building envelope performance. Lexar Fanfold can be used in both new and retrofit for residential, commercial, and institutional applications.
Lexar Advantage
The fastest installing underslab insulation on the market due to:
- Our 4’x24′ fanfold design
- Treated to resist bugs and termites
- 6 inch gridlines to help place rebar and radiant tube heat
- An attached 6 mil vapor barrier
Availability
Lexar’s Fanfold insulation is made as one continuous sheet 4′ wide and standard 24′ long covering a total of 96 sq ft (18.6m2). The insulation is packaged accordion style with individual panels within the fanfold measuring 4’×4′. Boards can be manufactured in a variety of densities and are available in thicknesses from 3/8″ to 2 and 3/8″, with 2″ as our standard thickness.
Applications
- Exterior above grade insulation
- Roof cover board
- Level uneven surfaces
- Siding underlayment
- Interior below grade insulation
- Foundation perimeter skirting insulation
- Freezers and cold storage
Enhanced R-Value for Walls
R2.9 (RSI 0.51) can be added to any of the Fanfold R-Values listed in the table above by ensuring that a 3/4″ (19mm) sealed air space is added in front of the board with a reflective facer. Based on data from 2021 ASHRAE Handbook of Fundamentals, Chapter 26.14 -Table 3.
Enhanced R-Value for Roofs
R1.7 (RSI 0.30) can be added to any of the Fanfold R-Values listed in the table above by ensuring that a 3/4″ (19mm) sealed air space is added in front of the board with a reflective facer. Based on data from 2021 ASHRAE Handbook of Fundamentals, Chapter 26.14 -Table 3.