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Quad-Lock ICF Panels

Quad-Lock panels are 48" [1218mm] long, 12" [305mm] high and are available in different thicknesses and with optional Fastening Strips:

2" Panels are 2¼" [57mm] thick and are only recommended for use by experienced Quad-Lock installers or for short stem walls.

3" Panels are 3.125" [79mm] thick and about 20% stronger than 2" panels with 27% more insulation value.

4" PLUS Panels are 4¼" [108mm] thick and have been developed for walls requiring even higher insulation values.

Optional Fastenings Strips ("FS") provide a continuous anchoring surface for exterior cladding/lapped siding (e.g. vinyl or fiber-cement siding) where needed. They are 1½" [38mm] wide strips made of strong ABS plastic, molded into the panels every 12" [305mm]. Located 2" [51mm] to the left of one end and all deep grooves in FS panels, they extend to the panel's surface in small spots for easy identification. Quad-Lock Ties are locked into the fastening strips to create an uninterrupted vertical fastening surface (no breaks or gaps to complicate siding installation). FS panels can be used in select locations or on one or both sides of the walls as needed.

2" FS Panels have the same dimensions as the 2" Panels, but feature the Fastening Strips.

4" PLUS-FS Panels have the same dimensions as the 4" PLUS Panels and also contain the Fastening Strips.

The above panels all have interlocks along their top and bottom with molded slots every 2" [51mm] to interlock panels with Quad-Lock Ties, ensuring every panel will align with precision. Panels are lightly scored every 2" [51mm] to make measuring and cutting easy. Every 12" [305mm] panels have a heavier groove to mark the placement of the ties.

Quad-Lock Extra Panels are 4" [102mm] thick and can be added in one or more layers to the inside of the exterior panel layer of any standard Quad-Lock ICF wall during construction.

All Quad-Lock panels are molded of fire retardant Expanded Polystyrene (EPS). EPS is a closed-cell, foamed insulation that has a zero ozone depletion rating since it does not, and never did, contain CFCs or HCFCs. EPS is inert and chemically stable and will not emit any gases into homes or commercial buildings under normal use. In fact, EPS is considered to be world class insulation with qualities that make it impervious to time and moisture.

Using combinations of Quad-Lock panels, many different insulation values are possible, giving you the choice of true R-Values of 22, 28, 30, 38, 43, 45, 53, and 59 (h*ft²*°F/BTU).

EPS Panel Configurations & R-Values

Quad-Lock panels are made of fire retardant Expanded Polystyrene (EPS). EPS is considered to be world class insulation with qualities that make it impervious to time and moisture. The R-Values below were calculated per ASTM standard C518 at 75˚F (one of the very few methods allowed by FTC regulations). Note that the ASHRAE Handbook allows using higher and more accurate R-Values for EPS, especially under colder conditions, in contrast to some other insulation materials that perform worse than advertised when heating or cooling is actually required.

Product selection is easiest with the Online Estimator or use the below table:

Insulation Value1	Concrete Cavity2	Total Wall Width	QPX2 2¼"	QPX3 3.125"	QPX2 PLUS 4¼"	QP Extra 4"	FTB  4	FTB  6	FTY  8	FTG 10	FTR 12	FTB 14	XT  12
R-22 U-0.28	6" [150mm]	10¼"	2X					X
	8" [200mm]	12¼"							X
R-28 U-0.21	6" [150mm]	12¼"		2X					X
	8" [200mm]	14¼"								X
R-30 U-0.20	6" [150mm]	12¼"	X		X				X
	8" [200mm]	14¼"								X
R-38 U-0.15	6" [150mm]	14¼"			2X					X
	8" [200mm]	16¼"									X
R-38 TMO U-0.15	6" [150mm]	14¼"	2X			X				X
	8" [200mm]	16¼"									X
R-43 U-0.14	6" [150mm]	16¼"		2X		X					X
	8" [200mm]	18¼"										X
R-45 U-0.13	6" [150mm]	16¼"	X		X	X					X
	8" [200mm]	18¼"										X
R-53 U-0.11	6" [150mm]	18¼"			2X	X						X
	8" [200mm]	20¼"					X						X
R-53 TMO U-0.11	6" [150mm]	18¼"	2X			2X						X
	8" [200mm]	20¼"					X						X
R-59 U-0.09	6" [150mm]	20¼"		2X		2X	X						X
	8" [200mm]	22¼"						X					X

Example: You want to build an R-43 wall with an 8" [200mm] concrete cavity: you will need QPX3 (3" Panels) on both sides of the wall, one QPEXTRA (Extra Panels), and FTB14 (Brown 14" Ties).
Notes: TMO = Thermal Mass Optimized ; Disclaimer: Thickness of EPS foam on the building's interior should not exceed 4" unless approved by a licensed engineer and building officials. Some configurations / insulation thicknesses may not be approved by local building codes without an engineer's approval - see Guide to Code Compliance.

¹ All stated R-Value calculations contain R-2.66 for: inside air, 0.5" gypsum wall board, 6" concrete, 5/8 T1-11 Finish and outside air.
² Nominal Concrete Thickness (actual thickness can be ¼" [6.35mm] less); many more thicknesses are available but not shown - see Online Estimator.