| ACFoam Supreme LTTR-Values & Thicknesses |
|
THICKNESS |
LTTR-VALUE |
RSI |
PCS/
PKG |
METAL
DECK FLUTE SPANABILITY |
|
IN |
MM |
IN |
MM |
|
.05
.75
1.0
1.5
1.8 |
12.70
19.05
25.40
38.10
45.72 |
-
-
6.2
9.3
11.20 |
-
-
1.09
1.64
1.97 |
-
-
48
32
26 |
-
-
-
4 3/8"
4 3/8" |
-
-
-
111.13
111.13 |
2.0
2.5
2.7
3.0
3.4 |
50.80
63.50
63.58
76.20
86.38 |
12.40
15.50
16.70
18.60
21.20 |
2.18
2.73
2.94
3.27
3.73 |
24
19
17
16
13 |
4 3/8"
4 3/8"
4 3/8"
4 3/8"
4 3/8" |
111.13
111.13
111.13
111.13
111.13 |
3.5
4.0
|
88.90
101.6
|
21.80
25.0
|
3.84
4.40
|
13
12
|
4 3/8"
4 3/8"
|
111.13
111.13
|
|
Long-term thermal resistance values were determined in accordance with CAN/ULC-S770. All test samples were third-party selected and tested by an accredited material testing laboratory. The R-value for .5 in. perlite (1.39) was provided by ASHRAE Handbook, Fundamentals. The R-value of .55 for 7/16 OSB was provided by APA-The Engineered Wood Association, which cited ASHRAE Handbook, Fundamentals. The R-value for .25 in. glass-mat gypsum board (.28 R-value) was provided by the glass-mat gypsum board manufacturer.
CAN/ULC-S770 does not apply to impermeably-faced (e.g., foil-faced) foam plastic insulation. A test method for determining LTTR values for impermeably faced foam plastic insulation is currently under development. Until such a test is available, Atlas has chosen to establish an interim LTTR value for Supreme based on LTTR test experience with permeably-faced products. Atlas recommends multi-layering when desired insulation thicknesses are greater than 2.7".
1"=25.4mm |
