NEW Memory Foam Pillow
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Christmas Rush
Its a great time of year when the sun comes out and the outdoor life is more inviting.
At...
Exciting New Product
Foam Sales is pleased to introduce to the W.A. market, Phenolic Foam, is our new...
Fabric Special
Take Advantage of Our Outdoor Canvas Special
Due to a bulk purchase of UV Resistant...
Thermal Resistance of Expanded Polystyrene ('R' Values)
|
Required ' R' Values |
||||||
|
Thickness |
L Grade |
SL Grade |
S Grade |
M Grade |
H Grade |
VH Grade |
|
10mm |
0.20 |
0.23 |
0.23 |
0.24 |
0.25 |
0.26 |
|
13mm |
0.26 |
0.29 |
0.30 |
0.31 |
0.33 |
0.33 |
|
20mm |
0.40 |
0.45 |
0.47 |
0.48 |
0.50 |
0.51 |
|
25mm |
0.50 |
0.57 |
0.59 |
0.60 |
0.63 |
0.64 |
|
30mm |
0.60 |
0.68 |
0.70 |
0.72 |
0.75 |
0.77 |
|
40mm |
0.80 |
0.90 |
0.94 |
0.96 |
1.00 |
1.02 |
|
50mm |
1.00 |
1.13 |
1.17 |
1.20 |
1.25 |
1.28 |
|
60mm |
1.20 |
1.36 |
1.40 |
1.44 |
1.50 |
1.54 |
|
70mm |
1.40 |
1.58 |
1.64 |
1.68 |
1.75 |
1.79 |
|
75mm |
1.50 |
1.70 |
1.76 |
1.80 |
1.88 |
1.92 |
|
80mm |
1.60 |
1.81 |
1.87 |
1.92 |
2.00 |
2.05 |
|
90mm |
1.80 |
2.03 |
2.11 |
2.16 |
2.25 |
2.30 |
|
100mm |
2.00 |
2.26 |
2.34 |
2.40 |
2.50 |
2.56 |
|
Required Thickness in mm |
||||||
|
R Value |
L Grade |
SL Grade |
S Grade |
M Grade |
H Grade |
VH Grade |
|
1.0 |
50 |
45 |
45 |
45 |
40 |
40 |
|
1.5 |
75 |
70 |
65 |
65 |
60 |
60 |
|
2.0 |
100 |
90 |
85 |
85 |
80 |
80 |
|
2.5 |
125 |
115 |
110 |
110 |
100 |
100 |
|
3.0 |
150 |
140 |
130 |
130 |
120 |
120 |
| 30mm Thickness | 50mm thick | 75mm thick | 100mm thick |
| 1.00 | 1.66 | 2.5 | 3.33 |
Note : This is K value at 24 degrees celcius.
To increase R value we can laminate an albar foil sheet to the polystyrene. Each layer will increase R value by .20. Lamination is available on top and bottom of the sheet only