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ProBoard Ultra GPS Graphite Polystyrene Insulation

ProBoard Ultra is a graphite-enhanced polystyrene (GPS) board that delivers higher R-value per inch than standard EPS — making it ideal for continuous insulation applications where wall thickness is limited. Lightweight, vapor-permeable, and easy to work with. Available in R-4.6 through R-18.4, 1 in. to 4 in. thick.

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ProBoard Ultra GPS 0.59 in. x 2 ft. x 8 ft. R-3 Squared Edge Graphite EPS Rigid Foam Board
3
0.59 × 24 × 96
GPS10

ProBoard Ultra GPS 0.59 in. x 2 ft. x 8 ft. x 24 x 96

R-Value
3
Size
0.59
Price
$12.04
Details
ProBoard Ultra GPS 0.59 in. x 4 ft. x 8 ft. R-3 Squared Edge Graphite EPS Rigid Foam Board
3
0.59 × 48 × 96
GPS10

ProBoard Ultra GPS 0.59 in. x 4 ft. x 8 ft. x 48 x 96

R-Value
3
Size
0.59
Price
$20.93
Details
ProBoard Ultra GPS 0.75 in. x 2 ft. x 8 ft. R-3.8 Squared Edge Graphite EPS Rigid Foam Board
3.8
0.75 × 24 × 96
GPS10

ProBoard Ultra GPS 0.75 in. x 2 ft. x 8 ft. x 24 x 96

R-Value
3.8
Size
0.75
Price
$14.25
Details
ProBoard Ultra GPS 0.75 in. x 4 ft. x 8 ft. R-3.8 Squared Edge Graphite EPS Rigid Foam Board
3.8
0.75 × 48 × 96
GPS10

ProBoard Ultra GPS 0.75 in. x 4 ft. x 8 ft. x 48 x 96

R-Value
3.8
Size
0.75
Price
$24.78
Details
ProBoard Ultra GPS 1 in. x 2 ft. x 8 ft. R-5 Squared Edge Graphite EPS Rigid Foam Board
5
1 × 24 × 96
GPS10

ProBoard Ultra GPS 1 in. x 2 ft. x 8 ft. x 24 x 96

R-Value
5
Size
1
Price
$15.50
Details
ProBoard Ultra GPS 1.5 in. x 2 ft. x 8 ft. R-7.5 Squared Edge Graphite EPS Rigid Foam Board
7.5
1.5 × 24 × 96
GPS10

ProBoard Ultra GPS 1.5 in. x 2 ft. x 8 ft. x 24 x 96

R-Value
7.5
Size
1.5
Price
$20.36
Details
ProBoard Ultra GPS 2 in. x 2 ft. x 8 ft. R-10 Squared Edge Graphite EPS Rigid Foam Board
10
2 × 24 × 96
GPS10

ProBoard Ultra GPS 2 in. x 2 ft. x 8 ft. x 24 x 96

R-Value
10
Size
2
Price
$24.01
Details
ProBoard Ultra GPS 1 in. x 4 ft. x 8 ft. R-4.9 Squared Edge 25 PSI Graphite EPS Rigid Foam Board
4.9
1 × 48 × 96
GPS25

ProBoard Ultra GPS 1 in. x 4 ft. x 8 ft. x 48 x 96

R-Value
4.9
Size
1
Price
$26.90
Details
ProBoard Ultra GPS 1.5 in. x 2 ft. x 8 ft. R-7.3 Squared Edge 25 PSI Graphite EPS Rigid Foam Board
7.3
1.5 × 24 × 96
GPS25

ProBoard Ultra GPS 1.5 in. x 4 ft. x 8 ft. x 24 x 96

R-Value
7.3
Size
1.5
Price
$20.36
Details
ProBoard Ultra GPS 2 in. x 4 ft. x 8 ft. R-9.6 Squared Edge 25 PSI Graphite EPS Rigid Foam Board
9.6
2 × 48 × 96
GPS25

ProBoard Ultra GPS 2 in. x 4 ft. x 8 ft. x 48 x 96

R-Value
9.6
Size
2
Price
$24.01
Details
ProBoard Ultra GPS 1 in. x 4 ft. x 8 ft. R-4.6 Squared Edge Graphite EPS Rigid Foam Board Insulation
R-4.6
1 in × 4 ft × 8 ft
GPS

ProBoard Ultra — 1 in. R-4.6 x 4 ft. x 8 ft.

R-Value
R-4.6
Size
1 in
Price
$26.90
Details
ProBoard Ultra GPS 1.5 in. x 4 ft. x 8 ft. R-6.9 Squared Edge Graphite EPS Rigid Foam Board Insulation
R-6.9
1.5 in × 4 ft × 8 ft
GPS

ProBoard Ultra — 1.5 in. R-6.9 x 4 ft. x 8 ft.

R-Value
R-6.9
Size
1.5 in
Price
$35.29
Details
ProBoard Ultra GPS 2.06 in. x 4 ft. x 8 ft. R-9.2 Squared Edge Graphite EPS Rigid Foam Board Insulation
R-9.2
2.06 in × 4 ft × 8 ft
GPS

ProBoard Ultra — 2.06 in. R-9.2 x 4 ft. x 8 ft.

R-Value
R-9.2
Size
2.06 in
Price
$41.57
Details