GreenGuard PB4 Waterproof Protection Board

Waterproofing Protection

GreenGuard PB4 Waterproofing Protection Board

After the waterproofing membrane is applied to the foundation, protect it from damage during backfilling with PB4 Waterproofing Protection Board. This durable extruded polystyrene (XPS) board has the compressive strength and impact resistance to withstand even the toughest load pressures. Its dense, closed-cell construction and tough plastic capsheets resist both moisture absorption and decomposition from long-term exposure to chemicals in the soil.

Product Information

Property Test Method PB4
Thermal Resistance, R-Value1
(@ 75ºF Mean Temperature)
Water Vapor Permeance
ASTM E96 0.6
Water Absorption
(Max.% by Volume)


Compressive Strength
(psi @ 10% Deflection)
ASTM D1621 16
Fire Characteristics2
Flame Spread
Smoke Developed
ASTM E84/UL 723 40 (Class A)
Max Recommended
Use Temp. (ºF)
(lbs./1,000 sq.ft.)
Dimensions / Packaging
Thickness (Nominal) 1/4"
Bundle Dimensions 4' x 50'
Bundles/Pallet 64
Square Feet/Pallet 12,800

1 pecimens were aged and tested in accordance with FTC Rule (16 CFR, Part 460).

2 These numerical flame spread and smoke ratings are not intended to reflect hazards presented by this material under actual fire conditions (foam only). See UL Classification Certificate A184.

GreenGuard PB4 Protection Board Product Sheet

GreenGuard PB4 Protection Board

GreenGuard Siding Underlayment, Sheathing & Roofing Cover Board Safety Data Sheet

Siding Underlayment, Sheathing & Roofing Cover Board Safety Data Sheet

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Kingspan Insulation North America

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Kingspan Insulation LLC

2100 Riveredge Parkway, Suite 175

Atlanta, Georgia



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