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
ASTM C 518
(@ 75ºF Mean Temperature)
Thermal Conductivity
ASTM C 518
(@ 75ºF Mean Temp., k)
Water Vapor Permeance
ASTM E 96 0.6
Water Absorption
(Max.% by Volume)
ASTM C 272


Compressive Strength
(psi @ 10% Deflection)
ASTM D 1621 16
Fire Characteristics2
Flame Spread
Smoke Developed
ASTM E 84/UL 723 25
Max Recommended
Use Temp. (ºF)
(lbs./1,000 sq.ft.)
Dimensions / Packaging
Thickness (Nominal) 1/4"
Bundle Dimensions 4' x 50'
Square Feet/Bundle 200
Bundles/Pallet 45
Square Feet/Pallet 9,000

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

CCMC 12722-L

Canada - Evaluation Listing CCMC 12722-L - XPS Insulation Board

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

Siding Underlayment, Sheathing & Roofing Cover Board Safety Data Sheet

Do you need assistance planning your project?

Our teams are dedicated to helping make the process as easy as possible and ensure you get the right materials for your needs.

Contact Us

Kingspan Insulation North America

Head Office & Sales Office – North America

Kingspan Insulation LLC

2100 Riveredge Parkway, Suite 175

Atlanta, Georgia



Call: +1(800) 241 4402

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