Exterior Boards

Water Resistant
No need to replace them in case of water damage - just let them dry.
Fire Resistant
This material is non-flammable.
Impact Resistant
Requires fewer repairs and touch-ups.
Mold Resistant
Mold and mildew cannot develop due to their anti-microbial composition.
Termite Resistant
Termites and rodents do not feed off this inert material.
Their dimensional properties remain stable under a wide range of temperature and humidity variances.
Their homogenous composition does not allow for delamination, increasing their durability and resistance.
Soundproofing Properties
Due to their high density, the boards contribute to decreasing and attenuating sound transfer.
Structural Properties
No need for blocking - cabinets and other elements can be fixed directly to the wall and they can be used in structural assemblies.


Overview:  KLEAN BOARD for Exterior Walls are available in several thicknesses: 06mm, 12mm or 15mm

These boards were developed to offer an incomparable resistance to impacts and abuse.  They can be used as sheathing or a finishing board. They are fire - mold - mildew - rodent - insect resistant.  They do not delaminate.  The edges are straight and even.  They are square and joints can be finished with a fibreglass tape and a cement compound.  The boards are tested according to ULC S101-07, with a 60 minutes (1-hour) fire resistance.  *These boards MUST be sealed with a manufacturer approved sealing product.

Properties: Exterior board can be used as sheathing or a finishing board

  • Impact and abuse resistant
  • Fire resistant : 60 minutes
  • Mold and mildew resistant
  • Rodent and termite resistant

Tested:  ASTM E119-12 & CAN/ULC S101-07

  • 60 minutes (fire resistance, non combustion characteristics, surface combustion)

ASTM E84 & UL723/ULC S102

  • Flame spread index = 0
  • Smoke developed index = 0
  • Class A

Physical data

Thickness Weight
06mm (1/4") 0.593 kg (1.304 lbs)/sq. ft.
12mm (1/2") 1.187 kg (2.612 lbs)/sq. ft.
15mm (5/8") 1.468 kg (3.231 lbs)/sq. ft.
Dimensions Edges
1220 x 2440 (4' x 8') Square
1220 x 2743 (4' x 9')
1220 x 3050 (4' x 10')
Fire resistant
Impact resistant
Mold resistant
Termite resistant