Technical Data Sheet

DUBOARD is a high quality, semi flexible bituminous board for use as protection course to waterproofing against long term exposure, backfill and damage caused by construction traffic, concreting and other subsequent works. DUBOARD is produced with a mix of bitumen compounds, stabilizers and modifiers and strengthened with a rot proof fabric reinforcement, providing superior puncture resistance and low deflection coefficient while maintaining a sufficient degree of flexibility to a accommodate normal site usage.


  • Tough: excellent resistance to puncture and normal site handling.
  • Robust: Withstands normal construction abuse and impact from backfilling operations.
  • Durable: Protects against exposure, construction traffic, concreting and other topping works.
  • Rot proof: Unaffected by permanent or periodic immersion in ground water.
  • Semi-flexible: Can be bent to normal contours while maintaining rigidity
  • Impermeable to water and with low vapor transmission: enhances water tightness.
  • Resistant to salts, chlorides and other chemicals normally found in the soil.
  • Stable at high temperature while retaining flexibility in cold weather.
  • Can be applied by adhesive or by torch (see installation section).

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DUBOARD is tested to ASTM and other relevant international standards.


Duproof is ISO 9001 Quality Assured Company and all DUBOARD carry a 10– year material warranty against any manufacturing defects.


DUBOARD are supplied in sheets of 1m X 2m, in standard thickness of 3 mm, 3.2 mm, 3.5 mm and 4 mm. Finished on both faces with polyethylene foils. For other thickness contact Duproof or local distributor.


Protection to waterproofing membranes and coatings in foundations, Floors, terraces, bridge decks, planters, etc. DUBOARD provides positive protection not only during construction activities and backfilling, but also at the time of later settlement.
DUBOARD is compatible with a wide range of waterproofing systems, including: All cold applied and hot applied bituminous sheet membranes and liquid applied systems.


Install DUBOARD continuously over the membrane, butting the joints. Cut DUBOARD sheets with a roofer’s knife as required obtaining complete coverage and a neat overall finish. For maximum protection all butt joints may be taped with a 50 mm wide PVC Tape. On vertical areas spot bond the boards with a compatible bituminous or neoprene adhesive, using temporary supports in place until backfilling operation. In horizontal areas spot bonding at corners and sides of the boards will be sufficient to avoid slippage during subsequent work over the boards.

Torching: In certain cases the boards can be lightly torched applied to the membrane for permanent fix. Consult Duproof or your local distributor for advice.

Backfilling: Concrete or application of toppings over the boards must begin as early as possible, after installation of DUBOARD. Backfilling must be carried out with care to avoid dragging the boards down.


DUBOARD boards are stacked on a pallet one over the other and stretch wrapped. Store on level ground under shade.


There are no health hazards associated with the normal usage. Wear gloves while handling to avoid injury; refer to the MSDS sheets for advice.


Nominal weight (approximately)[Kg / m2]
Dimensions (length / width)[m]2 / 1
CoatingPolymer modified bitumen


Softening Point[o C]ASTM D 36150
Bitumen Content (By Weight)%?60
Heat Resistance, 2 hrs. @120oCUEAtcNo Flow
Flexibility at 25oCUEAtcFlexible
Water Absorption%ASTM D 570< 0.4

Note: Tolerances on nominal values shown are as per UEAtc directives for polymer modified bitumen membranes. These data are correct at the time of printing but may be changed without prior notice subject to client`s requirements, availability of raw materials or other conditions. This data sheet supersedes all the previous publications pertaining to this product. All reasonable care has been taken in preparing this document, which to the best of our knowledge is accurate and true. Recommendations and suggestions are made in good faith and should only be considered for general guidance. No liability is assumed or taken by us in relation to the application, as usage conditions and any labor involved are beyond our control.

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