New Specification Covers Protection Board Fortifications of Waterproofing
Picture the outside walls of a building standing 30 feet (9 m)
below ground during construction. Waterproofing is applied to
the exterior walls but when dirt is replaced, rocks or metal pieces
abrade the coating, causing a break in the waterproofing system.
Protection board applied to the outside walls prevents this abrasion.
Now available, ASTM D 6506, Standard Specification for Asphalt-Based Protection Board for
Below-Grade Waterproofing, describes Class A and B protection
board requirements, test methods, materials and manufacture, and
sampling for contractors specializing in waterproofing applications.
According to Charles Pratt, waterproofing and bituminous materials
consultant with Pratt Materials and Technical Consulting Services,
Valencia, Pa., the waterproofing of below-grade structures can
be assured by application of a suitable reinforced bituminous
membrane to the exterior concrete walls. Protection board such
as described in D 6506 is one of those suitable to be applied
to the outer surface of the waterproofing membrane system to safeguard
the waterproofing system from puncture or distortion during and
after backfilling around the building, he says.
Protection boards meeting ASTM Standard D 6506 are used on vertical
surface waterproofing systems that may be buried as much as 100
ft. (30 m) or more. They are also suitable for use in waterproofing
systems applied to plaza decks and similar applications.
D 6506 was developed by a task group of ASTM Subcommittee D08.22
on Waterproofing and Damproofing Systems, within Committee D08 on Roofing, Waterproofing and Bituminous Materials. The standard
was produced in response to requests from waterproofing systems
applicators and manufacturers, says Pratt, the chairman of Subcommittee
D08.22 who developed the standard with task group members from
the protection board manufacturing, waterproofing, and roofing
bituminous materials industries.
Weve seen waterproofing membranes 60, 70, 80 years old or more,
still holding water out, he concludes. We dont know necessarily
whether they had protection board on them. But we do know that
if you dont put protection board on, you usually have a good
chance of having a leak in a large job because of the problem
with the backfill.
Technical questions may be directed to Charles Pratt, Pratt Materials
and Technical Consulting Services, P.O. Box 352, Valencia, PA
16059 (724/898-2119). Committee D08 meets Dec. 3-6 in Orlando,
Fla. For meeting or membership details, contact manager Pat Picariello, ASTM (610/832-9720). //
Copyright 2000, ASTM