PROTECTION COURSE – Waterproofing Protection

Product Data, W. R. MEADOWS

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PROTECTION COURSE is a multi-ply, semi-rigid core composed of a mineral-fortified asphalt core formed between two outside layers of asphalt-impregnated reinforced mats, manufactured in accordance with ASTM D 6506.

When properly applied by personnel trained in good waterproofing techniques, PROTECTION COURSE will absorb the impact of aggregate shock and normal jobsite foot traffic. It also protects the membrane waterproofing from penetration by sharp aggregate during backfilling and later settlement. PROTECTION COURSE is available in two types: PC-2, Standard Duty and PC-3, Heavy Duty. Both types are economical and convenient to use.

PROTECTION COURSE is used in between slab construction, such as plaza decks, roof terraces, promenade decks, pedestrian concourses, tunnels, bathroom floors, showers, kitchens, mechanical rooms, parking garage decks, planter boxes, reflective pools, and foundation walls. PROTECTION COURSE is compatible with most currently popular dampproofing and waterproofing materials.


  • Tough, durable and lightweight … panels are easily handled, quickly installed.
  • Full width fiberglass matting improves flexural strength.
  • Highly resistant to chemical action.
  • Performance is equally effective in above- or below-grade installations.
  • Unique dual facing offers compatibility with most currently popular waterproofing materials.
  • Economical and convenient to use.

4′ x 8′ (1.22 m x 2.44 m) Panels

ASTM D 6506, Class B

PC-2 PC-3
Puncture Strength 312 N (70 1bf) minimum 365 N (82 1bf) minimum
Thickness 2.4 – 3.9 mm (0.095″ – 0.155″) 5.6 – 7.1 mm (0.220″ – 0.280″)
Water Absorption 10.0% maximum 10.0% maximum
Asphalt, % by weight 40% minimum 40% minimum
Resistance to Decay
(Classes A & B)
Meets puncture requirements after completion of test Meets puncture requirements after completion of test

Product conforming to ASTM D 6506, Class A also available by special order.

NOTE: Prior to application, consult the waterproofing manufacturer to determine whether the polyethylene film facing on one side, or the asphalt-impregnated reinforced mat on the other side of PROTECTION COURSE, is approved as “compatible” to the specific waterproofing product being protected.

PROTECTION COURSE is installed to form a continuous protective layer over the membrane waterproofing. The sheets can be easily cut with a roofer’s knife for fitting at protrusions.

Surface Condition … The waterproofing membrane must be free of sharp projections, dirt, and dust. If water testing is desired, it should be made prior to placing PROTECTION COURSE. Note: PROTECTION COURSE should be applied at the end of each day’s waterproofing to both horizontal and vertical surfaces.

Horizontal Surfaces … PROTECTION COURSE should be installed over the waterproofing membrane as soon as permissible by the membrane applicator or manufacturer. PROTECTION COURSE sheets should be butted together and cut to fit all intersecting surfaces and protrusions. If desired, joints may be covered with DETAIL STRIP from W. R. MEADOWS or roofer’s glass reinforced tape embedded in hot asphalt as a secondary waterproofing system. (See PRECAUTIONS.)

Vertical Surfaces … For dampproofed and/or waterproofed vertical walls to receive backfill, PROTECTION COURSE should be butt jointed and, if necessary, temporarily held in place while backfilling.

Backfilling … Backfilling against vertical walls should be done immediately using care and caution to avoid damaging the waterproofing application. Backfill material should not be dropped against PROTECTION COURSE in such a manner that it could drag the sheet down as the backfill drops. For horizontal applications, the waterproofing and PROTECTION COURSE should be installed just prior to the installation of the wearing surface.

Where PROTECTION COURSE is adhered to a waterproofing membrane, use an approved adhesive. Where taped joints are desired with tape set in hot asphalt, consult membrane manufacturer. PROTECTION COURSE is shipped on pallets with the polyethylene anti-stick sheet on the top or exposed side. PROTECTION COURSE should be stored on pallets and placed on a level surface. CAUTION: Do not apply PROTECTION COURSE over liquid waterproofing membranes containing volatile solvents until all of the solvent has evaporated. Consult membrane manufacturer for specific application details prior to placing PROTECTION COURSE. Read and follow application information and precautions. Refer to Safety Data Sheet for complete health and safety information.

May help contribute to LEED credits:

  • MR Credit 2: Construction Waste Management
  • MR Credit 4: Recycled Content
  • MR Credit 5: Regional Materials

This material last updated September 2014.


W. R. MEADOWS, INC. designs, manufactures, and markets high-quality building materials for today's construction professionals. Products are sold through an authorized distribution network. The family-owned and operated company focuses on product quality, exceptional service, and trusted integrity since its founding in 1926.
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