MEL-DEK | Bierschbach

Manufacturer W.R.Meadows


MEL-DEK is a roll-type waterproofing membrane composed of a nominally 53 mil thick layer of polymeric waterproofing membrane on a shrink-resistant, heavy-duty, 12 mil thick polypropylene woven carrier fabric. The two components are laminated together under strictly controlled production procedures.

MEL-DEK waterproofing system provides an excellent waterproofing membrane for bridges, parking decks or other vehicular traffic structures
to be overlaid with an asphalt concrete wearing course. MEL-DEK is ideal for repair, maintenance, or new construction applications.

Requires no protection u0085 can withstand the dynamic placement of hot asphalt overlays.
Provides 3/4? (19.1 mm) membrane-to-membrane weld at seams for positive, monolithic protection.
Flexible, dependable, cost-effective, easy to install.
Meets a wide range of maintenance and new construction application needs.

60? (18.29 m) long x 38.5? (.98 m) wide rolls

180 ft.2 net (16.72 m2) of effective waterproofing coverage. [192.5 ft.2 (17.9 m2) gross coverage.]

ASTM D 6153, Type III



Note: For applications receiving overlays other than asphalt, please consult W. R. MEADOWS Technical Service.

Surface Preparation u0085 New concrete surfaces are to be fully cured and dry or approved by the engineer. Surface is to be cleaned of all dust, dirt, and debris just prior to priming. Existing concrete surfaces are to have a smooth, sound, monolithic surface, free of voids, spalled areas, sharp protrusions, and loose aggregate. Remove all traces of old membranes, oil, grease, or other contaminants. For enhanced bond between asphalt overlay and MEL-DEK, apply an asphalt emulsion, water-based tack coat to the surface of MEL-DEK.

Temperature u0085 MEL-DEK may be applied in fair weather at air and concrete surface temperatures of 40u00b0 F (4u00b0 C) and higher.

Joints and Slab Drainage u0085 Apply a reinforcing strip of DETAIL STRIP from W. R. MEADOWS over all non-working joints or cracks over 3/16? (4.76 mm) wide before applying finished membrane. Seal all terminations with POINTING MASTIC from W. R. MEADOWS. Deck surface must provide proper pitch to gutters and drains. Drainage openings should be provided at the structural deck level to drain any water that penetrates the asphaltic concrete surface.

Conditioning u0085 Condition all surfaces to be covered with MEL-PRIMEu0099, MEL-PRIME N.E., or MEL-PRIME W/B adhesive from W. R. MEADOWS. Adhesive may be spray-applied or applied with a lambu0092s wool roller. Allow adhesive to dry until tack-free. Primed areas not covered in 24 hours must be re-primed. Coverage: 250 u0096 300 ft.2/gal. (6.14 u0096 7.36 m2/L).

Application Method u0085Apply MEL-DEK from low point to high point in both the longitudinal and transverse directions. In the transverse direction, overlap in shingle fashion 2 u00bdu0094 (63.5 mm) after removing the white polyethylene strip that exposes the 3/4? (19.1 mm) rubberized asphalt. This will provide the membrane-to-membrane weld at seams. Longitudinally, overlap 6? (150 mm) and seal with POINTING MASTIC. Once positioned, MEL-DEK should be immediately hand-rubbed onto the surface, followed by a pressure-applied roll pressing of the complete surface to assure positive adhesion. Seal all terminations with POINTING MASTIC.

Note u0085 Where a 125+ mil thick membrane is desired, overlap each roll of MEL-DEK 51%.

Inspect and Repair u0085 Inspect thoroughly before covering and make any necessary repairs immediately. Patch all tears, slit fish mouths and patch, then seal edges of all patches with POINTING MASTIC.

Paving u0085 Placement of the asphalt concrete overlay should be accomplished as soon as possible after application of MEL-DEK. A minimum 2? (50 mm) compacted overlay thickness is required. The temperature of the asphalt concrete at the time of compaction should be a minimum of 290u00ba F (143.3u00b0 C), not to exceed 340u00ba F (171.1u00b0 C). Paving equipment should be rubber tire variety. Protect the membrane surface from unnecessary traffic. Place the overlay from low point to high point with care and caution.

Refer to Safety Data Sheet for complete health and safety information.

May help contribute to LEED credits:
IEQ Credit 3.1: Construction Indoor Air Quality Management Plan: During Construction
IEQ Credit 7.1: Thermal Comfort u0096 Design
MR Credit 2: Construction Waste Management
MR Credit 5: Regional Materials