Mer-Ko™
Weather Deck
WATERPROOF
& FIRE RETARDANT PEDESTRIAN DECKING
DESCRIPTION:
Weather Deck is a multilayered latex mastic roofing system which
is trowel applied to a “floating” base sheet. This
system provides a slip resistant, waterproof walking surface that
is isolated from substrate cracks. Waterproof flashing for drains,
vertical surfaces, thresholds, as well as stress relief for thermal
expansion are incorporated into the system. The thickness is approximately
3/16"-1/4" (4.7 mm-6.35 mm) and presents few elevation
problems at doors, landings, steps, etc.
USE:
Flat roof decks, observation decks and balconies on commercial and
residential buildings carrying pedestrian traffic. (For vehicular
traffic, refer to Mer-Ko AutoDeck).
APPROVALS:
Weather Deck has been approved as a Class A fire-retardant roofing
system by:
• ICC-ES - Report No. 3389
• City of Los Angeles - RR 23811
• California State Fire Marshal
ADVANTAGES:
• Monolithic, contains no joints or seams.
• May be installed over any sound, solid, dry subsurface.
• Fire retardant-One Hour Fire Rated – See “One
Hour” Assembly Addendum.
• Will not soften under extreme solar temperatures.
• Installed only by qualified applicators.
LIMITATIONS:
• Not designed for vehiclar or heavy steel wheeled traffic.
• Subsurface must be dry before and during application.
• In cold climates, consult manufacturer for specific requirements.
• Not for use over OSB board.
CONSIDERATIONS
FOR INSTALLATION:
• Subsurface must be smooth. If not corrected, irregularities
will reflect on the Weather Deck surface.
For example, if a quarry tile deck has irregular grout joints which
are not smoothed with underlayment, the grid pattern will show on
the Weather Deck surface.
• Minimum standards for wood surfaces are 5/8" exterior
plywood over 16" o.c. joists or 1/2" exterior
grade plywood over sheathing.
• To insure perimeter flashng is installed per Mer-Ko specifications,
please contact the Mer-Krete Systems/ Mer-Ko Materials a division of Parexlahabra office.
• In freezing climates, sufficient pitch is required to insure
run-off. When covering a “sandwich
slab” or quarry tile deck, provision must be made to vent
the envelope created between the
existing vapor barrier and the Weather Deck.
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