ROOF MATE Step-By-Step Application Over
MODIFIED BITUMEN ROOFING
List of materials:
• ROOF MATE WHITE
• ROOF MATE BASECOAT
• ROOF MATE BUTTER GRADE
• ROOF MATE MESH
Optional materials:
• UCC (United Cleaning Concentrate)
• ROOF MATE FABRIC
• UNIBASE
• RHINO TOP
• ACRYSHEEN
Master Guide Specifications
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ROOF MATE Step-By-Step Over
MODIFIED BITUMEN ROOFING
STEP 1 – Preparation
Remove all loose granules, dirt and debris, taking
care to preserve the integrity of the existing asphalt
membrane.
Any unsound areas in the roof deck, insulation or
flashing must be repaired or replaced.
All blisters, delaminations, wrinkles and loose areas
must be cut away to sound substrate, or cut open
and nailed flat to the deck.
Ensure that the roof deck has positive slope to drain
and that the moisture content of the existing
substrate, insulation and deck does not exceed
15%.
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ROOF MATE Step-By-Step Over
MODIFIED BITUMEN ROOFING
STEP 2 – Cleaning & Priming
Roof surfaces must be clean, dry, structurally sound,
stable, well secured, and free of excessive ponding
water. Sweep roof thoroughly using a stiff broom.
Wash all surfaces using United Cleaning
Concentrate (UCC) or comparable biodegradable
cleaner to remove any remaining dirt and other
contamination.
Heavy deposits of dirt or contamination may require
additional agitation with a stiff-bristle broom or similar
mechanical scrubber.
If the roof has been coated with aluminized asphalt,
contact UNITED COATINGS for additional
preparation instructions.
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ROOF MATE Step-By-Step Over
MODIFIED BITUMEN ROOFING
STEP 3 – Repair
Reinforce repaired areas by encapsulating an
appropriate-size piece of ROOF MATE Mesh or
ROOF MATE Fabric into ROOF MATE Basecoat,
so that it totally covers the repaired area.
Repaired areas can also be reinforced by applying a
heavy coat of ROOF MATE Butter Grade, using a
brush or roller. Apply ROOF MATE Butter Grade in
two heavy coats, using a brush or roller, to achieve a
total thickness of 60 to 80 mils (1,524 to 2,032
microns), extending the Butter Grade a minimum of
1” (2.3 cm) on all sides of the detail.
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ROOF MATE Step-By-Step Over
MODIFIED BITUMEN ROOFING
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STEP 4 – Details
All cracks and splits shall be treated with a strip-coat
of ROOF MATE Butter Grade, centered over the
crack and extending 1” (2.5 cm) to either side. Voids
or holes larger than 1/8" (3 mm) in width shall be
filled and leveled with ROOF MATE Butter Grade.
Reinforce all split seams, roof termination points,
vertical/horizontal interfaces, drains, scuppers,
openings, protrusions, and around roof mounted
equipment, using either ROOF MATE Butter Grade,
or with ROOF MATE Mesh embedded into ROOF
MATE Basecoat or Butter Grade. If using ROOF
MATE Butter Grade, apply two heavy coats with a
brush or roller to achieve a total thickness of 60 to
80 mils (1,524 to 2,032 microns). If using ROOF
MATE Mesh, apply ROOF MATE Basecoat or
Butter Grade liberally around the area to be
reinforced. While the material is still wet, embed a
strip of ROOF MATE Mesh, centered over the
detail, applying additional material to totally
encapsulate the reinforcement fabric.
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ROOF MATE Step-By-Step Over
MODIFIED BITUMEN ROOFING
STEP 5 – Full Fabric Reinforcement
Reinforce roofs exhibiting a high degree of surface
degradation, split seams, etc., by embedding 40” (102 cm)
wide rolls of ROOF MATE Fabric into ROOF MATE
Basecoat or Unibase over the entire surface. Sandwich
the fabric between two coats of ROOF MATE Basecoat,
each applied at the rate of 1 to 1½ gallons per 100 sq. ft.
(.4 to .6 l/m²). If using Unibase, roll out a 4’ to 10’ (1.2 to
2.5 m) length of fabric and either spray apply or pour
Unibase evenly over the top side at the rate of
approximately 2 gallons per 100 sq. ft. (.8 l/m²).
Work the coating evenly throughout the fabric using a
broom or roller so that it is totally encapsulated, eliminating
any air pockets, wrinkles or gaps, and allowing the fabric to
conform to the surface contours. Overlap consecutive
passes of ROOF MATE Fabric a minimum of 2” (5 cm) on
each side, taking extra care to ensure that all edges are
thoroughly saturated, tight and secure.
Note: This system is designed for application to aged
modified roofs only. For new modified bitumen roofs,
contact UNITED COATINGS’ Technical Service
Department for specific recommendations.
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ROOF MATE Step-By-Step Over
MODIFIED BITUMEN ROOFING
STEP 6 – Coating Application
Apply 1 to 4 separate coats of ROOF MATE, using
airless spray or roller, at the total rate of 1.6 to 6.2
gallons per 100 sq. ft. (.65 to 2.5 l/m²), depending on
full fabric application, desired warranty and/or
specification requirements.
Create a self-terminating flashing by extending the
topcoat a minimum of 3” (7.5 cm) above all
protrusions, parapet walls, etc.
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ROOF MATE Step-By-Step Over
MODIFIED BITUMEN ROOFING
STEP 7 – Options
Apply walk pads, ceramic roofing granules
or Rhino Top as required to demarcate
walkways and service areas, and/or
provide non-skid characteristics.
To enhance dirt release characteristics in
problem areas, apply a coat of Acrysheen,
which imparts a slick, semi-gloss finish that
aids in maintaining a clean surface.
*Rhino Top is a tough acrylic coating that is available in both smooth and
textured formulations. It is ideally suited for horizontal surfaces that receive
regular foot traffic.
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Thank you for choosing quality ROOF MATE products from UNITED COATINGS
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