BUTYL MP

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BUTYL MP

FT Butyl MP MultiPurpose Waterproofing Membrane

Butyl MP is a  high temperature self adhered waterproofing membrane made with an advanced butyl rubber adhesive formulation and designed for use in steep slope roofing applications.  It offers premium protection from water infiltration from snow, ice dams, and wind driven rain.  Its a multi- purpose underlayment that can be used under most primary roofing materials including residential or commercial metal, adhesive foam set or mechanically attached concrete or clay tiles, primed cedar shakes, and asphalt or composite shingles.

 FT Butyl MP features Traction Grip an embossed walking surface that provides improved slip resistance in all weather conditions. Traction Grip is a polyester reinforced fabric that is engineered for extreme environment tear strength and designed for applications requiring heavy foot traffic and longer installation times like tile, slate, or metal roofing. It also accommodates for tile stacking on the rooftop for an extended period.

  • 100% Butyl adhesive provides the ultimate bond to plywood or OSB roof decks
  • Deck adhesion up to 3X Stronger than standard modified bitumen products
  • Extremely low installation temperature 25°F(-4°C) and rising                             
  • The advanced adhesive formulation allows for  long shelf life up to 18 months without significant adhesive strength reduction
  • Polyset® approved for adhesive foam set tile  applications   
  • Chemically compatible with low slope roofing materials such as EPDM and TPO 
  • Superior self-sealing around fasteners (Product meets and exceeds ASTM D1970) 
  • Watertight side laps without special treatment or requirement for primers  
  • Easy to remove double-sided silicone treated split-release liner 
  • UV Exposure rating up to 180 days 
  • Limited Lifetime Warranty 

SPECIFICATIONSButyl- MP
Roll Size ( Gross)2 square ( 200 sqft)
Roll lenght X width/ Roll hieght67 Ft X 36 inch
UV RESISTANCE ASTM G1546 month
WARRANTYLimited Lifetime Warrenty

Test and StandardBuytl – MP
Weight / sq. ft. per roll40 lbs (18 kg) / 200 sq.ft.
36 Rolls per pallet (48” x 48”) I 29 pallets per truckload1044 rolls per truck
Slip resistant walking surfaceEmbossed Traction Grip
Release linerDouble-sided silicone treated
split-release liner
Nail sealability – ASTM D1970Pass
Permeability – ASTM E96<0.035 Perms
Minimum thickness – ASTM D197041 mils (1.04 mm)
Tensile strength MD / CD – ASTM D1970128 lbs (58 kg) / 107 lbs (49 kg)
Elongation: D1970>70%
Lap seam – waterproof integrity – D1970 Pass
Tear resistance MD / CD – ASTM D197095 lbf I 77 lbf
Low-Temperature Flexibility ASTM D5147Pass
Adhesion to Plywood@75°F(23°C) I 40°F(4.4°C) – ASTM D197075 lbf/ft I 65 lbf/ft
Adhesion to Galv Metal@75°F(23°C) I 40°F(4.4°C) – ASTM D1970 85 lbf/ft I 80 lbf/ft
Thermal stability – ASTM D1970275° F (135° C)
Installation temperature25°F (-4°C) and rising
UV resistance 180 days
Limited warrantyLifetime

Installation Instructions

Rev Sept 18, 2020

USE: FT Butyl MP is a high temperature self adhered waterproofing membrane made with an advanced butyl rubber adhesive formulation and designed for use in steep slope roofing applications. Butyl MP features Traction Grip an embossed walking surface that provides improved slip resistance in all weather conditions. Traction Grip is a polyester reinforced fabric that is engineered for extreme environment tear strength, and designed for applications requiring heavy foot traffic and longer installation times like tile, slate or metal roofing. It also accommodates for tile stacking on the rooftop for an extended period. Butyl MP offers premium protection from water infiltration from snow, ice dams, and wind driven rain. Its a multipurpose underlayment that can be used under most primary roofing materials including residential or commercial metal, adhesive foam set or mechanically attached concrete or clay tiles, primed cedar shakes, and asphalt or composite shingles.

STORAGE:

For best results store Butyl MP upright in its original packaging in a well ventilated area at room temperature between 40°F (4.4°C) and 90°F (32°C). If product has been stored at a high temperature above 90°F (32°C) it may become difficult to remove the release liner backing.  To correct this, move product to a cooler location. Once cooled, the release liner can be easily removed.

DECK PREPARATION:

Butyl MP should be installed over a clean, smooth, and dry deck. The deck should also not have any voids, protrusions, damaged or unsupported areas. For re-roofing projects, replace any water damaged sheathing and sweep roof deck thoroughly removing dust, dirt and loose nails. Do not install over old roof covering.

APPLICATION:

For best results Butyl MP should be installed when the air, membrane, and substrate temperature is over 40°F (4.4°C).  However, Butyl MP can be installed in temperatures as low as 25°F (-4°C) and rising.  Priming is not required when attaching to wood or OSB decks.   Concrete or masonry decks should be primed with a solvent or water based primer that meets ASTM D41 for self-adhesive membranes.  Membrane to be applied in shingle lap fashion working from the low point to the high point of the roof. Apply the membrane in valleys before the membrane is applied to the eaves. Butyl MP is to be laid out horizontally (parallel) to the eave with the printed side up.  Horizontal overlaps to be 3” using the designated overlap line printed on the product facer.  For end laps it is recommended to overlap a minimum of 6” and nail 1” in from the edge along the vertical end lap with 6” spacing between nails. To increase adhesion a water based primer can be used along end lap. End laps should be offset a minimum of 6 feet on adjacent courses.  Where it is necessary to overlap Butyl MP over the ridge it is recommended to cap nail along the outer edge 1” in at 6” intervals. Note if underlayment will be left exposed for an extended period in high wind areas it is also recommended to nail along the outer edges of the roof along the rake or eave.

For easier installation, it is recommended to cut the membrane into manageable lengths. Then peel back one side of the split release liner and apply in position on the roof deck and then press in place by hand or with a weighted roller to increase adhesion to the deck.  Once one side has been pressed to the deck peel back the remaining half of the release liner and press down to adhere to the roof deck again using a weighted roller to increase adhesion.  For improved adhesion hand rolling over the selvage edge and directly above the selvage edge using a weighted roller is recommended. If a roller is not available or not considered safe, walk on all laps, and as much of the field area as possible.

For Cold Weather Applications 25°F (-4°C) or below, a primer should be used and the upper most  selvage edge blind nailed using 3/8” head roofing nails 1” or longer.  Space nails along edge at 12” intervals using the marked locations. For best results, warm Butyl MP to room temperature prior to application.

For Steep Slope Applications (5:12 or greater), high wind areas, or when installing at temperatures greater than 100°F (38°C), it is recommended to blind nail the selvage edge area as per above under cold weather application. Butyl MP should be applied under the metal drip edge along the rakes and over the metal drip edge along the eaves unless otherwise specified by local building codes.  Do not fold Butyl MP over the roof edge unless the edge is to be subsequently covered over by a drip edge or other flashing material.

In areas where ice damming can occur, install Butyl MP from the eaves up the roof to a point not less than 24 inches inside the exterior wall, measured horizontally.  Consult your local building code for specific requirements.

For valley applications, peel the release liner; center the sheet over the valley and hand press in place from the center of the valley outward.  Note: It is very important Butyl MP stay in contact with the roof deck into and out of the valley area. Butyl MP should never be suspended or bridge a valley. It is recommended to follow up with a weighted roller or by walking on the surface.  Give special attention to ALL perimeter edge areas and overlaps.

Repair holes, fish mouths, tears, and any other penetration damage to the membrane with a round patch of membrane extending passed the damaged area by 6 inches in all directions. Do not install fasteners through membrane over any unsupported areas of the structural deck, such as over joints between adjacent structural panels.

PRECAUTIONS:

Butyl MP is a moisture and vapor barrier and therefore must be installed above a properly ventilated space(s).  Follow ALL building codes applicable to your geographical region and structure type. Butyl MP is not designed for indefinite outdoor exposure. Final roofing should be installed within 180 days of underlayment installation.

CAUTION – Read Good Safety Practice Below

As with any roofing product, always follow safe roofing codes & practices (OSHA) and always use and wear fall protection devices when working on roofs. Release liners are slippery and should be removed from work area immediately after application. Use caution when walking or standing on Butyl MP as slip resistance may vary with surface conditions, weather, footwear and roof pitch. Failure to use proper safety gear and footwear can result in serious injury.

BUTYL MP logo program

Our BUTYL MP Dual Logo Program is a great marketing tool and receive majority branding alongside our own logo and contact information. You’ll be recognized in the community as a leader in sustainable roofing practices and gain valuable exposure for your business

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