Product Data Sheet Show all documents

SikaShield® Walkway

Modified bituminous walkway membrane

SikaShield® Walkway is an APP modified bituminous walkway membrane with a weight of 4,5 kg/m² and reinforced with a non-woven polyester fabric dimensionally stabilised with glass fibre. The top surface is coated with mineral granules, which allows the permanent exposure to UV radiation and protects against damage from maintenance activities, providing a safe access walkway. The underside of the product has a burn-off film for easy torch application.

  • Provides safe access routes over the roof
  • High impact resistance
  • Easy to install by torching method
  • Very good mechanical properties (tensile, tear, shear)
 
Product Data Sheet Show all documents

Usage

The Product is used as a walkway membrane for:
  • Flat roofs or sloped roofs with up to 15% gradient
   

Advantages

  • Provides safe access routes over the roof
  • High impact resistance
  • Easy to install by torching method
  • Very good mechanical properties (tensile, tear, shear)
 

Packaging

Roll width

39.4" (1.0 m)

Roll length

32.8 ft (10.0 m)

(ASTM D5147)

Colour

Red granules

Product Details

Product Information

Chemical Base

APP-modified bitumen

Reinforcing Material

Non-woven polyester fabric stabilized with fiberglass

Shelf Life

36 months from date of production

Storage Conditions

The Product must be stored in original unopened and undamaged packaging in dry conditions and temperatures between 41°F (5°C) and 95°F (35°C). Store in a vertical position. Do not stack pallets of the rolls on top of each other, or under pallets of any other materials during transport or storage. Always refer to packaging.

Top surface

Mineral Granules

Bottom Surface

Burn-off film

Weight

100 pounds per roll

Application

Application Information

Ambient Air Temperature

Minimum

41°F (5°C)

Maximum

86°F (30°C)

Relative Air Humidity

Maximum 80%

Substrate Temperature

Minimum

41°F (5°C)

Maximum

86°F (30°C)
Application steps

SUBSTRATE QUALITY

  • The supporting structure must be of sufficient structural strength to support all new and existing layers of the system build-up.
  • If used as a roof system, the complete system must be designed to withstand and be secured against wind uplift loadings.
  • The substrate surface must be uniform, firm and free of any sharp protrusion or burrs, clean, dry, free of grease, laitance, oil, dust and loosely adhering particles.

APPLICATION

To avoid coinciding joints, lay the membranes parallel to one another, align it properly, ensure the specified overlaps are followed, and then re-roll it before application.

                        

MEMBRANE OVERLAPS

           

  • Overlap the membranes by a minimum of 4" (100 mm) on the sides and 6" (150 mm) on each end. 
  • At the end overlap, cut off a corner measuring 4" (100 mm) per side at an angle of 45°.
  • End laps must be staggered 18'' (46 cm) apart.
  • Offset cap sheet side and end laps so they are positioned at least 12'' (28 cm) away from any base ply laps.
  • A mininum 20 lb (9 kg) roller must be used on all side and end laps, following immediately behind the heat welding. Apply uniform pressure across the lap area while the bituminous compound is warm to ensure a positive bond.
  • A continuous bead of asphalt approximately 1/4 inch wide should be visible at all laps after application.
  • The edge of the seam must be left untooled (not buttered).

 

IMPORTANT: DO NOT STACK LAPS!

 

TORCHING

 

  1. Heat the substrate and the backing film on the underside of the membrane with a gas burner.
  2. When the backing film starts to melt, the membrane is ready to stick.
  3. Roll the heated membrane forward and press it firmly against the substrate to bond it.
  4. Make sure a bead of melted bitumen is visible along the full length of the overlap sides and ends when laying.

   

     

 

     

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