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Exposed flat roof - Single layer

Dr. Fixit Torchshield is a torch-applied waterproofing membrane system with UV-resistant mineral finish.

  • Easy to lay torch-on membrane
  • Reduces dead loads on roofs
  • System life expectancy is 5 years

Method Statement

• Clean the surface thoroughly to get rid of all contaminants. Remove all surface imperfections and repair with polymer modified mortar using Dr. Fixit Pidicrete URP.

• Prime the surface with Dr. Fixit Torchshield Primer. Allow it to dry for 8 to 10 hours.

• Screed the mother slab with M 20 grade concrete, to a slope of 1 in 100, with at least 50 mm thickness at the outlet.
• Wrap all the pipe fittings and drainage fittings with Dr. Fixit Bathseal Tape.
• Torch over using the APP based membrane - Dr. Fixit Torchshield AM 4160 - with a mineral or slate finish of 4 mm thickness. Ensure overlaps of 100 mm with factory controlled / demarcated overlaps in the membrane.
• The membrane must go over the angle fillet at the parapet walls.
• Conduct flashing on the parapet wall with a C-shaped aluminium strip nailed (with SS Screws) to the vertical substrate at the termination of the membrane. Apply a single component Dr. Fixit PU sealant or a ‘neutral-cure’ silicone sealant to fill the gap and seal it.
• Provide Dr. Fixit roofing accessories such as roof drains, flashing strips, etc. as per standard roofing practices.

Technical data Sheet

Dr. Fixit Torchshield


 Q. What is a Polymer Bitumen Based waterproofing membrane?

A. Waterproofing membranes manufactured from bitumen modified with the addition of elastomers (SBS) or plastomers (APP) called Polymer Bitumen Waterproofing Membranes. They generally have fiberglass or polyester as reinforcement

Q. How long is the lifetime of bitumen based waterproofing membranes?

A. The bitumen based waterproofing membranes continuously maintain their performance throughout the useful lifetime of the building if they are selected, detailed, and installed properly. However, low quality bitumen based waterproofing membranes have shorter lifetime

Q. Where can I use bitumen based waterproofing membranes?

A. The bitumen based waterproofing membranes are used almost everywhere in buildings where there is water contact. Particularly the walls, foundations and ground floors contacting soil as well as foundation walls, balconies, terraces and pitched roofs where the water may accumulate or flood outside the building, and wet spaces such as bathroom, washing basin, WC are general fields of application of bitumen based waterproofing membranes.

Q. Are bitumen based waterproofing membranes resistant to sunlight?

A. The granule or aluminum foil surfaced bitumen based waterproofing membranes are resistant to UV rays. All other bitumen based waterproofing membranes are not affected by UV rays as long as they are topped with a protective layer (screed, concrete, concrete tiles, gravel etc.).

Q. Are the bitumen based waterproofing membranes applied only on concrete surfaces?

A. Generally, they are applied on concrete and wooden surfaces. It can also provide a perfect bond on other surfaces.