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How to Install a Resitrix Flat Roof System Video and Installation Guide

Step by step guide and installation video of the Self Adhesive Heat Weldable Resitrix membrane being installed on a flat roof.

Step by Step Installation Guide

Print these Instructions
  1. Deck Preparation

    The roof deck should be clean and dry. Refer to installation manual for preparation of different substrates such as felt and asphalt overlays and bonding to metal decks.

  2. Stir FG35 Primer

    Stir the FG35 Primer. FG35 primer should be kept in a warm room prior to installation if the weather is cold. This will help achieve a consistent even coverage.

  3. Apply FG35 Primer

    Apply the FG35 primer evenly using a medium pile roller. Always ensure primer is applied to the perimeter and upstands of the roof first before coating the main roof area. (50% coverage of the centre of the roof is acceptable using a checker board pattern)

  4. Allow FG35 Primer To Dry

    Allow the primer to fully dry before laying the membrane this could take between 30 minutes and 1 hour. Never prime an area bigger than the area to be covered in one day

  5. Roll out the Rubber Membrane

    Roll out the rubber membrane taking note of the non adhesive lap when laying out adjacent sheets

  6. Score Release Paper

    Position the membrane against any upstands and score the release paper as this will be removed at a later stage.

  7. Roll the membrane back half way

    Once the membrane has been positioned roll the membrane back to the centre of the roof so that the release paper can be removed.

  8. Score Release Paper

    Score the release paper with a sharp craft knife.

  9. Remove Release Paper

    Remove the release paper whilst rolling the membrane back in to position

  10. Broom the Membrane

    Use a broom to ensure that the membrane has full contact with the primed deck

  11. Bond to Upstands

    Bond membrane to upstands and walls by removing the release paper.

  12. Form Internal Corner

    Form internal corner. It is often best to remove the release paper in stages leaving the paper inside the pigs ear till last to be removed. There is more than one way to waterproof an internal corner please see the second option later in the guide.

  13. Repeat Process for Additional Rolls

    Repeat process for adjacent membrane sheets

  14. Cut Membrane Around Roof Details

    Cut the membrane to length and around roof details

  15. External Corner Detail

    Additional self adhesive sheets can be used to waterproof upstands. Ensure sufficient membrane is allowed for to give a 50mm overlap on the deck membrane and adjacent corner membrane.

  16. Heat Weld Membrane Overlaps

    Heat weld any membrane overlaps prior to installing corner patches.

  17. Heat Weld Corner Flap

    Heat weld the flap used to wrap around the external corner.

  18. Installing Corner Patch

    Cut a circular corner patch and cut out a finger width section from the circle, rounding off any corners.

  19. Break the Glass Fibre Reinforcement strands

    Stretch the corner patch to break the integral reinforcement strands. You will hear them break and this will allow the membrane patch to cover the corner.

  20. Heat Weld Corner Patch

    Heat weld the Resitrix corner patch.

  21. Cover External Corner

    Heat weld an additional piece of Self Adhesive membrane over the upstand and corner patch

  22. Internal Corner Option 2

    Where two separate sheets of membrane terminate at an internal corner it will be necessary to install a corner patch.

  23. Form the Internal Corner Patch Step 1

    Fold the circular patch in half

  24. Form the Internal Corner Patch Step 2

    Fold the patch again in to quarters and release one of the folds to form a pocket

  25. Heat Weld Internal Corner Patch

    Heat weld the internal corner patch

  26. Remove release paper from edge

    Remove the release paper from the section of membrane that will be used to form an upstand kerb over the roof edge batten.

  27. Use Seam Roller to Form Membrane on Corners

    Use a seam roller to mould the membrane to edge detail ensuring 100% bond on angle changes

  28. Heat Weld Membrane Laps

    Heat weld Resitrix membrane laps. Ensure a 2" 50mm gap is maintained between the heat gun nozzle and seam roller for a consistent weld. Excess pressure should not be required to create a bleed

  29. Good Heat Weld

    A good heat weld is indicated by a bleed out of the molten polymer bitumen from the bottom of the top sheet being welded

  30. Install Edge Trims

    Install flat roof edge trims using the installation guide relating to your chosen roof trims

  31. Completed Installation of a Resitrix Flat Roof

    Completed installation of a Self Adhesive EPDM flat roofing membrane

Here's what you'll need

Self Adhesive EPDM

10m roll