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Step 4: Open Valley Method

For a Cambridge Xtreme roof IKO recommends the open valley method, using Armourvalley (for low slopes ≤15°)

  1. Snap two chalk lines from the ridge to the eaves 8 cm apart increasing in width by 1cm per meter towards the eaves;
  2. Trim the shingles to these lines and cut a 5 cm triangle off the top corner to direct the water into the valley;
  3. Glue the valley end of each shingle with IKO Shingle Stick;
  4. Nail the shingles 5 cm back from the chalk line.

 

Go to "Step 5: Nailing & sealing" or download our application guide.