Should there be gaps and daylight under installed tiles?
People without tiling terminology cannot evaluate if visible gaps or daylight under tiles are acceptable. Seeing installers spread mortar and press tiles without back buttering leaves them unable to determine if the work is correct. This prevents them from ensuring optimum roof performance and knowing if spaces need to be opened up to let debris pass.
What the numbers show
Counted from the threads quoted below. How we count
- People have been saying this in most months since September 2026.
What people tried
Every workaround mentioned in the threads below. We haven’t tested any of them — and nobody here is claiming they worked.
Found another way around this?
Share your steps and trade-offs so fellow engineers don't have to reinvent the wheel. No account required.
Should there be gaps and daylight under installed tiles?
- 1Asking roofing professionals online for a visual assessment.Did this help you?
- 2Opening the tiles 1 to 1.5 inches from the center rib to allow water flow.Did this help you?
- 3Cutting tiles back 3 inches from the centerline.Did this help you?
In their words
Unedited, grouped by where they were said, most upvoted first within each place, each linked to the thread it came from.
Where this came up
People with this problem also raised
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