Typical longitudinal ridge. This type is caused by movement of the insulation substrate. This could be caused by delamination of the insulation with the deck or vapour retarder or shrinkage of the insulation.
Typical longitudinal ridge. This type is caused by movement of the insulation substrate. This could be caused by delamination of the insulation with the deck or vapour retarder or shrinkage of the insulation.
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