Case Study
Customer: Collingwood Gardens
Project Completed: March 2015
Type of Roof: torch on membrane
Materials: n/a Location: 3506 W 4th Ave, Vancouver
Project Completed: March 2015
Type of Roof: torch on membrane
Materials: n/a Location: 3506 W 4th Ave, Vancouver
On this job we were called out to remedy a condensation and mould issue that stemmed from a roof leak and venting problems.
There was staining/growth on the underside of the plywood deck. Ponding on the roof increased the possibility of condensation occurring due to the temperature transference. That cold temperature was being transferred to the ceiling space where there was no air movement. Warm meeting cold turned into moisture vapour which covered all surfaces. The extended contact with moisture resulted in organic growth.
We cleared the drain blockage. There were some vents that needed to be changed. We found a soft spot on the roof, caused by condensation and dry rot. The roof membrane was still watertight, and could last another 15 years. We recommended a repair in which we would replace the plywood deck in the soft area and install new membrane, with a ceiling space vent. This would repair the structural damage and should prevent a recurrence.
There was staining/growth on the underside of the plywood deck. Ponding on the roof increased the possibility of condensation occurring due to the temperature transference. That cold temperature was being transferred to the ceiling space where there was no air movement. Warm meeting cold turned into moisture vapour which covered all surfaces. The extended contact with moisture resulted in organic growth.
We cleared the drain blockage. There were some vents that needed to be changed. We found a soft spot on the roof, caused by condensation and dry rot. The roof membrane was still watertight, and could last another 15 years. We recommended a repair in which we would replace the plywood deck in the soft area and install new membrane, with a ceiling space vent. This would repair the structural damage and should prevent a recurrence.
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