Post on 08-Feb-2016
description
• Common problems you will find in Common problems you will find in roofing systemsroofing systems
Fracture of a PVC flashing detail at a parapet Fracture of a PVC flashing detail at a parapet wall caused by tenting and careless window wall caused by tenting and careless window cleaning workerscleaning workers
Spalling of concrete surface and Spalling of concrete surface and purging on an apartment building purging on an apartment building
balcony overhang.balcony overhang.
Blisters and ridges on conventional Blisters and ridges on conventional BURBUR
Rusted and corroded metal flashing at Rusted and corroded metal flashing at a roof flashing detaila roof flashing detail
Wind blow off modified BUR caused improper Wind blow off modified BUR caused improper roofing applications and lack of asphalt roofing applications and lack of asphalt
between fireboard overlay and original roof.between fireboard overlay and original roof.
Wind blow off of modified BUR caused by Wind blow off of modified BUR caused by improper roofing applications and lack of improper roofing applications and lack of
asphalt between fireboard overlay and original asphalt between fireboard overlay and original roof.roof.
Plant growth on roof and an Plant growth on roof and an unballasted PVC roofunballasted PVC roof. .
View of a roof with excessive snow loading.View of a roof with excessive snow loading.
Illustration of a poor wall flashing detail, Illustration of a poor wall flashing detail, note exposed cant. Buildings were built at note exposed cant. Buildings were built at
separate times and were never properly tied separate times and were never properly tied together.together.
Improperly flashed EPDM roof drain detail.Improperly flashed EPDM roof drain detail.
Lack of horizontal supportLack of horizontal support
Opening in flashing detail at Opening in flashing detail at scupper.scupper.
View of non-insulated pipe and View of non-insulated pipe and
condensation that has occurred.condensation that has occurred.
Wet area detected by infrared camera
outlined in yellow paint.
Failure of structural steel deck due to snow
and ice impact.
Corroded steel deck and its subsequent removal and replacement.
Flashing problem at detail of metal roof.
Illustration of severe water ponding due to poor drainage.
Oversized entry point for gas pipe.
Excess build up of debris on a roof.
Illustration of a hydraulic cement patch.
View of a roof with debris.
Improperly applied modified repair patch.
Split in PVC curb flashing detail at non
chamfered edge detail.
Tenting of PVC membrane at parapet wall
detail.
Condensation and fungus growth found on the underside of a residential roof application caused by inadequate
ventilation.
Typical blister, note width of blister. Blister is usually a sign of moisture entrapment in the interply felt later.
Typical longitudinal ridge. This type is caused by
movement of the insulation substrate. This could be caused by delaminating of the insulation with the deck
or vapour retarded or shrinkage of the insulation.
Asphalt bleed out from a BUR roof.
This is a sign of ageing.
Bare and exposed felts caused by wind scouring at corner of roof.
Substrate not properly Substrate not properly preparedprepared