City Beachfront Torch membrane roof repairs               hover your mouse curser over the photo for the text

This roof membrane was laid in 1999/2000 by another company from outside the area. In 2007 the owners reported several leaks around the inside of the walls on the upper floor coming from the roof.
Our investigations found that during the project, after the main roof was installed, a polystyrene moulding was added to the outside of the top edge of the walls. This was plastered to become a feature of the design, but the waterproofing on the top at roof level was poorly installed, no primer was used to get a bond to the plaster and after 7 years the torch membrane had lifted in places and was allowing water to pass underneath.
The previous edge had been a L shaped metal flashing over the wall edge and the polystyrene moulding was butted up to this. Water passing under the torch membrane strip hit the metal flashing under the membrane and then dripped down inside the vertical polystyrene EPS plaster cladding, to the inside of the upper floors.
To solve the leaking problem, we removed the membrane strip along the edge, repaired loose material and installed new membrane one metre wide around the entire roof edge and through the internal gutters. Because of the heat sensitive polystyrene moulding we had to finish the outside edge with a fibreglass/acrylic coating bandage, which was finished with loose Slate granules to match the Torched membrane.

a view of the membrane roof looking towards the rear same view towards the south side
badly designed skylight junction the satellite cable nailed right through the roof membrane!
a major wrinkle at a plywood joint a loose corner near the internal gutter
this is the torchon strip that was added near the end of the construction, its loose this piece of strip has blown off completely
the plaster was not even primed with bitumen primer to recieve the torched membrane strips another loose corner
a lot of loose granules, but the loss is even over the roof and not noticable this is the poystyrene moulding that was added after the main roof was completed
poorly laid out sheeting at the front of the roof while inspecting the roof we rewelded this piece which was flapping about
the steel head flashing on the skylights have rusted badly this gutter section at the north rear had a major leak
we cut the membrane in the gutter and it wasn't even stuck to the plywood substrate! section of gutter restuck down and prepared for a repair patch over
a second layer of 4mm membrane torched over the area to stop the leak another patch where a piece of membrane strip had blown off
a few weeks later we returned to undertake more comprehensive repairs access was awkward, using two ladders
we had the rolls of torchon delivered and lifted to the roof level by HIAB crane the first section of repair, the membrane strip removed from the edge at the polystyrene moulding
the section is preped by removing the granules from the mineral sheet and priming the outside edge the first piece of new mineral membrane is installed
applying the fibreglass/acrylic waterproof coating to the edge first section completed to waterproof stage
membrane strip removed from 2nd section 2nd section preped
this part of the gutter upstand was very buckled, it was cut out buckled section repaired with self adhesive 3mm Autotene membrane
similar buckling to the south front section being repaired south front gutter upstand repaired
the otlets were all relined with SA membrane deep into the downpipe south west gutter section preped ready for the mineral membrane
north west corner completed with colour matched bandage on edge membrane strip removed from front edge and granules removed from mineral membrane
front west side fully preped ready for new mineral membrane torching the new mineral membrane to the front west side, full harness and fall restraint system required close to the edge
new membrane completed to front edge fibreglass/acrylic bandage applied to front edge
colour matched top coat to front edge bandage and mineral granule finish to match torchon membrane sheets working towards the rear on the south side, more upstand buckle repairs
south rear corner buckles repaired, area ready for new mineral membrane south rear corner membrane installed
applying the fibreglass/acrylic coating bandage to the south rear corner closer view of the bandage being applied
another pic of the bandage going on back at the north rear corner where the intial temporary patch was put on by us
same corner completed with mineral membrane and fibreglass/acrylic bandage applied granules removed from the membrane at the rear section
the membrane strip removed from the edge new mineral membrane installed at the rear and fibreglass/acrylic bandage applied
colour matched top coat to bandage bandage dusted with matching granules
a view of the completed south rear corner view along the completed south side
small crickets were fitted behind these skylights to divert rain water around them tricky multi angled front corner completed
looking over the completed roof repair on the north side Wayne from Tararua Roofing installed new 1.5mm Aluminium head flashings to the skylights
more new aluminium head flashings a view of the roof from Palliser Rd on the hills behind