TPO on Renovation

Posted on by mike

Viking Enviroclad (manufactured by Carlile) 1.5mm Grey TPO (thermoplastic polyolefin) to multiple roofs on house renovation Wellington.

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Garage Roof

Roof with timber deck overlaid on part.
Two internal gutters with parapets and a L shaped kerb for deck framing.
plywood roof substrate over garage under construction area inside kerb will be a deck area area outside kerb is open roof area and internal gutter with parapets closeup of gutter and parapet south side view along north side internal gutter internal corner of roof area, framing for new porch starting to prime the kerb with hydroepoxy to seal it starting to prime the kerb with hydroepoxy to seal it plywood installation is complete and roof area is primed with hydroepoxy view across roof area to the north east, primed with hydroepoxy view along north gutter to the east, primed with hydroepoxy view back over the roof to the south east, primed with hydroepoxy view across the roof from inside the house next dry day the plywood is recessed out for the TPO scupper enviroclad TPO scupper is fitted into the recess first sheet of enviroclad TPO is glued into the internal gutter then folded back for the vertical gluing first sheet is in place, 2nd sheet in gutter is split due to higher parapet at this end near end of day in shade, too cold for adhesive to tack off reverse view of partly completed north west gutter, end of day one piece of horizontal membrane laid before temperatures dropped too low bottom piece run right through on south east side gutter bottom piece run right through on south east side gutter

Next day. Very strong winds.
parapet piece glued on, first horizontal sheet laid out and glued up ready to roll into place reverse view, very windy conditions, weights required to hold sheet down same scenerio on main open area of roof, winds of over 60kmph so windy the sheet had to be glued and rolled out in 2 stages main sheet and neighbouring half sheet finally glued down view from opposite corner towards the north west main horizontal sheets down and hot air welded view across roof past new corner framing for new porch last horizontal sheet almost laid
end of a horrifically windy day on the roof

Completion of Garage roof TPO

Third day
kerb cap pieces going on upper piece to parapet on south east side, long length, windy again parapet piece on east end of roof, 2 pieces to match slope of roof kerb caps and parapet pieces in place and partly welded to roof sheet or upstands everything in place, just some detailing to do fluted premade corner about to be welded to corner where kerb meets the porch upstand completed internal and external corners welded in corner from another angle door cill recess lined to comply with NZBC E2 corner from another angle kerb junction at other end into parapet wall view down on completed TPO roof from level above

Level 1 Rear Roofs and Ledges

north side of rear roof, plywood substrate ready reverse view of previous image large skylight on rear roof large skylight on rear roof moisture content of plywood at 27% is too high to lay TPO membrane north side of rear roof is primed with hydroepoxy to allow work to progress hydroepoxy cures on plywood with high moisture content hydroepoxy seals plywood allowing TPO membrane work to progress view down south side of rear roof, hydroepoxy primer applied internal corner on rear roof, door cill step first sheet of TPO cut to shape and glued up ready to fold into place again very windy conditions, timber weights to hold sheet down while glue tacks off second sheet mitred to match first sheet waiting for glue to tack off second fold and glue up second sheet third sheet, wind gust picked up and flipped before got weights on third sheet finally in position and glued up waiting for glue to tack off another big gust of wind flips corner before able to fold half sheet down sheets installed, about to hot air weld mitred lap joint mitred corner lap welded view across rear roof to the north west,low cloud threatening reverse view of previous image internal section of rear roofeast side, still windy, weights required waiting for glue to tack off first half glued down, wind throws other half over second half of sheet weighted down and glued up another mitred corner, to fit the slopes of this roof area behind skylight rear roof view across completed rear roofto the south east TPO to rear roof almost completed, edges yet to be folded and glued to aluminium drip edge rain sets in stopping work this really was a lousy Summer 2016/17 beads of wateron the new TPO membrane next fine day, one sheet through on west side of rear roof finally a calm day, no weights required to hold sheet down west side completed internal corner of rear roof, large upstand under door cill east side ledge. not windy, but weights needed to stop narrow sheet springing flat while gluing up narrow east side ledge laid, edges to be folded and trimmed internal corner area of rear roof completed

Level 1 Front Roofs and Ledges

front roof upper level, two sections north west end of upper level front roof narrow ledge on west side of upper level front roof moisture content of plywood is below 18%, hydroepoxy primer is not necessary substrate inspection checklist includes checking the screw fixing spacing narrow ledge, long piece, timber weight to prevent springing back down when folded cloudy but calm weather, no weights required TPO sheet is laid to narrow ledge reverse view of previous image towards the east front north west corner of upper level roof laid view of same section next sunny day, one piece sheet 2.2 metres wide upper level roof east side, view to west reverse view of previous image towards the east this roof can be laid in one piece 2.0 metres wide, slight breeze but sunny second half of sheet folded back and glued half glued a bit awkward on this roof, no where to stand if whole sheet and plywood glued up 2nd half of 2nd fold back is glued and tacking off close up view of edge with aluminium angle drip edge south east corner with turndowns folded and kickout diverter welded against wall view along west upper level roof with turndowns folded and glued to aluminium drip edge view along front eastern side of upper level roof with turndowns folded and glued to aluminium drip edge typical roof/wall junction with kickout diverter, note overlap of weatherboard below same detail with weatherboards scribed around another wall/roof/corner junction

Fastening bars

close up view of edge with aluminium angle drip edge on rear roof TPO folded and glued onto aluminium drip edge at back roof same view with anodized aluminium fastening bar installed back ledge with TPO folded over and fastening bar installed closer view of anodized aluminium fastening bar installed ledge on west side of back roof with TPO folded over and fastening bar installed exposed rafters at front, turndown and fastening bars installed reverse view in towards house view along longest section of turndown, TPO folded and glued to aluminium drip edge same view with fastening bar fitted TPO trimmed and fastening bar fitted at bottom of 45 degree sloped roof

Level 2 South and West Roofs and 45 degree Sloping roof with skylight

Under Shrink Wrap Scaffolding Structure
scaffolding extended up for temporary shrink wrap scaffolding shrink wrapped over 98% of house work can continue while it is like this outside now under cover the old tile roof has been removed and the detail work on the front roof can continue TPO upstand and lower part of valley from roof above closeup of junction of valley and front east roof looking down the bottom of the valley at the junction with the east roof above the east roof, substrate being installed to 45 degree roof to be clad in TPO view down 45 degree roof to lower level roof view over level 2 main flat roof inside shrinkwrapped structure view of back level 2 roof first sheet of TPO cut to shape and glued to 45 degree roof view down the valley of 45 degree roof second sheet of TPO in place 2nd sheet glued on, 3rd sheet in place 9.0 metre long by 3.0 metre wide main sheet of level 2 roof in place 5.1 x 3.0 one piece sheet for back roof in foreground, main sheet tacking off in background 9 metre long sheet tacking off main sheet folded down and rolled, 2nd sheet 1.8 widetacking off 3rd sheet of 3 glue tacking off main level 2 sheets trimmed, folded and welded to TPO sheets on 45 degree roof skylight on 45 degree roof you can see the 2 degree slope on the level 2 roof in this view back roof level 2, one piece folded back in half ready for adhesive sheet glued up and tacking off back roof completed, edges folded and glued to aluminium drip edge view across completed back roof to main level 2 roof edges folded, glued and trimmed on main level 2 roof

Near/At Completion

small plinths on back roof for timber deck a single plinth covered in TPO last item, vent pipe boot edges folded, glued and trimmed on main level 2 roof glass top to skylight, back roof
view along the north side at 2nd floor level timber deck on kerbs on front roof over garage timber deck on kerbs on front roof over garage exterior completed, scaffold down