Sherwood Park Commercial Roof Liquid Rubber Installation, September 2012

This commercial client required a liquid rubber installation to prevent further moisture from entering the building. An acrylic top coat was also to be applied over the liquid rubber installation. Inspection: Very difficult to pinpoint where the moisture is entering, however it appears to coming in at a number of areas. The metal roofing has a number of maintenance and sheet metal issues but the inherent expansion and contraction also likely causes issue. This roof leaks after the snow melts and heavy rainfalls. Roof is approximately 25 years old, could use a metal roof replacement but the Engineered Liquid Rubber coating will stop the roof from leaking for many years. Project Manager Notes:
This roof structure is a candidate for either a repair-maintenance program or an engineered coating and does not have to be replaced. I would not recommend an elastomeric coating or the SPF Spray Foam as the acrylic and EPDM covering options do not last well in Calgary climate, but liquid rubber performs well in our climate. Generally speaking, metal roof systems are constant aggravating roof structures. Industrial metal roof systems have a deficient design - they are water-shedding and not water-proofing coverings. Metal expands and contracts more than any other roofing material. Metal roofs tend to leak from expansion and contraction and ice / snow loads. Leaks are intermittent at seams, penetrations (stacks, etc.), fasteners (fastener holes get larger with expansion and contraction), around the perimeter as ice back-ups at gutters and then under eave, and at joints between roof and wall connections. Metal rust / corrosion may start at places, the seams and fasteners are vulnerable from expansion / contraction and snow loads, and any traditional caulking or coating won’t last more than a few seasons at best. Remedies are either spot repairs-maintenance with caulking or more extensive maintenance which involves engineered coatings. Our recommendation is a high end engineered liquid rubber polymer coating that carries a 10 Year Manufacturer Warranty and has option for maintenance contracts for extended warranty. General Roofing is considered a pioneer and leader in engineered roof coatings; (www.liquidrubber.ca, https://www.grscanadainc.com/Roof_Coatings.html, https://www.grscanadainc.com/Liquid_Rubber.html). We have significant liquid rubber operations specifically serving industrial facilities with low slope metal roofs. Our clients include companies such as Imperial Oil, Shell Oil, Telus, Fortis, Toran Power, National Oil Well Varco (NOV), Teck Resources, and many more. (https://www.grscanadainc.com/Project_Portfolio.html). In this instance, we recommend a 2 Ply System engineered liquid rubber coat to complete metal roofing, fastener replacement as required, sheet metal repair as required to-achieve a water-tight state. Typically this is even more successful than a full metal roof replacement. A recent project with photos can be found at; http://generalroofingsystemscanadainc.blogspot.ca/2012/05/roof-repair-liquid-rubber-metal-roof.html
1 2 Tomorrow we are ready to spray acrylic and will complete the scope (weather pending). The trailer is being left on site as it is a secure lot, temperature will be going down to zero tonight so all combustibles have been removed from trailer and a heater placed inside to maintain temperature of LR.
  • Pressure washed roof.
  • Poly'd enter building and tarped the trailer.
  • Applied 2 coats of Metal Safe LR to roof.
Strathcona County-20120915-00154 Strathcona County-20120915-00155 Strathcona County-20120915-00157Strathcona County-20120915-00159 Strathcona County-20120915-00161 Strathcona County-20120915-00162 We struggled to get a constant spray going but the gun would only spray for a maximum of one minute at a time. We did all the troubleshooting in the book to no avail. I am thinking the acrylic is to thick for a standard paint sprayer. In short we are going to have to find another solution to apply this acrylic. I will have to call him (another crew member) tomorrow and ask him specifically which type of gun and nozzle he uses.
Approximately 6 hrs for two guys work remains if we can get a sprayer that actually works without getting clogged.
  • Re-applied poly that had partially come down.
  • Cleaned out trough of all mud from pressure washing.
  • Rinsed all salt off of the surface of the LR.
  • Began spraying acrylic.
  • Applied one coat of acrylic to 25% of roof.
Strathcona County-20120916-00168 Strathcona County-20120916-00169 Strathcona County-20120916-00170 Strathcona County-20120916-00171 Strathcona County-20120916-00172
< End Report > CODE: 2260 Contact Us Call our 24 hour emergency roof repair at 1.780.424.7663. Mail to: 3428 99 Street NW Edmonton, Alberta T6E-5X5. We service all of Alberta including Edmonton, Stony Plain, Spruce Grove, Fort Saskatchewan, St Albert, Sherwood Park, Leduc, Nisku, Beaumont, Lac La Biche, Grande Prairie, High Level, Westlock, Slave Lake, Edson, Drayton Valley, Devon, Camrose, Wetaskiwin, Tofield, Lamont, Morinville, Vegreville, Tofield, Millet, Calmar, Evansburg, Redwater, Onaway, Viking, Athabasca, High Prairie, Valleyview, Fairview, Peace River, Whitecourt, Mayerthorpe and many more rural areas and towns.

Sherwood Park Residential Roof Leak Warranty Repair, May 2012

The GRS team installed an EPDM roof for this client the previous year. The client informed that there was water coming through a vent in the washroom and requested a warranty service repair. This is a follow-up report for a project completed the previous year. You can find the original article here. The following email was sent by our project manager to the crew member who would be attending the warranty repair call:
Good morning, We installed this EPDM overlay for the client last fall. It was a good install. My thinking is that it is condensation as he has an original home and it was having condensation issues last fall when we did the install also. If it is condensation, you may want to design a roof vent lay-out for him to get the roof venting. The important part is to be sure that there is at least one vent for each air space and you have some form of soffit intake. He is doing his siding also, and with his roof and soffit overhang design we may have to drill holes in the side of the vertical. HOWEVER, if there is no intake and we would have to start that process, he would require a Building Envelope consultant to draft a scope of work for us to follow. If it is only adding roof vents and not drilling holes in to his vertical outside wall then there is no need for a consultant. It could just be a leak too, but I doubt it. He may have shoveled a rip in the EPDM also, who knows. Also of note, with all his other remediation (mold, siding, etc) you never know what's been done. If it looks like we are going to be adding a number of vents, then we may not want to charge him for this service (assuming the leak isn't our fault) and just make it back up on the vent installs. If we are quoting vents etc, that quote would come from me based on our inspection. Thanks
Roof Report, March 20, 2012:
We arrived on site and met the owner, he said his wife noticed a leak in the bathroom ceiling fan late the week prior.  When we inspected the area suspected, we found 5” to 6” of ice around the protrusion (bathroom ceiling fan) and along the entire parapet wall. As to not do further damage to the EPDM membrane by removing the ice, we decided not to shovel away the ice and snow.  However we tried lifting the edges of the ice to remove what we could. This did not make enough difference to do a repair if needed. While doing this, we did notice that we could lift the cap off the bathroom fan vent. After doing this we noticed water pooled on the membrane over the insulation. We removed the wet insulation and packed it with dry insulation that the client had on hand, nailed and caulked the membrane in to place, and caulked the inside as well as the outside of the cap itself. We also caulked the neighbouring cap even though there was no suspected leak from it. The customer did mention during conversation that we are supposed to conduct a moisture test some time this summer.
March 20, 2012 001March 20, 2012 002March 20, 2012 003March 20, 2012 004March 20, 2012 005March 20, 2012 006March 20, 2012 007March 20, 2012 008March 20, 2012 009March 20, 2012 010March 20, 2012 011March 20, 2012 012March 20, 2012 013March 20, 2012 014March 20, 2012 015March 20, 2012 016March 20, 2012 017March 20, 2012 018March 20, 2012 019March 20, 2012 020March 20, 2012 021March 20, 2012 022March 20, 2012 023March 20, 2012 024 Final Inspection, March 16, 2014:
(this client needed a final repair done two years after the warranty service). This roof is in good shape. Seam tape and seam sealants are in place on all laps and detail. However the roof is missing parapet metal caps. Some of the membrane is temporary held down by clamps but can still allow water to enter the system. One of the seven scuppers has a patch that is fish mouthing which is enabling leaks. All other scuppers were sealed. The leak in question above the bathroom was a rip in the membrane beside the plumbing stack. Reason for the rip looks like an ice pick may have penetrated membrane. Membrane ripped below window metal flashing in corner joining into parapet.
 Roof Report, March 16, 2014:
  • Repaired 1 rip beside plumbing stack.
  • Repaired 1 patch fishmouthing beside scupper.
  • Repaired one rip on wall under a window joining to parapets.
  • All repairs were achieved using weathered membrane cleaner to remove dirt and dust etc.
  • Primer/ep95/ patch installed then sealed with EPDM seam sealant.
20140316_110929 20140316_110935 20140316_110942 20140316_111940 20140316_112249 20140316_112317 20140316_112327 20140316_112342 20140316_114321 20140316_120432
 < End Report > CODE: 51369 Contact Us Call our 24 hour emergency roof repair at 1.780.424.7663. Mail to: 3428 99 Street NW Edmonton, Alberta T6E-5X5. We service all of Alberta including Edmonton, Stony Plain, Spruce Grove, Fort Saskatchewan, St Albert, Sherwood Park, Leduc, Nisku, Beaumont, Lac La Biche, Grande Prairie, High Level, Westlock, Slave Lake, Edson, Drayton Valley, Devon, Camrose, Wetaskiwin, Tofield, Lamont, Morinville, Vegreville, Tofield, Millet, Calmar, Evansburg, Redwater, Onaway, Viking, Athabasca, High Prairie, Valleyview, Fairview, Peace River, Whitecourt, Mayerthorpe and many more rural areas and towns.