Roof Deck Drainage and Waterproofing

ARTICLE:  Roof Deck Drainage Problems. Waterproofing a 2 Ply SBS Modified Bitumen Roof Balcony in Edmonton, Alberta.

Recommendations for Waterproofing Outdoor Decks Over Conditioned Living Space. Roof Deck Drainage and Waterproofing - Inspection and Repair of a Torch-On Flat Roof on Outdoor Balcony at Multi-Family Condominium. Customers regularly call on us to have roof assessments (inspections) completed. During a roof assessment our journeyman roofers assess the roofs condition. We assess the roof for preventative maintenance reasons as well as inspecting existing problems that the customer is pointing out. We then discuss different scopes of work fix the problems as well as potential materials and costs related to the repairs. One of the most common calls we get for inspections and repairs are rooftop decks, balconies and patios. The primary reason the failure rate on rooftop decks is so high is because of the original installation. It is common for incorrect membrane choice to be the reason. In other words, many people install an outdoor deck membrane that is intended only for an outdoor deck and not a membrane for over a heated living space. If your rooftop deck or balcony is over a heated living area you require a special membrane that is also intended for low slope roofing (as well as deck waterproofing) and is approved for use over a conditioned living space. Common products for this are Dura-Deck or DecTec, both of which are a PVC membrane that are suitable to be walked on (so they do not require a floating deck over top) and they manufacture membranes suitable for over a conditioned living space. We use DecTec extensively and have had great results with it. Or, also common is the installation of a membrane that won't hold up to the foot traffic associated with outdoor living areas. Other reasons include simple age, wear and tear, drainage and issues relating to penetrations or floating deck assemblies on top of the membrane. Visit our main website for more information on rooftop deck waterproofing. This particular inspection and subsequent repairs was more focused toward an aging membrane and the associated repairs that come with not properly maintaining the deck membrane and building envelope over the years. The drainage problems were causing significant damage to the exterior of the building. Below you will find the inspection report. May 20, 2015: Journeyman Superintendent Attends for Balcony Inspection. Roof Inspection Location: 10245 116 Street NW Edmonton Alberta. Roof Inspection Date: May 20, 2015. Roof Type: SBS 2 Ply Modified Bitumen Torch-On Membrane on Roof Balcony. Site Location Type: Multi-Family Condominium.

This customer is experiencing a problem with water getting in the roof system and it draining out on a low corner and destroying some exterior brick work. In the area of the leak there are 2 laps of the SBS modified bitumen that have come apart.

Roof Deck Drainage damaging exterior of building. Edmonton, Alberta.
Roof Deck Drainage damaging exterior of building.
SBS Torch ON Seam Pealing back
SBS Torch-On lap pealing back.
SBS Torch on roof, seconf lap starting to come apart
SBS Torch on roof, second lap starting to come apart.
 

Scope: To repair this, degranulate the area and apply new torch-on stripping in and around the corner to seal in properly. Man hours: To complete 3 - 6. Material needed: 1 roll of SBS modified cap membrane.

The customer  would also like a quote for the following scope: to fill 13 pitch pockets on the roof and also seal the voids around pitch pockets with some detail sealer.

Area that needs sealing
Area that needs sealing at gutter to wall area.
Pitch Pockets that need filling
Pitch pockets at deck railing post termination area that need filling.
More seams on the sbs torch on roof that need to be sealed
More seams on the SBS torch-on roof that need to be sealed.

Man hours to complete = 10. Material needed: 4 gallons of portable sealer. 1 box of IKO MS Detail.

More Reading:
http://www.jlconline.com/decks/waterproofing-a-rooftop-deck.aspx
https://www.grscanadainc.com/Rooftop_Deck_Waterproofing.html
https://www.grscanadainc.com/DecTec_Deck_Waterproofing.html
http://www.dec-tec.com/
https://www.pinterest.com/generalroofing/dectec-deck-and-rooftop-waterproofing/
File to be updated when repair reports come in to office.
< End of report >
CONTACT US
Call our 24 Hour Emergency Roof Repair at 1.780.424.7663 Mail to: 3428 99 Street NW Edmonton, Alberta T6E-5X5.
For all other areas of Canada call 1.877.497.3528 Toll Free.
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.
 

Tar and Gravel Roof Repair, May 29 2015

Article: Tar and Gravel Roof Repair Edmonton, Alberta. Flat Roof - Commercial. Emergency Dispatch. Repair to Splits, Blisters, Pitch Pockets.

March 29, 2015: Emergency Roof Repair Dispatch Call-In. Tar and Gravel Roof Repair Edmonton. This call was patched to our project manager as an emergency call-out. Our client, a management company that handles maintenance for commercial properties asked that we attend asap. One of our advantages in the roofing industry is our ability to respond 24 hours a day 7 days a week to any type of roof repair emergency. This particular emergency call-out was for a tar and gravel roof. Tar and gravel built up roofs have one advantage in that usually we can repair them almost indefinitely. As long as the maintenance inspections are done regularly and repairs done each year then chances are you will avoid having the roof become saturated with moisture. If too much of the roof assembly becomes saturated with moisture then it becomes impossible to repair tar and gravel roofs. Visit this link for a flat roof maintenance check-list and be sure you inspect your roof at least once a year or even twice a year with an expert. Below you will find the rooftop inspection and on-site roof repair work summary and photos. March 29, 2015: Roof Inspection and Report Completed. 
Site Address: 13040 137 Ave Edmonton Alberta T5L 5E3.
Property Type: Commercial Property.
This location is experiencing two primary roof leaks. One leak is on the east side of the building. The other roof leak is on the west side of the building.
When we attended to the roof we found a number of splits in the tar and gravel roof membrane. We also located a number of blisters. There are also two pitch pockets that need to be topped up as a matter of regular maintenance.
Scope of Work:
Scope of work to repair the roof would include gum patches to the splits. Also to cut open the blisters and patch them. And finally topping up the pitch pockets.
Man hours to complete = 16 total.
Material needed:
3 pails of gum.
1 spool of mesh 6 inch.
Miscellaneous other repair materials.
Tar And Gravel Gum Box
Tar And Gravel Gum Box (pitch pocket).
Tar And Gravel Roof Split
Tar And Gravel Roof Split.
Tar And Gravel Split Needing Repair
Tar And Gravel Split Needing Repair.
Tar And Gravel Repair Needed
Tar And Gravel Repair Needed - split in the membrane typically due to aged membrane and drying from UV exposure.
Tar And Gravel Split
Tar And Gravel Split in roof.
Tar And Gravel Repair
Tar And Gravel Repair.
 
April 4, 2015: Flat Roof Crew Attends To Repair Leaks. 
Even though only two leaks were reported inside the building there were a number of repairs required at roof level.
Today we fixed 12 problem areas on the roof that were a significant concern. We also filled up 2 pitch pockets. All repairs were gum patches on the tar and gravel roof.
Tar And Gravel Repair Leak
Tar And Gravel Repair being done with mesh and mastic.
Tar And Gravel Repair Being Done
Tar And Gravel Repair in process. Areas was spudded, cut open, dried out, mesh and mastic applied and roof pea gravel returned to roof.
Tar And Gravel Repair 1
Tar And Gravel Repair.
Tar And Gravel Repair Completed
Tar And Gravel Repair Completed.
Tar And Gravel Repair With Mastic
Tar And Gravel Repair With Mastic and Mesh Completed.
Tar And Gravel Repair
Tar And Gravel Repair in process.
Tar And Gravel Gum Box
Tar And Gravel Gum Box
  Article Topics: Tar and Gravel Roof Repair Edmonton, Roof Maintenance.   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.

Edmonton Commercial Roof Repair Quotation, September 2014

This client reached out to GRS to receive a quotation for repairs to their commercial residential building. They included a report (from which the subsequent photos and their captions are obtained), which allowed us to return a quotation for the repairs they sought. Client's Report Received: September 17, 2014 The client sent their report into the GRS office, detailing problems with the current roof and explaining what kind of services they would like performed in the various problem spots. This allowed our account representative to deliver and present an accurate quote for the repairs, in addition to positioning the possibility of a roof replacement as had been discussed with the client in prior communications. GRS Note: The photos and comments below were included in an Inspection Report carried out by a third-party and, while informative, may not fully represent the opinions of GRS. Sometimes clients will submit their own photos or reports that they've independently sourced; all of this information helps us build a proper quote without needing to physically arrive on site. Roof Slope: Flat Membrane Type: Built-Up-Roof (BUR)
Overview of the existing roof. Roof membrane is in fair to poor condition.
Overview of the existing roof. Roof membrane is in fair to poor condition.
Overview of the existing roof. Roof membrane is in fair to poor condition.
Overview of the existing roof. Roof membrane is in fair to poor condition.
View of exposed membrane experiencing increased deterioration. Area should be scraped clean, reinforced, and new protective surfacing applied. This deficiency was observed at multiple locations.
View of exposed membrane experiencing increased deterioration. Area should be scraped clean, reinforced, and new protective surfacing applied. This deficiency was observed at multiple locations.
At two corner (both Northeast facing corners) locations the protective surfacing has deteriorated, exposing the roof membrane. These locations should be swept clean and new protective surfacing applied.
At two corner (both Northeast facing corners) locations the protective surfacing has deteriorated, exposing the roof membrane. These locations should be swept clean and new protective surfacing applied.
Multiple membrane blister locations noted throughout the roof. All blisters should be cut out and new membrane complete with protective surfacing installed.
Multiple membrane blister locations noted throughout the roof. All blisters should be cut out and new membrane complete with protective surfacing installed.
Protective surfacing has failed at various curb locations leaving the roof membrane exposed. Locations should be swept clean and new protective surfacing applied.
Protective surfacing has failed at various curb locations leaving the roof membrane exposed. Locations should be swept clean and new protective surfacing applied.
Drain location should be swept clean to allow for the application of new protective surfacing. In addition, a debris screen should be installed to prevent drain blockages from occurring.
Drain location should be swept clean to allow for the application of new protective surfacing. In addition, a debris screen should be installed to prevent drain blockages from occurring.
Membrane protection should be installed beneath all rooftop equipment to prevent membrane damages from occurring.
Membrane protection should be installed beneath all rooftop equipment to prevent membrane damages from occurring.
At multiple curb locations, screws have been installed through the metal flashings and into the membrane creating a hole. It is possible that moisture entry will occur at these locations. Repairs should be carried out on the underlying membrane.
At multiple curb locations, screws have been installed through the metal flashings and into the membrane creating a hole. It is possible that moisture entry will occur at these locations. Repairs should be carried out on the underlying membrane.
Image 10
At multiple locations along the parapet walls, screws have been installed through the metal flashings and into the membrane creating a hole. It is possible that moisture entry will occur at these locations. Repairs should be carried out on the underlying membrane.
Newly installed metal flashings have been poorly secured into place. Fasteners have broken through the metal flashings at isolated locations. New metal flashings have been installed directly over the original metal flashings.
Newly installed metal flashings have been poorly secured into place. Fasteners have broken through the metal flashings at isolated locations.
New metal flashings have been installed directly over the original metal flashings.
View of wind damage to metal flashings. Additional securement of the metal flashings is recommended.
View of wind damage to metal flashings. Additional securement of the metal flashings is recommended.
The newly installed metal flashings have blown off at this location exposing the original metal flashings.
The newly installed metal flashings have blown off at this location exposing the original metal flashings.
Image 14
Debris buildup around the drain screen should be removed to allow for optimal drainage.
Image 15
Sealant installed onto storm collar has deteriorated and is no longer functioning as intended. Existing sealant should be removed and new sealant applied.
Conclusion:
This report is based on visual observations of the roof system. No destructive testing was conducted to analyze the underlying components of the roof system. With proper maintenance the remaining service life of the roof system is approximately Three (3) to Six (6) years. Maintenance should include installing protective surfacing, repairing membrane deficiencies, repairing membrane blisters, securing metal flashings, installing drain screen, installing membrane protection, removing debris from the drain screen and applying sealant to the storm collar. < End of Third-Party Inspection Report >
Quotation Delivered: After reviewing the thorough report submitted by the client, our account representative calculated a quote for repairs, as well as roof recovery and replacement options. They were returned to the client for their consideration, and we awaited their response. < End Report > CODE: 10040 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.

Edmonton Residential Sloped Roof Replacement, August 2014

This client required a full replacement of their sloped roof. A quotation with various types of shingling options was requested before work commenced on the project.  After some emailing with the client, they indicated that they were interested in either the Owens Corning Duration, IKO Grandeur, or Malarkey Legacy shingles. The client also had some concerns about roofing during the rainy season in June however the concerns were put to rest by our team:
The roofers close in what ever they rip on any given day so yes we can continue easily when the rain stops but we do not continue while its raining. Thank you.

The client was also provided with our Pitched Roof Shingle Installation Specifications:
  • Inspection of attic space – check intake air at soffits to be insulation is not covering intake, check exhaust venting at ridge to be sure it is clear and calculate proper exhaust required for attic size, check insulation to be sure there is no moisture damage, inspect underside of sheathing for damage.
  • All old nails removed from roof deck before new shingles installed (vs hammering down old).
  • Eaves-flashing along all eaves-troughs (coloured as required).
  • Rake-flashing along all rakes / gables (as required specific to design).
  • Commercial Grade 44" Ice and water membrane along all eaves, in all valleys, and at valleys at valley flashing edges after sheet metal installed.
  • Replacement of all vents and bathroom exhausts (coloured as required and ice and water to back and sides of flange). Optional ridge venting.
  • Supply and install of 3 ft metal back-pan for chimney (coloured as required and ice and water to back and sides of flange).
  • Supply and install of ice and water to flange of all vents, bathroom exhausts, chimney pack-pans, and any penetration.
  • Pre-painted valley flashing (commercial gauge with ice and water installed first, then metal, then ice and water running vertically on both sides).
  • Full premium synthetic felt underlayment over entire roof (tar paper becomes brittle over time and cracks).
  • Replacement of all goose-neck vents (pre-painted and colored as required with ice and water to back and sides of flange).
  • Replacement of all vents and exhausts with rubber sealed screws and not shingle nails.
  • Disposal of all materials, and full clean-up with magnetic roller to pick up any hidden nails.
  • Re-caulking of all storm collars and rain caps with high grade polybitumen or high grade polymer caulking (no tar caulking that will crack).
  • Storm nail all shingles (6 nails per shingle vs. 4).
  • Clean all gutters and downspouts.
  • Neighbour's discount of 5% for any neighbour that has work done immediately after yours.
  • Lifetime Workmanship Guarantee, 5,000,000.00 Liability, BBB, WCB, All Roofs Inspected, We Hire Inter-Provincial Red Seal Journeymen, Safety First Program.

The client decided to go with the Malarkey Legacy shingles. The initial colour was to be Midnight Black but the client change their mind and decided on Weathered Wood instead. This was no problem for our team who were able to locate the new shingles. Materials Required:
  • Field Shingles - 30 Sq. of Malarkey Legacy Weather Wood.
  • Cap Shingles - 80 lineal ft. of Malarkey product number 224 - EZ Ridge 10" to be set up over the ridge vent strips.
  • Starter Shingles - 240 lineal ft. of starter (whichever is recommended with Legacy).
  • Eave drip edge - 200 lineal ft. of color drip.
  • Ridge Vent - 80 lineal ft. of Lo-Omni Ridge vent is 9" wide for install under the Malarkey EZ Ridge 10" shingle.
  • Plumbing Boots - 3 neoprene or plastic.
  • Goose Necks - 2 colored goose-necks with-out baffle (screen only).
  • Valley Metal - 100 lineal ft. of coloured valley metal.
  • Underlay - 25 Sq. of synthetic breathable underlay choice.
Before and After Photo Journal:IMG_20140830_105926 IMG_20140830_105930 IMG_20140830_105944 IMG_20140830_105956 IMG_20140830_110005 IMG_20140830_125316 IMG_20140902_150733 IMG_20140904_143117 IMG_20140904_143121 IMG_20140904_143124 IMG_20140904_143154 IMG_20140904_143159 IMG_20140904_143203 IMG_20140904_143212 IMG_20140904_181216 IMG_20140904_181222 The following emails between our project manager (italicized) and the client were regarding the warranty for the Malarkey shingles:
Hi,
Attached is a copy of your warranty! Have a great day!
Hi. Thanks for your speedy response with the warranty, I got it.  I assume I don’t have to sign the warranty as GRS filled out and signed on our behalf.  Please confirm. Thanks for the pictures. Also, the bin has been removed today so it’s great, my wife can now get her car out. Good to know the vents were replaced, thanks.  A few questions about the warranty. a)  The warranty mentioned that shingles installed in the fall and winter may required hand-seal.  Does this apply to us considering completion in Sept. and we had snow today? b)  How do we know that all shingles have been fully sealed? c)  The warranty indicates that shingles that failed to seal during the first year after installation requires hand-seal by Malarkey.  Is GRS going to carry out inspection within the first year of installation to ensure complete sealing of all shingles, and if not, contacts Malarkey to get them hand sealed? Again, thanks in advance.
Hello, Good to hear about the bin.... he's been slow lately with the fall panic. As far as sealing, no problem there, they installed during suitable conditions. If they were installing today however, yes, they would have to tab every shingle. Tabbing is a last resort and not recommended when conditions are suitable as it actually interferes with the normal course of suitability (the sealant on the shingles is better than tabbing if able to activate). So in short, your application was done under proper conditions and is suitable under the warranty. Follow up. Yes, every roof is inspected during and shortly after install (yours has been already by myself and passed with flying colors) and is re-visited in the spring the following season. So we will be on your roof at some point in spring as part of your service. After which we inspect every 3 - 5 years ongoing as a service. Thanks for your patience with the bin!
Hi. Good to hear the application is suitable under warranty.  Also good to hear GRS provides on-going services like regular inspection, eases our worries greatly.  Forecast 20+ next week so think we don’t have to worry about self-sealing after-all. Again, thanks for helping out with our roof replacement project.  Great management effort.

< End Report > CODE: 806
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.

Edmonton Emergency Roof Repair Inspection, November 2012

This client's residential building required emergency repairs to their sloped shingle roof. They had our emergency crew come out to perform an inspection, for which we delivered a quotation afterwards.   Emergency Inspection: November 17, 2012 One of the GRS technicians went on location to inspect damages to the roof and prepare a report that might be used for quotation on the services. They took some photos and notes, confirming that a man-lift will be needed as the building is four storeys tall. The roof is fairly steep, as the photos indicate. photo (19) photo (18) photo (15) photo (16) photo (17)       Quotation Delivered: November 17, 2012 We sent over a quote for emergency repair services, including the required 'extras' such as the man-lift and any materials necessary. This article will be updated if the client elects to continue with the GRS service and book our technicians for repairs.     CODE: 17459 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.