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.
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.
Man hours to complete = 10. Material needed: 4 gallons of portable sealer. 1 box of IKO MS Detail.
Article: 2-Ply SBS Modified Torch-On Roof Replacement High Level, Alberta. Low Slope Commercial.Torch-On Roof Replacement. 2-Ply SBS Modified Low Slope Commercial Roof. SBS modified torch-on roofing is one of the more widely used flat roof membranes in Alberta. I don't know the industry wide percentages, but I would venture to guess that we install about 30% of our roofs with torch-on. EPDM would be about 45% and the other 25% would be a mix of the other types listed below. When replacing a flat roof your primary options are traditional tar and gravel, 2 ply torch-on, single ply membrane (TPO, PVC, or EPDM), spray foam (SPF) or some form of fluid applied. Visit our local Edmonton roofing division website for a more detailed description of the various flat roofing membrane options. For torch-on, common application methods are conventional roof systems and inverted roof systems. In the manufacturing process modifiers are added to standard roofing asphalt to replace plasticizers removed during a distillation process. Bitumen is then reinforced with fiberglass or polyester fiber matting in order to increase durability and strength. SBS (styrene-butadiene-styrene) increases the flexibility of the membrane and allows it to have stronger expansion and contraction capabilities - the synthetic rubber additives increase flexibility of the membrane. Modified bitumen roof systems can be installed with torch, fluid applied asphalt, or cold adhesive. A typical SBS modified bitumen roof system (as in site report below) is a two-ply application applied with a torch using rolls of membrane that overlap the edge of the previous roll. In the example below the roof board (or fibre board) is what we refer to as an FR Board and it has the base sheet SBS applied to the fibre board before leaving the factory. In this instance the base sheet FR board is mechanically fastened to the roof deck with the cap sheet being torched on after. The benefits of 2-ply SBS modified roofing are:
- Torch-on SBS modified roofing is very durable. This is important for high traffic roof assemblies. This would include commercial or industrial roofs where there are perhaps a lot of rooftop units, satellites, communication towers and the like and various service technicians attending to the roof regularly.
- It is weather resistant and can handle impact that perhaps other membranes would have issue with.
- It is moderately easy to repair and maintain.
- The factory manufactured rolls make quality control easier than with tar and gravel BUR roofing.
- It is moderately flexible. This is important for climates such as Canada.
Good morning, Please find attached the quotation options for various membranes for the roof over your garage per the inspection report from our Red Seal Journeyman (see report below my signature at bottom of this email and quotation as attached). Unfortunately because of the small size the per sq rate is significantly higher than if you were to do both your house and garage - so if your house may be a consideration let me know and I'll revise the pricing for you. I've included options for replacement of all membrane types. Once you have had opportunity to review give me a call or email and I'll assist you with any questions you may have. Thanks again for your consideration!
- 20 x 100 ft. 60 mil EPDM.
- 10 x 100 ft. 6 mil Poly.
- 90 sheets of 2 inch iso.
- 45 sheets of 1/2 inch secure rock.
- 4x 5 gallon pails of bonding adhesive.
- 1x 3 gallon pail of splice adhesive.
- 1x 3 gallon pail of quick prime.
1x 5 gallon pail of splice wash.
- 10 tubes of lap sealant.
- 2x tubes of caulking.
- 2x 6 inch rolls of seam tape.
- 1 roll of form flash.
- 1 box of rags.
- 1 scrub pad kit.
- 8 roller sleeves.
- 8x 4 inch paint brushes.
- 1 roll of garbage bags.
- 600x 3 inch hd fasteners.
- 600x 3 inch plates.
- 40 sheets of plywood.
- 100x 3/4 inch deck screws.
- 100 ft. of drip edge.
- 12 ft. of flashing for the chimney and smack pins.
- 48 ft. of 5 inch brown gutters with hardware and matching gutter guards.
- 100 ft. of down spout.
- 10x 90 degree down spout and hangers.
- 100x self taping brown sheet metal screws.
- 2 rolls of 250 grey cap.
- 1 roll of flam flam.
- 1 can of spray primer.
Daily Report for Dec 4, 2014: The crew arrived at 7:30am to lay down the iso board as well as the rubber bug. At 5:00pm it started to snow so the crew left the site for the day.
< End Report > CODE: 1461 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.
- (1) 6x6 scupper.
- (10) 100' dark brown downspout.
- 1 box of screws self tap.
- 1 pail - sopramastic gum/tar.
- 1 roll - reinforced mesh (jewt).
- (2) 5 gallon pails of pea gravel.