Article: EPDM Flat Roof Replacement. Residential Low Slope Project.Below is a site report detailing the installation of an EPDM flat roof replacement in Edmonton, Alberta. The roof was originally a built-up tar and gravel low slope roof that connected to a shingle pitched roof system. Considerations with respect to flat roof systems. When considering flat roof replacement options, it is best to consult experts prior to choosing which membrane you will use, what will make up the roof system, and how the roof assembly will be put together. There are many considerations such as slope of roof, drainage scuppers and internal drains, insulation value, which membranes work best in your climate, what will the effect be on the building efficiency, and much more. All decisions are vital to immediate and long-term success. A flat roof is a considerable expense so you want to be very cautious to make the right decisions.
Visit our main website for a complete guide to selecting flat roofing replacement systems.May 9, 2013: Crew Arrives For Assessment. Flat Roof Inspection. This is a tar and gravel flat roof that connects to a steep pitch shingle roof. The roof is leaking and has been for some time in different areas. The roof is soft and spongy and there will be some replacement of sheathing and possibly the insulation. The roof is 960 square feet and needs to be re-sloped. The old roof would have to be removed to add enough room for re-sloping. May 10, 2013: Flat Roof Replacement Quotation is Provided. Our standard flat roof pricing, quotation formats and inspection reports are extensive to ensure you're equipped to ask the right questions when obtaining prices from other roofing contractors. Our quotes include all flat roof system membranes and methods of installations. Our inter-provincial journeymen red seal roofers are experts in each area of install. June 30, 2013: Crew Attends Site for Replacement of Flat Roof. July 2, 2013: Crew Finishes EPDM Roof Replacement. EPDM Roof Is Complete. < End 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 us Toll-Free +1.877.497.3528. 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.
Article: Temporary Flat Roof Repair. 2 Ply SBS Modified Bitumen Torch-On Roof.Below is a short roof report that shows temporary emergency roof repairs using mastic to a flat roof in Edmonton, Alberta on a 2-Ply Mod Bit Torch-On System. Normally when we attend to flat roof repairs, the goal is to either perform repairs that have a high probability of lasting for some time or replace the roof. In some instances, our customers do not have it in the budget to either do the repairs properly or replace the roof. Often they have a replacement budgeted for the future. In the instance below the customer wanted the least expensive option to simply stop the leaks until he/she could finance a roof replacement. A quote for much more extensive repairs was provided but declined. January 20, 2015: Crew Arrives On-Site To Complete Repairs. Originally the client had one leak on a goose neck vent. After further investigation it seams that another has started in a dryer vent. The crew fixed both the leaks with sopramastic and mesh. The customer looked at our work and was very happy with what was done. Man hours: 3 total. Materials:
- 1 gal can of mastic.
- 8 ft. of 6 inch mesh.
Article: 2 Ply SBS Torch-On Low Slope Roof "Gum Box" Repair on Commercial Roof in Edmonton Alberta."Plastic pan - also called pitch pan, pitch pocket, gum box, these comprise a flanged collar placed around items that project through the roof system; the flange is properly set into the roof membrane and the pan is well filled with plastic cement; these pans are a constant source of trouble and should only be used when no other solution can be found." Source: Red Seal Roofer Program Website. February 13, 2015: Journeyman Roofer Attends for Roof Inspection. Address 11754 170 Street Edmonton, Alberta. The client is experiencing a small leak 15 feet in front of the front doors around an electrical conduit penetration in the roof. The electrical conduit is two feet from the roof edge which is the highest point on the roof as the drains are in the center. I believe the leak could be leaking around the gum box which is starting to crack or where the stack is fastened to the roof. I believe the water is getting in through those holes and running back into the system. To fix this problem we would need to first put a gum patch on the gum box and tighten up the bolts on the bracket that holds the conduit and seal around it with some good caulking. Man hours 3 - 6 total with drive time and inspection time. Material 1 - 3 gal pail of gum. 2 tubes of tremco chalking. Roof measurements 130 ft x 160 ft with two drain and 13 penetrations. The roof is approximately 10 years old and in good shape.
Article: Residential Flat Roof Repair Edmonton, Alberta. EPDM Low Slope Roof Membrane.Repair of an EPDM low slope roof on a residential home in Edmonton, Alberta. The low slope (flat) roof transitions to a pitched shingle roof. Penetrations and challenges include chimney, skylights, vents, drainage, ice damming, and insulating value on low slope. Additionally the transition between the low and steep roof systems posed challenges. Also a section on choosing the correct low slope membrane and roof assembly. This customer had originally called us when Edmonton had set records for snow-fall in January of 2012. She had significant snow loads on her roof and the concern was that her roof may collapse. So we removed the snow from her roof and discovered significant ice damming challenges on the low slope portion. We returned in 2013 and 2014 to do regular roof snow removal because every-time the snow built up on the roof the heat from inside her home would get to the underside of the low slope roof sheathing and cause ice damming. The ice dams would then get in between the laps of the existing roof membrane and result in leaks. Mid 2014 she contacted us to quote on the replacement of the low slope roofing with hopes of solving the problem. We quoted the various options for low slope roofing membranes, which included; Spray Foam (SPF), Tar and Gravel, SBS Torch-On, EPDM, TPO, PVC and Liquid Rubber. Our standard quotations include pricing for the different options available for flat roof system membranes, a roof inspection report, a write-up on the pro's and con's of each type of system and our recommendations for your most suitable roof membrane choices.
Our customer chose to replace her failing tar and gravel built up roof with an EPDM single ply membrane roof recovery (or retro-fit). This means that we removed the gravel and skinned the bitumen membrane off and then mechanically fastened a roof board and then fully adhered the EPDM. We also did some drain work and scupper work. Our customer did not opt for a complete removal, re-sloping with an engineered slope insulation system, or any additional R value added which could also have been done with simple rigid type insulation boards. In early 2015 our customer had called with leaks to the low slope membrane - the ice dams were back. This is an important lesson in choosing the correct roof membrane, insulation, drainage, re-sloping and more. Had we been able to re-slope the roof and been able to add insulation value, the heat from the inside of the home would not escape and get to the underside of the roof membrane and cause ice damming. But, the customer requested the least expensive options and even though our reports (see link above for sample quotation and inspection report) explain in detail most considerations, this is the way it was requested to be done by the customer. So this spring we returned to find the same ice damming causing issues with a now new membrane. We also found drainage issues which were expected - the roof was ponding because a re-slope was not in our scope. And there were some technical (debatable) installation tweaks that may or may not have been required. Nonetheless, we now had a new roof leaking the year after it was installed. So of course we once again suggested the upgrade options to alleviate the issue but the customer would have nothing with that and requested we simply do the repairs and move on. Below is an account from the crew of the type of repairs they did to try and mitigate any issues in the future (full well knowing that the prime aggravating factors are insulation value and sloping). May 5, 2015: Crew Attends to Residential Flat Roof Repair. We arrived on site at 9:58. We started the day with the toolbox meeting and safety documents. We then went up on roof to determine an installation plan. The scope of work we decided on and did is as follows. Scope of Work # 1 The first step was to pull all EPDM down to flat roof from under the shingles at the bottom of the sloped roof. This reinstall was to ensure no water could be coming from the flat roof to steep pitch roof transition. We then had to remove all metal flashing from around the two skylights and chimney on the roof. Once we had all the EPDM pulled we started lifting shingles along the first few rows of the sloped roof and applied the EPDM bonding adhesive. This was done under the first couple layers of shingles and to the underside of the EPDM. We then installed the EPDM back under the shingles. Then next step was to apply a bead of water block on the edge of the EPDM under the shingles. Once that was complete we secured EPDM by screwing a piece of turn-bar down on the edge of the EPDM where the water block bead was applied. Scope of Work # 2 The crew arrived on site at 1 pm and started working on the cricket behind the chimney. He started by cutting a piece of EPDM 7'x3'. He then had to take the Epdm bonding adhesive and apply in the same manner as the work in scope # 1 by applying the adhesive under the shingles as well as the under side of the Epdm. Once the 7'x3' piece was installed he started working on the corners. Using quick prime and seam tape he seamed in the corners of the Epdm around the chimney.Below is a sample flat roof quotation. The first link is a PDF download and the second is a Word Doc file download.PDF. Sample Flat Roof Quotation Including Roof Inspection Report and Pricing for Flat Roof Options, Edmonton, AB
< End of report >
Click here to visit our local roof repair website and order a quotation for flat roof repair in Edmonton or area or contact us per below.
ARTICLE: EPDM Roof Replacement Edmonton, Alberta. Flat Roof, Residential, Single-Ply Membrane. Firestone.A roof site report documenting the installation of a small flat roof on a residential property. We replaced the roof with EPDM membrane in Edmonton, Alberta. The old roof was a roll on built up roof. About EPDM Roofing. Ethylene Propylene Diene Monomer (EPDM) roofing is now one of the more used roof systems in North America. EPDM roofing is a single-ply roof membrane like TPO and PVC. The single-ply membranes came along more than forty years ago after tar and gravel and SBS modified torch-on. The most popular single-ply roof membrane systems in Canada are EPDM (rubber roofing), TPO (thermal plastic) and PVC (poly-vinyl). Single-ply membranes are more affordable than tradition BUR and torch on roofing systems due primarily to labor savings. Single ply roof material is also less costly, but the main savings comes as a result of installation time being less. In warmer climates, white or reflective roofs produce a net benefit for building efficiency. In colder climates (like Alberta), a black membrane such as EPDM produces a net benefit because we have more cold days than warm days. EPDM can assist with snow melt being faster and this improves overall building performance and efficiency by lessening the roof dead weight load. A dark roof will also melt ice dams quicker resulting in less maintenance due to membrane damage caused by ice and snow. EPDM also has the benefit of thermal shock durability. The EPDM roofing association states that EPDM has expansion of 300 percent. When you add the UV stability EPDM possesses to its expansion qualities it makes sense to use it in any environment. Traditional BUR and torch on SBS do not have the same expansion quality or UV stability. Tar and gravel requires pea gravel and SBS requires granules to protect it from the sun’s rays. Even TPO and PVC do not have the expansion qualities of EPDM. A significant benefit of using EPDM is that science tells us in many recent studies that in a cold climate single ply reflective roofs are prone to condensation issues – EPDM is black and doesn’t pose that issue. EPDM can last more than 40 years because of its high resistance to ultraviolet (UV) radiation according to the EPDM Roofing Association (ERA). EPDM’s resistance to moisture absorption allows it to be installed on roof systems with less of a slope than other single-plies. EPDM is also used for waterproofing reservoirs, geo-membranes, ponds and has many other uses. Choosing the Right Membrane for You. When choosing a low slope roof membrane we suggest examining the various options available on the market. Many contractors only install one or two options and are therefore not your unbiased source. Obtaining quotes from contractors that represent all system choices will help you determine which system is right for your building considering budget, performance, warranty, climate, efficiency and many more considerations. We see it all the time (the wrong choice) because we are roof repair experts - we process thousands of incoming inquiries every year. We have seen people purchase EPDM when their roof was a high traffic area, which is not the correct membrane. We have seen large sophisticated operations in northern or central Alberta and Saskatchewan opt for a reflective membrane citing their green initiatives, which is not usually going to produce a net benefit and if you study it out will likely not hit the end goal target relating to green objectives. We have even had building operators in areas as far north as Dawson Creek or Rainbow Lake ask for a spray foam (spf) roof with a reflective covering such as polyurea on a metal roof system because their goal was to achieve waterproofing. Spray foam (spf) roofing of course will insulate but it doesn't assist in waterproofing and a reflective roof in a cold climate works against building efficiency. If you want waterproofing on a metal roof use liquid rubber in a cold climate. If you want R value then spray foam is a great option. But why pay for the insulation if you don't need it? There are many more examples. It is very important when choosing a low slope roof membrane to consult the sources and be sure it is the right system for your location and goals. Below is a report from Edmonton, Alberta that has a homeowner choosing EPDM because they wanted a better net benefit than white or cool roofing could offer. They chose a complete replacement vs. a roof recovery (retro-fit) because the existing roof assembly was not sound and there was existing moisture in the old built up roof. They did not require more R value so there was no added spray foam (SPF) or roof insulation boards to the roof. For more information on EPDM roofing visit this article from Construction Canada. http://www.constructioncanada.net/the-single-ply-skinny-on-epdm/ May 23, 2015 - Day one. Crew attends for EPDM roof replacement.
7:30 am we started our day by going to pick up all materials needed to complete this roof . 9:30 am arrive on site . We did our daily tool box meeting for safety and then went up on the roof and started to tear up the old roof. This was not easy as there were three different roof systems on top of each other. This took 4 hours to do. Once it was fully tore up I started to replace the rotten areas with new sheathing, which wasn't much. We also had to install sheathing on the back portion of the roof. To install the sheathing we used nails and nailed down the sheathing to the roof framing where it needed to be changed out.
May 24, 2015 - Day two on site.
8 am we arrived on site and had our daily tool box meeting. We then went on the roof and started sheathing in the entire roof. Once I got the guys installing plywood on other side of roof we went to install the EPDM on the back portion of the roof. Once that was complete we helped finish the sheathing along the parapet walls.
Once the roof was fully sheathed we then started to lay rubber on our open field. We managed to get most of it done, but we will have to return for 5 hours tomorrow to finish the roof.
May 25, 2015: DAY 3 completion.
We started the day with our daily tool box meeting. We went up on the roof and we started finishing the EPDM on field of the roof. We then started on the parapet walls.
When one side of the parapet wall was complete we then started on the other side of the parapet walls. When the parapet walls were done we then started to seal in the drain with form flash and install all the seam patches and corner patches also with form flash.
Once that was finished I helped the guys finish the other parapet wall. The crew then cleaned up the roof and the ground while I sealed in the other drain and corners with form flash. When the roof was complete I then put lap seal in the corners with patches and all three laps. The home owner did a quick inspection when we where finished and was extremely happy with the work.
The rest of the following photos are all finish product photos of the new EPDM Flat Roof.
Materials Used: EPDM. 3 cans of bonding adhesive. 1 can of quick prime. 1 can of lap adhesive. 2 rolls of 3 inch seam tape. 1 roll of form flash. 30 sheets of plywood. 1 box of nails 100. 1 box of 2 inch wood screws 500. 2 tubes of lap sealant. 10 pieces of drip edge.
Article: Flat Roof Repair Edmonton. Delete Rooftop Curb, Roof-In Curb, Roof-In Sleepers, Gum Boxes. Tar and Gravel. Stramit. Edmonton Alberta.March 13, 2015: Roof Inspection and Report Completed. Flat Roof Repair Edmonton. Site Location: 10625 51 Avenue NW Edmonton, Alberta.
We arrived on-site at 10:30 to take a look at the BUR roof that needs a 2 x 2 foot vent curb deleted, and another new curb installed a few feet NW of the old curb. Then he would like us to install 2 sleepers on the roof and tie back into the membrane with 2 gum boxes to be installed as well, one for a gas line and one for a electrical line to go through the roof. This a single story with easy access all around the building. We did a cut test and found that the roof is made up of a 3 inch structural stramit with 2 layers of 1/2 inch fiberboard and mopped on felt. Stramit is a structural and/or insulating panel manufactured from straw fibre typically in 50mm or 64mm thickness used as roof deck and/or insulation. The problem with this kind of roof is that the vapor barrier is skin of the stramit and comes in 4 x 8 sheets. This means that any patch would have to be at least to the nearest roof truss and be supported with 2 x 4 boards under the cuts of the stramit opening. Now for any warrantied work, you should tie in the stramit vapor across the patch and this needs to be done from underneath after the patch is applied. This would also require a 3 x 3 foot hole to be cut out of the ceiling and should be handled by the client ahead of time. The other option is to replace a full sheet of stramit which may include a new complete tie-in around the next curb beside it depending on the layout of the stramit and would open a whole other potential problem. We could just cover the hole with 1 inch plywood, no insulation, glue a peal and stick and torch cap the BUR, but I would not suggest warranting this kind of repair especially right on top of a large commercial stove. Another issue on the roof is the amount of grease that has been dumped on the roof will require a larger patch since the membrane close to the curb will not support a proper tie-in of 2 ply torch patch. This will require a 4 ft area of membrane and spud roof beyond the patch all the way around. With a repair with the least amount of stramit replacement and a vapor barrier, we would need the following material to complete the work: 1 - 4 x 8 sheet of 1 in plywood. 2 rolls of cap. 2 rolls of torch grade peal and stick. 1 - 5 gal can of SAM adhesive. 1 sheet of 3 inch ISO. 8 - 2 x 6, 10 ft boards to stacked and secured to the roof. 2 - 2 x 4, 8 ft boards to support the stramit. 2 - 4 inch gum boxes. 1 pail of gum. Assorted screws. 1 can of spray primer. 4 pain brushes. 2 roller sleeves. 2 tubes of acoustical sealant. 1- 6 x 6 ft pieces of 6 mil ploy. 32 man hrs and a trip to the dump for the garbage for a total of 36 man hours or so. If the new curb is not prepped ahead of us then we will need another sheet of ISO insulation (size to be determined by flange of curb) and plywood to wrap the curb. We would need this information before going to site to make sure we have enough to complete. This will add another 2 man hrs if we have to do this on site. If there is no ceiling access when we are there then add another 3 man hours to cut out and clean up. The new R.T.U. to be installed on the sleepers needs to be installed to maximize the weight distribution over the trusses under the roof and needs to be spotted from underneath along with the new location of the new vent curb and location of the gum boxes before we go to site.March 13, 2015: Update. Scope of work discussion with client.
The client just texted me back and requested another 2 curbs, 1 for an exhaust vent and 1 for an intake vent for the RTU to sit close to the sleeper which would add another 8 man hrs to the job and that he has requested that we wrap all 3 curbs with ISO and plywood which brings us up to 40 man hrs for 1 deleted curb, 3 new curbs to be installed and wrapped, 2 sleepers, 2 gum boxes.March 18, 2015: Update. Scope of work change.
Client has requested a change in scope. Customer wants two curbs roofed in holes cut and framed in and 2 sleepers installed after looking at his drawing and where the placement of holes are I do not think we will have to cut any trusses. The holes will be in between. The one thing that concerns me is the amount grease on the roof. Material list looks good but as for man hours I'm thinking more like 45 man hours or more.
Today we deleted an old unit and added two curbs for new units. This was a difficult task as the roof is really old and quiet frankly falling apart. There was also a section 6 feet x 7 feet that we had to remove because the grease from the grease trap had saturated the roof. Once we got that all cut out and insulation and ply wood replaced we then roofed in the curbs and replaced the grease section.All that is left to do is torch cap on the curbs and then add two sleepers and roof them in.On a side note there are multiple areas around where we added the curbs that we are positive leak. There are splits in the roof and major blisters. I pointed this out to the customer. I documented the deficiencies.
Installed cap on two curbs and installed two sleepers 48 inch wide and roofed them with base and cap. Installed gum around our spud line to insure no back flow of water. Cleaned up site and loaded all garbage and materials in the truck. Completed fire watch protocol.
You can find more information on our main website for flat roof repair and how to extend the life of flat roof systems.
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.
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.
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.