Below is the collection of field reports for an industrial roofing system repaired by GRS in April 2012.
Table of Contents:
Initial Inspection: April 17, 2012:
The sealants on all 9 roof levels are deteriorated and require attention.
One drain was found to have a great deal of debris blocking the way for water. It was cleared as best as possible, but is still draining slowly.
The EPDM roofs (of which there are 2 from the total 9) seem to be in good condition. The metal lining the parapets are also in good condition.
Building Structure Interior - Very good condition
Building Structure Exterior - Very good condition
See 'Sealants' (above). Several of the EPDM plumbing boots, wire boots etc. are damaged. This can be seen in cases where the caulking has been worn away or when there are holes in the rubber itself.
Air Conditioning Units
We found that much of the flashing sealants have cuts and abrasions. There is moisture is getting through that needs to be addressed.
We found punctures in the metal roofing, but did not observe any in the EPDM as it is covered with large ballast (approximately 1 to 1.5 inch gravel). The client, however, has reported many leaks in that part of the building, so openings of some sort must be present. We will need investigate further.
For the most part, the ballast is adequate and well-distributed.
It is very difficult to pinpoint where the moisture is entering on the EPDM portions of the roof, however it appears to coming in in several areas. Several offices within the building have experienced substantial leaking.
This is a very large structure and would benefit from regularly scheduled maintenance. Many of the current issues could have been mitigated before becoming a problem.
Roof dimensions are:
Roof Report, May 28 2012:
- 55' X 112' EPDM.
- 38' X 51' EPDM.
- 60' X 51' METAL.
- 128' X 97' METAL.
- 125' X 97' METAL.
- 158' X 80' METAL.
- 77' X 25' METAL.
- 77' X 57' METAL.
- 38' X 47' METAL.
Two of our crew arrived to the job site for 9am and began conducting some of the smaller repairs necessary.
- 2 tubes ms detail.
- 1 tube of barr.
- 2 tubes lap sealant.
- 4 ft. of cover tape.
- Splice adhesive.
They left the site for 5:00 pm, scheduled to return the following day (May 29).
Roof Report, May 29 2012:
Crew members investigated the leaks on the upper and lower EPDM roofs. They found improper rubber detail on the walls, and a corner termination. The installation of the EPDM near the roof access doorway was in a poorly state as well. They re-glued and secured the EPDM along the wall and patched several holes from staples, nails, or other rooftop debris.
The flashing atop one of the offices was removed where there were signs of recent water ingress. They brought EPDM up and over the wall properly and replaced the metal that sits on top of it. After this, they moved to the upper roof had a 'popped' corner in the EPDM, as well as a pipe boot's flashing was left uncaulked (large, open gap). There were other holes located in the metal portion of the roof, which have now been sealed up properly. A pipe boot, however, appears to have been cut at some time which left an open hole and some semi-exposed wiring. We put a temporary seal on it for the night, and plan to cover it with plate or suitable flashing the next day.
Roof Report, May 30 2012:
Today, we finished the repairs to the roofing system. Virtually all of the penetrations (roof vents, jacks, boots, etc.) were missing sealant, so we reapplied some and ensured that they would be watertight. There was also caulk sealant around many curbs in poor shape that needed removal and reapplication. We used MS detail to reseal them (as well as some roof jack edges), using mesh to bridge the cracking or exposed edges. One of the metal walls along the roof needed the entire base resealed due to badly failing sealant. MS detail and mesh was used again to address this spot.
There is a gutter on the roof in bad shape that will need to be repaired or replaced. This may have been caused by a heavy snow pack sliding down towards the gutter; a snow brake may be useful in this location.
The last point of note is that the sign on the roof may need to be looked at in the future. There are holes in the metal from nails or screws tearing through in a couple of locations. It's difficult to get a proper view without getting more invasive, but this may be a concern in the future to be mindful of.
This report is ongoing and will be updated as more information comes in.
Call our 24 hour emergency roof repair at 1.780.424.7663. Mail to: 3428 99 Street NW Edmonton, Alberta T6E-5X5.
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