Monday, April 30, 2012

Flat Roof Replacement - Repair, Replace, or Recover?

Flat Roof, Roof Inspection, Roofers
Roof Inspection Photo of Moisture Test
Roof Replacement
Flat Roof Repair, Replacement, or Recovery - When is a Roof Recover Not Possible?

We have been attending the roof below for some time assisting the owner of the condo with a poorly installed flat roof installation.

The flat roof was installed in the last three years and it fails. The insurance company has a "consultant" that is advising the owner of the building have the flat roofers install another roof over top of the existing roof assembly to save money vs. complete roof replacement. In this instance this is not a good idea at all as the existing roof assembly is not only installed incorrectly, it is also saturated with moisture.

If your existing flat roof is soaked with moisture you cannot apply a retro-fit or roof recovery over top of the old roof. Now, if there is less than 30% of the roof insulation or roof deck soaked it may be worth the money to just replace the areas of roofing that are soaked and then install another flat roof over top of the old one. But in this instance the majority of the roof is saturated.

Here is the roof core test report from the roofers at General Roofing Systems Canada (GRS):

Roof Core Samples: April 26, 2012 Roof Inspection Report
Condo, Cut Tests, Multi Family _ Flat Roof _ Replacement 
Inbox 
brian.b@grscanadainc.com
Apr 26
to Info, admin 
Cut test at _____, Alberta.
We arrived on site around 2:30 for the roof inspection and we gained access to the roof by a hatch.  Then we did 3 cut tests and obtained core samples of the roof assembly. This roof is leaking in many areas, and requires immediate repair and more preferably replacement. 
Cut 1 - back left hand side of roof by chimney.  We found that the Sopra-board and the 2" fiber board were totally soaked wet and saturated, broken down and deteriorated.  (See attached pictures)
Cut 2 - in the middle of the roof.  We found that it was totally dry but the cap sheet was installed incorrectly.  It was not adhered to the sopra board.
Cut 3 - back right hand corner of roof by satellite.  We found that the sopra board and the 2" fiber board were totally soaked wet and saturated, broken down and deteriorated. (See attached pictures)
Darryl, the Inter-Provincial Red Seal Journeyman Roofer recommended the samples required were not a good idea because he did not want to create a void in the roof and cause more roof leaks.  We patched up all cuts with ms detail topped with gray granules.  Darryl recommends that the whole roof be replaced.
Brian




Flat Roof with ponding.

Ponding causing roof leaks.


Excessive water can cause deck or framing to deflect.

Poor flashing detail on roof.





The weight of soaked roofing material is weighing down roof.



Water saturated roofing material.

Deficiency in torch on SBS modified roofing.





Poor workmanship is to blame for roof failures.










Patching roof after cut tests done for moisture test.



Cut test to roof membrane.






For roof inspection, repair, or replacement call us at +1.877.497.3528 toll free to be connected to a technician in your area or click here for an online roof estimate request form.

Until next time,


The Team at GRS

1.877.497.2528 Toll Free

ABOUT US:

General Roofing Systems Canada (GRS) is a Roof Repair and Roof Replacement Contractor Serving British Columbia, Alberta, and Saskatchewan. Roofing Calgary, Red Deer, Edmonton, Fort McMurray, Lloydminster, AB, Saskatoon, Regina, SK, Medicine Hat, Lethbridge, Canmore, Cranbrook, Kelowna, Vancouver, Whistler, BC and points between.

CONTACT US:


Mailing:
General Roofing Systems Canada (Calgary)
240 - 70 Shawville Boulevard SE
Suite 1460
Calgary, Alberta Canada
T2Y 2Z3
+1.403.873.7663 Service
+1.877.497.3528 Toll Free
+1.403.387.0318 Calgary Shop
+1.403.617.9803 Project Manager Direct (Mobile)
calgary@grscanadainc.com

Calgary Shop:
76 – 4807 32 Street SE
Calgary, Alberta Canada
T2B 2W1

Visit our Calgary Flat Roofing blog!


Mailing:
General Roofing Systems Canada (Edmonton)
3428 99 Street NW
Edmonton, Alberta Canada
T6E 5X5
+1.780.424.7663 Service
+1.877.497.3528 Toll Free
+1.780.800.4947 Project Manager Direct (Mobile)
edmonton@grscanadainc.com

Edmonton Shop:
3 - 12916 156 Street NW
Edmonton, Alberta Canada
For deliveries call in advance.


Mailing:
General Roofing Systems Canada (Vancouver)
1489 Marine Drive
West Vancouver, BC Canada
V7T 1B8
+1.604.261.7663 Service
+1.877.497.3528 Toll Free
+1.604.800.4353 Project Manager Direct (Mobile)
vancouver@grscanadainc.com

For roof repair, maintenance, or replacement in other areas of British Columbia, Alberta, or Saskatchewan click here for our roofing service regions or call +1.877.497.3528.

Article Topics; Flat Roof, Roof Inspection, Roofers, Roofing, Roof Replacement, Roof Repair, Flat Roof Replacement, Calgary, Calgary Roof Repair, Edmonton, Vancouver, Red Deer, Fort McMurray, Lloydminster, AB, Saskatoon, Regina, SK, Medicine Hat, Lethbridge, Canmore, Cranbrook, Kelowna, BC, Whistler, British Columbia, Alberta, Saskatchewan.