Roof Inspection

Everything starts with an inspection.

Even the strongest and most durable roof can have some weakness.Over time a roof may incur damage that an untrained eye can not see. Roof inspection can help prevent structural damage to the roof and ultimately the building.  An annual inspection by a qualified commercial roofing consultant can help you save money and protect your investment.

There are several types of roof inspections:

• Visual Inspection
• Technical inspection
• Infra-Red Inspection
• Moisture probe inspection

Each has a different purpose and serves of better understand your roof system condition.

As part of our unique approach, Global Roofing offers a free comprehensive customized report to help building owners and managers assess, organize, and budget for all of their Ontario roofing needs. The following outlines the typical sequence of events involved in setting up a customized detailed roof report for a customer:

1) Visual inspection of all roofs including core cuts by a Global Representative.

2) Comprehensive customized report is submitted to you and will include the following:

• Conditions of all roofs described in detail
• Recommendations for any necessary preventative maintenance, restoration, or replacement work
• Photographs to illustrate findings
• Thermographic scans recommended where necessary
• Budget figures and a timeline of necessary projects so that necessary expenditures can be properly planned, and large unanticipated expenditures can be avoided.

A roof inspection was performed on September 1, 2005. The roof is between 20 and 25 years old, if not older, and is at the end of its life expectancy.

One section of the roof (Section A) has been replaced within the last 5 years is in good condition. 80% of all roof leaks occur around flashings and the perimeter flashing has started to deteriorate (Photo A). Preventative maintenance is required to stop the deterioration and for comparison, I have attached a photo of ignored deteriorating perimeter flashing (Photo B). At present, the flashing in Photo B is beyond a simple repair and to this flashing is extensive and expensive. It is important to note that a roof will dry out – not wear out.

The remaining roof sections are in very poor condition. There are presently 5 leaks throughout the facility that can be attributed to the age and condition of the roof. Most roof conditions associated with an old and dried out roof are present and extensive. I have attached photos of the present roof conditions, the photos are meant to be a representation. I have described what the condition is and the cause of the condition with the cost of neglect.

A.) Blisters (Photo C, D, E & F): Soft spongy pockets or swellings in the roofing material, they occur between layers of felt or between the roof membrane and substrate. Air or moisture vapor entrapped within a blister expands as the roof and outside air temperatures rise and this results in sufficient pressure to push the roofing felts upwards and apart.

B.) Cost of Neglect: Blisters may be ruptured by roof traffic, expanding frozen water, or hail (especially during colder weather). Some blisters may become so large as to affect drainage, which may then cause pounding water. Laps could also be pulled apart, resulting in leakage. A ruptured blister will immediately allow water to penetrate and damage the roof system.

C.) Perimeter Flashing Deterioration (Photo G & H): Expansion and contraction movement of the metal edge causes a sawing action that cuts into the perimeter flashing (Roof condition we recently fixed). Cost of Neglect: Moisture can then enter the roofing system and building and moisture entry will cause damage to the insulation and reduce its insulating properties. It will also allow water to enter the building causing internal damage.

Learn more about the Global Roofing Services offers, including roof repair in Toronto and much more. At Global Roofing, we are dedicated to helping you get the best results for all your Ontario and Toronto roofing needs.