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.
All roof programs begin with inspections.

How Can I Gain Better Control Of My Company’s Roof Assets?

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.

An Infrared Roof Inspection Will Save You Time and Money

What Is It?

An infrared roof inspection involves the use of an infrared camera to detect areas of wet insulation under the roof membrane. It is an excellent diagnostic tool in that it can provide a great deal of information about the condition of your roof system that is not available upon visual inspection alone. For roughly pennies per square foot, you can gain the knowledge necessary to prevent an expenditure of several dollars per square foot.

Roof Surface as seen during day-Roof Surface as seen by infrared camera (brighter areas indicate wet areas of insulation)

Why is Wet Insulation a Concern?

Undetected wet roof insulation is the primary cause of premature roof failure. It can and will cause the following problems:

  • Deterioration of the roofing membrane, insulation, and even the roof deck itself
  • Increased heating and cooling costs due to the deterioration of the thermal efficiency of the insulation (Wet insulation does not insulate.)
  • Delamination of the entire roof assembly due to freeze-thaw cycles of wet materials
  • Addition of unwanted loads to the building structure (Wet insulation is heavy.)
  • Formation of molds and potential health hazards for personnel
  • Premature and costly roof replacement

How Can a Thermographic Scan Save Money?

Identification of potentially serious problems such as roof failure or mold before they become dangerous and expensive. By the time a problem with the roof becomes apparent because of a leak or other obvious warning sign, serious damage may already have occurred to the roof and/or building structure since wet insulation can go undetected for quite some time. Once a roof system fails, costs immediately begin to multiply as a result of:

  • Costly roof replacement
  • Potential for structural damage to the building itself
  • Damage to expensive interior assets such as equipment and furniture
  • Lost productivity due to asset loss and reconstruction
  • Health and safety liability concerns: injuries, mold, etc.

Identification of early, much less expensive repair or maintenance solutions. If wet insulation is detected early enough or in only small localized areas, many opportunities exist for solutions at a fraction of the cost of the expenses listed above:

  • An aging roof system with minimal or no wet insulation can be restored at less than half the cost of replacement
  • Preventative maintenance repairs to prolong the life of the roof
  • Localized replacement (only some sections of the roof are replaced)

Example of a mini roof inspection:
Inspection Report

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.
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