DoubleCheck Inspections Inc. Roofs

Experienced registered home inspectors view the exterior of a home from a distance. The reason for this is

simple and complex. Simply speaking home inspectors usually like to view the roof line and roofing material.

The roof line is important as it tells us about the structure of the home. If the ridge at the top of the

roof is not straight then some part of the structure has settle and we could be into a serious repair. This

is not common, however on older homes settlement and compression of wood members is not uncommon and can

lead to this. Garages and barns have this happening more commonly as they are loaded from the top down. Most

roofing systems are designed to carry loads from the top like wind, rain and snow. Roofs are not designed to

have items pulling down from the under-side. We do not suggest any one travel on the roof unless they are

have proper training.

Repairing or bringing a building back to its original form can be quite complex and costly as it is not just

a matter of jacking up the centre portion of the building. All components of the building must be taken into

consideration. It is the impact on the wiring, plumbing, drywall/plaster, windows, chimneys, glazing, etc.

that must be considered when renovations are to take place. In addition what was the reason for the

structural problem? Can it be corrected easily or do we leave it alone as it is?
Roof coverings may be galvanized steel, anodized aluminum, slate, cedar shakes, wood shingles, asbestos

composite materials, asphalt shingles. Roof covering materials have a wide range of potential life

expectancy from 10 years to 50 years to life time, (what does life time mean, check with the supplier). The

most common type of roof covering today is asphalt shingles. If you are purchasing a building that has a

newer roof covering then you should seek out from the vendor if the warranty is transferable and also how

old is the roof. Generally speaking a roof with a 25 year shingle will not last this long as winds, rain,

hail, ice damming all impact the roof in a negative way.
Roof should be reviewed every 3 to 5 years by a qualified roofer. Sometimes there is nothing wrong sometimes

it is just a lifting shingle or split caulking. Regardless they need to be review.
Pay the money now, the savings could be quite substantial by having your roof properly sealed now hopefully

this will save you down the road when from repairing the leak, the damaged roof sub-structure, the damaged

insulation, drywall, paint, flooring, etc.
Not all roofs are safe for the home inspector to walk on. Depending upon the pitch of the roof and materials

used will be factored into whether or not your home inspector will venture onto the roof. Generally speaking

we do not walk on metal, wood or slate roofs. Only if the inspector feels comfortable will the roof be

walked on and it is for this reason that all roofs should be inspected every 3 to 5 years by a qualified

roofer.
Roofs can be damaged by walking on and also by snow, hail, wind, trees, moss and ice damming. A good time to

have the roof inspected is in the late spring, summer or early fall.
If repairs are required then they can be done by the expert under ideal conditions and the roofing materials

will be flexible and will adhere correctly.

Roof leaks can be attributed to tree activity, lack of maintenance, poor installation, and incorrect

repairs. A leak could be found by the registered inspector with the use of thermographic equipment. Infrared

thermographic equipment is sensitive to temperature differences so a water leak should be a different

temperature than the foundation and surrounding materials and could be identified by a Thermal/Infrared

Thermographer, Level IIRoofs

During the home inspection we found this roof which has trees dropping branches and the trees also over

shadowing the roof. With minimal sunlight moss will grow and pre-maturely deteriorate the shingles.

Roofs 1

The home inspection of this roof, (above) shows a torched on roofing system. We can easily see damage from

persons walking on the roof either on a hot day or during installation. We could not see this from the

ground. If possible the qualified registered home inspector should get onto the roof as this was not visible

from the ground. If the tar is exposed then deterioration will start soon.

Roofs 2

 

 

 

 

 

 

 

 

 

 

The only way to inspect this part of the chimney is by getting on the roof. This view is looking down from

the upper side of the chimney. The caulking has split and could let water rundown the side of the chimney

and eventually leak into the home.

Roofs 3

 

 

 

 

 

 

 

 

 

 

During the home inspection from the ground, we had suspected loose flashing. On the roof we proved this.

This flashing for the plumbing stack was never properly attached to the roof. The plumbing stack flashing

should have been nailed and caulked.

 

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