Your roof serves to protect your from the moisture that is in the elements. It seems that ventilation would be the last thing that you would expect your roof to have. After all, we are trying to keep the elements out, not open up the roof and expose ourselves to the open air. However, ventilation is a vitally important aspect of your roof’s maintenance. There is a great deal of moisture that accumulates in a home. This moisture, like heat, rises and works its way to the top of your home. Without ventilation, this moisture would accumulate and cause great deterioration to the top of your home. Ventilation allows this moisture to escape.

Likewise, ventilation also helps to bring balance to the moisture that accumulates on the roof as well. Ceiling fans, vents and ridge vents all comprise part of the ventilation system and ensure that the home, attic and roof have ample air to release moisture. The roof ventilation systems consist of both intake and exhale vents. These vents ensure the balance is regulated between the roof and the attic.

If your home doesn’t have proper ventilation, you will experience a number of problems. First, moisture will accumulate and may cause various parts of your roofing system to deteriorate. You may notice that the shingles become warped or loose and may slip off. If the water damage extends to the underlayment, you may see warping or buckling of the wood underneath the roof. This can lead to structural damage and may extend into the trusses or rafters. If these structures become damaged, they may fail to support the roof. It is extremely important that your roof has ventilation according to code specifications and that you ensure that the ventilation system is working properly. The best way to ensure that your ventilation system is installed properly is to have a professional roofer do the work for you.

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I have a flat roof that has been previously patched with black tar and white (not sure what this is) material. One roofer told me black tar will deteriorate over time with ultraviolet exposure. Is this true? Ist the white (elastomeric?) patch better? The patching will be done in a small area condusive to ponding. Any recommendations on products and methods is appreciated. Thanks!

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My roof decking does not meet the fascia, thusly there are gaps where a rodent can get in. A roofer said this isn’t a problem because most rats, squirrels, etc. would have a difficult time lifting up the shingles to get into the openning and thusly the attic. But as we know, rodents can slip into the smallest of openings. It didn’t make me feel better but he said at least half of all homes, the decking doesn’t meet the fascia. At first, I asked about flashing my roof line to cover up the holes, but since I have gutters, he recommended that I put gutter screens. He said it would accomplish the same thing as flashing by covering up the gap and it would keep the rodents above the roof line and not give them a craddle, that being the gutter to sit in. Any one familiar with gutter screens or is flashing the better option. Either way, it will be pricey.

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A roofer is dragging a 15.0-kg bundle of shingles up the roof using a light rope parallel to the roof. The roof is sloped at an angle of 30.0° with the horizontal.
a.Draw a free-body diagram of the forces involved.

b.What is the force component perpendicular to the roof of the weight of the bundle of shingles?

I drew the diagram, but I really don’t understand what part b is asking me for… Do they want me to state “the perpendicular force”? do they want a value? what do they want??

THANKS!

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Here i am showing how to properly pass a pipe on a roof.I’ll be posting better ones in the future.

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