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Not necessarily. Leaking can result because a portion of the roof has been damaged, or some flashings have become loose. Roof may have had poor or improper work performed on it in the past. A roofing professional can determine the extent of the damage with an inspection.
Roof problems are frequently discovered after leaking or other serious damage occurs. Periodic inspections (at least once a year) can uncover warped or missing shingles, loose seams and deteriorated flashings. Further signs are excessive surface granules accumulating in the down spouts or gutters. Indoors, signs of damaged roof areas may be shown by discolored plasterboard or cracked paint.
Your two basic options are:
1. A complete roof replacement, which involves removing the old roof entirely.
2. A roof repair, which involves the installation of a new membrane and surfacing. This can only be done if the old shingles are lying flat, and the deck is in good condition. (Check with building code compliance.)
If your original roof has already been recovered once, check with a professional roofing contractor to determine if your roof can support an additional recover.
Yes. Many building code regulations require the use of felt along the eave line for both shingles and shakes, as well as for shake interlayment. Also, new warranties often require complete deck coverage. Check with your local building codes.
No. Inadequate ventilation is what causes the underside of a roof to sweat and eventually rot. Good ventilation will not only add many years to the life of the roof, but it will also keep your room cooler in the summer.
The condition of your roof depends on the type of roof you have, the maintenance it’s received and the effects of your local environment. However, the average home’s roof is in need of some type of repair approximately every 10 years.
The most common covering used on residential properties are asphalt roof shingles. In general, they are made with fiberglass mat and asphalt with the top surface coated with mineral granules (sunlight and water resistance), and the bottom coated with materials to prevent the shingles from sticking together in storage or shipment.
Most roofing work should not be “do it yourself.” Professional roofing contractors are trained to safely and efficiently perform a roof repair or replace a cedar or asphalt roof. A novice can harm a roof using improper roofing techniques. They may also injure themselves through falls or other accidents.
The most significant difference is the amount of material that is exposed to the weather. An 18″ shake has 7.5″ exposed. An 18″ shingle has 5.5″ exposed to the weather. Thus, shingles applied at 5.5″ becomes a 3 ply roof (there are 3 layers of shingles at any spot on the roof), while shakes are 2 ply. Shakes are layered with felt between each layer, thus having 2 layers of felt at any spot. No felt is required for each layer of the shingles.
The difference between an organic and a fiberglass shingle is the type of mat that is used in the production of the shingle. Organic shingles are composed primarily of cellulose fibers. Fiberglass shingles are composed of glass filaments of various lengths and orientation, bonded together by inert binders. Both shingles, when installed properly on well made roof decks, perform similarly.
Algae growth is generally seen on light colored shingles. It exists as brown to black discoloration of the shingle and is caused by and algae known as Gloeocapsa.