What are the boxes on my roof?

Most of them are for ventilation. The largest boxes are attic vents and work in combination with vent openings in the soffit (underside of roof overhang) to utilize the natural convection flow of rising hot air, which is pulled in through the soffit vents and flows out at the attic vents near the ridge of the roof.

What are the small boxes on the roof?

The box vent earned its name by simply looking like a small box on the roof. It can be various colors, but it is usually black or gray to make it less distinctive. Box vents are placed over a hole cut into the roof, and while high on the roof, they are rarely placed near the ridge or peak.

What are those things on roofs?

Snow guards or snow brackets are roof-mounted metal “spikes” installed by your roofing contractor and designed to hold large amounts of snow in place and prevent them from falling in one big chunk. For areas prone to heavy snowfall, snow brackets can be an extremely useful addition.

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What are black squares on roof?

The black streaks running down roofs are actually a hardy algae called Gloeocapsa magma. As the blue-green algae accumulate, they develop a dark, hardened outer coating, which results in the black stains you see. The algae feed on the limestone in shingles.

What are the black things on top of houses?

Although these dark spots and ugly black streaks on your roof may look like dirt, mildew, soot or mold, what they really are is algae. The most common type is known as gloeocapsa magma—also known as blue green algae. This algae growth usually begins as small spots and then eventually becomes visible streaks.

What is this metal box on my roof?

Most of them are for ventilation. The largest boxes are attic vents and work in combination with vent openings in the soffit (underside of roof overhang) to utilize the natural convection flow of rising hot air, which is pulled in through the soffit vents and flows out at the attic vents near the ridge of the roof.

What is ridge on roof?

Roof Ridge: The roof ridge, or ridge of a roof is the horizontal line running the length of the roof where the two roof planes meet. This intersection creates the highest point on a roof, sometimes referred to as the peak. Hip and ridge shingles are specifically designed for this part of a roof.

What are roof boards called?

Sheathing: The boards or sheet materials that are fastened to rafters to cover a house or building. Soffit: The finished underside of the eaves.

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Why do some houses have spikes on the roof?

The roof spikes have extra long pins that stop not only birds such as pigeons, but also larger birds like seagulls from landing on roofs. They therefore prevent the birds from fouling and roosting on your home and business.

What is a Perling?

A purlin (or historically purline, purloyne, purling, perling) is a longitudinal, horizontal, structural member in a roof. In traditional timber framing there are three basic types of purlin: purlin plate, principal purlin, and common purlin.

What are box vents?

Box vents are the most common vents you’ll see on a roof. They’re sometimes also called a 750, and they’re the more economical option. Box vents are placed around the roof toward the ridge, since they’re meant to give the warm, moist air in your attic a place to go, and as we know, warm air rises.

What is a turtle roof vent?

Turtle vents are also called box vents or louvers. They are spaced evenly across your roof and installed close to the roof’s ridges. This type of vent is extremely easy to install or add to an existing system.

What is roof algae?

What is Roof Algae? The black mold-like stains and streaks that appear on roofs, particularly light-colored asphalt shingles, is actually a blue-green algae (Gloeocapsa magma). Commonly found in climates with warm, humid summers, it does no damage to the roofing, but it certainly does looks bad.

Why are my roof shingles turning black?

Answer. Those black streaks on your roof shingles are most likely an algae called gloeocapsa magma, or as it is more commonly referred to, a blue-green or black algae. Algae is a solid deposit of spores and dirt, another form of mold. … Do NOT pressure wash your roof; one wrong angle and you can damage the shingles.

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What can I use to clean my roof shingles?

of laundry strength liquid chlorine bleach and water. This is the best way to clean a roof if you have asphalt shingles. After spraying the roof with the mixture, allow it to sit on the surface for 15 to 20 minutes before rinsing thoroughly with clean water.