In most cases, 4 nails are adequate. Position the nails appropriately according to the shingle installation instructions. Align shingles properly to avoid nail exposure.
How many nails do you put in a 3 tab shingle?
NAILING: Use galvanized (zinc coated) roofing nails, 11 or 12 gauge, with at least 3/8″ diameter heads, long enough to penetrate through plywood or 3/4″ into boards. Use 4 nails per shingle placed 6-1/8″ above the butt edge, 1″ and 13″ in from each end and 1/2″ above each cutout.
How many nails do you put in each starter shingle?
Each shingle should be held by four nails. Six nails are preferred for areas that experience wind.
How long should nails be for 2 layers of shingles?
The length of each nail must be a minimum of 1¼ inches long, and for roof-overs, Atlas recommends a nail length of at least 2 inches. Measure each area of the roof, in feet, to determine how many shingles will be needed. Multiply the length of each area by the width to determine the square footage.
Why are 3 tab shingles bad?
Three-tab shingles are weaker, less durable, and not as long-lasting. They can be subject to damage in areas or regions of the country that experience reoccurring bad weather.
How many years does a 3 tab shingle last?
They stand up better to weather conditions such as heat, snow, ice, rain, and strong winds. Their average lifespan is about 18 to 20 years. However, they may last up to 30 years under optimal conditions. When 3-tab shingles are exposed regularly to severe weather, they may last about 7 to 10 years.
What kind of nails do you use for shingles?
What Type of Nails Should be Used with Shingles? For best performance, you should use ring roofing nails that are made of hot‐dipped galvanized steel. You should use 12-gauge or thicker. The length of nail you use depends on the thickness of the sheathing and shingles you use.
Is it better to hand nail shingles?
Some roofers believe hand-nailing shingles gives them more control over the process. They can use “feel” to determine if the nail is deep enough and in the right location. Since hand-nailing takes a bit more time, they have the chance to correct any mistakes on the spot. On the other hand, labor costs will be higher.
Can you nail through a shingle?
Is It Safe to Nail the Roof? Driving even a single nail into your roof can compromise the entire system. Nailing will puncture the shingles and underlayment of the roof, creating a hole where water can enter when it rains. Keep in mind that even the smallest leaks can result in expensive roof repair costs.
How much should shingles overhang drip edge?
Asphalt shingles should overhang the exterior edge of the drip edge by ¼ to ¾-inch. Check local building code for drip edge requirements prior to the start of your roofing project.
Are starter shingles required on rakes?
Starter shingle should be installed around ALL edges of your roof. To meet code, technically it only needs to be installed on the bottom eaves, but there are some big benefits to installing it up the rake edges as well (also known as gable edges).
How far should shingles hang over gutters?
Most shingle manufacturers recommend a 1/4 to 3/8 inch overhang over your eave, which is where your roof ends by your gutter. In many cases, and particularly as home ages and settles, the roof edge at the eave edge can wave in and out by more than this amount.
Is it OK to put new shingles over old?
The answer is yes, you can lay new roof shingles over old ones. … You can’t do it with wood or slate, for example, and you should never mix materials, such as laying asphalt shingles over cedar shakes. Also, the old roofing has to be in pretty good condition.
Is 2 layers of shingles OK?
As mentioned above, homeowners are legally limited to two layer of roof shingles. Therefore, if you already have two layers, you’ll need a full tear-off. Additionally, if your roof is severely damaged, it likely won’t be able to support the weight of a reroof and will need to be torn off.
Is it OK to put 2 layers of shingles?
A second layer of shingles will decrease the integrity of your new roof and lower its lifespan. That’s because shingles aren’t designed to have a second layer of shingles on top of them! Plus, all that extra moisture and heat being applied to the first layer of shingles will make that first layer age faster.