How To Determine Length Of Roofing Nails

Calculate your roof's size and guess how many bundles of shingles, rolls of felt, and squares of covering cloth you demand for a new roof. Add together the price per foursquare for materials to get an estimated material price.

How to Judge the Size of a Roof

If yous're replacing a roof, the first consideration needs to be the roof's size so y'all tin can accurately guess project materials.

In the U.South., roofs are measured in square footage, and roofing contractors typically quote projects based on the size of the roof in squares. Consequently, gathering the size of the roof in squares and square footage is the first step.

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Find the Surface area of the Footprint of the Roof

To calculate a roof'due south dimensions, you need to measure the roof as if it were flat, so business relationship for roof pitch, calculate foursquare footage, and finally determine how many squares of fabric are required for the roof.

The figurer to a higher place tin handle all of this, simply enter the length, width, and pitch, and it will decide the size of the roof in squares.

Start by measuring the roof's length and width in feet every bit you lot're continuing on the basis. Recollect that the length and width need to exist establish for the roof, not the firm, so take into account that the roof overhangs the building.

Then determine the area of the roof as if it were flat. Multiply the length by the width in feet to get the area measurement.

Finding the Total Roof Surface area

Once the area of the roof'southward footprint is known, the overall roof area tin be constitute past accounting for the roof's pitch. The pitch of the roof is the rise over a 12-inch run. Apply our roof pitch calculator to find the pitch of your roof.

Next, multiply the footprint of the roof by the multiplier below for your roof pitch to observe the overall roof expanse.

For instance, a iv/12 pitch roof that is 100 square anxiety:

100 × one.054 = 105.4ft^two

Roof Pitch Area Multipliers

Multipliers for mutual roof pitches that can exist used to find the total area of a roof.
Pitch	Multiplier
0/12	1
1/12	1.003
ii/12	1.014
iii/12	1.031
4/12	1.054
5/12	1.083
vi/12	ane.118
vii/12	1.158
8/12	one.202
9/12	i.25
10/12	1.302
xi/12	1.357
12/12	ane.414
13/12	1.474
14/12	ane.537
15/12	1.601
16/12	1.667
17/12	1.734
xviii/12	1.803
19/12	1.873
xx/12	one.944
21/12	2.016
22/12	2.088
23/12	2.162
24/12	2.236

Finding the Size of the Roof in Squares

Roofing contractors judge projects and materials by the square, and so information technology is crucial to find this measurement to estimate the amount of textile needed accurately. A square simply refers to a x′ 10 10′ foursquare of roofing. This is but 100 foursquare feet of roof.

To find the squares, separate the overall roof surface area past 100 and and then round upward. For instance, if the roof is 1550 square feet, then it is 16 squares.

How to Estimate Roofing Materials

Although roofing projects are estimated and sold by the square, roofing textile is oft not sold in 1 square increments.

How Many Bundles of Shingles Volition You Need

The average package of shingles covers 33.3 ft², then three bundles of shingles are needed per square. Asphalt shingles range in cost from almost $25 per packet for a standard 3-tab style to around $50-$75 or more than for an upgraded architectural mode.

Since transportation is a major toll factor, expect prices to vary past location. A typical bundle of shingles weighs virtually 75 pounds, while some premium products can weigh over 100 pounds per bundle, so consider commitment of materials.

How Many Rolls of Felt Volition You Need

Covering felt is sold by the roll. The boilerplate roll of xv-pound roofing felt covers nearly 400 ft^two, or 4 squares, while the average roll of thirty-pound roofing felt covers near 200 ft^two, or 2 squares.

Rolls of felt are 36″ wide ten 144′ long for 15# and 72′ long for 30#. Consider other underlayment options equally needed, such as rubber or tar products.

How Many Nails Will You Need

Nails will also be required for any roofing project. The average 3-tab shingle needs four nails per shingle. High wind areas and other types of shingles may need more. 320 nails will exist needed to install a foursquare of standard iii-tab shingles, assuming iv nails per shingle and eighty shingles per square.

Other Materials

Go along in mind that a drip-border will be needed to protect the roof's edge from rot, vents, and other materials such as flashing or caulk. Also, consider that the fascia boards may need to be replaced depending on their condition.

Drip-edge and fascia boards are sold past the linear foot, detect the perimeter of your roof in feet to find the length of drip-border and fascia boards needed.

In addition to accurately estimating materials, it is important to make sure you order extra cloth when ordering. Account for nearly 5-10% overage on your projection to brand sure you take enough material if measurements are a little off or material is wasted or damaged. This is more than critical for materials that are special-order or take long pb times.

Nosotros recommend getting free covering estimates to understand textile and labor costs and identify other project complexities that could affect the cost.

Other Considerations

There are another factors to consider when installing a new roof. Learn most the costs of installing a new roof. Many localities require permits and inspections for covering projects; bank check with your local inspections function and consult local building codes for more data on the requirements.

Likewise, consider that removing erstwhile materials may be a expert idea and volition crave disposing of a large amount of waste. Programme ahead for this past ordering a dumpster for the project.