## How do I calculate how many shingles I need?

How Many Roofing Shingles Do I Need?

1. Measure the length and width of each plane on the roof (including dormers) then multiply length times width.
2. Add the square footage of each of the planes together.

## Can you put shingles on plywood?

A: It is never a good idea to install a roof over wet plywood or any type of roof sheathing. Trapped water will boil when the sun heats the roof and the shingles will then have small pits where the steam finally escapes.

## How many bundles of shingles do I need for 1500 square feet?

The average bundle of shingles covers 33.3 ft2, so three bundles of shingles are needed per square. Asphalt shingles range in price from about \$25 per bundle for a standard 3-tab style to around \$50-\$75 or more for an upgraded architectural style.

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## How much plywood is needed for a roof?

Divide the total roof area by 32 to get the number of sheets you will need to cover the roof. A typical 4 foot by 8 foot sheet of plywood covers 32 square feet. If your roof area is 1,600 square feet, 1,600 divided by 32 will mean you need about 50 sheets to cover the roof.

## How much area does 1 pack of shingles cover?

Each bundle covers 33.3 sq. ft. of roof area—which is close enough to the 32 sq. ft.

## How many bundles of shingles do I need to cover 120 square feet?

Each square will need three bundles of shingles to cover it. Find the total square footage of your roof by multiplying the width by the length and then divide that number by 100 and you will get the number of squares you need to cover.

## Do you need plywood under shingles?

Wood Board When the original wood shakes or shingles failed, they were typically replaced with asphalt shingles, which require solid sheathing. Rather than rip off all the spaced sheathing and replace it with solid sheathing, the spaces were usually filled in with additional boards.

## What do I put between plywood and shingles?

What Is Roofing Underlayment? Roofing underlayment is what lies between the shingles and the roof sheathing, or roof deck, which is typically either plywood or OSB. It’s installed directly on the roof deck and provides a secondary layer of protection from the elements, including rain, snow, and wind.

## How many bundles of shingles do I need for a 1000 square foot roof?

Since there are twenty six shingles in a bundle of twenty year shingles (which is fine for starters and edges), divide the result by twenty six. For the number of ridge caps, multiply the length of the hip or ridge by twelve and divide it by five. This house is 1000 square feet. It requires 18 squares of shingles.

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## How many bundles of shingles do I need for 2000 square feet?

The number of bundles or squares you need will depend on the surface area of your roof, and its pitch or slope. For example, a 2,000 square foot roof will require 20 squares or 60 bundles.

## How much does a sheet of plywood cost?

The cost of a sheet of plywood will depend on the size and where it’s purchased. Depending on the thickness, plywood can cost anywhere from \$5 to as much as \$55 for a 4×8 sheet. For example, a 4×8 that 1/4″ thick can cost \$6, while a 4×8 that is 11/32″ thick can cost around \$15.

## How much is a sheet of roofing plywood?

Your price could vary depending on how much the roofing company charges for labor, but generally you can expect to spend between \$70 to \$100 for each sheet of plywood.

## Which plywood is best for roofing?

CDX is the grade of plywood most commonly used for roofing (CDX plywood means it is Construction Grade for exterior purposes).