How Many Shingles To Roof My House

It is common to use 3 bundles to a square of shingles.

How many shingles to roof my house.

1square of roofing covers 100 square feet of roof a bundle is 1 3 of a square. Measure the length and width of each rectangular or square area of the roof and multiply the length times the width to gain the total. Roof length measured in feet roof width measured in feet roof pitch roof type either gable or hip. If a roof insurance estimate says it will take 25 33 sq to re roof my house and the roofer gets out and after removing the old shingles determines it will need to have new wood put down due to rot and age then about how many sheets of plywood should it take.

It requires 18 squares of shingles. This roof shingle calculator requires four basic inputs. The average bundle of shingles covers 33 3 ft 2 so three bundles of shingles are needed per square. Divide the total footage by 100 to determine the number of squares in the roof.

Nailing new shingles over existing ones is less expensive and faster requiring less labor but it also means you lose the chance to assess the sheathing for signs of water damage. Since transportation is a major cost factor expect prices to vary by location. It takes 3 bundles to cover a square if you use 3 tab shingles the most common type. Shingle roofs typically have a life span of 15 30 years while membrane roofs usually last 5 15 years.

For the number of ridge caps multiply the length of the hip or ridge by twelve and divide it by five. 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. Get the square footage of roof and divide it by 100 and it will give the number of squares you need and for every decimal number over 3 buy a bundle to achieve the amount of material. 3 determine the bundles of shingles needed to cover the roof.

Measure the length of the bottom of any triangular shaped portion of the roof. However if you are using heavier shingles you will require 4 to 5 bundles for a square. If your roof is in good shape but has some damage to one side from a downed tree or has lost shingles in a wind storm an overlay is worth considering. This house is 1000 square feet.

When you are using 3 bundles for a square you will be getting 29 standard shingles in each bundle. Most building codes allow for two layers of asphalt shingles on a house so stripping off everything down to the plywood sheathing may not be your only choice.