How Many Bundles of Shingles Are in a Square?

Three bundles cover one square, or 100 square feet of finished roof, for most asphalt shingles including three-tab and architectural laminate. Heavier designer profiles take four or five. Arrowhead Roofing has ordered shingles by the truckload for Tulsa roofs since 1987, so these are the numbers we buy against.

Note: this is a general guide only. Coverage, piece counts, and weights vary by product, and your installer should verify them against the manufacturer’s published specification sheet for the shingle actually going on your roof. GAF publishes those, and so does every other major manufacturer.

Here is what a square looks like across the four profiles, using the manufacturers’ published figures.

The Short Answer

A square is a unit of roof area, not a unit of packaging. It is 100 square feet of finished, weather-exposed roof surface, and it is how every roof in the trade is measured, ordered, and priced.

Bundles are how the shingles are packaged so one person can carry them. Three bundles per square is the norm because a bundle much heavier than that becomes unsafe to hand up a ladder.

The two numbers that move are the profile and the waste factor. Profile decides bundles per square. Waste decides how many squares you order for a roof of a given size, and on a cut up roof that difference is large.

What a Bundle Weighs

Manufacturers do not print shipping weight on most specification sheets, so treat the figures below as planning ranges rather than published values. They are what we use for staging and for deck load conversations.

Two practical consequences. A designer shingle can put close to double the dead load on a structure that a three-tab roof did, which is a conversation to have before the order, not after.

And loading matters. Thirty squares of laminate is roughly three and a half tons of material, and it does not all go in one place on the deck.

Why the Order Is Bigger Than the Roof

Every hip, valley, and rake means cutting shingles, and the offcuts go in the trailer. That is the waste factor, and it is the line homeowners most often suspect of being padding.

Aerial measurement reports quote materials at four waste levels, with the suggested factor driven by roof complexity. The report itself is explicit that the figure is guidance only.

A Worked Example on a Real Roof

Here is an aerial measurement from a Broken Arrow home we roofed, with the arithmetic run out.

• Total roof area: 4,262 square feet
• Facets: 15
• Predominant pitch: 7/12
• Valleys: 116 linear feet
• Ridges and hips: 224 linear feet

Step one, convert to squares. 4,262 divided by 100 is 42.6 squares of actual roof surface.

Step two, apply waste. Fifteen facets and 116 feet of valley is a cut up roof, so 13% is the right factor here rather than 8%. 42.6 times 1.13 is 48.2 squares.

Step three, convert to bundles. Architectural laminate at three bundles per square is 48.2 times 3, which is 145 bundles, and orders round up to the full square, so 49 squares and 147 bundles.

Step four, the things that are not field shingles. 224 feet of ridge and hip needs cap, and 215 feet of eave needs starter. Neither comes out of the field shingle count, and both are separate line items.

The gap between 42.6 and 49 is not padding. It is 116 feet of valley cuts.

Older Tulsa Homes and the Wood Shake Problem

A good part of the older Tulsa housing stock was originally roofed in wood shake, and some of it still is under a layer of asphalt.

The measurement converts cleanly, because a square is a square regardless of what is on it. What does not convert is the deck. Wood shake was commonly installed over spaced sheathing, boards with gaps between them, because the shakes needed to breathe.

Asphalt shingles cannot go on that. IRC R905.2.1 requires asphalt shingles to be fastened to solidly sheathed decks, so a shake to asphalt conversion usually means sheeting the entire roof before a single shingle is ordered.

That is a real and sometimes large cost, and whether a carrier covers it on a storm claim is a code question rather than a preference question. We cover that in the ordinance and law answer.

What Changes the Count

The gap between the size of a house and the size of a shingle order comes from three places. None of them is guesswork.

Pitch, which you cannot see from the ground

Roof area is not the same as the footprint of the house. A 7/12 pitch adds roughly 16% to the plan area, and a steeper roof adds more, which is why a satellite measurement and a tape measure across the driveway do not agree.

Number of facets, not size of roof

Two roofs of identical area can differ by ten squares in the order if one is a simple gable and the other has fifteen planes. Complexity drives waste far more than size does.

Starter, ridge cap, and hip cap

These are bought separately and they are not optional. Cap comes in bundles rated by linear feet rather than by square, so 224 feet of ridge and hip is its own calculation.

What Buying by the Truckload Changes

We order shingles in bulk, by the truckload, shipped direct to our yard rather than picked up from a supply house as jobs come up.

That earns better pricing, which gets passed on, and it means we can tell you what a square actually costs to stock rather than quoting from a price sheet. It also means material is on hand after a storm, when everyone else is waiting on a distributor.

Related Questions

How many nails will those bundles take?

Between 224 and 360 per square in standard application depending on the shingle profile, and half again as many on the enhanced pattern we install. How many nails per shingle does code require? has the full breakdown.

Why does my roofer’s square count differ from my satellite measurement?

Aerial reports measure the roof surface, but they can miss low slope sections, obstructions, and recent additions, and they do not price waste. A field measurement reconciles the two, which is why we do both.

Does the waste factor mean I pay for shingles I do not get?

You pay for the material the roof consumes, and offcuts at valleys and rakes are consumed. On a simple gable the factor is small, and on a fifteen facet roof it is the difference between finishing and running short.

Why is the order bigger than the square count?

A roof is cut to fit and the offcuts cannot be reused, and ordering short is worse than ordering long because a top-up delivery can arrive on a different colour code. Why does my roof estimate include a waste factor? covers both reasons.

See Also

The two answers that pair with this one are what holds those shingles down and how many fasteners each one takes, and who pays when the deck underneath has to be replaced to meet code.