A Minimum Charge Can Make a Small Roof Cost More

A roofer who prices a small roof will often quote a number that looks high when you divide it by the area. The usual reason is a minimum job charge, a floor the company sets so a crew does not lose money on a few squares of shingle and a half day of setup. A detached garage, a front porch, a dormer or a small addition can fall under that floor even when the work itself is modest. Before you set that total beside a larger bid, find out whether the floor exists, how high it sits, and what it is supposed to pay for.

Why a small roof has a floor

Every roof job carries fixed work that does not shrink with the size of the roof. A crew has to get materials to the site, set up protection for the lawn and driveway, pull a permit where one is required, run a magnetic sweep at the end, and drive back to the yard. On a full house, those costs spread across many squares. On a porch roof of about three squares, the same steps land on very little shingle, so the price per square has to rise to cover them.

A minimum charge puts that fixed cost into one visible line. Some roofers call it a minimum job charge, some call it a service minimum, and some fold it into a higher unit price so it never appears on its own. The label matters less than the effect. However it is written, the total for a small roof will not drop below the floor, no matter how little material the crew uses.

What the floor is supposed to cover

A fair minimum should match work that really happens on a small job. Ask the roofer to list what sits inside it. A useful answer names the mobilization, the tear-off and disposal for the section being replaced, the underlayment and drip edge along the edges being redone, the flashing where the new roof meets an existing wall, and the cleanup. If the answer is only that the minimum is company policy, you have learned the number but not the reason for it.

Check whether the minimum covers labor only or labor and materials. Some roofers set the floor on the whole invoice. Others set it on labor, then price shingles by the square on top. Those two arrangements can produce very different totals for the same ten squares, and a side by side comparison will not reveal the difference unless both quotes are read with that question in mind.

A worked example with made-up numbers

Suppose a garage roof measures four squares. Roofer A quotes a minimum of 1,200 dollars and then a unit price for shingles and labor that comes to 700 dollars for the four squares. Roofer B has no stated minimum and quotes 1,050 dollars for the same four squares. At a glance Roofer B looks cheaper, but Roofer A's 1,200 dollars may already cover the permit, the sweep and the trip, while Roofer B's 1,050 dollars may leave those items off the page and add them later. Neither number means much until both proposals list what each total includes.

Now suppose the same two roofers each quote the main house, which is thirty squares. Roofer A's unit price applies to all thirty squares with no minimum needed, and the per square figure on the main roof is lower than the garage figure. That gap is the minimum at work. A homeowner who only looks at per square rates will read the garage number as a sign the company is expensive, when the real difference is fixed cost spread over fewer squares.

Where the minimum hides in a bid

Small roof bids show the minimum in different places. Some put it on a separate line called mobilization, small job adjustment or service charge. Others build it into the unit price for the whole job. When it is built in, the per square number looks higher than the same roofer's rate on a large house. The better test is the total divided by the area actually replaced, then compared with that company's price on a larger roof.

Here is a simple check. Ask each roofer for two figures: the price for the small section by itself, and the price for that section if it were done on the same day as the main roof. The first figure tells you what the small job costs alone. The second tells you how much of the main job's cost the crew absorbs, and whether combining the work saves money. If the second figure is not much lower than the first, the minimum is doing most of the work in the price.

Small roofs that cross the line

Several common St. Louis projects tend to fall under a minimum even when the crew is on site for only a short time. A detached garage is the most common example. A covered front porch, a back stoop, a bay window cap or a small shed can also come in under the floor. Some St. Louis County and municipal jurisdictions require a permit for these structures, and the permit fee does not shrink because the roof is small. The minimum may be partly a way of covering that fixed cost, so ask whether the permit fee sits inside the floor or outside it.

Freeze and thaw cycles add another pressure. A small roof replaced in late fall may need a second visit if a cold snap stops the sealing or interrupts the work. If the bid includes a minimum that assumes one visit, ask what happens if the crew has to come back, and whether that return trip is billed separately or absorbed into the floor. Hail season adds a similar question in spring, when a small roof may be pushed back behind larger jobs.

Questions to put to the roofer

• Is there a minimum job charge, and what is the dollar amount?
• Is the minimum a separate line on the proposal, or is it built into the unit price?
• Does the minimum cover labor only, or labor and materials?
• What work is included under the minimum, such as tear-off, disposal, flashing, cleanup and the magnetic sweep?
• If the small section were done on the same day as the main roof, what would the price be?
• Who pulls the permit for a small structure, and is the permit fee inside the minimum?
• If the crew has to return because of weather or a failed inspection, is that trip billed?

Write each answer next to the figure it explains. A roofer who can answer every one of these has made the small job easy to compare. A roofer who cannot has left you with a number you cannot check.

Putting the minimum in writing

Ask any roofer, Keys Roofing included, to put the minimum in writing with the dollar amount, the work it covers and the trip terms. A written scope with photos and measurements should show each line that makes up a small roof total, so that the floor is not a surprise on the final invoice. If a roofer will not put the minimum on paper, compare the totals as they stand and treat the missing line as an open question. Keys Roofing can be reached at (314) 220-2333 to talk through how a small roof is priced before anything is signed.