roofing contractor

What to Know Before Roof Installation

Highlights

  • Roofing estimates are calculated by the square rather than by square foot, which is why quotes can look confusing at first.
  • Licensing and insurance verification should happen before any other conversation with a contractor.
  • Written proposals need to specify materials, tear-off, decking allowances, and warranty terms separately.
  • Wind rating standards matter in Michigan, where seasonal storms test fastening and sealing.
  • Timeline, access, and property protection should be settled before installation day.
  • Giovanni’s Home Concepts provides detailed proposals and documented inspections for Macomb Township homeowners.

A roof installation is a large project compressed into a short window. Crews arrive early, work fast, and are frequently finished within a couple of days, which leaves little room to raise questions once the tear-off begins. Nearly everything worth deciding gets decided beforehand.

That front-loaded structure is why preparation matters more here than on longer projects. Homeowners who understand how estimates are built, what a complete proposal contains, and which standards apply to the materials going on their home are in a much stronger position than those working from a single number on a page.

What follows covers what to sort out before a roofing contractor sets a start date, from pricing units through property protection on installation day.

Understanding How Roofing Estimates Are Built

The first thing that confuses homeowners is the unit of measurement. According to HomeGuide, roofing contractors usually estimate project costs by the square, where 1 square equals 100 square feet.

That convention explains why a quote may reference 28 squares rather than 2,800 square feet, and why comparing two bids requires checking that both measured the same way. Roof area also exceeds the home’s footprint, since pitch increases the actual surface being covered. A steep roof over a 2,000 square foot house has considerably more area than a low-slope roof over the same floor plan.

Complexity drives cost alongside area. Valleys, hips, dormers, chimneys, skylights, and multiple roof planes all add labor and flashing work. Pitch affects it further, since steeper roofs require additional safety measures and slow the pace of work.

Ask any roofing contractor how many squares they measured and how they arrived at that figure. Two bids differing substantially in square count usually means one of them measured incorrectly, and that is worth resolving before price enters the conversation.

Verifying Licensing and Insurance First

In Michigan, residential roofing work falls under state licensing requirements administered through the Department of Licensing and Regulatory Affairs, and the threshold for requiring a license is low enough that essentially any full roof project qualifies. Verify the license number, confirm it is active, and check that the classification covers roofing specifically.

Insurance verification is separate and equally important. Request certificates for both general liability and workers’ compensation directly from the insurer rather than accepting a copy from the contractor. Without workers compensation coverage in place, a homeowner can face exposure if someone is injured on the property.

According to the Federal Trade Commission, homeowners should consider only contractors who are licensed and insured, and should watch for specific warning signs including contractors who claim to have materials left over from a previous job, who pressure for an immediate decision, who ask for full payment up front or accept only cash, or who ask the homeowner to obtain the required building permits.

That last item deserves emphasis. A roofing contractor pulling permits under their own license carries responsibility for code compliance. One asking the homeowner to pull permits is shifting that responsibility, which is rarely in the homeowner’s interest.

What Should a Complete Proposal Include?

A thorough written proposal answers questions before they become disputes.

Materials should be specified by manufacturer and product line rather than described generically. Shingle type, underlayment, ice and water shield placement, ridge vent, and flashing materials all belong in writing.

Tear-off treatment needs to be explicit. Complete removal of existing layers allows inspection of the decking underneath, which is impossible when new material is installed over old. The proposal should also state the per-sheet cost for replacing damaged decking, since that condition is unknown until the old roof comes off. Without a stated rate, a homeowner is negotiating mid-project.

Ventilation work should appear as a line item. Intake and exhaust balance affects how long the new roof lasts, and correcting it during installation costs far less than addressing it later.

Warranty terms come in two parts that are easy to conflate. The manufacturer warranty covers material defects. The workmanship warranty covers installation, and its length and terms vary widely between contractors. Both should be stated separately with their durations.

Knowing Which Standards Apply to Your Materials

Material specifications carry more weight than product names suggest, particularly for wind performance in a state with real seasonal weather.

According to the Federal Emergency Management Agency, for asphalt shingle roofs, FEMA recommends replacing damaged or destroyed shingles with new shingles designed to withstand wind speeds of up to 116 miles per hour, and homeowners should verify that replacement shingle packages are labeled to indicate compliance with ASTM D7158 for wind resistance.

Ask your roofing contractor which wind rating the proposed shingle carries and confirm the labeling. Impact resistance is worth discussing as well, since Class 4 rated products withstand hail better and often qualify for insurance premium discounts.

Michigan’s freeze-thaw cycling makes ice and water shield placement particularly important at eaves and valleys, and that detail should be specified rather than assumed.

Preparing for Installation Day

A few practical arrangements make the process considerably smoother.

Confirm the expected timeline and what happens if weather interrupts the work. Ask how the crew protects landscaping, siding, windows, and air conditioning units during tear-off, and how debris and nails are cleaned up daily rather than only at the end.

Move vehicles out of the driveway, plan for noise and vibration inside the house, and secure or remove items hanging on walls and stored in the attic, since debris falls during tear-off. Arrange for pets to be elsewhere if possible.

Confirm dumpster placement and material delivery staging in advance, along with where the crew will access power and water if needed.

Start Your Roof Project With Confidence

The decisions that determine how a roof installation goes are made before the first shingle comes off. Understanding how the estimate was measured, verifying credentials, requiring a proposal that specifies materials and contingencies, and confirming wind rating and ventilation all take a single conversation, and they prevent nearly every problem homeowners report afterward.

Giovanni’s Home Concepts works with Macomb Township homeowners on exactly that basis, providing documented inspections, itemized proposals covering materials and warranty terms, and clear communication about timeline and property protection. Reach out to schedule an inspection and start your project with a plan you can actually evaluate.

Frequently Asked Questions

Estimates are built by the square, with one square equaling 100 square feet of roof area. Pitch, complexity, valleys, penetrations, and material selection all affect the total beyond raw area.

Materials specified by manufacturer and product line, tear-off scope, a stated per-sheet rate for decking replacement, underlayment and flashing details, ventilation work, timeline, payment schedule, and both manufacturer and workmanship warranties with their terms.

We perform a documented inspection, provide an itemized written proposal covering materials, contingencies, and warranty terms, confirm permitting and insurance, and walk homeowners through the timeline and property protection before scheduling.