What Should Be Included in a Roof Replacement Estimate?
A roof replacement estimate is more than a number at the bottom. It is the first draft of your contract. Here is how to read one, what the wording really means and what should never be left out.
Schedule Your Roofing Inspection Today
Fill out the information below and we’ll reach out to complete your estimate as soon as possible!
An estimate is a promise in writing
Two estimates with similar totals can describe very different roofs. One may include new flashing, a leak barrier in the valleys and ventilation changes. The other may reuse old flashing and say nothing about vents. You only find out which is which by reading the details.
A good estimate does three jobs. It tells you exactly what will be done, it shows you what could change the price, and it becomes the reference if the finished job does not match what you were told. If you are comparing estimates in Houston, our Houston roof replacement estimate page lists the core items every one should have. This guide goes further into how to read them.
Read every estimate with the same questions in mind: what exactly will be done, what could change the number, and what happens if something goes wrong. If an estimate cannot answer those three, it is a price, not an estimate.
The parts of an estimate and what to look for
Measurements
Roofs are measured in squares, and one square covers 10 by 10 feet. The estimate should state the roof size and how it was measured.
Scope of work
Look for the words tear-off or remove existing roof. Overlay means new shingles over old ones, which is a different job.
Materials by name
Shingles, underlayment, leak barrier, starter and ridge should be listed by brand and product line, not just shingles.
Unit prices and allowances
Decking replacement is usually priced per sheet or per square foot, since the amount is unknown until tear-off.
Exclusions
What is not included matters as much as what is: gutters, skylights, fascia repair, solar, interior repairs.
Terms
Payment schedule, start window, cleanup, warranty information and how changes are approved.
Wording that deserves a second look
Some phrases sound complete but leave room for surprises. Replace as needed with no unit price means you will not know the cost until it is spent. Flashing as required can mean new flashing or a coat of sealant on the old. Code upgrades as needed is fair, but ask which items it usually involves on a house like yours.
Watch for missing ventilation. A replacement is the best time to fix an attic that cannot breathe, and an estimate that does not mention vents at all may be skipping it. Our roof ventilation page explains what a balanced system includes.
Watch for warranty language too. Manufacturer warranties cover the products and often depend on installation standards; a workmanship warranty, if offered, comes from the contractor. Ask what each covers and get the details in writing. Do not accept a warranty described only verbally.
Change orders are the last piece. If something changes during the job, such as extra decking or a vent you decide to add, the change and its cost should be approved in writing before the work is done. Ask how the contractor handles that and who on their side can approve it. A clear change process protects both sides.
A 15-minute review before you sign
Check the measurements
Confirm the roof size is stated and roughly matches between estimates. Big differences deserve a question.
Read the scope line by line
Tear-off, deck inspection, underlayment, leak barrier, drip edge, flashing, pipe boots, vents, ridge, cleanup.
Find the decking price
Make sure there is a clear unit price for replacement wood, and ask how you will be told if it is needed.
Read the exclusions
Make a list of what is not covered and decide whether you need any of it.
Read the money terms
When each payment is due and what triggers it. Large payments before materials arrive are a red flag.
Check the names and signatures
Company name, address, phone and the person responsible for your job should all be on the paper.
If a storm or insurance is involved
When you file a claim, there may be two documents: your contractor's estimate and the insurer's estimate of the damage. They are not the same thing and may not match line by line. Coverage depends on your policy and your insurer's decision. GemSco inspects, documents the damage with photos and gives you a written estimate you can share with your insurance company.
If your contractor's estimate and the insurer's estimate differ, ask your contractor to walk you through the differences item by item. Some are about scope, like flashing or ventilation; others are about measurements. The final decision on what the policy covers belongs to your insurance company.
Be wary of any estimate or contract that promises the roof will cost you nothing, or offers to cover your deductible. Texas law prohibits contractors from waiving or paying it. Our roof insurance claims page explains the process, and our guide on questions to ask before hiring a roofing contractor helps you test the company behind the paper.
Red flags in a roof estimate
A single total with no breakdown of materials or work.
No mention of tear-off, or overlay without explaining why.
No unit price for decking replacement.
Materials listed generically, without brand or product line.
Pressure to sign the same day, or a discount that expires tonight.
No company address, phone number or written terms.
Totals that change between the verbal quote and the written estimate without explanation.
Get an estimate you can read
If you have an estimate in hand and are not sure how to read it, compare it against this guide line by line. Missing items are not always a bad sign, but every one is a question to ask before you sign. A contractor who answers those questions clearly is showing you how the rest of the job will go.
At GemSco every estimate is free, in writing and based on an inspection with photos. We explain each line, and financing is available if you need it. GemSco is family owned, fully licensed and insured, and an elite contractor for Owens Corning and GAF across Houston, DFW, Austin and San Antonio. Start on our roof replacement page or call (844) 980-5506.
Frequently Asked Questions
What is a roofing square?
A square is the unit roofers use to measure roofs. One square equals 10 by 10 feet of roof surface. Estimates often list the number of squares plus a waste factor for cuts at hips, valleys and edges. Comparing the square count between estimates is a quick way to check that everyone measured the same roof.
Why does my estimate say decking is extra?
Because no one can see the deck until the old roof is off. A fair estimate gives a unit price for replacement wood, usually per sheet, so you know the cost if rot is found. Ask how you will be notified and to see photos of any decking replaced.
Should two roof estimates be the same?
Not necessarily. Different materials, scope and ventilation plans change the total. What should match is the roof size and the basic scope. Line up the estimates item by item so you compare the same work, then ask each contractor to explain the differences.
Is a verbal estimate enough for a roof replacement?
No. A roof replacement is a large project, and only a written estimate shows the scope, materials, terms and exclusions. It also gives you something specific to refer to if the finished job does not match what was promised. Ask for it in writing before you decide.
We’re Here to Help!
GemSco Roofing & Solar serves Houston, DFW, Austin, San Antonio and surrounding areas. We’re family owned and fully licensed and insured.