See the steps below to plan the right work for your roof.
Build one plan with separate choices
Set the base job you want each firm to price. That may be the main house roof with a specific type of covering. Ask firms to list other choices apart from the base. One price may include a garage that the other leaves out. Those totals describe different jobs. Mark that gap before you compare them.
Use one page for the base work and another for options. Keep a note of why you might want each option. A color choice, a wider work area, and a change in roof type are not the same sort of decision. This split keeps the cost talk on track. You can see which job each firm was asked to price.
Ask what area was measured
GAF's cost page notes that roof surface area affects the price. Roof area is not the same as the living space inside a house. Ask for the roof measurements used in the bid. Ask which parts are left out, such as a porch or a separate garage. Leave roof measuring to the roofer.
Do two measurements differ? Ask what each firm counted. Was a small slope missed? Is one number the roof surface and another the material order? Have both included the same buildings? Do not pick the area that makes the rate look low. The goal is a clear view of the work area. You also need to know how each number was found.
Footprint is not roof area
- 1House footprint
Floor space does not measure sloped roof surfaces.
- 2Roof planes
Pitch, separate slopes, and waste affect measured material quantities.
- 3Detached roof
List a garage or other roof separately if it is included.
Keep units next to quantities
Roof bids may use more than one unit. GAF explains that a roofing square means one hundred square feet of roof surface. Other items may be listed by length, count, or piece. Write the unit beside every quantity. A bare number has little meaning when you cannot tell what was measured or bought.
Ask the firm to label the measured area and any extra material it plans to order. Ask what the extra amount covers. Do not add a default waste rate from this page. It has none. The firm should explain its own basis. Keep the quantity from each bid as written. Note why the firm says it differs.
Describe the roof that is coming off
Ask what the firm plans to remove before it installs the new work. Does the price assume a known number of old layers? How was that checked? Are there parts that will stay? The old layers may not all be known. Ask the firm how it plans to deal with that gap. Do not mark a guess as a measured fact.
List the old-roof work apart from the new-roof work. Do this even if the bid bundles them. Ask how removed material will leave the property. Does the plan call for a second layer? Ask why. Check the local rules for that scope. Use the official answer for that job.
Tell Us About Your Roof
Tell us what needs attention.
Make the roof deck question visible
The roof deck is the surface below the roof covering. Ask what the firm can assess before work starts and what may be hidden. Does the price include deck work? Ask what amount and type. If more is needed, ask how that need will be documented. Keep that answer with the part of the bid that sets added charges.
Avoid filling your comparison with an assumed amount of bad decking. Ask how added work will be measured. Is the price by sheet, area, or another unit? Does that rate cover removal and labor? Who must approve the quantity? These questions help you plan for an open cost. They do not show what is under the old roof.
Compare a system, not a color sample
GAF's homeowner material explains that a roof includes more than the visible shingles. Ask each firm for the list of parts in its proposed system. The list may include layers below the covering, edge parts, flashing, and vents. Ask which are new and which are to remain. Request product names so the offer is clear.
Use a sample to choose a look, then return to the written list to compare the work. Two roofs with the same color can have different scopes. If a firm changes a product, ask for a revised list and an explanation. Ask the firm to confirm the full list in writing. Then use that same list when you review the price.
Give roof joints their own line
Ask how the scope deals with places where the roof meets walls, chimneys, vents, or other parts. The words new roof can leave these details unclear. Ask the firm to name what will be removed, rebuilt, or left in place. List work by other trades on its own line. State who will arrange it.
For a closer look at the questions, read the flashing page. Use it to prepare a list, not to specify the repair detail yourself. A firm should explain why its detail fits the actual roof. Do the firms suggest different plans? Ask each to show its plan on a sketch or photo.
Ask about vents before choosing add-ons
A bid may list work related to roof or attic vents. Ask what the roofer checked. What problem would the new work address? Ask whether the proposal adds parts, removes parts, or leaves the setup as it is. Do not accept a larger count of vents as proof that one scope is better.
Ask for a plain account of the plan. List work that falls outside the roof job. If another trade needs to assess something, put that task on the list. Ask a qualified roofer to size and plan the vents. That task needs facts about the house.
Tell us where the leak, wear, or damage needs attention.
Check site work and fees
GAF's cost guidance includes labor, permit fees, and disposal among items that can enter a roof estimate. Find those items in each bid. A lump sum can be clear. It needs to state what it includes. A long list can leave key work out. The format alone does not settle the quality of the offer.
Ask who will verify local requirements and where a waste container would go. The permit page helps you find the right starting office. Also ask about site protection, access, and cleanup. Write down any task that falls to you, but do not take on roof access or trade work to make a price appear lower.
Build a scope bridge between bids
A scope bridge is a simple list of differences. Put each base bid beside it. For each gap, ask for the price to add the same work. Or ask why the work should differ. Use only the firm's confirmed numbers. Never invent an adjustment so two totals look comparable. If the work should differ, note why.
The bridge can also show what remains unknown. For example, one firm may not yet have priced a detached roof. Mark that item open until it responds. Do not count the blank as zero. You can compare before every answer arrives. Just show what is missing. Do not rank a partly priced job as the winner.
| Scope item | Bid A | Bid B | Gap to resolve |
|---|---|---|---|
| Roof areas | Enter written scope. | Enter written scope. | Same buildings and slopes? |
| Removal and new parts | Enter included work. | Enter included work. | Any part kept by just one firm? |
| Deck work | Enter stated method. | Enter stated method. | Same proof and pricing basis? |
| Optional and unknown work | Keep separate. | Keep separate. | Any blank treated as zero? |
Align bids before totals
- 1Roof areas
Match house, porch, and garage scope.
- 2Layers
Compare removal, underlay, cover, edges, and joints.
- 3Deck work
Keep hidden-work terms and units visible.
- 4Missing scope
Ask for written amounts; a blank is not zero.
Keep extras out of the base total
Ask if other colors, new products, or added roof areas cost more. Keep each choice on its own row. Record whether you selected it. Is a discount tied to an extra choice? Ask for the full terms and new total. A promotion should not obscure the scope that you are trying to compare.
Do not enter a hoped-for rebate, insurance payment, or future saving in this sheet. It compares what the firms would charge for specified work. If you need to understand a separate payment source, check that with the proper source. The insurance question page keeps those questions apart from the contract price.
Read the timing and change process
Ask when a price expires and what must happen before work starts. Who will tell you if a product or date changes? How will a new date be confirmed? Ask how the open roof will be protected during the work, but leave the method to the roofer. Keep the site plan separate from any promise about an exact finish day.
Ask who must approve added work. What record will show the need? How will the price be agreed? Make room in your file for both the original scope and later changes. If you get a new bid, ask which old one it replaces. That avoids adding a new total to an old total by mistake.
Compare warranties with the same care
Request the full warranty terms that apply to the quoted work. Ask who makes each promise. What does it cover? What steps put it in effect? GAF notes that warranty options can depend on the products and the installing contractor. Do not assume every offer with the same shingle name includes the same promise.
A long warranty term does not answer every cost question. Ask about exclusions, duties, and how you would report an issue. Keep product and workmanship terms apart if they have different providers. Then look at any fee shown for an added option. Read the terms first. Then decide how much the option matters to you.
Finish with a review you can explain
Read your sheet aloud in plain words: this price covers these areas, removes these parts, installs these products, and leaves these questions open. If you get stuck, turn that point into a question for the firm. You should be able to explain your choice. A score or green badge on the cheapest price does not do that.
Before you sign, use the roofing company page for identity and contract checks. If the need for full replacement is still in doubt, go back to the repair or replace page. A clear price describes the job. You still need facts that show it is the right job.
What affects roof replacement cost in Peoria?: the key steps
Read the full transcript
What affects roof replacement cost in Peoria?.
For a roof replacement bid, list each included roof area.
Check porches and garages before you compare whole-job totals.
In roof bids, a square means one hundred square feet.
Ask which number is measured area and which is material.
A replacement scope should explain removal and new parts.
Ask about the deck and joints, not just shingle color.
When roof bids differ, ask each firm to price the missing scope.
Never treat a blank amount as zero.
For a new roof, check who provides each warranty and what starts it.
A long term alone is not enough.
Your questions, answered.
Can I use my house floor area to price a roof?
Do not treat indoor floor area as measured roof area. Ask the roofer for the roof measurement and the areas included. This page has no rate that turns square feet of living space into a valid replacement estimate.
What does a roofing square mean?
It means one hundred square feet of roof surface. Keep the unit beside the quantity in your notes. Also ask whether a bid number is measured area or an order quantity. Those two numbers may serve different purposes.
Why is deck work often a separate question?
Ask what could be seen before the old work is removed. The firm may not yet know the full scope below it. Request a clear process for proof, quantity, price, and approval if added work is needed. Do not assume that work is either free or certain.
Can the comparison tool choose the best bid?
No. It can add the verified amounts you enter and show scope gaps. It cannot judge roof condition, workmanship, or legal terms. Its fields start blank, stay on your device, and are not saved. Printing a copy is your choice.
Where is the Peoria replacement price range?
No verified local price range is supplied here. A national average or a bill from another home is not your roof estimate. Use current written offers for the same project, and keep unresolved costs visible until you receive an answer.