Buying Your Own Shingles Changes the Roofing Bill

You have a roof replacement estimate and a separate price for buying the shingles yourself. The supplier's number looks smaller than the material amount you expected. Before you place the order, get one fact settled: exactly how much will the roofer subtract if you supply those shingles? Your purchase saves money only if the reduction in the installed price exceeds what you spend taking over that part of the job.

For a St. Louis homeowner, the useful comparison is between two written prices for the same finished roof. One includes contractor-supplied shingles. The other identifies the shingles you will supply and everything the contractor will still provide. A receipt for bundles cannot make that comparison by itself.

Cost and estimates

Start by asking whether the contractor accepts homeowner-supplied materials. Do this before ordering, paying a delivery charge, or arranging a place to store them. A contractor may decline that arrangement or agree only after reviewing the exact product and the purchasing responsibilities. Do not assume a roofing estimate is an offer to install whatever materials you later buy.

If the contractor agrees, request a revised installed price. Do not subtract your supplier's quote from the original roofing estimate yourself. The contractor's price may include ordering, delivery coordination, checking the shipment, handling shortages, and returning eligible excess material. Ask which of those services remain in the revised price and which become your responsibility.

The revised proposal should identify the exact shingle manufacturer, product, color, and quantity you are supplying. It should also identify who supplies the other roof materials. Buying field shingles does not necessarily buy the starter shingles, ridge caps, underlayment, flashing, fasteners, and ventilation components specified for the job. Those items need an assigned buyer even if they do not appear on your supplier's first quote.

Ask the roofer to review the supplier's proposed order before you authorize payment. That review should establish whether the order fits the written roofing scope. It should not be treated as an agreement that the homeowner's quantity calculation is sufficient or that every accessory on the roof will be reused.

What it costs

Use the reduction in the contractor's price as your starting number. Then subtract your complete purchasing cost. Include the shingles, applicable charges shown by the supplier, delivery, and any separate handling you have agreed to pay. Compare totals prepared on the same basis. A supplier quote that leaves charges for checkout cannot be compared directly with a delivered total.

Here is an illustration, not a St. Louis market estimate. Suppose the contractor's revised proposal is $4,000 lower when you supply the field shingles. Your supplier's total is $3,650, including delivery and the charges listed on the order. The apparent saving is $350. That is the amount available to cover any additional expenses you accept under the arrangement. It is not a $4,000 saving.

Now consider a shortage. Who purchases the missing bundles, collects them, and pays for another delivery if collection is impractical? If the crew must return another day, does the agreement allow an additional charge? You do not need to assume those problems will occur. You need to know whether their cost belongs to you before deciding that the $350 difference is worthwhile.

Ask about excess material at the same time. A supplier may have return conditions involving unopened packaging, product availability, a return deadline, or a restocking charge. Get the conditions for your actual order. Do not count on receiving a full refund for every unused bundle when calculating your expected saving.

A supplier's delivery date becomes part of your roofing schedule

Ordering the shingles yourself creates a separate commitment alongside the roofing contract. The supplier promises a delivery under one set of terms. The roofer schedules labor under another. Put someone in charge of confirming that the required materials are present and acceptable before the roof is opened.

That coordination matters during a St. Louis spring, when rain can move an outdoor work schedule. Ask what happens if the roof date changes after your delivery is booked. Can the supplier hold the order? Does rescheduling cost anything? If the materials have already arrived, who is responsible for keeping them stored according to the manufacturer's instructions until installation?

Also ask what the quoted delivery service actually includes. Delivery to an accessible location on the property and placement where the roofing crew needs the materials are separate tasks. Have the contractor identify any additional handling charge in the revised proposal. Otherwise, you may discover that part of the apparent material saving pays for moving the order a second time.

Decide who deals with a damaged or incorrect shipment

A delivery can contain the wrong color, the wrong product, missing items, or damaged packaging. The agreement should say who checks the shipment, when that check occurs, and who contacts the supplier if something needs correcting. Keep the order confirmation and delivery paperwork available to the person doing that check.

If you are the purchaser, ask the supplier what documentation it requires for a shortage or damage report. Then make sure the contractor knows the reporting procedure you have accepted. An arrangement that depends on the roofer noticing a problem immediately needs the roofer's agreement, especially if delivery occurs days before the scheduled work.

Do not let an unresolved shipment problem turn into an informal product change. If the supplier proposes another shingle because the ordered product is unavailable, have the contractor review it before accepting the substitution. The revised order and roofing scope need to describe the same materials.

Keep installation responsibility clear

Ask the contractor to explain in writing how supplying your own shingles affects its workmanship coverage. Ask separately how a product concern would be documented and submitted to the manufacturer. These are different questions, and neither should be answered with a general statement that the roof is covered.

Keep the supplier invoice, product identification, and delivery records with the roofing contract. The paperwork should establish what you bought and what the contractor installed. Do not assume buying directly either removes or preserves every warranty benefit. Ask for the applicable written terms for the product and installation being proposed.

What to ask

Before purchasing, send the roofer these questions together so the answers can become part of one revised proposal:

• What is your installed price if I supply the exact field shingles listed here?
• Which materials and purchasing services remain included in your price?
• Who approves the order quantity and checks the delivery?
• Who pays for shortages, additional handling, or a return visit caused by missing material?
• What written coverage applies to your installation under this arrangement?

For a roof in St. Louis or the greater St. Louis area, call Keys Roofing at (314) 220-2333 to discuss an estimate. If you are considering buying shingles yourself, raise that before placing the order and ask whether Keys will quote the arrangement. Have the supplier's itemized offer available, including its delivery and return terms, so the conversation can address the dollars you would actually spend.