A roof replacement estimate can look straightforward until old shingles are removed and hidden conditions appear. Before signing, ask the contractor to explain which costs are included, which are allowances, and how unexpected work will be priced.
Check the Roof Decking
Many preliminary estimates assume the underlying decking is sound. Water damage, rot, or weakened plywood may require replacement after the roof covering is removed. Ask the contractor to state the unit price for replacement decking and how much approval is required before additional work begins.
Review Underlayment and Ice Protection
Building requirements and roof design may call for specific underlayment, ice-and-water protection, ventilation, or other materials. Confirm the products and installation areas in the written scope instead of assuming they are included in the base bid.
Do Not Overlook Flashing
Flashing around walls, chimneys, valleys, skylights, and roof penetrations is essential to keeping water out. Ask whether existing flashing will be reused, repaired, or replaced. The estimate should identify flashing materials and any chimney or masonry sealing that is part of the project.
Clarify Tear-Off and Disposal
Confirm how many roofing layers are included in the tear-off price and whether additional layers, heavy materials, dumpster rental, hauling, and landfill fees cost extra. Also ask who obtains permits and whether permit fees and inspection costs are included.
Protect Yourself With a Detailed Contract
The contract should identify the roof system, materials, ventilation, flashing, cleanup, warranty terms, payment schedule, start expectations, and change-order process. Keep all approvals in writing, especially for decking repairs or other work discovered during demolition.
Comparing complete scopes of work—not just the bottom-line bid—makes roofing quotes easier to evaluate and reduces the chance of unexpected charges.