Define the product and installation scope
Ask whether the bid specifies shakes or shingles, the product grade and treatment, and the proposed underlayment, spacing, flashing, and fastening. Request the manufacturer installation instructions and written maintenance requirements.
Check the property before changing materials
For an Irvington or Eastmoreland property, confirm the designation and proposed work with the city before assuming that a particular material or review process applies. The historic roofing guide explains what information to gather.
Include maintenance in the decision
Discuss inspection, debris removal, drainage, and treatment compatibility with the installer. Use the roof maintenance guide to organize a schedule, then adjust it to the product and roof condition. Avoid choosing a cleaning method solely on a promise to make the roof look new.
Compare alternatives on equal terms
If you are comparing cedar with metal roofing, use the same measurements and include any changes to decking and flashing. For a Lake Oswego property, check any applicable private approvals separately from city requirements.
Choose a contractor for the scope
Before signing, check the Oregon CCB license and compare the written scope, payment schedule, and warranty. You can request a roofing referral through this site; confirm the contractor’s credentials and availability before hiring.