10 Minute Bids
San Juan Islands

The local numbers behind a shingle roofing bid.

What the San Juan Islands builds to, and what it means for the takeoff.

San Juan Islands: the numbers a shingle roofing bid depends on
WhereSnow loadDesign wind speed
San Juan County (unincorporated: Orcas / Eastsound, Lopez, San Juan outside Friday Harbor, other islands)25 psf (as printed)110 mph
Friday Harbor25 psf (as printed)110 mph
  • Snow load: 25 psf (as printed) (San Juan County (unincorporated: Orcas / Eastsound, Lopez, San Juan outside Friday Harbor, other islands)). The trusses, rafters and roof sheathing on your plans are designed for the snow load; if the truss notes show a different number, ask before you bid.
  • Design wind speed: 110 mph (San Juan County (unincorporated: Orcas / Eastsound, Lopez, San Juan outside Friday Harbor, other islands)). Shingles go on with the maker's nailing for the wind speed, and high-wind nailing changes the nail count.

Sources: San Juan County (unincorporated: Orcas / Eastsound, Lopez, San Juan outside Friday Harbor, other islands): San Juan County Community Development · Friday Harbor: Town of Friday Harbor. Read 2026-09-28. Every number is as the jurisdiction publishes it (its design criteria for houses, IRC Table R301.2(1)); a dash means it isn't published. Your lot can differ with elevation and exposure, so confirm it with the building department before you order.

What you get

Squares, edges and flashing, counted.

Your takeoff is built from the model, not a scale ruler. Here's what it covers, with the numbers from our example house.

  • Squares by plane and pitch, with waste figured from the cuts
  • Starter along every eave, hip and ridge cap
  • Valleys, step flashing and headwall flashing
  • Underlayment, with ice and water shield on low slopes
  • A supplier order sheet to save as a PDF and email to your supplier. See a sample

See the full shingle roofing takeoff on an example house

Same plans, same 3D model

Every trade in the San Juan Islands.

Add another trade to the same order: each one after the first in the same order is half price. All of San Juan Islands · Every area

Questions

Shingle roofing takeoffs in San Juan Islands

Do you do shingle roofing takeoffs for houses in Friday Harbor?

Yes. Upload the plan set for a house anywhere in the San Juan Islands (Friday Harbor, Eastsound, Lopez Island, Deer Harbor and Orcas Island), or anywhere else. Nothing has to be built yet: we measure the house on the plans.

What design numbers apply in Friday Harbor?

Friday Harbor publishes snow load: 25 psf (as printed); design wind speed: 110 mph. The design on your plans should match them, and the takeoff follows your plans. Elevation and exposure can change them for your lot, so confirm with the building department.

Does a takeoff cost more in San Juan Islands?

No. The price is the same everywhere, and you see it before you pay. The 3D model is included, and each trade after the first in the same order is half price.

Is this an exact price?

No. It's an estimate built from your plans. Plans don't show the roof as it really is: rotten decking or old layers under a re-roof, or crickets and saddles that aren't drawn. Anything built differently from the drawings won't be in the bid. We recommend a site visit to confirm measurements and conditions before you sign a contract or order materials.