Roofing · Commercial · Residential

Roofing subcontractors, and the work they bid

Roofing is bid on warranty as much as on price: two numbers that look ten percent apart can be a manufacturer-backed NDL warranty against a contractor's own two-year workmanship letter, which is not the same product. Post the scope and get bids that state the warranty, or find open roofing scopes to price in your area.

Post roofing work Bid on roofing work

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What gets bid

Scopes roofing bids usually cover

A posted scope can be any part of this. The more of it the drawings settle up front, the closer the bids come back to each other.

Tear-off, disposal and deck inspection
Deck repair and replacement
Insulation, cover board and vapour barrier
Single-ply membrane — TPO, EPDM, PVC
Modified bitumen, shingle and standing-seam metal
Flashing, curbs, penetrations, gutters and edge metal

Hiring roofing crews

What to check before you award

Manufacturer approval, not just experience: A no-dollar-limit manufacturer warranty is only issued to an approved applicator. If the spec calls for an NDL warranty, a contractor who isn't approved by that manufacturer cannot deliver it no matter how well they install it.
Two warranties, two different terms: The manufacturer warrants the material; the contractor warrants the workmanship. Ask for both terms in writing — a twenty-year material warranty behind a one-year workmanship warranty is a much weaker package than it first sounds.
A unit price for what's under the old roof: Nobody knows the condition of the deck until the tear-off. A bid with a stated per-square-foot rate for deck replacement is a bid that has priced the unknown honestly rather than absorbing it into a change order later.

Post roofing work

Bidding roofing work

What makes a bid win this trade

Lead with the warranty: State the manufacturer, the warranty type and the term, plus your own workmanship term. It is the first thing a GC compares once the numbers are close, and it's frequently missing from the competition's bid.
Carry a rot and deck-repair unit price: Pricing the unforeseen up front removes the GC's biggest fear about awarding a re-roof, and it protects your margin better than a lump sum guess does.
Say how you handle weather: Tarping, nightly tie-offs and how much roof you open at once. On an occupied building this is what the owner will actually ask about.

Find roofing work

Where roofing scopes show up

Commercial re-roofs and roof-oversNew-construction low-slope systemsStorm and leak repairResidential steep-slope replacement

Whichever side you’re on, the record stays on the job — scope, bids, award, progress, invoices and the review at the end. See how a job runs, or what the plans cost.

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