Flat Roof Installation

What This Service Involves

A flat roof in Western Washington lives or dies by its slope and drainage, so our crews build in tapered insulation to create positive fall toward interior drains and scuppers. We evaluate the existing deck for soft spots and dry rot before committing to a membrane, because a spongy substrate under a new roof guarantees premature failure. Every assembly is detailed for our wet climate with primed seams, reinforced corners, and generous flashing heights at parapets and curbs. The result is a low-slope system that stays watertight through months of steady drizzle rather than dramatic downpours.

Benefits

Tapered insulation engineered to eliminate ponding on nearly level decks; Full deck inspection catches hidden rot before it is buried; Detailing sized for sustained PNW rainfall, not just cloudbursts; Compatible membrane options matched to your building and budget; Warranty-backed workmanship documented with photos

Our Process

1) Inspect the deck and measure existing slope to plan drainage; 2) Design a tapered insulation layout that directs water to drains; 3) Install cover board and the specified membrane with sealed seams; 4) Detail all penetrations, edges, and parapets, then flood-test critical areas

What Affects the Cost

Roof square footage and the number of penetrations to flash; Amount of tapered insulation needed to fix inadequate slope; Deck repairs uncovered once the old roof is removed; Membrane type selected, from economical to premium reflective; Access, height, and parapet complexity on commercial buildings

Best Time of Year

Late spring through early fall offers the stretch of dry weather these adhered systems need to cure properly before the rains return.