Commercial roofing · Tri-Cities, WA
Low slope roofing for pitches where water lingers
Systems made for minimal pitch, where the roof has to handle water that does not run off quickly.
Chapter 01
Why a low pitch is its own problem
Shingles are designed to shed water fast, which is why they belong on a steep roof. On a low slope, water moves slowly, sits in low spots and finds every seam and penetration. That is why low-slope roofs are built as continuous waterproof membranes rather than layers of overlapping pieces, and why drainage is part of the roof design and not an afterthought.
Eastern Washington adds its own pressures. Summer sun bakes the surface, and winter snow can sit for days, melt, pool and refreeze. Water that freezes inside a seam or a crack expands and widens it, so a small defect in November can be a real leak by February.
Aerial view of a large complex roof with an A&A pickup in the drive
Systems for minimal pitch
A&A works with the systems that suit low slope: built-up roofing with multiple layers for added durability, modified bitumen with its polymer-reinforced asphalt sheets, and single-ply membranes including TPO, EPDM and PVC. Green roofing is also an option where it suits the building. Each one has a place, and the right one depends on the roof, the traffic and what sits on it.
A flat or low-slope roof also earns its keep as usable space. It carries HVAC units and other rooftop equipment, and it is easy to reach for routine maintenance and inspections. We tailor the roof to those uses instead of forcing a standard solution on every property. For small sheds, garages and outbuildings, roll roofing may be all you need.
Chapter 03
Drainage upkeep
The best-installed low-slope roof still depends on its drains. Clear them before the fall leaves arrive, again after the first real wind of spring, and any time a storm has moved debris across the surface. Look at scuppers, gutters and any spot where you have seen water linger after rain.
Routine inspections catch what a quick glance does not: a seam that is starting to open, a flashing that has let go, a patch that has done its job and is ready to be replaced. Our team handles the maintenance and the repairs that keep a low-slope roof performing, so small items never get the chance to become leaks.
A&A Roofing Services. Licensed and insured, WA L&I ROOFIRS798DE. Call 509-440-2428.