Roof Repair Smedway's Flat Roof Repair crews are trained on TPO, EPDM, and modified bitumen systems across Prosser, not general shingle work applied to a flat surface.


A flat roof leak rarely shows up directly above where the water actually entered — membrane systems move water laterally before it drips through.
Commercial Flat Roof Repair scheduling is built around minimizing disruption to your Prosser business operations.
Insurance documentation available before work begins on any Prosser commercial property.
Local Prosser dispatch minimizes business disruption with scheduling around your operating hours.
Membrane type and repair scope are itemized separately in every Flat Roof Repair estimate.
Hot-air welders and seam probes come standard for TPO and EPDM Flat Roof Repair work.
Most Prosser flat roof issues combine two or three of these elements, which is why a full inspection matters.
TPO seam separation gets properly heat-welded, not just caulked over as a temporary fix.
EPDM punctures and seam failures are patched with compatible materials, not a mismatched quick fix.
Standing water that doesn't drain within 48 hours accelerates membrane breakdown and needs a drainage fix, not just a patch.
We assess whether a modified bitumen repair needs a patch or a full section replacement.
Clogged or damaged drains are a leading cause of Prosser flat roof ponding and membrane stress.
Rooftop HVAC units and their curbs are a frequent source of Prosser commercial roof leaks that general roofers often overlook.

We start by discussing the issue — ponding, active leak, or visible membrane damage.
On-site assessment identifies the membrane type and the actual cause of the issue.
Drainage and ponding issues are assessed alongside any visible membrane damage.
Repaired seams are tested for a proper bond before we leave the site.

They tested the seam repair with water before considering the job done.
— Prosser Homeowner
Scheduled around our tenants' business hours without us even having to ask.
— Prosser Homeowner
Explained the membrane type and why it mattered for the repair approach.
— Prosser Homeowner
They found a second smaller leak we didn't know about while fixing the one we called about.
— Prosser Homeowner

Our low-slope crews serve Prosser businesses and properties across Prosser, WA.
