As an Archbald commercial roof repair contractor, we repair drain flashing and clamps and coordinate plumbing work when the leak starts in the pipe below.
Archbald commercial roof repair on industrial and warehouse buildings often centers on the drains that carry water through the building.
An interior drain has several joints: the membrane clamp at the roof, the bowl, the outlet, and the pipe running below the deck. Any one can leak, and from inside they all look alike.
We check the membrane attachment, the outlet, and the wet materials around it. When the pipe is at fault, plumbing work is coordinated so the roof is not patched over a pipe problem.
Drain leaks come from four places, two on the roof and two below it.
Water pooling around a drain with leaves and grit in the strainer.
Backed-up water reaches seams and flashing that normally stay dry. The strainer is cleared and the flashing checked.
A drip directly under the drain during steady rain.
The ring holding membrane to the bowl has loosened. Resetting it with new target flashing closes the joint.
Wet ceiling around a drain pipe even after the roof flashing tests dry.
The pipe or its joints below the roof are leaking. That repair goes to the plumbing trade.
Soft roofing in a ring around the drain.
Water has soaked the insulation near the bowl. Wet boards are replaced before the drain is reflashed.
Drain repairs hold when every joint from strainer to pipe has been checked.
Roofing gets patched again and again while the pipe below keeps leaking.
Outlet and pipe are checked together, and the plumber fixes pipe faults.
A loose ring lets water slip between the membrane and the bowl.
The ring is reset and new target flashing is added around the bowl.
Debris holds water at the drain where seams sit wet for days.
Strainers are cleared and replaced if broken, and seams nearby are checked.
Wet insulation around the drain keeps the ceiling damp after repairs.
Wet boards around the bowl come out and dry insulation goes in.
Old cast bowls crack in freezing weather and leak no matter how tight the clamp is.
The bowl is replaced and set at the right height, then the membrane is flashed to it with new target flashing.
Each part of the drain has its own repair.
When the leak sits in the outlet or pipe, the plumbing fix and the roof work are scheduled together.
The clamping ring is reset over new target flashing welded to the field membrane.
Insulation around a high drain is cut into a sump so water reaches the bowl.
Cracked or missing strainers are replaced to keep debris out of the pipe.
Cracked or corroded bowls get replaced, with the new bowl set low enough that the roof drains toward it.
Put a cover over what sits below and call. We check the roof joint and the pipe before opening anything.
Drain repairs follow the water from the strainer down.
Strainers come off and the clamp, bowl, and target flashing get checked for gaps.
The outlet and pipe joints are inspected from inside where access allows.
Samples near the bowl show whether insulation is wet.
Roof joints get our repair; pipe faults get the plumbing trade.
Each drain checked goes on the roof map with what was found.
These towns are part of our repair area too. Building outside them? Call us or send us a message.
A leak in the outlet or the piping below the roof connection is a plumbing fault. We check those parts together with the membrane attachment and nearby wet materials.
Bringing both trades in keeps the roof from being patched over and over above a pipe problem.
If the ceiling stays wet after the roof flashing tests dry, the pipe is the likely source. Water at the pipe joints inside is another sign. The inspection checks both.
The drain can sit higher than the roof around it, or insulation nearby has settled. A tapered sump around the bowl lets water reach it.
Yes. Clearing leaves and grit each spring and fall keeps water moving to the bowl and away from nearby seams.
In most cases, with covers in place and the work timed around production. The plan sets protection before the drain is opened.
Target flashing is a square of membrane welded or adhered around the drain bowl under the clamping ring. It gives the clamp a fresh, continuous surface to grip, which closes the joint where water most often slips between the roof and the drain.
Every drain on that roof section gets a look during the visit. Drains often share the same age, debris load, and clamp condition, so a failing ring at one bowl is a good reason to open the strainers on the others.
Tell us which drain leaks and what sits below it. We check the roof and the pipe, then quote.