Roof Drain Leak Repair Spokane WA | Commercial Plumbing Service

A roof drain leak can be confusing because the water does not always appear directly below the problem. In this Spokane service call, the visible leak was inside the building, but the source was tied to the roof drain piping connection above.

After inspection, the issue was found where the pipe connects to the roof drain assembly. The connection band had come loose and slipped out of position, allowing water to escape during drainage.

What the three photos show

The first image shows the rooftop drain area. This is where water collects and enters the drainage system during rain or snowmelt. Staining and previous patching around the drain area made it important to trace the system carefully instead of assuming the leak was only at the roof surface.

The second image shows the pipe connection closer up. This is the area where the connection band had slipped. Once a band moves out of place, it can no longer seal the joint correctly.

The third image shows the interior roof drain piping running down through the building. This kind of exposed vertical piping is common in commercial spaces, and it is one reason commercial plumbing repairs often require inspection from more than one angle.

commercial rooftop drain area with staining and signs of leak near drain

close view of roof drain pipe connection band inspected after leaking

Accessing the failed connection

The pipe insulation had to be removed so the connection could be inspected and repaired properly. Once the band was exposed, it was reset into the correct position and torqued to proper specifications.

This step matters because the connection has to hold under real drainage conditions. A band that is loose, uneven, or under-torqued can allow the same leak to return the next time water moves through the roof drain system.

Why roof drain leaks need proper diagnosis

Roof drain systems move a large amount of water through the building. If a connection fails, water can travel along insulation, framing, pipe surfaces, or wall cavities before it becomes visible.

That is why the repair is not just about stopping visible water. The actual failure point needs to be found and corrected so the system can drain properly without causing hidden moisture damage.

The roof drain area was inspected from above.
The interior drain piping was checked from inside the building.
The insulation was removed to access the connection.
The slipped band was reset and torqued correctly.
The leaking pipe connection was repaired.

Repairing the pipe connection correctly

In this case, the drain pipe itself did not need to be replaced. The problem was the connection band at the roof drain assembly. Once the band was reset and tightened properly, the connection could seal the way it was intended to.

Repairs like this often overlap with pipe repair because the issue is not always with the fixture or drain opening, but with the connection between piping sections.

Spokane roof drain and leak repair service

For property owners in Spokane, leaks around roof drains, exposed piping, or interior drainage systems should be inspected before they create ongoing building damage.

If you have water showing up near a roof drain, ceiling, wall, or exposed pipe, call (509) 899-8883 or use the contact form to schedule service.