As a Lansdale commercial roof repair contractor, we fix drains that keep leaking, along with the seams, flashing, and wet insulation around them.
Lansdale commercial roof repair calls lean toward one problem: a drain that leaks again after the last patch.
Another layer of patch material over the drain rarely ends it. A drain connection has four parts that can fail: the bowl, the membrane clamped into it, the pipe below, and the insulation around it.
We look at all four before choosing a repair. If the outlet is blocked or the pipe joint leaks, more roofing on top leaves the real problem in place.
Drain leaks give off clues inside and on the roof. These are the ones that matter most.
Water tracking down the outside of the pipe inside the building points to the bowl or the membrane joint above.
Stacked patches around a drain raise the surface, so water ponds beside the outlet instead of draining into it.
A ring of water around the drain after rain means the outlet sits too high or the strainer is clogged.
Wet ceiling tile right under a pipe fitting can be a plumbing leak, with the roof itself sealed tight.
A spongy area around the outlet shows wet insulation that has been feeding the leak for a while.
Each part of the drain connection gets its own fix.
Corroded or loose clamping rings let water slip under the membrane.
The ring is replaced or reset over a new flashing sheet, sealed to the bowl.
Old patches stack up and lift the surface around the outlet.
Patch layers are cut away so the membrane slopes into the drain again.
Fittings below the roof leak into the ceiling with the roof intact.
Plumbing work is coordinated before the connection above is opened.
Insulation around a leaking drain stays soaked.
Wet board is replaced with tapered insulation that steers water to the bowl.
The repair depends on which part of the drain connection failed.
A new flashing sheet goes under a reset clamping ring, sealed to the bowl and lapped into the field membrane.
Built-up material is removed and tapered insulation installed so the drain sits at the low point again.
Pipe joint leaks go to the plumber, with roof work scheduled after so nothing is opened twice.
Broken or missing strainers are replaced so debris stays out of the pipe.
Price depends on which drain parts failed, how much wet board surrounds the outlet, plumbing work, and access.
Call and tell us how many times it has been patched. That history helps us find what the earlier repairs missed.
Call UsDrain repairs follow the water from the roof surface down the pipe.
Drips along the pipe, stains under fittings, and wet tile near the drain get marked before the roof walk.
The strainer and clamping ring come off so the bowl, the membrane joint, and the flashing can be inspected directly.
Cores near the outlet show how far wet insulation reaches from the drain.
New flashing, a reset ring, replaced board, and corrected slope go in, after any pipe work is done.
Water flows into the rebuilt drain while someone watches the pipe below for any sign of a leak.
We take commercial roof repair work in Lansdale and the towns listed here. Elsewhere? Call us or send us a message.
| Town | County | What We See On Roofs There |
|---|---|---|
| PhiladelphiaHome Base | Philadelphia County | Brick industrial buildings, warehouses with food storage, and occupied offices with flat roofs. |
| Norristown | Montgomery County | Warehouse roofs repaired one bay at a time when the damage stops at solid roofing. |
| Chester | Delaware County | Metal roofs with leaks that start after rooftop equipment has been serviced. |
| Yeadon | Delaware County | Repeat leaks diagnosed from dated leak records, photos, and equipment activity. |
| Lansdowne | Delaware County | Damaged metal panel edges repaired where solid metal remains for fastening. |
Answers about drains and recurring leaks for Lansdale building owners.
The whole connection needs checking first. We open the bowl, the membrane joint, and the pipe below, and core for wet board nearby. If the outlet is clogged or the pipe joint leaks, more roofing on top changes nothing.
The clamping ring, the flashing under it, the bowl, the strainer, the pipe fitting below, and the insulation around the outlet. Skipping any one of them is how a drain ends up patched three times.
Which parts failed, how much wet insulation the cores find, whether plumbing work is needed, and how easy the roof is to reach. A written price follows the inspection.
Drain work happens mostly on the roof. The space under the drain gets cleared or covered while the connection is open, and the drain is closed again before the crew leaves.
Ice in a drain bowl backs meltwater up against the flashing and seams around it. A drain that leaks mainly in late winter often has a weak joint that only backed-up water reaches.
Many low-slope roofs have overflow drains or scuppers set slightly higher than the main outlet, so water still leaves when the main drain clogs. If yours has none, we note it in the scope and the owner decides with the building code office.
Leaves, gravel, and debris collect fastest in fall and after storms. Checking strainers in spring and late fall, and after any big storm, keeps water moving toward the pipe and away from the seams around the bowl.
Send the address and how often the drain has leaked. We will open it up and price the repair.