The most expensive puncture is the one nobody finds. A hole the size of a coin lets in a cup of water a day, and the insulation under it takes that water and holds it. By the time a stain shows on a ceiling, the wet area may be ten feet across. Coeur d'Alene sits under a 60 psf ground snow load with a severe weathering rating, so a puncture that leaks in the fall becomes a frozen, expanding void by January.
We find punctures, patch them and check the board under each one. The owner pays a unit price per patch and a separate unit price for any wet insulation we find.
The Call: Patch, Plate or Replace the Panel
A small puncture gets a patch of compatible membrane, welded or adhered, with rounded corners and overlapping the hole by a few inches. A larger tear or a cluster of holes gets a plate, a bigger piece of membrane set over the whole damaged zone. A worn path with dozens of scuffs and holes gets a replaced panel or a new walk pad system. On a roof that is nearing replacement, a temporary plate and a few pads can carry it through one more winter at far less cost than a full repair.
The call follows the system and the count. On thermoplastic membranes such as TPO, patches are heat-welded. On EPDM, they are tape or adhesive. In every case the surface must be clean, and the patch must match the membrane. We map every puncture on a roof plan with a photo and a number, so the owner and the GC can see the count, the locations and the pattern.
What It Costs: By the Patch, Plus the Board Under It
Patches are priced per item, with size tiers: small, medium and large. A call-out minimum covers mobilization. Wet insulation is separate and priced per square foot, since it depends on how far the water traveled. The first walk is a moisture scan and a few cuts at the worst spots, so the allowance is real and not a guess.
Walk pads are a separate line, installed along routes that technicians use to reach rooftop units. A path of pads costs little against the cost of a worn membrane that has to be replaced. For roofs with heavy trade traffic, a protective layer under pads, or a cover board under the membrane when the roof is replaced, spreads the load. Insulation selection and cover board choices can reduce future puncture damage, since a firm substrate resists foot damage better than soft board.
What the Code Sheet Says: Snow, Ice and Falling Things
Snow removal is a common source of punctures: shovels, pry bars and ice scrapers cut membranes. Clearing a roof after a heavy wet storm is where shovels meet membrane. We advise hand tools with plastic blades and a rule to leave the last couple of inches of snow, and we do the clearing where it is needed.
The November 17, 2015 windstorm brought down trees across the region. A branch through a membrane is a puncture with a bruise around it and often a crushed layer of insulation underneath. After such an event, we walk the roof and treat every impact as suspect. Falling ice from taller buildings and signs is another cause, and the debris tells where to look.
Not every puncture is obvious. A fastener head that has worked up through the membrane, a screw dropped and stepped on, a stone pressed in by a boot, or a pitted spot where a tool was set down all leave small cuts. We run a hand over the surface along each traffic route and photograph each scar, including the ones that have not yet penetrated, because a scar is a weak spot that will open in the next freeze.
Where It Fails First: Equipment Paths and Access Points
The pattern is predictable. The routes between the roof hatch and each rooftop unit take the most traffic. The area around a unit where technicians kneel sees dropped tools and screws. The edges where ladders lean get scuffed. Other trades add to it: HVAC technicians, electricians, antenna and sign installers, and solar crews each leave a trace.
We look at these zones first. At Riverbend Commerce Park, tilt-up buildings with several rooftop units have long service paths across the field. Roofs in Post Falls and along the Rathdrum Prairie share the same pattern. The cleanest fix is a rule: nobody goes on the roof without signing in, and every visit is logged with a note of what was done. Our rooftop equipment curbs and supports work ties into that rule, since each unit needs a safe path. Where several trades share a roof, the rule works better than any sign. A hatch log with a name, a date and the work done tells us who was there when a new hole shows up, and it takes the argument out of the repair bill.
Alternates: Walk Pads, Protection Layers and Access Control
Alternates are simple lines. Walk pads on the main routes. Protective mats under equipment legs. A hatch or ladder landing pad. A roof access log kept at the hatch. An annual puncture walk with photos. Each helps the owner avoid the same bill next year, and each has a price.
When a roof has too many punctures to patch economically, the scope compares the cost of patching with the cost of a larger repair or a recover. The break point is a roof where holes appear faster than they can be repaired, or where wet insulation has spread. We lay out both options with prices, each with its life expectancy noted, so the owner can set the break point for that building. A seam failure repair may be part of the same visit, since traffic damage often shows up at seams.
Schedule and Snow Window: Patch Fast, Patch Dry
A puncture needs a dry surface and moderate temperature for a permanent patch. In winter, a hole is covered with a temporary cold-applied patch that holds until spring. We prefer to patch in the same visit as the discovery when conditions allow, since each rain or melt cycle adds water to the board.
Schedule a walk after any event that puts people or objects on the roof: a snow removal, a storm, an equipment install. A short maintenance walk in the week after catches new holes while they are small. We log the date and photo of each patch, and the log shows whether a path is wearing out. A path that shows a new scuff every month is a path that needs a pad. A path that stays clean for a year does not, and the owner can save the money. That log is what supports the walk pad decision at the next budget meeting.
Commercial Roofing Questions
Can a small puncture wait?
No. It lets in water daily, and the insulation holds it. Patch it, and check the board under it. If the board is wet, it comes out, and the patch goes on over dry material.
How do you find punctures?
A close walk, moisture meters and, for large roofs, an infrared scan after a cool evening.
Should we shovel snow off the roof?
Only where needed, with plastic tools, and leave a couple of inches on the surface. Call us for a clearing plan.
Do walk pads really help?
Yes. They protect the membrane on the routes people actually use.
What about trade damage?
Require sign-in at the roof hatch, and walk the roof after each trade visit.