How a Commercial Roof Gets Rebuilt, Step by Step
A commercial roof replacement moves in a fixed order, and skipping a step is how leaks come back in year two. Here is how we sequence a low-slope job so tenants stay dry and the building stays open.
- A roof asset survey comes first, mapping every membrane seam, scupper, drain, and parapet wall so the scope matches what is actually on the roof deck.
- We protect the building before we open anything, hanging a safety harness line off rated anchors and staging material on the scaffold clear of tenant entrances.
- Tear-off strips the old built-up roof or EPDM down to the substrate, and out come the pry bar and roofing shovel to check the plywood and OSB sheathing for rot.
- Insulation board and a vapor barrier go down next, because an assembly that cannot dry condenses water inside the building all winter.
- The new membrane, whether TPO, PVC single-ply, or modified bitumen, gets rolled out in staggered courses, lapped, welded or torched, then sealed at every pipe boot and vent.
- We close out the parapet, coping, and flashing details and confirm the work meets local building code before a single invoice goes out.
That final walkthrough is where a roofing contractor earns repeat work. Debris goes in the dumpster, fasteners and screws get one last look, and small details get hand-sealed with mastic, roof cement, sealant, and caulk.
Choosing the Right Membrane for a Newark Rooftop
Membrane choice drives cost, warranty length, and how a roof handles a Newark summer. We quote a system rather than a generic price per square, because the wrong sheet fails early.
- TPO is a white single-ply membrane that reflects summer sun, heat-welds into one continuous sheet, and suits warehouses with heavy rooftop traffic.
- EPDM is black rubber that shrugs off freeze-thaw cycling, and it is often the cheapest recover option when the existing roof deck is still sound.
- PVC single-ply resists kitchen grease and chemical exhaust, which makes it the right membrane over a restaurant or a lab tenant.
- Modified bitumen arrives in rolls and goes down with adhesive, self-adhered, or torched, a fit for buildings that need a repair coat instead of a full tear-off.
- Built-up roof assemblies layer roofing felt, bitumen, and asphalt into a redundant membrane that forgives punctures and foot traffic.
- A standing-seam metal panel over a batten or counterbatten grid handles mansard and gambrel rooflines where a flat sheet reads wrong against the architecture.
- Reflective coating buys a tired membrane a few more years, but it will not fix a wet insulation board underneath.
What We Inspect, and What Roof Failure Looks Like
Water rarely enters where the stain shows up. It wicks along the decking until it finds a seam or a joist, then drips through. So we inspect the whole assembly.
- Ponding water near a scupper or drain means the roof deck has settled or the insulation is already waterlogged.
- Alligatoring, chalking, and blistering on a tar or modified bitumen surface point to UV degradation and end-of-life wear.
- Open laps and split seams let water wick under the membrane, which is how a small leak becomes a ceiling stain three floors down.
- Rusted fasteners, corroded ribs, and popped screws mean a corrugated panel or metal panel is losing its grip on the purlin.
- Clogged gutters and downspouts push water back under the drip edge, where it rots the fascia and soffit from behind.
Newark Weather, Timelines, and What Moves the Price
Newark averages roughly 26 to 29 inches of snow per season, and a single nor'easter can drop a foot in one storm. Meltwater seeps into a seam, refreezes overnight, and pries it wider.
A 10,000-square-foot low-slope roof with a sound deck usually runs four to seven working days, weather permitting. We phase work around tenant hours and loading docks so a building near Route 21 or Broad Street never shuts down for the job.
A full tear-off adds dumpster, debris hauling, and disposal cost. A recover leaves the existing assembly in place when it is dry and building code allows it, which is usually the cheaper road.
We quote 15 to 30 year no-dollar-limit warranty options where the manufacturer backs the whole assembly, and we will say plainly when a coating or a targeted repair is the better spend.
Roof maintenance pays off more than most owners expect. Clearing drains twice a year and walking the roof before winter catches most of what we see.
Infrared scans are the roofing technology we use to find wet insulation without cutting holes, and the reflectivity of a white TPO membrane helps with energy efficiency through a Newark July.
We do not install green roofing, rooftop gardens, or solar arrays. If sustainability in roofing means a garden roof to you, we will say so up front and point you to a specialist. We cover commercial and residential properties across Essex County.
The Pitched Side of the Same Property
Plenty of buildings are flat on one wing and steep on the other, and a property manager shouldn't need two contractors. On the sloped sections we install asphalt shingle, architectural shingle, three-tab shingle, wood shake, cedar shake, slate, clay tile, and concrete tile.
- Underlayment, synthetic underlayment, and an ice-and-water shield at the eave are what stop an ice dam from backing water under the field course.
- Step flashing, counter-flashing, chimney flashing, pipe flashing, and drip edge get replaced together, since reusing old metal is how a fresh roof leaks.
- Ridge vent, soffit vent, ridge cap, and attic fan get checked as one system, because a roof that cannot breathe cooks its own shingles from underneath.
- Decking, plywood, OSB, and sheathing get swapped where nails, fasteners, and screws have lost their bite into the truss, rafter, joist, or ridge beam.
- A dormer, skylight, or chimney breaks the field, and each needs its own detail: apron flashing, boot flashing, and a valley that drains instead of damming.
- Gutter, downspout, and snow guard work with the rake, hip, gable, and verge to shed water cleanly, and the same waterproofing and weatherproofing scope covers the overhang, canopy, and awning framing.
- On older homes we still pull tar paper and worn felt out from under the shingles, and roof pitch decides whether we walk the roof or stage it from a ladder.
