Flat Roof Replacement in Jersey City

01 Jersey City

Fix the fall, then lay the membrane.

Re-covering a flat roof without correcting the fall reproduces the failure on a new membrane. If water stood on the old system it will stand on the new one, in the same places, and the seams under it will be tested continuously rather than occasionally.

Jersey City

Flat Roof Replacement, and what it actually involves

On a low-slope roof the specification argument is usually about the membrane, and the thing that decides the outcome is usually the drainage.

Stripped to the deck, not re-covered over the old roof
Deck inspected once exposed, with a stated allowance
Scoped against the NJ Uniform Construction Code
Newark and the surrounding Essex, Hudson and Union towns

(973) 788-8324

Two workers on a low-slope roof behind a parapet — Replacement work

01 Low-slope systems

Replace the fall, not just the membrane

A flat roof that ponded before will pond again under a new membrane, in the same places, unless something about the drainage changes.

Ponding is a design fault, not weather

Water still standing forty-eight hours after rain means the fall, the drains or the deck have moved. A new membrane laid over that is being tested continuously instead of occasionally.

Drains sized and sited first

A blocked or undersized outlet turns the roof into a shallow tank. Replacement is the only realistic opportunity to correct outlet positions, so it should be taken.

Tapered insulation earns its cost

Where the structural deck cannot be re-pitched, tapered insulation builds the fall into the build-up. It is the difference between a roof that drains and one that merely has a membrane.

Every penetration is its own detail

Pipes, vents, mechanical curbs and fixings each get flashed individually. On a large roof these outnumber every other failure point put together.

Wet insulation does not dry

Saturated boards under an old membrane stay saturated once a new one is over them. If the survey shows wet insulation it comes out, or the new roof is compromised on day one.

Terminations and upstands

The membrane turning up a wall, and the bar that holds it there, take the stress. The field of the membrane rarely fails first.

02 Applied to Jersey City

What changes about this job here

Mixed stock means mixed systems, often on one site — an old built-up roof beside a newer single-ply. They fail differently and they cannot be replaced to one specification.

Jersey City — mixed era and mixed type

Nearly three hundred thousand people and over a hundred and ten thousand housing units, ranging from nineteenth-century brownstone rows to very recent high-rise construction.

Reference point: the second-largest city in New Jersey, across Newark Bay.

03 On the ground in Jersey City

What gets replaced here, and what makes it awkward

Where the difficulty sits

A city this size has no single roof type, so the era and the form of the specific building decide everything. A brownstone row and a twenty-storey tower share a postcode and nothing else.

Worth knowing locally

Any claim that Jersey City roofs behave a particular way should be treated with suspicion -- the only useful question is which part of it, and what the building actually is.

292,449: Residents
14.75: Square miles
19,835: Per square mile
110,801: Housing units

An old roof covering being stripped back to the deck — Jersey City

Buildings in Jersey City

What the roofs are like in Jersey City

Nearly three hundred thousand people and over a hundred and ten thousand housing units, ranging from nineteenth-century brownstone rows to very recent high-rise construction.

All areas covered

05 The rules that apply

What New Jersey code requires on a replacement

Worth knowing before accepting any quote, because a scope that ignores these is a scope that will change later.

One code, statewide

New Jersey adopts a single Uniform Construction Code and municipalities may not set lesser or greater technical requirements. A correct specification in Newark is correct in Kearny.

Two layers, then tear off

No more than two applications of covering may remain on a structure. A third means a full strip, whatever the quote assumed.

The 25% permit threshold

Replacing more than a quarter of a roof surface within any twelve months requires a construction permit. Splitting one job in two inside that window does not avoid it.

Ice barrier at the eaves

Required in this design zone, running from the eave edge to at least 24 inches inside the interior wall line.

Who enforces it here

In Newark the code is enforced by the city's Department of Engineering, Division of Construction Code Enforcement, which is where permits for qualifying work are issued.

Inspection before cover-up

Where a permit applies, the work is inspected at stages. A programme that ignores inspection windows is a programme that will slip.

Nearby & related

Flat Roof work close to Jersey City

The same job in the areas next door, and the other work we take on in this one.

Flat Roof Harrison Flat Roof Bayonne Flat Roof Kearny Flat Roof East Newark

Replacement in Jersey City Installation in Jersey City Shingle in Jersey City Storm Damage in Jersey City Multi-Family in Jersey City

See every area we do flat roof replacement in across Newark →

Questions

Common questions

General guidance about how these buildings are re-roofed, not a survey of any particular property.

Can the flat roof just be re-covered?

Only if the water drains. A membrane laid over a fall that already ponds will pond in the same places, and the seams under standing water are tested continuously rather than occasionally. Correcting the fall is usually the actual job.

Why does the quote vary so much between similar-looking buildings?

Because the era does. On mixed streets two addresses a block apart can have different deck construction, different layer counts and different ventilation, and those decide the price far more than the roof area does.

Will this need a permit?

Replacing more than a quarter of a roof surface within any twelve months requires a construction permit under the New Jersey Uniform Construction Code. A full replacement is over that threshold, so yes — and the work is inspected at stages.