JOHANNEMANN & SONSGENERAL CONTRACTING · BERGEN COUNTY NJ
(201) 446-5941 Free Estimate
A crew re-roofing a Bergen County home on a clear day
Roofing

Roofs specified for your house.

Repairs, replacements, inspections and urgent repairs across Bergen County — in slate, cedar, standing seam, architectural asphalt and copper. Our own crews, a written scope you can compare, and an honest answer about whether you need a new roof at all.

Emergency? We hold a 24-hour assessment window for impact damage, year-round. Urgent response

Photographed, then priced

Every estimate carries the pictures of what we actually found up there.

No subcontracted tear-off

The crew that quotes the job is the crew that strips and lays it.

Warranty registered for you

Manufacturer registration filed on your behalf when the job closes.

Scope

Everything above the fascia line.

From a single lifted ridge cap to a complete re-slating with new copper valleys — and the flashing, ventilation and decking work that usually turns out to be the actual problem.

See roofs we have done

Repairs & leak diagnosis

We find the entry point before we quote the fix. Water travels along rafters; the stain on the ceiling is almost never under the hole.

Full replacement

Complete tear-off to the deck, deck repair where needed, new underlayment, flashing and ventilation as one system.

Flashing & chimney work

Step-and-counter flashing done properly in metal, not sealed with a tube of roof cement and a prayer.

Ventilation & ice dams

Balanced intake at the soffit and exhaust at the ridge. Most ice-dam problems in this county are ventilation problems.

Inspections & reports

Pre-purchase and pre-winter inspections with a photographed written report you can hand to a lawyer or an insurer.

Low-slope & porch roofs

Rear extensions, dormer cheeks and porch roofs in single-ply membrane or modified bitumen, tied properly into the pitched roof above.

A roofer fastening shingles with a nail gun
Diagnosis

Five things worth getting looked at

None of these means you need a new roof. All of them mean the roof is telling you something, and every one of them is cheaper to deal with in September than in February.

Granules in the gutters

Asphalt shingles shed their mineral surface as they age. A cupful after heavy rain is normal. A gutter with a sand bar in it is a roof in its last few years.

A stain that comes and goes

Intermittent staining usually means wind-driven rain past a flashing, or an ice dam, rather than a hole. It is also the kind of leak that rots a rafter quietly for two years.

Shingles lifting along one plane

Wind damage is directional. If a whole slope looks slightly ruffled from the street, the seal strips have let go even if nothing has blown off yet.

A soft or wavy roof line

Sighting along the ridge from the yard will show sag. That is a deck or a structural issue, and it does not get better under new shingles.

Daylight or damp in the attic

Go up on a bright day with the light off. Pinholes of daylight, damp sheathing or rusted nail points all say the same thing before the ceiling does.

A slate-clad turret and brick chimneys against a clear sky
Materials

A 1928 Tudor and a 2019 custom do not want the same roof.

Six systems, each right for a particular house, budget and pitch. Below is what each one actually costs you in service life — and what it asks of the structure underneath.

A blue-gray natural slate roof with a small dormer

Natural slate

Restoration, selective replacement and complete re-slating in matched stock. The only roof most Bergen County houses will ever need twice.

75–150 years · heaviest · needs a structure rated for it

Overlapping cedar shake shingles on a roof edge

Cedar shake

Set on breathable underlayment with stainless fastenings, so it weathers to silver rather than curling and splitting at the butts.

30–40 years · needs airflow beneath · treatable for fire rating

A gray standing seam metal roof with dormer windows

Standing seam metal

Site-formed panels on concealed clips. No exposed screws and no rubber gasket to dry out, which is what fails on an exposed-fastener metal roof.

50–70 years · excellent on low pitch · sheds snow

Warm copper panels weathering on an architectural roof

Copper

Valleys, flashings, bays, dormer cheeks and gutters. The most expensive metal on the roof and the last piece of it you will ever pay for.

80–100 years · usually a detail, not a whole roof

Close view of an architectural asphalt shingle valley

Architectural asphalt

The sensible default for most houses. The difference between a good asphalt roof and a bad one is entirely in the underlayment, the flashing and the ventilation.

25–35 years · lowest cost · widest color range

A modern house with a low-slope roof against a blue sky

Low-slope membrane

TPO, EPDM or modified bitumen for rear extensions, porch roofs and dormer tops — fully adhered and properly terminated where it meets the pitch above.

20–30 years · for pitches under 3:12 · seam quality is everything

The honest question

Repair or replace?

Roofing companies have an obvious incentive here, so it is worth knowing the rule of thumb before anyone climbs your ladder. Ours is simple: if repairs would cost more than about a third of a replacement, replacement is usually the better money.

Repair is the right answer when

The roof has service life left and the failure is local.

  • The field of the roof is sound and the shingles are still flexible and sealed.
  • The leak traces to a flashing, a chimney, a valley, a vent boot or a skylight curb.
  • Damage is confined to one slope — typically wind on the windward side.
  • The roof is under about fifteen years old and the deck is dry.
  • You are selling within a couple of years and need it watertight and documented.

Typical outcome: a same-week fix, photographed before and after, with the rest of the roof left alone.

Replacement is the right answer when

The material is at the end of its life, or the deck is.

  • Granule loss is heavy and shingles are brittle, cupped or cracking across several slopes.
  • The sheathing is soft, delaminating or sagging between rafters.
  • There is already a second layer on the roof, hiding whatever is underneath it.
  • You have paid for three or more repairs in the last few years.
  • Repeated ice damming has soaked the eaves — that needs the eaves opened, not patched.

Typical outcome: a full tear-off with deck repair priced separately and only charged if it is needed.

Two things to be wary of

Be careful with anyone who quotes a full replacement without going into the attic, and with anyone who offers to cover your insurance deductible. The first cannot know the condition of the deck. The second can only be done by inflating the claim, which is insurance fraud in your name — and a contractor comfortable proposing that is comfortable with other things.

What you are actually buying

A roof is seven layers. The shingle is one of them.

When two estimates are thirty per cent apart, the difference is almost always in this table rather than in the brand on the bundle. Ours specifies every line of it in writing.

LayerWhat we specifyWhy it matters
DeckInspected board by board after tear-off; soft or delaminated sheathing replaced in kindFasteners only hold in sound wood. This is the line most quotes leave open-ended.
Ice & water membraneSelf-adhering membrane at eaves, valleys, and around every penetrationNew Jersey freeze-thaw drives water uphill under shingles. This is the layer that stops it.
UnderlaymentSynthetic underlayment across the field; breathable felt beneath cedarThe secondary water barrier, and the only thing protecting the deck during the install.
FlashingMetal step and counter flashing at walls and chimneys; open metal or woven valleysMost leaks are here, not in the field. Roof cement over old flashing is a two-year fix.
VentilationBalanced intake at soffit plus continuous ridge exhaust, sized to attic volumeUnbalanced ventilation cooks shingles from below and builds ice dams above.
Roof coveringThe material chosen for the house, fastened to the manufacturer's wind-rated patternUnder-nailing or high-nailing voids the warranty and is invisible from the ground.
Edge & trimDrip edge at eaves and rakes, ridge and hip caps, new pipe boots throughoutOld pipe boots outlive their rubber collars and leak long before the roof does.
On the day

How a re-roof actually runs

Most of a roof replacement is preparation and protection. The part where shingles go on is the short bit.

1

Protect

Plywood over windows and doors where needed, tarps over beds and shrubs, dumpster positioned on boards to protect the driveway.

2

Strip

Down to the deck, one slope at a time, so the house is never open across the whole roof if the weather turns.

3

Inspect

Deck checked and repaired, and you get photographs of anything we find before we cover it up.

4

Lay

Membrane, underlayment, flashing, field and ridge in sequence, with ventilation set as the roof goes on.

5

Clear

Magnetic sweep of the whole property, gutters cleared of debris, and a walkthrough before we invoice the balance.

A roofer rolling out synthetic underlayment across a roof deck
Underlayment and ice-and-water membrane go down the same day the slope is stripped.
New flashing and a roll of membrane at a brick wall junction
Wall and chimney junctions get new metal, not a bead of sealant over the old.
Questions

What homeowners ask us

How long does a roof replacement take?

A straightforward asphalt re-roof on an average Bergen County colonial is normally one to two days on site. Cedar and synthetic slate usually run three to five. Natural slate and standing seam are measured in weeks rather than days, because both are cut and fitted on site. Weather moves all of these, and we will not open a slope we cannot close the same day.

Can you repair the roof instead of replacing it?

Often, yes. If the field is sound and the leak is at a flashing, a chimney, a valley or a vent boot, a repair is the honest answer and it is what we will put in writing. We will also tell you plainly when a repair is throwing money at a roof that has three years left in it.

Do you tear off the old roof, or go over it?

We tear off. A second layer is permitted in some circumstances, but it hides the condition of the deck, traps heat that shortens the life of the new shingles, and makes the next replacement more expensive because there are then two layers to remove. Full tear-off is what we price as standard.

What does a new roof cost around here?

It depends on material, pitch, stories, the amount of flashing and the condition of the deck. Architectural asphalt sits at the lower end, cedar and synthetic slate in the middle, and natural slate, copper and standing seam at the top. We give a fixed written price after measuring the roof, rather than a price per square over the phone — a phone number is a guess, and guesses get revised upward once the ladder is up.

Will you work with my insurance company?

Yes, for impact damage. We photograph and measure the damage, write an itemised scope in a format adjusters can process, and meet the adjuster on site. What we will not do is offer to waive or absorb your deductible — the only way to do that is to inflate the claim, and that is insurance fraud in your name.

More on how we document claims on the impact damage page.

What warranty comes with the roof?

Two separate things. The manufacturer warrants the material, and that warranty only holds if the installation is registered and installed to their specification — we file the registration on your behalf and send you the confirmation. Separately, we warrant our workmanship. Both are stated in the contract before you sign it, in plain language, with the term written down.

How can I tell whether a roof was installed properly?

Look at the details rather than the field. Is there ice-and-water membrane at the eaves and in the valleys? Is the chimney flashed with proper step-and-counter metal, or sealed with tar? Is there intake ventilation at the soffit as well as exhaust at the ridge? Those three tell you more about an installation than the brand on the shingle does.

Do you handle the gutters and siding at the same time?

Yes, and it is usually cheaper to do it together. The roof-to-gutter and roof-to-wall transitions are where most water gets in, and they are detailed properly when one contractor owns both sides of the joint. See gutters and siding.

Let us get up there and tell you what is actually happening.

Free, no obligation, and you get the photographs whether or not you use us.