Base sheet
A smooth reinforced base sheet laid with laps offset from the cap.
Flat Roofing
Modified Bitumen Roofing Rockaway, NJ
A local roofing contractor in Rockaway can handle modified bitumen, whether the sheets are torched, self-adhered or set in cold adhesive, after checking the deck, the drainage and what is left of the old roof. Dial (862) 421-0113 to talk through modified bitumen with a local roofer.
A modified bitumen roof is built from rolls of polymer-modified asphalt, typically a smooth base sheet under a cap sheet surfaced with granules. The two main types are SBS, which is rubbery and flexible in cold weather, and APP, which is more plastic-like and is usually torched. The layers give it toughness, which is why it holds up well on roofs that see foot traffic.
There are several ways to put down mod bit, and each suits different buildings. Torching gives tight, fused laps, but the flame is a fire risk near wood decks, parapets and anything combustible. Self-adhered and cold-adhesive systems avoid the flame and are often chosen for homes and occupied buildings.
Knowing the signs makes the first conversation more useful. Watch for raised blisters, alligator cracking, bare patches and open laps, especially near walls and drains. Also mention any past coatings or cement patches, which the roofer will need to deal with.
Modified Bitumen Roofing is often paired with flat roof replacement and flat roof repair, depending on the cause.
Need modified bitumen roofing in Rockaway? Call (862) 421-0113 and describe the problem to a roofer who works in Rockaway.
Call nowThe process
What a mod bit roof job involves
Each layer of a mod bit roof has its own job.
Survey the existing roof
Before planning, the roofer cuts a small sample to see what is underneath and checks for soft decking. With two roofs already in place or wet insulation present, a tear-off is the norm.
Tear off old roofing
The deck is stripped, repaired and cleaned so the new layers lie flat. Rigid insulation and tapered crickets go down next to improve drainage.
Put down the first layer
A smooth base sheet goes down first, fastened or adhered depending on the deck. Laps are offset so seams in the cap sheet do not land on seams below.
Install the cap
The granulated cap sheet is torched, set in cold adhesive or self-adhered over the base. At torched laps, a small bead of melted asphalt should show along the edge, a sign the seam has fused.
Detail the edges
Base flashing runs up walls and parapets in two plies and is fastened at the top under metal counterflashing or a termination bar. New drip edge or gravel stop and properly set drain flashings finish the edges.
Keep a fire watch
If any torching was done, the crew stays on watch after the flame goes off to make sure nothing is smoldering. A final walk checks laps, flashings and drainage.
What is included
What a mod bit roof includes
Drain flashing
Gravel stop or drip edge at the perimeter so water leaves the roof where it should.
Insulation
Insulation and cover board so water reaches the drains.
Cap sheet
A top ply surfaced with mineral granules to shield the asphalt from sun.
Wall flashing
Two-ply flashing up walls and parapets where most flat roof leaks start.
Related service
Torch Down Roof Repair Rockaway, NJ
On a torch-down roof, most repairs involve resealing laps, cutting out blisters and adding new plies over damaged areas. Blisters are cut open, dried, resealed and covered with a patch of new cap sheet that laps well beyond the cut. Loose granules are embedded in the bleed-out so the patch does not weather quickly.
Repairs near walls, vents or wood trim in Rockaway call for careful torch handling. Where a flame could reach wood or insulation, a self-adhered patch is the safer choice. After torching, a watch period for smoldering material is standard practice.
Related service
Built Up Roofing Rockaway, NJ
Built up roofing stacks three or more plies of felt and bitumen into a thick, heavy membrane, finished with a layer of gravel. When the gravel thins out, the asphalt below dries, cracks and blisters. These roofs can last a long time, but blisters, splits and failed flashings show up as they age.
Most built up roof repairs in Rockaway start by clearing the gravel, then patching with new plies and setting gravel back in place. When a built up roof reaches the end of its life, its weight and the gravel usually mean a tear-off before the new roof goes on. The replacement is often a mod bit or single-ply roof that is lighter and easier to maintain.
Local help
Modified Bitumen Roofing Near Me
In Rockaway, modified bitumen is common on low-slope roofs that see foot traffic or need a tough surface. Across Rockaway and nearby towns like Dover, Wharton, Mountain Lakes and Morris Plains, older buildings may still have built-up roofs under a layer of mod bit, which is why the core cut matters, so the right method depends on what is up there now.
For modified bitumen roofing in Rockaway, NJ or nearby towns like Dover, Wharton, Mountain Lakes and Morris Plains, call (862) 421-0113 to reach a roofer who covers your street.
What the local climate does to a roof
Cold winters bring snow, ice and a long stretch of freezing nights. Heat escaping from the attic melts snow on the upper roof, and the water refreezes at the colder eaves, which is how ice dams form and back water up under the shingles. Strong coastal storms push rain into every weak spot at the flashing and valleys. That is why roof repair in Rockaway is busiest after a hard winter and before the next one.
Why call
Why act early
Less damage
Small roof problems caught early usually stay small repairs.
Familiar with local homes
Roofers in Rockaway know the roof types and weather wear common in local homes.
Straight answers
Ask the roofer about the cause, the options and the estimate before work starts.
Common questions about modified bitumen roofing
What is the lifespan of a torch-down roof?
A two-ply modified bitumen roof commonly lasts around 15 to 25 years. Drainage and the condition of the cap sheet granules make the biggest difference. Some owners extend the roof with a coating once granules start to thin.
Are torch-applied roofs a fire risk?
Torching uses an open flame, so it carries a real fire risk that has to be managed. Experienced roofers avoid torching directly on wood decks or near combustible edges, fasten the base sheet over wood instead of torching it, and keep a fire watch after the work. Self-adhered sheets give the same kind of roof without a torch.
Can modified bitumen be installed over an existing roof?
The core cut tells the roofer. A single existing roof that is dry and well attached can sometimes be recovered. Two existing roofs, wet insulation or widespread blistering call for a full tear-off.
How does mod bit compare to tar and gravel?
Both use asphalt, but the plies and surfacing differ. Built up roofs stack felts and hot bitumen with gravel on top, and mod bit uses two or three factory-made sheets with granules. Mod bit is lighter and more flexible, which is why it has replaced built up roofing on many buildings.
Can a mod bit roof be coated?
Modified bitumen takes coatings well when the cap sheet is sound and the roof drains. Loose granules are cleaned off, blisters and open laps are repaired and a primer may be needed to keep asphalt from bleeding through. Reflective coatings keep the roof cooler and slow granule loss.
More questions? Call (862) 421-0113
Other services that may help
Flat Roof Replacement
Replacing old built-up, torch-down, EPDM or TPO roofs with a new system built to drain, so ponding and repeat leaks end for good.
Learn moreFlat Roof Repair
Repairs for leaking flat roofs, from punctures and seams to clogged drains and wet insulation, with the patch made from material that bonds to what is there.
Learn moreTPO Roofing
White, heat-welded TPO single-ply roofing for low-slope homes and buildings, built around proper drainage, flashing and edge metal.
Learn moreCommercial Roof Replacement
Commercial roof replacement phased around tenants and business hours, planned around rooftop units and drains.
Learn more
Looking for something else?
See all roofing servicesTalk to a Rockaway roofer about modified bitumen roofing
Call (862) 421-0113 to talk to a roofer serving Rockaway, NJ.