Base flashing
Flashing that runs up the wall and under metal where most flat roof leaks start.
Flat Roofing
Modified Bitumen Roofing Mountainside, NJ
Modified bitumen roofing in Mountainside is a multi-ply asphalt roof, usually a base sheet and a granulated cap sheet, used on flat and low-slope roofs, and match the method to the building and its fire risk. Dial (908) 728-6030 to talk through modified bitumen with a local roofer.
Modified bitumen is asphalt with rubber or plastic polymers mixed in, made into reinforced rolls that go down in two or more layers. 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.
The application method is one of the first decisions on a modified bitumen job. Torch-applied sheets fuse tightly at the laps, though the open flame demands care around wood framing, insulation and roof edges. 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.
Depending on what the roofer finds, modified bitumen roofing in Mountainside, NJ can go hand in hand with flat roof replacement and flat roof repair.
Need modified bitumen roofing in Mountainside? Call (908) 728-6030 and describe the problem to a roofer who works in Mountainside.
Call nowThe process
The modified bitumen process
Each layer of a mod bit roof has its own job.
Survey the existing roof
The roofer checks the deck, counts existing layers and looks for wet insulation, often with a core cut. With two roofs already in place or wet insulation present, a tear-off is the norm.
Ready the substrate
Old roofing is removed where needed, rotted decking is replaced and the surface is swept clean. Where the roof ponds, tapered insulation is added to move water off.
Lay the base sheet
The first ply is nailed or mechanically fastened on wood, or set in adhesive over insulation. Laps are offset so seams in the cap sheet do not land on seams below.
Install the cap
A cap sheet with mineral granules is applied over the base sheet. At torched laps, a small bead of melted asphalt should show along the edge, a sign the seam has fused.
Flash the walls
Base flashing runs up walls and parapets in two plies and is fastened at the top under metal counterflashing or a termination bar. Edge metal, drain flashing and pipe flashings complete the system.
Final check
Once the roof is done, the crew checks every lap, cleans up and keeps a fire watch if torches were used. The last step is a full walk to confirm laps and flashings are sealed.
What is included
Parts of a modified bitumen roof
Base sheet
The first ply of polymer-modified asphalt that gives the roof its first line of defense.
Tapered insulation
New insulation where the roof is torn off built to current code levels.
Cap sheet
A granulated cap sheet in white or a dark color to shield the asphalt from sun.
Edge metal
New edge metal and drain flashings so water leaves the roof where it should.
Related service
Torch Down Roof Repair Mountainside, NJ
Repairing a torch-down roof usually means cutting out the bad section and fusing new modified bitumen over it. A blister is cut in an X or cut out, the area is dried and sealed, and a new piece of cap sheet goes over it. Granules are pressed into any exposed asphalt so the patch is protected from sun.
Torch work on an occupied home in Mountainside needs extra care, especially near wood fascia, siding and attic vents. Near combustible materials, a cold-process or peel-and-stick patch can replace torching. After torching, a watch period for smoldering material is standard practice.
Related service
Built Up Roofing Mountainside, NJ
Built up roofing stacks three or more plies of felt and bitumen into a thick, heavy membrane, finished with a layer of gravel. The gravel protects the bitumen from sun and foot traffic, so bare spots where it has blown or washed away are a common source of trouble. These roofs can last a long time, but blisters, splits and failed flashings show up as they age.
Most built up roof repairs in Mountainside start by clearing the gravel, then patching with new plies and setting gravel back in place. Replacement often means a tear-off, since the gravel and the weight make recovering difficult. 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 Mountainside, modified bitumen is common on low-slope roofs that see foot traffic or need a tough surface. Homes and buildings in Mountainside and around Westfield, Summit, New Providence and Garwood face summer sun, heavy rain and the occasional strong storm, all of which wear on cap sheets and laps, so the right method depends on what is up there now.
Need modified bitumen roofing around Mountainside? Call (908) 728-6030 for a Mountainside roofer who serves the towns around it too.
How the weather here affects roofs around Mountainside
Winters here are long and cold, with snow on the roof for weeks at a time and plenty of nights below freezing. When warm attic air melts the snow, the meltwater runs down and freezes again at the eaves, building ice dams that push water up under the shingles. Coastal storms and heavy spring rain drive water sideways into flashing, valleys and old chimneys. That is why roof repair in Mountainside is busiest after a hard winter and before the next one.
Why call
Why fix it now
Smaller repairs
A roof problem fixed early rarely spreads to the decking, the insulation or the ceilings.
Local knowledge
Roofers in Mountainside 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.
Modified Bitumen Roofing questions
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. Coating an aging but sound roof can add years.
Are torch-applied roofs a fire risk?
Torching uses an open flame, so it carries a real fire risk that has to be managed. Good crews fasten the base sheet on wood decks, keep the flame away from edges and gaps and stay on fire watch afterward. On homes, self-adhered or cold-applied modified bitumen avoids the flame entirely.
Do I need a tear-off for a new mod bit roof?
What is already up there sets the answer. One dry existing roof can often stay in place under a cover board. Two existing roofs, wet insulation or widespread blistering call for a full tear-off.
Should I coat my modified bitumen roof?
Coating an aging cap sheet is a common way to add years to a mod bit roof. The roof is cleaned, repaired and often primed so asphalt oils do not stain the coating. Reflective coatings keep the roof cooler and slow granule loss.
How does mod bit compare to tar and gravel?
Both are asphalt roofs built in layers, but they are made differently. Built up roofs stack felts and hot bitumen with gravel on top, and mod bit uses two or three factory-made sheets with granules. The polymer sheets stay flexible in cold and are easier to repair.
More questions? Call (908) 728-6030
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, and new flashing at every wall, curb and drain.
Learn moreFlat Roof Repair
Repairs for leaking flat roofs, from punctures and seams to clogged drains and wet insulation, so the roof sheds water again without a full replacement.
Learn moreTPO Roofing
TPO membrane roofs installed over new insulation or in place of a worn flat roof, sized to the deck, the drains and the way the roof is used.
Learn moreCommercial Roof Replacement
Commercial roof replacement phased around tenants and business hours, from core cuts to closeout.
Learn more
Looking for something else?
See all roofing servicesTalk to a Mountainside roofer about modified bitumen roofing
Call (908) 728-6030 to talk to a roofer serving Mountainside, NJ.