Cap sheet
A top ply surfaced with mineral granules to shield the asphalt from sun.
Flat Roofing
Modified Bitumen Roofing Rutherford, NJ
Modified bitumen roofing in Rutherford is a multi-ply asphalt roof, usually a base sheet and a granulated cap sheet, used on flat and low-slope roofs, which holds up well to foot traffic and patches easily. Call (551) 380-1579 to reach 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. Sheets come in SBS, a rubber-modified type that handles cold well, and APP, a plastic-modified type made for torching. 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. Torching gives tight, fused laps, but the flame is a fire risk near wood decks, parapets and anything combustible. For homes and buildings where open flame is a concern, self-adhered or cold-process sheets are the usual answer.
A few details help the roofer plan. Look for blisters, splits, granule loss and seams that curl up at the edge, and note where water stands after rain. Mention whether the roof has been coated or patched with roofing cement, since that changes how new material will stick.
Modified Bitumen Roofing is often paired with flat roof replacement and flat roof repair, depending on the cause.
Looking for Rutherford modified bitumen roofing? Call (551) 380-1579 to reach a nearby roofing contractor.
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. That decides between a tear-off and laying new plies over a sound, dry existing roof.
Tear off old roofing
Old roofing is removed where needed, rotted decking is replaced and the surface is swept clean. Insulation or a cover board is added, with tapered sections where water needs help reaching the drains.
Lay the base sheet
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 top ply goes on with the chosen method, granules facing up for sun protection. On torched laps, a steady bleed-out of asphalt at the edge shows a good seal.
Flash the details
Walls, curbs and penetrations get reinforced flashing plies that run up and are capped with metal. New drip edge or gravel stop and properly set drain flashings finish the edges.
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
Insulation
Insulation and cover board to improve drainage and efficiency.
Base flashing
Two-ply flashing up walls and parapets where most flat roof leaks start.
Edge metal
New edge metal and drain flashings to finish the system cleanly.
Base ply
A fastened or adhered base layer over a clean, sound deck.
Related service
Torch Down Roof Repair Rutherford, NJ
Repairing a torch-down roof usually means cutting out the bad section and fusing new modified bitumen over it. 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 Rutherford call for careful torch handling. Many roofers switch to self-adhered or cold-applied patches in tight spots where an open flame is a risk. A fire watch after torching is a basic part of any torch-down repair.
Related service
Built Up Roofing Rutherford, NJ
A built up roof is made of several plies of felt mopped together with hot asphalt or coal tar pitch, then flood-coated and covered with 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. With age, these roofs blister, crack at the flashings and open at the edges.
Most built up roof repairs in Rutherford start by clearing the gravel, then patching with new plies and setting gravel back in place. Because these roofs are heavy, recovering over one can strain the structure, and many owners choose a tear-off when the time comes. 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
Modified bitumen roofs in Rutherford cover everything from older homes with flat sections to strip centers and churches. From Rutherford out to East Rutherford, Wallington, Carlstadt and North Arlington, roofs range from aging two-ply systems with worn granules to newer self-adhered roofs on additions, and the first step is finding out how many layers are already on the deck.
Searching for modified bitumen roofing near me from Rutherford or East Rutherford, Wallington, Carlstadt and North Arlington? Call (551) 380-1579 to talk to a roofer who works in your part of town.
What the local climate does to a roof
Cold winters bring snow, ice and a long stretch of freezing nights. 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 Rutherford is busiest after a hard winter and before the next one.
Why call
Why not wait
Less damage
Small roof problems caught early usually stay small repairs.
Local knowledge
Roofers in Rutherford know the roof types and weather wear common in local homes.
Know what happens next
Ask the roofer about the cause, the options and the estimate before work starts.
Modified Bitumen Roofing questions
Are torch-applied roofs a fire risk?
Fire risk with torch-down comes from the flame during installation, not the finished roof. 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.
How long does a modified bitumen roof last?
Most mod bit roofs last somewhere between 15 and 25 years with reasonable care. Good drainage, intact granules and sound flashings push it toward the long end. Some owners extend the roof with a coating once granules start to thin.
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.
Do I need a tear-off for a new mod bit roof?
What is already up there sets the answer. 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?
The two are related, with key differences in material and installation. Built up roofing uses many plies of felt mopped with hot asphalt or coal tar and is topped with gravel, while modified bitumen uses fewer, thicker polymer-modified sheets with a granulated cap. Mod bit is often preferred today for its flexibility and lower weight.
More questions? Call (551) 380-1579
Related services
Flat Roof Replacement
Replacing old built-up, torch-down, EPDM or TPO roofs with a new system built to drain, with tapered insulation where water used to sit.
Learn moreFlat Roof Repair
Flat roof repairs matched to the membrane, whether EPDM, TPO, PVC, modified bitumen or built-up, with the patch made from material that bonds to what is there.
Learn moreTPO Roofing
Heat-welded TPO membrane for flat and low-slope roofs, with seams welded into one watertight sheet.
Learn moreCommercial Roof Replacement
Tear-off or recover of aging commercial roofs with new insulation and drainage, with nightly tie-ins to keep the building dry.
Learn more
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