Edge metal
Metal edges and flashed drain bowls to finish the system cleanly.
Flat Roofing
Modified Bitumen Roofing Tenafly, NJ
A roofer in Tenafly can install, repair or replace a modified bitumen roof, the layered asphalt membrane often called torch-down, and match the method to the building and its fire risk. One call to (551) 355-3330 reaches a nearby flat roof pro.
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. Multiple plies make a tough roof that tolerates foot traffic better than many single-ply sheets.
The application method is one of the first decisions on a modified bitumen job. Torch-down uses an open flame to melt the back of the sheet onto the layer below, which makes strong laps but calls for strict fire safety near wood and insulation. 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. Note any blisters or bubbles, cracking in the cap sheet, bare spots where granules have washed off and laps that are lifting at the edges. Mention whether the roof has been coated or patched with roofing cement, since that changes how new material will stick.
If the problem goes deeper than it first looked, a Tenafly roofer may also recommend flat roof replacement or flat roof repair.
Dealing with this in Tenafly, NJ right now? Call (551) 355-3330 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.
Inspect the roof
A core cut and a walk of the roof show how many layers exist and whether moisture is trapped. Those findings decide whether the old roof must come off.
Prep the base
The deck is stripped, repaired and cleaned so the new layers lie flat. Insulation or a cover board is added, with tapered sections where water needs help reaching the drains.
Install the base ply
A base sheet is fastened to wood decks or adhered to insulation and cover board. Its laps are staggered from the cap sheet laps to avoid weak lines.
Apply the cap sheet
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 details
Walls, curbs and penetrations get reinforced flashing plies that run up and are capped with metal. Drains get new flashing, and the roof edge gets new metal.
Walk the finished roof
Once the roof is done, the crew checks every lap, cleans up and keeps a fire watch if torches were used. A final walk checks laps, flashings and drainage.
What is included
What goes into a mod bit roof
Base flashing
Reinforced plies at every wall and curb fastened at the top.
Base sheet
A smooth reinforced base sheet laid with laps offset from the cap.
Insulation
Insulation and cover board so water reaches the drains.
Cap sheet
The finished top layer with protective granules with fully sealed laps.
Related service
Torch Down Roof Repair Tenafly, 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. Granules are pressed into any exposed asphalt so the patch is protected from sun.
Torch work on an occupied home in Tenafly needs extra care, especially near wood fascia, siding and attic vents. Where a flame could reach wood or insulation, a self-adhered patch is the safer choice. A fire watch after torching is a basic part of any torch-down repair.
Related service
Built Up Roofing Tenafly, 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 Tenafly 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 Tenafly, modified bitumen is common on low-slope roofs that see foot traffic or need a tough surface. From Tenafly out to Cresskill, Englewood, Englewood Cliffs and Demarest, roofs range from aging two-ply systems with worn granules to newer self-adhered roofs on additions, so a check of laps and flashings every year or two catches small trouble early.
For modified bitumen roofing in Tenafly, NJ or nearby towns like Cresskill, Englewood, Englewood Cliffs and Demarest, call (551) 355-3330 to reach a roofer who covers your street.
How the weather here affects roofs around Tenafly
Winters here are long and cold, with snow on the roof for weeks at a time and plenty of nights below freezing. 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. Coastal storms and heavy spring rain drive water sideways into flashing, valleys and old chimneys. That is why roof repair in Tenafly is busiest after a hard winter and before the next one.
Why call
Why not wait
Smaller repairs
Small roof problems caught early usually stay small repairs.
Roofers who know Tenafly
Local roofers see the same roofs and storm damage across Tenafly and nearby towns.
Clear next steps
Ask your questions before you agree to anything.
Common questions about modified bitumen roofing
Can a mod bit roof be coated?
Modified bitumen takes coatings well when the cap sheet is sound and the roof drains. The roof is cleaned, repaired and often primed so asphalt oils do not stain the coating. A white coating also lowers roof surface temperatures in summer.
Do I need a tear-off for a new mod bit roof?
The existing roof decides that. If there is a single, dry, sound roof, a recovery board and new mod bit may go over it. Two existing roofs, wet insulation or widespread blistering call for a full tear-off.
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. A reflective coating applied before the cap sheet wears out can extend its life.
Are torch-applied roofs a fire risk?
The open flame is the main concern with torch-down roofing. Good crews fasten the base sheet on wood decks, keep the flame away from edges and gaps and stay on fire watch afterward. Where flame is a concern, peel-and-stick sheets are a common alternative.
What is the difference between modified bitumen and built up roofing?
The two are related, with key differences in material and installation. Mod bit replaces the many felts of a built up roof with a few thick polymer sheets, and it skips the gravel. Mod bit is often preferred today for its flexibility and lower weight.
More questions? Call (551) 355-3330
Often needed together
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Full replacement of failing flat roofs, with a moisture survey deciding tear-off or recover, with tapered insulation where water used to sit.
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Repairs for leaking flat roofs, from punctures and seams to clogged drains and wet insulation, after the real leak source is found, not guessed.
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TPO membrane roofs installed over new insulation or in place of a worn flat roof, with seams welded into one watertight sheet.
Learn moreCommercial Roof Replacement
Tear-off or recover of aging commercial roofs with new insulation and drainage, planned around rooftop units and drains.
Learn more
Looking for something else?
See all roofing servicesTalk to a Tenafly roofer about modified bitumen roofing
Call (551) 355-3330 for a local roofer in Tenafly and nearby towns.