Base flashing
Reinforced plies at every wall and curb where most flat roof leaks start.
Flat Roofing
Modified Bitumen Roofing Cranford, NJ
Modified bitumen roofing in Cranford 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. Call (908) 562-6887 to reach 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. 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.
How the sheets are applied matters as much as which sheets are used. 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. 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. Say whether the roof has been coated or patched before, because old coatings and mastic affect repairs.
Depending on what the roofer finds, modified bitumen roofing in Cranford, NJ can go hand in hand with flat roof replacement and flat roof repair.
Dealing with this in Cranford, NJ right now? Call (908) 562-6887 and describe the problem to a roofer who works in Cranford.
Call nowThe process
How a modified bitumen roof is installed
Here is how a typical modified bitumen job runs.
Inspect the roof
Before planning, the roofer cuts a small sample to see what is underneath and checks for soft decking. Those findings decide whether the old roof must come off.
Tear off old roofing
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.
Lay the top ply
The granulated cap sheet is torched, set in cold adhesive or self-adhered over the base. Lap edges are checked for a continuous seal, and loose granules are pressed into any bleed-out.
Flash the walls
Parapets and curbs are flashed with mod bit plies, then capped or counterflashed with metal. 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. A final walk checks laps, flashings and drainage.
What is included
What a mod bit roof includes
Cap sheet
The finished top layer with protective granules that takes foot traffic well.
Tapered insulation
New insulation where the roof is torn off to improve drainage and efficiency.
Base ply
A fastened or adhered base layer that gives the roof its first line of defense.
Drain flashing
New edge metal and drain flashings to finish the system cleanly.
Related service
Torch Down Roof Repair Cranford, 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.
In Cranford, many torch-down repairs sit close to wood framing, so fire safety is part of every job. 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 Cranford, NJ
Built up roofing stacks three or more plies of felt and bitumen into a thick, heavy membrane, finished with a layer of gravel. Bare patches without gravel age quickly in the sun and are often where leaks begin. These roofs can last a long time, but blisters, splits and failed flashings show up as they age.
Repairs on a built up roof in Cranford usually involve scraping back the gravel, patching with felt and bitumen or modified bitumen, and replacing the gravel. 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
Around Cranford, mod bit replaced a lot of old tar and gravel roofs years ago, and many of those are now due for work. From Cranford out to Garwood, Westfield, Kenilworth and Roselle Park, 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.
For modified bitumen roofing in Cranford, NJ or nearby towns like Garwood, Westfield, Kenilworth and Roselle Park, call (908) 562-6887 to reach a roofer who covers your street.
Roofs in this climate
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, 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 Cranford 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 Cranford 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 FAQ
What is the lifespan of a torch-down roof?
A two-ply modified bitumen roof commonly lasts around 15 to 25 years. 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 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. If there are already two roofs, blistering throughout or wet insulation, a tear-off is the right move.
How does mod bit compare to tar and gravel?
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.
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. A white coating also lowers roof surface temperatures in summer.
Is torch-down roofing safe?
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. Self-adhered sheets give the same kind of roof without a torch.
More questions? Call (908) 562-6887
Other services that may help
Flat Roof Replacement
Tearing off or recovering a worn flat roof and installing a new membrane, insulation and edge metal, 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
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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