Commercial roof repair on Staten Island that keeps your doors open
A leak over a register, a stockroom or a tenant's apartment is a business problem. We find the source, make the roof watertight and schedule the work around your hours, so you lose as little as possible.
- TPO, EPDM, PVC and modified bitumen roofs
- Infrared moisture scan to find hidden leaks and wet insulation
- Photo report of the whole roof with every repair
- 24/7 emergency response for active leaks
- 5.0 from 154 reviews
GAF Master Elite®- Lic. #2129904-DCWP
Get your free roof estimate
Step 1 of 3Takes 30 seconds. A real person from our team calls you back, usually within the hour.
Most commercial flat roof leak repairs on Staten Island cost $400–$1,500. Larger membrane sections, drains and storm damage run $1,500–$3,500. We repair TPO, EPDM, PVC and modified bitumen roofs, give you a written price before work starts, and answer emergency calls 24/7.
- Infrared leak detectionHidden moisture found, no guesswork
- Written price in 24 hoursItemized, no pressure
- Emergency calls 24/7We stop the water first
- Up to 50-yr warrantyPlus 25 yrs on workmanship
Commercial roof problems we fix
We start every commercial leak call with an infrared (thermal imaging) scan. Wet insulation under a flat roof membrane holds heat differently from dry insulation, so the camera shows exactly where water is spreading, and how far, before anything is cut open. That keeps repairs targeted and tells you whether the problem is one leak or a roof that needs replacing.
Seam failures
Open or lifted seams on TPO, PVC and EPDM are the most common source of commercial leaks. We clean, re-weld or re-adhere and reinforce them.
Ponding water
Water that sits for days speeds up membrane breakdown. We clear and repair drains and scuppers and add tapered insulation or crickets where water collects.
Punctures and HVAC damage
Foot traffic and equipment service tear membranes. We patch them and can add walkway pads around rooftop units.
Flashing and penetrations
Curbs, pipes, vents and parapet walls are where membranes end, and where most leaks start. We re-flash them to manufacturer details.
Blisters and splits
Trapped moisture and age cause blisters and cracks in modified bitumen and built-up roofs. We cut, dry and patch them, or recommend a section replacement.
Storm damage
Peeled membrane, loose edge metal and coping after a nor'easter. Emergency make-safe first, then a permanent repair.
What it costs, and why
Most repairs fall between $400 and $1,500. Price depends on how much membrane is affected, whether drains or flashing need rebuilding, and how easy the roof is to reach. You get a written, itemized price before we start, with photos of the problem. See the tables below, or our roof leak repair cost guide.
Straight answers for business owners
Will you upsell us a new roof?
No. If a repair will buy you years, that's what we quote. If it won't, the photos show you why.
Who shows up?
Our own crew, not subcontractors. Owner Marke is part of every job.
Are you licensed and insured?
Yes. NYC DCWP license #2129904-DCWP, fully insured, with certificates of insurance on request.
What happens after the repair?
You get photos of the finished work and a written workmanship warranty.
Built for owners and building managers
- One point of contactand a clear written scope for every repair
- Photo reportof the whole roof, so you can plan budgets instead of reacting to leaks
- Work scheduled around customers and tenantswith daily cleanup
Alter Phase Roofing Contracting is a family-owned roofer based on Staten Island, with 19+ years in roofing. We're a GAF Master Elite® contractor, BBB Accredited and rated 5.0 stars across 154 reviews, 109 of them on Google. We repair commercial roofs from St. George and Stapleton to New Springville, Great Kills and Tottenville.
Next step: call (929) 370-1552. For active leaks, the line is answered 24/7. For a full condition report, book a commercial roof inspection. Managing several buildings? See property managers, HOAs and co-op boards.
What commercial roof repair costs on Staten Island
Averages from our own jobs. Your exact price comes in writing after a free inspection.
Roof repair prices · Staten Island
Repair cost by size of the job · Staten Island
Alter Phase Roofing Contracting job averages, updated October 26, 2026. Your exact price comes from a free on-site inspection.
From first call to finished roof.
No pushy salespeople and no surprise bills. Every job follows the same four steps.
- Fast scheduling
We inspect your roof
We climb up, scan for hidden leaks with an infrared camera, find the real cause and take photos so you see exactly what we see.
- Within 24 hours
You get a written quote
Clear options, repair or replace, with materials, cleanup and permits itemized. No pressure.
- On your schedule
Our own crew does the work
Marke is part of every job. We protect your property and clean up every day.
- Final walkthrough
Warranty in writing
Up to 50 years on materials and up to 25 years on our workmanship, handed to you.
What Staten Island customers say
“Called them up thinking I needed a new roof and gutters. They stopped by the same day, gave me an assessment of everything and it turns out the roof was repairable. They didn't try to pressure me into any unnecessary work. Just simply he gave me a couple of prices depending on what I decided to do. They were able to schedule the job quickly for a few days later and by the middle of the afternoon everything was done and it looks great!”
“10/10 would recommend! This is the second time I've used this company, and they've been excellent both times. The first time was a few years ago for a full shingle replacement. Most recently, I called them back to repair my flat roof and gutter system after a rough winter caused pooling and a leak. They came out the very next day to…”
“Alter Phase Roofing Contracting is a very good company. My new roof they installed just in one day, very professional and responsive. Clean very nice after the job and very friendly. The new roof has withstood several heavy rainstorms without any leaks. They are very respectful to come back inspected whole roof to make sure no any…”
“Quick, reliable and does OUTSTANDING work. We had a leak on our roof and made calls and left messages. They were the only company that called me back with in 10 min, they gave me an appointment the same day to come out and check out our roof. When we agreed to use them they were back here in 2 days to replace the roof and did an…”
“Marke and his team did an outstanding job replacing the roof on my 3 story house. From the quick estimate, to the finished product, they took pride, protected my house and property 100%. Marke also found a few bad spots, showed me and kept me informed as repairs were made. There were NO HIDDEN CHARGES!! I can't say enough about them.…”
“I had a great experience with this roofing construction company. The team was professional, reliable, and very knowledgeable from start to finish. They arrived on time, explained everything clearly, excellent work from beginning to end! I'm very happy with the results and would definitely recommend this roofing company to anyone who…”
Commercial roof repair: your questions, answered
Don't see yours? Call or text and you'll talk to someone who actually works on roofs.
(929) 370-1552Commercial roof repair: common questions
Can you repair our roof without closing the business?
Almost always. Most flat roof repairs happen entirely on the roof. We schedule noisy work and deliveries around your hours and keep entrances and sidewalks clear.
Can you provide a certificate of insurance?
Yes. We provide a certificate of insurance on request before work begins, naming your company or building as needed.
Do you repair roofs installed by other contractors?
Yes. We repair all common commercial flat roof systems no matter who installed them. If the roof is still under a manufacturer warranty, tell us so we can protect it.
Should we repair or replace our commercial roof?
If the membrane is mostly sound and the leaks are local, repair. If the insulation underneath is wet over large areas, the roof is near the end of its life, or repairs keep repeating, replacement is usually the cheaper path over the next ten years. Our photo report shows you which situation you're in.
Get an honest answer about your roof.
Free inspection, photos of what we find and a written quote. If it only needs a repair, we'll tell you.
Prefer to talk? Call or text, emergencies 24/7:
(929) 370-1552- Family-owned, Staten Island based
- Owner on every job
- Written warranties, permits handled
Get your free roof estimate
Step 1 of 3Takes 30 seconds. A real person from our team calls you back, usually within the hour.