Attic ventilation installation and repair on Staten Island
A hot, damp attic shortens the life of your roof, raises your cooling bills and leads to mold and ice dams. We install and repair attic vents so your roof can breathe, usually as part of a roof replacement or repair.
- Ridge vents, soffit vents and roof vents installed and repaired
- Leaking vents and vent flashing fixed at the source
- Free inspection of the roof and attic, with photos
- 5.0 from 157 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.
Alter Phase Roofing Contracting installs and repairs attic ventilation on Staten Island and across NYC: ridge vents, soffit vents and roof vents. A good system pulls fresh air in at the eaves and lets hot, damp air out at the ridge, which protects the roof deck and shingles. We check the attic during a free inspection and price any vent work in writing.
- Free inspection with photosYou see exactly what we see
- Written price in 24 hoursItemized, no pressure
- Most roofs done in 1 dayTear-off to cleanup
- Up to 50-yr warrantyPlus 25 yrs on workmanship
Why your attic needs to breathe
Your attic should stay close to the temperature outside: cool and dry in winter, not baking in summer. When it can't vent, the roof pays the price.
Hot summers
A closed-up attic gets far hotter than the air outside. That heat cooks your shingles from below, shortens their life and makes the bedrooms upstairs harder and more expensive to cool.
Damp winters
Warm, moist air from showers, cooking and breathing rises into the attic. Without ventilation it condenses on the cold underside of the roof deck, which leads to mold, rotted plywood and rusty nails. See roof sheathing explained.
Ice dams
A warm attic melts snow on the roof, and the water refreezes at the cold eaves. The ice builds up, water backs up under the shingles and leaks into the walls and ceilings.
Your roof warranty
Shingle manufacturers, including GAF, require proper attic ventilation for full warranty coverage. As a GAF Master Elite® contractor, we make sure every roof we install is vented the way the warranty expects.
Signs your attic isn't venting properly
- Upstairs rooms stay hotin summer, and the air conditioning runs nonstop
- Ice dams or long iciclesalong the gutters in winter
- Frost, damp spots or moldon the underside of the roof boards
- A musty smellin the attic or rusty nail tips poking through the deck
- Shingles curling or blisteringyears before they should
- Peeling painton the eaves and soffits
Attic ventilation services
- Attic vent installationContinuous ridge vents, soffit vents and roof vents, sized for your attic so air comes in at the eaves and goes out at the peak.
- Attic vent repairsCracked vent covers, worn rubber boots and lifted flashing around vents replaced and sealed, which stops one of the most common roof leaks.
- Blocked soffit ventsInsulation pushed against the eaves can block the air coming in. We open the airflow so the whole system works.
- Ventilation upgrades with a new roofThe best time to fix ventilation is during a roof replacement, when we can cut a continuous ridge vent before the new shingles go on.
- Free inspectionWe check the roof and the attic and photograph what we find. Our infrared camera also shows hidden damp spots. See roof inspections.
How a balanced system works
Good attic ventilation needs both halves. Intake vents low on the roof, usually soffit vents under the eaves, let fresh air in. Exhaust vents high on the roof, ideally a ridge vent along the peak, let hot, damp air out. The common building-code rule of thumb is about 1 square foot of net free vent area for every 300 square feet of attic floor, split roughly evenly between intake and exhaust. We also never mix different kinds of exhaust vents on one roof, because a ridge vent and a roof fan, for example, can pull air from each other instead of from the attic.
What it costs
Every attic is different, so we price ventilation work in writing after a free inspection. When it's part of a new roof, the vent work is listed in your roof replacement estimate, so you see exactly what you're paying for.
Why homeowners call Alter Phase Roofing Contracting
We're a family-owned roofer based at 61 Appleby Ave on Staten Island, with 19+ years in roofing. Owner Marke is part of every job and our own crew does the work. We're a GAF Master Elite® contractor, BBB Accredited, licensed by NYC DCWP (#2129904-DCWP) and rated 5.0 stars from 157 reviews. We serve Staten Island, Brooklyn, Queens, Manhattan and the Bronx.
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
“I highly recommend Alterphase Roofing! From start to finish, the experience was excellent. Their team was professional, knowledgeable, reliable, and attentive to every detail. They took the time to explain everything, answered all my questions, and made sure I felt comfortable throughout the process. It's not easy to find a company that truly cares about its customers and takes pride in its work. I really appreciate their honesty, quality of service, and professionalism. I would definitely recommend Alterphase Roofing to anyone looking for a trustworthy roofing company!”
“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…”
“I called for an estimate for a new roof. The price they quoted was way below two other estimates I received. I was also told that it would take 1-2 days to complete. Everything Alter Phase Contracting Inc promised was delivered. They gladly supplied me with their licensing and insurance information. The warranty is printed on my…”
“Just WOW! I expected that this would take several days, they got my new roof done in just 1 day. The guys did a thorough job, from set up to clean up. The price quoted was the price I paid, no gimmicks. True Staten Islanders. My roof looks great, couldn't be more happier. Would recommend to anyone who asks.”
“Marke and his team did an excellent job on replacing my roof! He and his brother came to my house, climbed up the roof to investigate the condition unlike other contractors which were only using a drone to take pictures. He gave me honest opinion and options for replacing my roof. Great communication and very easy to work with during…”
“I called a few roofers & Alter Phase was the only one that returned my call promptly & showed up the next day to give the estimate. They were very detailed in their explanation and immediately put me at ease. They showed up 3 days later and did the work in one day. Every worker on the job was courteous and friendly. My house now…”
Attic ventilation: your questions, answered
Don't see yours? Call or text and you'll talk to someone who actually works on roofs.
(929) 370-1552Attic ventilation: common questions
Why does attic ventilation matter for my roof?
In summer, a closed-up attic gets very hot and heats the shingles from below, which shortens their life and makes the rooms underneath harder to cool. In winter, warm, moist air from the house condenses on the cold underside of the roof deck, which leads to mold, rot and ice dams. Venting the attic keeps it closer to the outside temperature and dry.
What kind of attic vents do you install?
Most homes do best with a balanced system: soffit vents along the eaves to let fresh air in and a ridge vent along the peak to let hot, damp air out. Where a ridge vent isn't possible, we use roof vents or gable vents. We don't mix different kinds of exhaust vents on one roof, because they can pull air from each other instead of from the attic.
How do I know if my attic needs better ventilation?
Common signs are upstairs rooms that stay hot in summer, ice dams or long icicles along the gutters in winter, frost, damp spots or mold on the underside of the roof boards, a musty smell in the attic, and shingles that curl or blister years early. We check for all of these during a free inspection.
Can a roof vent cause a leak?
Yes. Cracked vent covers, worn rubber boots and lifted flashing around roof vents are common leak points. We replace the vent or its flashing and seal it properly, and we use an infrared camera to see how far any water has spread.
Is it best to fix ventilation when I replace my roof?
Yes, a roof replacement is the easiest and most affordable time. With the old shingles off, we can cut a continuous ridge vent and add or replace vents before the new roof goes on. Shingle manufacturers, including GAF, also require proper attic ventilation for full warranty coverage.
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.