Roofing Contractor in Western NY and Northern PA

A new roof on a new build or an addition has to be planned with the rest of the structure, not after it. We handles framing, siding, and interior work too, so the roof goes on as part of the whole project instead of as a separate trade working around everyone else.

On an addition, the hardest part is where the new roof meets the old one. That tie-in is where leaks can start. Mitchell Dossey Contracting matches pitch, shingles, and flashing so the new section sheds water the same way the original roof does.

What’s Included in Our Roofing Installation Services

• New Construction Roofing – We work with homeowners and builders to install the full roof system on new homes, garages, and outbuildings, from the deck to the ridge cap.
• Additions and Roof Tie-Ins – New roof sections are joined to the existing roof with matched pitch, woven or cut valleys, and step flashing where the new wall meets the old roofline.
• Underlayment and Attic Ventilation Systems – Underlayment goes down before any shingles. Intake vents at the soffits and exhaust at the ridge let the attic breathe, which cuts down on moisture, mold, and ice dams.
• Flashing, Drip Edge, and Ridge Vent Installation – Flashing seals the spots where the roof meets chimneys, skylights, and walls. Drip edge keeps water off the fascia. Ridge vents let warm, damp air out of the attic.

Even a small leak can lead to water damage, mold, and costly structural repairs if it’s left unaddressed. A damaged roof is a problem that only gets worse, and more costly to repair. Don’t wait to address roofing issues caused by storms, severe weather, or age.

Since 2013, we’ve provided responsive roof repair services across the Jamestown area, the southern tier, and into Warren, PA, so problems get fixed before they become bigger ones.

Common Roof Repairs We Handle

• Storm Damage Roof Repair – High winds and heavy snow can lift shingles, crack flashing, and drop limbs onto the roof. We check the whole roof after a storm, tarp any open areas to stop water getting in, then makes the permanent repair.
• Leak Detection and Sealing – Not every leak is obvious. We find the source, whether that’s a failed seal, damaged underlayment, or a compromised penetration. Then we fix it properly so it doesn’t come back.
• Shingle Replacement – Missing, cracked, or curling shingles leave your roof vulnerable. We replace damaged shingles and assess surrounding areas to make sure the repair holds.
• Flashing and Chimney Repair – Flashing failures around chimneys, vents, and roof transitions are among the most common causes of leaks. We reseal and replace flashing to restore a watertight barrier where your roof meets other surfaces.
• Ice Dam Prevention – Western New York winters are hard on roofs. Ice dams form when heat escapes through the attic and melts snow at the roof’s surface. Water backs up under shingles and works its way inside. We address the underlying ventilation and insulation issues that prevent ice dams from forming in the first place.

Once a roof passes 20 years, repairs tend to come closer together. If shingles are failing across the whole roof, or storm damage is widespread, replacing it usually costs less over time than patching it every season.

We handle complete roof replacements for homeowners across Western NY and Northern PA, from initial assessment through final cleanup.

Roof Replacement Services

• Full Tear-Off and Debris Removal – Every layer of old shingles and underlayment comes off, down to the roof deck. You get a clean start, not a patch job layered over old problems.
• Decking Installation and Repair – With the deck exposed, we check for rot, soft spots, and gaps. Many older homes in the area still have board decking instead of plywood. Damaged boards get replaced before anything goes back on.
• Ice and Water Shield and Underlayment – Ice and water shield goes along the eaves and valleys, where ice dams and runoff do the most damage. Synthetic underlayment covers the rest of the deck.
• New High-Performance Roofing System – We install durable, high-quality materials selected for our region’s climate. Shingles, flashing, drip edge, and vents go on as one system. Chimney and wall flashing are replaced, not reused.
• Clean, Timely Completion – We respect your time and your property. That means showing up when we say we will, keeping the work area clean throughout the project, and finishing on schedule with minimal disruption to your household.