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  • Average homeowner rating star icon4.7
    Average homeowner rating
  • Verified reviews icon802
    Verified roofing services reviews

Top-Rated Roofers in Whippany - Updated Nov 2026

Avatar for 1 ALL AMERICAN ROOFING LLC
1 ALL AMERICAN ROOFING LLC
5.0(
208
)
Asphalt Shingle Roofing - Repair

Serving Whippany, NJ and surrounding areas

Approved

In business since 2001

Free estimates

Credit card accepted

We invite you to experience a tradition of customer satisfaction that will exceed your greatest expectations. Our professionalism and quality workmanship will accurately reflect your taste and lifestyle. From conception to completion, we work with you until the job is done. We are ethical, honest, and easy to communicate with. \n \nCall us today you'll be pleased you did. Thank you \n

Recommended by99%of homeowners
Avatar for George J Keller & Sons LLC
George J Keller & Sons LLC
4.4(
262
)
Asphalt Shingle Roofing - Install or ReplaceAsphalt Shingle Roofing - Install or Replace - For BusinessAsphalt Shingle Roofing - Repair+26 more

Serving Whippany, NJ and surrounding areas

Approved

In business since 1980

Free estimates

Warranties offered

"Roof was 25 years old and was due for replacement. I also had old LP fiberboard siding that needed replacing in some sections mainly the chimneys. The rest was ok and I couldn't see spending the money to replace it all. George Keller did a terrific job on the roof and worked with me to match the LP siding using James Hardie siding. Carl the estimator took his time gave me a detailed estimate with pictures showing all the sections of siding that would be replaced. George Keller had done other houses in our neighborhood and one neighbor, an architect, used them, so that speaks to their reputation. I would highly recommend them. They are very efficient and neat and will finish your job in a day or two."
Green With Envy
Modern Farmhouse
Metal Roofing
Green With Envy
Modern Farmhouse

+41

Response time12 hrs
1 neighbors recently requested a quote
Recommended by90%of homeowners
Avatar for Skyline Construction Group
Skyline Construction Group
4.9(
84
)
Asphalt Shingle Roofing - RepairAsphalt Shingle Roofing - Repair - For BusinessFlat, Foam or Single Ply Roofing - Repair+3 more

Serving Whippany, NJ and surrounding areas

Approved

In business since 2011

Free estimates

Emergency services offered

"contacted the roofing company for a quote on a new roof,from the first meeting with gary to the end result the work was completed on time and to a very high standard.if your looking for a professional roofing company then gary and his team at Skyline Construction Group."
Response time10 hrs
Response rate93%
3 neighbors recently requested a quote
Avatar for Monarch Roofing LLC
Monarch Roofing LLC
5.0(
198
)
Asphalt Shingle Roofing - Repair

Serving Whippany, NJ and surrounding areas

Approved

Super Service Award Winner

In business since 2021

Free estimates

Emergency services offered

"I was most satisfied with the job quality for our replacement roof. Thanks a lot Monarch Roofing team. I will definitely call you again for any roofing and masonry needs."
Response time11 hrs
2 neighbors recently requested a quote
Recommended by97%of homeowners
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Showing 1-10 of 1446
Roofing FAQs, answered by experts

A roof replacement can take anywhere from one to 14 days. For most homes, a full replacement that includes tearing off old materials takes about one to two days, though the average project can last up to 12 days. The exact timeline depends on several factors, including the roof's size and complexity, the type of roofing material, the crew size, and weather conditions. Certain materials take longer to install; for example, metal roofs can take seven to 14 days because the material is more difficult to work with than asphalt shingles, wood, or tile. A re-roofing project, where new shingles are installed over old ones, can take half the time or less. It's also important to factor in the time needed to obtain necessary permits. A professional roofing contractor will typically complete the job faster than a DIY approach.

You can replace a roof in the winter, though it’s not the most popular time to do so. The biggest drawback of winter roofing work is the weather. Snow and ice make for dangerous, slippery working conditions. Plus, shingles can only be installed in temperatures above 40 to 45 degrees. 

The best time to replace a roof is in the spring or fall when the weather is mild. However, you can likely save some money by booking the job in the winter off-season, when roofers have more availability. 

Building code allows 24-inch on-center spacing for roof trusses. However, you can install them on 12- or 16-inch centers to handle large loads or other exceptional circumstances. In cases such as covering a wide span or supporting alternative roofing materials, where a structural engineer needs to evaluate or create a design for your trusses, the plans will indicate the spacing. 

You’re going to need a permit for nearly every roof-raising project. This is a very important step, as the work you’re doing has serious safety considerations. Professionals are the ones to handle this type of work—including sourcing the permits—as they have the expertise required to perform the work safely. Insurance and warranty are usually voided if you do this work without a permit, and you may even be required to halt construction and tear it down as a penalty for working without a building permit.

Roofing estimates and inspections are not the same thing. Roofing inspections (whether done with a drone or by the traditional method) help you find any damage or defects on a roof. You will pay a set fee for a roofing inspection and use it to get certification or to determine whether repair or replacement is necessary. Beware of unsolicited contractors coming to your home and offering a so-called free roof inspection—these are often scams.

Roofing estimates, on the other hand, are typically free and offered by a roofing company hoping to earn your business. Some roofing estimates are performed with drones, while other companies will still opt to send people up onto the roof. Either way, the estimate is for roof repair or replacement costs the company wants you to hire them for.

The Whippany, NJ homeowners’ guide to roofing services

From average costs to expert advice, get all the answers you need to get your job done.