Top 3 Roofers in Winter Haven, FL

Porch Pro Headshot RIG Construction & Roofing
RIG is proud to provide a high quality roof installation and roof repairs in the Central Florida area. When our highly trained employees take on your project you can trust that your roof is in the best hands and you can place your worry aside. No project is unimportant to us, whether it is simple re...Read more about RIG Construction & Roofing
2001 Havendale Blvd NW, Winter Haven, FL
Porch Pro Headshot Momentum Roof Services, LLC
Momentum Roof Services prides itself on customer service. We strive to be the best at what we do. We specialize in roofing repairs with more than 32 years of combined experience. Educating the customer and doing a great job for the clients is job one. We want them to be more than satisfied when we a...Read more about Momentum Roof Services, LLC
301 W State Road 434 Ste 337, Winter Springs, FL
Porch Pro Headshot Code Engineered Systems, Inc.
If you are a Tampa area homeowner, business owner, or manager looking for a Tampa roofer to install a new roof or fix a leaky roof then look no further. With over 40 years of roofing experience and thousands of quality roofs under our belts, you can be confident when hiring our roofing company to in...Read more about Code Engineered Systems, Inc.
8267 Causeway Blvd Ste E, Tampa, FL

More Roofers in Winter Haven, FL

Porch Pro Headshot Wooley Brothers Inc.
Roofers
1424 Hamlin Ave Unit J, Saint Cloud, FL
(40)
"I would like to thank Aaron Clevenger from Woolly Brothers inc. He provided great service along with exceptional work. I would reccomend this company to anyone looking to have their roof repaired. Great job guys"
1424 Hamlin Ave Unit J, Saint Cloud, FL
"I would like to thank Aaron Clevenger from Woolly Brothers inc. He provided great service along with exceptional work. I would reccomend this company to anyone looking to have their roof repaired. Great job guys"
Porch Pro Headshot SOLAR SHIELD INDUSTRIES, INC.
Roofers
4441 SE 53rd Ave, Ocala, FL
(23)
Solar Shield Industries, Inc. has been in business since 2000, providing homeowners all over the state with gorgeous, high-quality lifetime steel roofing systems. We have now expanded our offering to include fully insulated vinyl windows! Our goal is to provide A more complete energy efficient sol...Read more about SOLAR SHIELD INDUSTRIES, INC.
4441 SE 53rd Ave, Ocala, FL
Solar Shield Industries, Inc. has been in business since 2000, providing homeowners all over the state with gorgeous, high-quality lifetime steel roofing systems. We have now expanded our offering to include fully insulated vinyl windows! Our goal is to provide A more complete energy efficient sol...Read more about SOLAR SHIELD INDUSTRIES, INC.
Porch Pro Headshot Nationwide Roofing & GC LLC
Roofers
Serving area, Saint Cloud, FL
(16)
Our business is our livelihood but it is also so much more. Nationwide Roofing & GC LLC was started to fill in a void in the current market and to make a business that people can place their trust in. Over the years we have never lost our commitment to our clients and that is what has allowed us to ...Read more about Nationwide Roofing & GC LLC
Serving area, Saint Cloud, FL
Our business is our livelihood but it is also so much more. Nationwide Roofing & GC LLC was started to fill in a void in the current market and to make a business that people can place their trust in. Over the years we have never lost our commitment to our clients and that is what has allowed us to ...Read more about Nationwide Roofing & GC LLC
Porch Pro Headshot Salt Roofing
Roofers
801 David Walker Dr, Eustis, FL
(60)
Thank you for considering Salt Roofing. We are a locally owned company with over 40 years of industry experience. One of our founders has held a roofing license since 1978, so we know how to do it right. When you are comparing prices keep in mind our standard roofs are typically considered an upgrad...Read more about Salt Roofing
801 David Walker Dr, Eustis, FL
Thank you for considering Salt Roofing. We are a locally owned company with over 40 years of industry experience. One of our founders has held a roofing license since 1978, so we know how to do it right. When you are comparing prices keep in mind our standard roofs are typically considered an upgrad...Read more about Salt Roofing
Porch Pro Headshot Castle Roofing Group
Roofers
505 Suggs Rd Ste 200, Apopka, FL
(167)
505 Suggs Rd Ste 200, Apopka, FL
Porch Pro Headshot Green Roofing Technologies Inc.
Roofers
901 S Woodrow Wilson St, Plant City, FL
(6)
We take our customers' roofs very seriously. Our roofing company has over 20 years of experience and our staff is highly qualified and dedicated to building quality roofs. We price our products fairly and work hard to make sure that our customers get exactly the kind of roof they need. Every member...Read more about Green Roofing Technologies Inc.
901 S Woodrow Wilson St, Plant City, FL
We take our customers' roofs very seriously. Our roofing company has over 20 years of experience and our staff is highly qualified and dedicated to building quality roofs. We price our products fairly and work hard to make sure that our customers get exactly the kind of roof they need. Every member...Read more about Green Roofing Technologies Inc.
Porch Pro Headshot Max Service
Roofers
3480 Benson Park Blvd, Orlando, FL
(38)
At Max Service Air Conditioning and Heat, LLC, it is our mission to provide the highest quality of service in all aspects of our business. We are extremely thorough in services that we provide and aim to be very receptive to any client's issues, questions or concerns and handle them promptly and pro...Read more about Max Service
3480 Benson Park Blvd, Orlando, FL
At Max Service Air Conditioning and Heat, LLC, it is our mission to provide the highest quality of service in all aspects of our business. We are extremely thorough in services that we provide and aim to be very receptive to any client's issues, questions or concerns and handle them promptly and pro...Read more about Max Service

Frequently asked questions about roofers

In most cases, you can install metal roofing over shingles. There are some exceptions to this, largely depending on how damaged the roof is. Your roofer will ensure that your home can handle a metal roof structurally and that any issues present won’t be exacerbated. Metal is very strong, but also very light compared to other roofing options, such as asphalt. It can be installed directly overtop the existing shingles, meaning you’re going to save a lot of money leaving them in place. Because metal is light, it won’t significantly increase the load for your home to bear. These roofs last a long time, they reflect heat rather than absorb it, and can withstand whatever the weather throws at them.

When it comes to installation, a quick “roofers near me” search can find you a professional. The basic idea is that you are screwing the metal over top of your existing shingles. Begin with getting a precise measurement of the surface you’re covering. Valleys, dormers, and chimneys will affect how much metal you need. You’ll start with laying roofing felt over the entire roof. You want your felt to be straight and square. Some people use wood strips to assist them. Any seams where water can get into will require flashing. From here, put the panels in place. Keep them straight and symmetrical, and apply this to the screws as well. You’re going to have to cut the valleys by hand, so be precise in your measurements.

Use rubber or foam closure strips for any overlaps. Get some that match the shape and color of your roof. These prevent water damage. You also have the option of attaching rubber strips for plumbing vents. Once finished, attach the ridge cap. This gives the roof closure and prevents leaking. You can also use a mesh to create a ridge vent that allows airflow.

There are a number of options you can use when it comes to roof installation.

Shingles (asphalt, fiberglass, and composite) – Asphalt is the most common roofing you’ll see on modern homes. It’s relatively cheap compared to other options and can last up to 30 years. They come in a variety of color options, which are prone to fading over years of sun exposure. You can opt for architectural shingles, which are thicker and more weather resistant. You can also do three-tab shingles, which are quicker to install but are prone to wind damage.

Metal – This style of roofing has been around for longer than most people realize, and is gaining popularity. Zinc and aluminum are cheap, beautiful, and require very little maintenance. Metal roofing is highly durable and will last a long time. Improper installation will cause problems, and you may need soundproofing for the noise it can generate in a storm.

Wood – Wooden roofing can make for a cozy-looking home, and it lasts longer than shingles. While wood is beautiful, it comes with a higher maintenance cost, especially in areas prone to fire (where you’d need to specially treat the roof). Wood is best used in dry climates, as water, mildew, and mold are a problem for wood.

Clay – Clay may last for an entire lifetime and is extremely fire and wind-resistant. It’s been used for over 5000 years around the world and is still being used today. Clay doesn’t have many color options, and it can be heavy. It also may require specialized labor to install. It's great at regulating the temperature within a home.

Slate – Slate is a material that will last. It may not need replacing for nearly 200 years, is completely fireproof, and withstands winds and temperature extremes. Slate is expensive and heavy, much like clay, and may require extra structural support. Unlike clay, it has a wider variety of color options.

TPO stands for Thermoplastic Polyolefin. It’s a mostly recycled rubber material sold in rolls, which are held together by seams that stick due to the heat. TPO comes in rolls but is priced like any other roofing material. It is best suited for flat surfaces, which it was designed for. Homes with pitched roofs will want to avoid TPO. It's not designed to be attractive and must be installed in dry conditions, which is why it’s generally seen among commercial buildings. The quality of material in TPO can vary greatly between manufacturers, which leads to wide variations in pricing.

TPO has many good qualities as well. It’s a reflective material, which means you’ll save money on cooling and energy usage. It’s very simple to install, lightweight, and requires little maintenance. Since it’s made from recycled materials, this roofing also lowers your eco-footprint. This doesn’t quite paint the whole picture, as the materials needed to install TPO can add up fast. You’ll need insulation between your home and the TPO, which helps regulate heat. Depending on the thickness, this cost can be as much as the TPO itself. You’ll also need to add flashing to the seams and corners. Flashing prevents water leakage, and ranges wildly depending on your roof, such as whether you have peaks, dormers, or a chimney.

To attach TPO to your roof, you have three main options available to you. You can use glue to fasten the rubber to the underlayment, which is known as an attached roof. A fastened roof uses screws to hold itself down, and a ballasted roof uses rocks or pavers.

On average, your roof will cost roughly $8,600 to replace. The price varies based on the size of the home and what materials you want to use. When you receive a quote for a roof, you may be quoted based on square foot, or by square. They are different, with a square making up 100 square feet. Either way, the cost for labor is, on average, between $1.50 to $3.00 per square foot, or $150 to $300 per square.

Another factor that can raise the cost of a roof replacement is whether there is damage. If the roof is rotting, it’s not safe for a roofer to stand on it. Roofing companies will need to bring in equipment and fix the rotting, which will increase your costs. If you’re requiring the roof to be replaced under extreme weather conditions, this may alter your cost. If you have multiple layers of shingles, it may take more time (and therefore money) to remove them.

Material can account for 40% of the roofing cost. Asphalt can be as high as $5.50 per square foot. Metal, on the high side, can be $14, and clay or slate can go as high as $20 per square foot. Wood can go as high as $7 per square foot, but requires a lot of maintenance. Most people tend to go with asphalt, as it tends to last up to 30 years, and has a variety of colors to choose from.

If you’re going to replace the roof, and it's not an emergency, fall is the best season for the job. Autumn is a relatively dry season, and the weather is cooler.

There are benefits and disadvantages to any type of roofing. Asphalt is a common roofing material that comes in shingles. They’re an inexpensive option and straightforward to install. Metal comes in long sheets. It can be expensive to make and to install, but its seamless design is among the best available for roofing options. Metal is currently gaining in popularity, but that trend may not last. Rather, consider how it holds up in comparison.

Metal roofing is durable, and can withstand heat, water, wind, and hail. Once installed, it’s also quite easy to maintain. Because of its reflective nature, you can save energy costs in the summer, as metal will repel heat. Metal costs more to create and install, plus it’s heavier. If your home needs stability improvements to handle it, that won’t be cheap.

Asphalt is cheap to make, cheap to buy, and cheap to install. It’s relatively durable, though its longevity is only 50 years compared to metal’s 70 years or more. Asphalt has low snow retention, and extreme weather can harm it. It offers nothing in terms of energy savings.

If shingles need replacing, it’s a relatively straightforward job. You slide a new shingle in place and nail it down. Of course, anything on the roof is a safety hazard, so don’t take the job lightly. Metal roofs don’t need a lot of maintenance, but when they do, it’s a pain. If you use improper materials, it can cause the metal to corrode and create a bigger problem.

Both materials make for solid roofs. Asphalt has a few drawbacks, but is also the best for a tight budget. Metal costs more, but you gain durability, savings, and longer replacement costs. If you have the budget, you can decide if it's worth it.

Metal roofing is sold in squares, which are comprised of 100 square feet, and may also be called metal sheets. There are a variety of different metals you can choose from.

  • Steel roofs can come in two different types. The difference between the two types is what metal the steel is coated with. Galvanized is zinc, whereas galvalume is aluminum. Galvalume is cheaper and can go as high as $200 per sheet, whereas galvanized can go as high as $350.
  • Stainless steel is more durable and has a beautiful sheen to it. It’s considered a premium metal and is not a cheap option. It can run anywhere between $400 to $1,200 per sheet.
  • Tin roofs are a bit of a misnomer, as the actual material that comprises these roofs is called terne. This is steel coated with tin and can cost between $300 to $1,500 per square.
  • Aluminum is a cheaper option and can be recycled after you replace it. Compared to other options, it is a cheaper option at $600 per sheet on the high end.
  • Copper fades to a soft green over time and is highly durable. It can cost between $800 to $1,500 per sheet. It’s highly rust resistant and will have a long life.
  • Zinc is an attractive option that is available in both shingle style or standing steam to suit your aesthetic. Zinc usually runs between $600 to $1,000.

To install, metal roofing costs $3000 on average, though style, pitch, and coating can increase those costs. As always, size can play a factor as well. All the best roofing companies can break down your options for you and help you decide what the best option is for your specific circumstances.

Recent reviews for Winter Haven Roofing Contractors

105985

R.I.G is awesome 👍👍

- Anthony Sepulveda
105982

Awesome staff and amazing work! Highly recommend them!

- Tara Theiss
88701

The guy came out and did an estimate for roof repair and what it would cost to replace. Three phone calls later and three excuses later, I still have no estimate. If he didn't want to do the job, he should have said so.

- Glory Thomas
105983

RIG’s work ethic shines from the inside out! They have an awesome team to meet all your roofing needs. Highly recommended if your looking for a solid, dependable company!

- Kristin Tanksley
105981

Awesome company, great people, I highly recommend them.

- James Curtis
129562

Absolutely incredible company to work with. David, James, and the crew are honest, reliable, and trustworthy. They were able to save us money by recommending a repair over a replacement, as our roof had plenty of life left, just small damage from the hurr...

- TJ Alcock
105984

Excellent place to work

- Josh Childress
129720

Provided excellent, professional service. Will definitely use again and recommend to my friends

- Greg Wagner
164505

R&R roofing did work for me last month but did not deliver per the written contract. When confronted they promised to refund a portion of the $900 they charged me, to date I've not received anything. I'm hoping he will make good on his promise. Vince Spe...

- Vince Sperrazza
165651

Her's what I aid for that didn't happen. R&R Roofing agreed to a refund but to date no check in the mail. Look elsewhere 1, You failed to follow our written signed contract. 2, You did not provide the materials necessary per our contract. 3. Most of t...

- Vince Sperrazza
129746

Great job!! Fast service and true to estimate. Fully explained the issue and did not try to “oversell” what needed to be done

- Vicki Allen
157982

R&R Roofing is a scam. They did not deliver per our contract and when confronted with the issues he blew me off. A very personable guy and very believable up front .....but that's the fundamentals of all scammers. I got ripped off for $900 hope you're s...

- Vince Sperrazza

Everything You Need to Know About Winter Haven Roofers

Can I browse unscreened Roofing Contractors in Winter Haven?

We do our best to screen all of our roofing contractors. However, there are still some roofing contractor professionals in Winter Haven that have not been pre-screened. This means that their licenses may not be up to date to operate in Winter Haven or FL. Always be sure to pre-screen them yourself before hiring. Here are some unscreened professionals offering roofing services:

  • Century Roofing Specialist:
    • BBB Rating: A+
    • Active/Verified License: No, current status is inactive
  • ACC Builders & Roofers:
    • BBB Rating: A+
    • Active/Verified License: Yes, Current Status is Active
  • Johnson Roofing Orlando:
    • BBB Rating: A+
    • Active/Verified License: No, current status is inactive

How do I know that I found the right Roofing Contractor in Winter Haven for my roofing services project?

Finding the right roofing contractor for your project can be stressful.... when you don't search with Porch. We've pulled together everything you need to know about Roofing Services in Winter Haven so you can have some peace of mind before starting your project.

Here’s what you need to know to choose the right roofing contractor in Winter Haven:

  • Are they properly licensed? Winter Haven has 22 licensed Roofers Pros.
  • Are they BBB accredited? 22 pros in Winter Haven are.
  • Check if they are they BBB rated: 32 are A-rated in Winter Haven.
  • Is the quality worth the price? Make sure to find the roofing contractor that can deliver the quality you're looking for, without going way over your budget. Don't forget that every job is going to be different.
  • Speak with them over the phone: Contact multiple roofers pros to see if you’re on the same page when it comes to your project.

What should I check for once my Roofing Contractor in Winter Haven has finished working?

Every roofing services project is going to have different results, but here are a few things to check for once any roofing services company has told you they've finished the job:

  • Obviously you want to do a visual inspection. Even if you're unfamiliar with roofing services work, this gives you the opportunity to ask questions (even basic ones like, what did you do?).
  • Ask the roofing contractor to describe what they did. Whether your roofing services project was a repair job or a building job, have them run you through what was done.
  • Compare the description provided on your roofing services project estimate to the work completed. Did the professional do what was promised?
  • Request that the roofing contractor do a follow-up visit to check on the work. Most professionals are willing to do this, especially if you ask them.

All Roofers in Winter Haven, FL

Porch Pro Headshot Aluma-Tile Roofers  Inc.
Roofers
PO Box 468, Parrish, FL
(7)
Thank you for inquiring about our roofing systems. Aluma-Tile Roofers, Inc. specializes in aluminum shake shingles, architectual standing seam, metal barrel tile and also asphalt shingles. We are the local Classic Country Manor Shake installation dealer for the entire state of Florida, as well as,...Read more about Aluma-Tile Roofers Inc.
PO Box 468, Parrish, FL
Thank you for inquiring about our roofing systems. Aluma-Tile Roofers, Inc. specializes in aluminum shake shingles, architectual standing seam, metal barrel tile and also asphalt shingles. We are the local Classic Country Manor Shake installation dealer for the entire state of Florida, as well as,...Read more about Aluma-Tile Roofers Inc.
Porch Pro Headshot R & R Roof Services
Roofers
4245 Elwood Rd, Fort Myers, FL
(8)
Roof repair specialists. All types of tile, shingle, and flat roofing systems. We also do re roofs. Serving Florida since 1976. Family owned and operated. Free estimates
4245 Elwood Rd, Fort Myers, FL
Roof repair specialists. All types of tile, shingle, and flat roofing systems. We also do re roofs. Serving Florida since 1976. Family owned and operated. Free estimates
Porch Pro Headshot Exterior Roofing Professionals
Roofers
10905 Brittany Ln Apt 13, Tampa, FL
Here at Exterior roofing In Tampa, FL our team is very experienced, licensed as well as insured, and dedicated to making your roofing experience a success. When it comes to roofing, we offer different services for residential customers as when compared to commercial customers. For residential custo...Read more about Exterior Roofing Professionals
10905 Brittany Ln Apt 13, Tampa, FL
Here at Exterior roofing In Tampa, FL our team is very experienced, licensed as well as insured, and dedicated to making your roofing experience a success. When it comes to roofing, we offer different services for residential customers as when compared to commercial customers. For residential custo...Read more about Exterior Roofing Professionals
Porch Pro Headshot Champion Roofing & Contacting Inc.
Roofers
13123 E Emerald Coast Pkwy, Inlet Beach, FL
We have more than 30 years experience in the the roofing industry. Happy to be New on Porch. Champion Roofing & Contracting Inc. Licensed and insured. New Roofs Professional work at competitive pricing. Prompt & Friendly Service. Shingle Roofs Free estimates
13123 E Emerald Coast Pkwy, Inlet Beach, FL
We have more than 30 years experience in the the roofing industry. Happy to be New on Porch. Champion Roofing & Contracting Inc. Licensed and insured. New Roofs Professional work at competitive pricing. Prompt & Friendly Service. Shingle Roofs Free estimates
Porch Pro Headshot Franza Construction Inc.
Roofers
425 Diamond Acres Rd, Davenport, FL
(41)
"Amazing & fantastic service! 🎉👏😀 So happy with their assessment on my roof. I would highly recommend Franza to anyone with a roofing issue. They are honest and on time. One of the most truthful and reliable roofing companies I have dealt with. I will only go with them in the future."
425 Diamond Acres Rd, Davenport, FL
"Amazing & fantastic service! 🎉👏😀 So happy with their assessment on my roof. I would highly recommend Franza to anyone with a roofing issue. They are honest and on time. One of the most truthful and reliable roofing companies I have dealt with. I will only go with them in the future."
Porch Pro Headshot Manos Flat Roof Commercial
Roofers
Serves Winter Haven, Florida
Manos Flat Roof Commercial Ocoee, FL, 34761 (407) 460-1262 Manos Flat Roof Commercial has been in business for 11 years. We provide the most reliable commercial & residential flat roof repair services in the Ocoee FL 34761 area. Call us at (407) 460-1262 to make sure you are working with a reliable...Read more about Manos Flat Roof Commercial
Serves Winter Haven, Florida
Manos Flat Roof Commercial Ocoee, FL, 34761 (407) 460-1262 Manos Flat Roof Commercial has been in business for 11 years. We provide the most reliable commercial & residential flat roof repair services in the Ocoee FL 34761 area. Call us at (407) 460-1262 to make sure you are working with a reliable...Read more about Manos Flat Roof Commercial
Porch Pro Headshot Jet Contracting Group
Roofers
1970 Willow Wood Dr, Kissimmee, FL
1970 Willow Wood Dr, Kissimmee, FL
Porch Pro Headshot Marshall's Air Conditioning Of Lakeland
Roofers
3307 Backwoods Dr, Lakeland, FL
Marshalls LLC Air Conditioning and Roofing is a Florida licensed and insured contractor located in Lakeland Fl. We hold General, Roofing, and Air Conditioning state licenses and are able to provide these services in house. We have been servicing Lakeland since 1992. At Marshalls LLC in Lakeland Fl....Read more about Marshall's Air Conditioning Of Lakeland
3307 Backwoods Dr, Lakeland, FL
Marshalls LLC Air Conditioning and Roofing is a Florida licensed and insured contractor located in Lakeland Fl. We hold General, Roofing, and Air Conditioning state licenses and are able to provide these services in house. We have been servicing Lakeland since 1992. At Marshalls LLC in Lakeland Fl....Read more about Marshall's Air Conditioning Of Lakeland
Porch Pro Headshot Certified Roofers Contractors
Roofers
Serves Winter Haven, Florida
(78)
Serves Winter Haven, Florida
Porch Pro Headshot P.V.A Construction Managers, LLC.
Roofers
409 N Monroe St, Albany, GA
(2)
P.V.A Construction Managers, L.L.C. is a dynamic, progressive company that provides construction management and general contracting services for industrial, institutional, commercial and hi-tech businesses up to the $7.5 million range. Based in Georgia, we offer general contracting, operations and m...Read more about P.V.A Construction Managers, LLC.
409 N Monroe St, Albany, GA
P.V.A Construction Managers, L.L.C. is a dynamic, progressive company that provides construction management and general contracting services for industrial, institutional, commercial and hi-tech businesses up to the $7.5 million range. Based in Georgia, we offer general contracting, operations and m...Read more about P.V.A Construction Managers, LLC.
Porch Pro Headshot Cristo Roofing & Construction
Roofers
9138 Integra Meadows Dr Apt 112, Davenport, FL
Cristo Roofing & Construction is dedicated to serving you in the most professional manner we won't stop until you are completely satisfied with the work provided. God bless you -Joseph
9138 Integra Meadows Dr Apt 112, Davenport, FL
Cristo Roofing & Construction is dedicated to serving you in the most professional manner we won't stop until you are completely satisfied with the work provided. God bless you -Joseph
Porch Pro Headshot B.Linzy
Roofers
Serves Winter Haven, Florida
(1)
Log home chinking, staining & painting of all types
Serves Winter Haven, Florida
Log home chinking, staining & painting of all types
Porch Pro Headshot O.J's Home Repair
Roofers
4146 Vista del Lago Dr, Winter Haven, FL
Hello My Name is Omy Calderon . My wife and I are the owners of this small General Contracting company . We provide a lot of reasonable prices . we are available 24/7 413-218-3595 413-517-7958
4146 Vista del Lago Dr, Winter Haven, FL
Hello My Name is Omy Calderon . My wife and I are the owners of this small General Contracting company . We provide a lot of reasonable prices . we are available 24/7 413-218-3595 413-517-7958

Latest projects near Winter Haven

Recent projects booked on Porch
Cypress Gardens 33884
Roofing
Start Date
I'm flexible
Roofing project type
Redo soffits around house and repairs
Winter Haven 33881
Roofing
Start Date
Within a month
Roofing project type
Install a solar gable vent fan