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Tag: Flat roof

TPO or PVC: Which Low-Slope Membrane Is Right for Your Industrial Roof?

For property owners of warehouses, manufacturing facilities, or other industrial structures, the roof of your building isn’t just literal overhead, it’s one of the most critical components of the entire building.

Its success or failure can massively impact operations and profitability. And for the flat or low-slope roofs that dominate industrial construction, the material you choose matters enormously. Two of the most popular options – TPO (Thermoplastic Polyolefin) and PVC (Polyvinyl Chloride) – are all single-ply membrane systems, which is exactly why they’re so commonly confused. While they may look similar on the surface, they perform differently depending on your building’s environment, purpose and your priorities as a property owner. If you’re having a roof installed or replaced on an industrial structure, here’s what you need to know about these different membrane materials.

TPO (Thermoplastic Polyolefin)

TPO is one of the most widely installed low-slope membrane systems in the country, and for good reason. It’s a single-ply white reflective membrane that’s heat-welded at the seams, creating a watertight bond.

Benefits: TPO’s biggest selling point for industrial clients is its energy efficiency. The white reflective surface deflects UV rays and reduces cooling costs, which is a real advantage for large industrial buildings with significant roof square footage. It holds up well against punctures, tears, and impact, and the heat-welded seams are highly resistant to leaks over time. It’s also one of the more cost-effective options up front, making it a good value for large-scale projects.

Challenges: TPO is a relatively newer material compared to EPDM, so there’s less performance data, and the quality can vary between manufacturers. The key to using TPO is working with a contractor who sources from reputable brands and is familiar with the product.

Best for: Buildings where energy efficiency is a priority with large roof areas that are exposed to sunlight. Projects where budget and performance need to be balanced. It’s an excellent all-around choice for warehouses and distribution centers in climates like Hampton Roads where summer heat is a real factor.

PVC (Polyvinyl Chloride)

Like TPO, PVC membranes have a white reflective surface and heat-welded seams, but they offer the additional advantage of being chemical resistant. PVC has been used in industrial roofing since the 1960s and continues to be a popular option because of its performance in specific demanding environments.

Benefits: PVC’s resistance to chemicals, grease, animal fats, and industrial oils sets it apart from TPO. The heat-welded seams are as strong as TPO’s and like TPO, the white reflective surface helps manage heat and energy usage. PVC is also highly fire-resistant, which matters a lot in certain industrial settings.

Challenges: PVC carries a higher price point than TPO. Due to its formula, certain chemicals can leach out of the membrane over time, which will often cause it to become brittle if it’s not a high quality product. It can also be more sensitive to certain adhesives and solvents during installation.

Best for: Food processing facilities, restaurants, manufacturing plants that handle oils or chemicals, and any industrial application where roof exposure to chemical runoff or grease-laden exhaust is a real possibility. If your facility vents cooking oils, industrial solvents, or other chemical byproducts anywhere near the roof, PVC should be at the top of your list.

So How Do You Choose?

The honest answer both are good, solid systems when properly installed. The right choice depends on your specific building and how it’s used.

  • Choose TPO when energy efficiency, budget, and general performance are your priorities.
  • Choose PVC when your facility is exposed to chemicals, grease, or industrial byproducts that would compromise other membrane materials.

Andrews Roofing Can Help

At Andrews Roofing, we’ve been installing all three systems across industrial facilities in Hampton Roads for decades, and we’re happy to walk through which material makes the most sense for your facility, budget and priorities. Contact us for an estimate or inspection for a straight answer on what will deliver the best long-term return on your investment.

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Manufacturer Spotlight: Duro-Last Roofing

At Andrews Roofing, our priority is delivering top-notch roofing solutions to our commercial and residential clients in southeast Virginia.

A key aspect of our ability to do this consistently is our partnership with industry-leading manufacturers who provide reliable, high-quality materials. One of these partners is Duro-Last Roofing, known for their exceptional products that have revolutionized the commercial roofing industry.

Why Duro-Last Roofing?

Duro-Last Roofing has earned an excellent reputation for manufacturing custom-fabricated, single-ply roofing systems that offer unmatched durability and performance. Here’s why we choose Duro-Last for our commercial installations:

  • Custom-Fabricated Solutions: Duro-Last produces roofing systems tailored to the specific dimensions of each roof. This custom fabrication minimizes on-site modifications, reduces waste, and ensures a perfect fit, leading to faster installations and fewer potential leak points.
  • Durability and Longevity: Duro-Last roofs are built to last. With their high-quality PVC membrane, these roofs are resistant to chemicals, fire, punctures, and high winds, making them an ideal choice for commercial buildings in southeast Virginia’s varied climate.
  • Energy Efficiency: Duro-Last roofing systems are designed with energy efficiency in mind. Their reflective properties help reduce heat absorption, lowering cooling costs for building owners and contributing to a more sustainable environment.
  • Warranty: Duro-Last offers industry-leading warranties that provide peace of mind to our clients. Their comprehensive coverage ensures that your investment is protected for years to come.

Duro-Last Installations

Our team of skilled roofing professionals is highly experienced in installing Duro-Last roofing systems. We follow a particular process to ensure that every project meets the highest standards of quality and reliability.

We start with a thorough assessment of your commercial building to determine the most suitable Duro-Last solution. Our experts consider factors such as roof size, shape, and environmental conditions to create a customized plan.

Once a plan has been made for your specific needs, your Duro-Last materials are custom-fabricated, which makes our installation process efficient and precise. We focus on minimizing disruptions to your business operations while delivering a flawless roofing system.

After your installation is complete, we are available for ongoing maintenance and any necessary warranty claims work to ensure your Duro-Last roof continues to perform optimally throughout its lifespan.

Andrews Roofing Can Help

Choosing the right roofing material is crucial for the longevity and performance of your commercial building’s roof. We trust Duro-Last Roofing for their exceptional products that meet the highest standards of quality, durability, and energy efficiency. If you’re in need of a reliable roofing solution, contact us today to learn more about how Duro-Last can benefit your commercial property.

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Roofing 101: Steep Slope vs. Low Slope

All roofs can be divided into two categories: steep and low slope. Low slope roofs have become increasingly popular on residential structures thanks to their clean, modern design and their ability to accommodate patios, gardens and more.

It’s important to understand the difference between the two when determining what type of structure to install, replace or repair or when choosing appropriate roofing materials.

Steep Slope
Steep slope roofs are technically any roof with a slope of 25% or more. They consist of five basic components:

  1. Roof covering – this could be shingles, tile, slate, cedar shake, or metal, as well as the underlayment that sits beneath them to protect the sheathing from weather.
  2. Sheathing – this is the board or sheet materials that are directly attached to the roof rafters that make up the roofline. This material must be covered by an underlayment material and roofing material (above) in order to remain structurally sound.
  3. Roof structure refers to the rafters and trusses that are structurally supporting the roof sheathing. This is the framing of the roofline which is a part of the skeleton of the house.
  4. Flashing is usually sheet metal that is installed at any point on a roof where there are joints, valleys, vents or chimneys. They function to prevent water seepage at these vulnerable spots.
  5. Drainage is a critical component of the overall roof design. It ensures that water is shed from the roof in a way that doesn’t compromise the structure at any point. Drainage has to be considered when designing the layout, shape and slope of any roof structure.

Low Slope
For all intents and purposes, a “low slope” roof is usually flat, but technically it refers to any roof that is between 0% and 24% sloped. They also consist of the same five basic elements, but the details differ somewhat.

  1. Roof covering for low slope roofs often consist of a single-ply membrane such as TPO, E.P.D.M., Modified Bitumen, or PVC. It is also common to see what are called “built up systems” which are composed of multiple layers of sheet materials and asphalt, often covered with a gravel coating. Other material options include spray foam or metal. All materials require an underlayment between them and the roof sheathing.
  2. Sheathing for low slope roofs can differ quite a bit from steep slopes. There are some structures with basic wood boards like a residential structure, but you may also see metal, concrete, gypsum, tectum and other fibrous materials.
  3. Roof structures of a low slope roof are conceptually the same – rafters, trusses and joists that support the sheathing, but the materials here may differ as well and could be steel, wood, or concrete.
  4. Flashing does not differ much from a steep slope installation and serves the same purpose to prevent water seepage at vulnerable spots.
  5. Drainage for a low slope roof is critical since the basic design of it does not shed water the way a steep slope roof does. For low slope roofs with any sort of incline, gutters, internal drains and downspouts can be effective. For truly flat roofs, special design considerations need to be made, and options like stepped slope insulation may be a safer bet.

Either roof can have its challenges. Obviously steeper slopes are more difficult to access and for shingled steep roofs, they will have a harder time fighting gravity over time. Mansard shingled roofs, for example, sometimes have nails tear through the shingles as they age. On the other hand lower slopes that are “walkable” and shingled, but still have a slope that falls within the shingle manufacturer’s specifications for shingle installation, can present greater challenges with wind-driven rain getting under the shingles, debris accumulation, needing additional barriers for protection such as ice & water shield, etc.

Any solid roofing solution – whether it’s for a home or commercial building – should balance all five of these components. At Andrews Roofing, we address each of these components equally when consulting with clients and assessing roofing needs. While the roof covering may have the most visual impact, we understand that everything below that is just as critical. If you have questions about what type of roof is ideal for your structure, or if you need a steep or low slope roof repaired or replaced, contact Andrews Roofing. We have decades of experience in both commercial roofing and residential roofing construction in Hampton Roads and we’d be happy to come out and give you an estimate and professional recommendation.

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What’s the Difference Between a Shingle and Membrane Roof?

If you’ve been researching roofing repairs or replacements, you’ve probably come across several different roofing materials. The type of materials used for a roof depends on a lot of factors including the structure of the building, the building’s purpose and use, location, budget and local building codes. Two large categories of roofing materials are shingles and membranes. Both of these categories are made up of many different types of products and materials that are used for different purposes, so let’s dive in.

Steep Slope vs. Low Slope

The first factor in determining which of these two roofing methods will be used is whether the roof in question has a steep or low slope. Shingles are typically used on steep slope roofs, while membranes are used in flat or low slope roof situations. For the most part, membrane roofs are seen on industrial and commercial buildings, but can be found on residential properties as well, often as decks, over side and rear adjoining roofs. On residential properties, they are often found over sunrooms, utility rooms, or porches and can be used under decks and other walkable surfaces materials like pavers. Membrane roofs are quite common at waterfront properties and on new construction in the Hampton Roads/Tidewater area.

Types of Membrane Roofs

There are many different roofing membrane products on the market today, each with their own purposes and benefits. Below are four common flat and low slope roof membrane materials.

Thermoplastic polyolefin (TPO)

In the Mid-Atlantic region, TPO is becoming the low slope roofing standard. Because TPO is white, it is highly reflective, which means it’s efficient in keeping buildings cool. In fact, TPO roofs generally exceed the current energy efficiency standards and are a US Department of Energy, Energy Star rated roofing system, which some commercial structures may need to meet. TPO is also very durable thanks to its heat welded seams, and can last 20 to 30 years, making it a budget-conscious choice for businesses.

Ethylene Propylene Diene Terpolymer (EPDM)

EPDM is also a single ply membrane, but it is made of a rubber compound, rather than plastic like TPO. This material has been in commercial use for longer than TPO and has a strong reputation for durability. When properly installed, EPDM can easily last 30 years or more. However, if installed incorrectly or without proper maintenance, the adhesive treated seams can become vulnerable over the long term. Although EPDM roofs are usually black in color, meaning they are not as energy efficient as TPO, the material is 100% recyclable. There are also EPDM products that come in white, doubling their environmentally-friendly factor.

Polyvinyl Chloride (PVC)

PVC is a single ply membrane that is similar in appearance to TPO and is usually white, giving it similar energy efficient qualities. Other environmentally friendly aspects of PVC include its low petroleum content compared to TPO and EPDM. It’s also a recyclable material, even post-consumer, meaning it stays out of landfills. A PVC roofing system requires a slightly greater investment than that of a TPO roof, but it is also very durable and has a similar lifespan if installed and maintained correctly.

Modified Bitumen

The previous materials are almost exclusively used in industrial and commercial structures, but modified bitumen is perhaps the most common material for residential low slope roofs. It consists of five layers of asphalt that has had modifiers added to it to give it plastic or rubber-like properties. It is installed in large rolls and adhered with heat or with a factory applied self-adhesive. Modified Bitumen is designed to withstand very harsh environmental conditions, which makes it a good option for storm and heat prone areas of the Mid-Atlantic such as southeast Virginia.

Types of Shingle Roofs

Shingle roofs are seen on both commercial and residential structures, as long as the roof has a steep slope. There is a wide variety of shingle materials on the market designed for different purposes, styles and locations.

Asphalt Shingles

This is the most popular type of residential roofing material today. It’s also the most cost effective. Asphalt shingles consist of a fiberglass mat, top and bottom layers of asphalt, and mineral granules. There are three-tab shingles and architectural shingles, the latter being more costly but also more durable. Asphalt shingles are produced in a wide variety of colors to match myriad home styles and designs.

Synthetic Roofing

Whether they’re made to look like cedar shake, slate or any other type of upscale material, synthetic shingles are made with recycled materials and have a lower impact on the environment in part because of their lifespan which can be 40-60 years. These premium roofing systems should only be installed by roofing contractors who are experienced with these materials. They can be expensive, but their extended lifespan makes up for some of the upfront cost.

Wood Shingles & Shakes

Made from cedar, redwood, southern pine and other woods, these shingles are machine sawn or hand hewn. Some local building codes limit the use of wood shingles and shakes because of concerns about fire resistance, but there are certain wood shingle products that incorporate a factory-applied, fire-resistant treatment. These shingles are not often installed on a new structure or total roof replacement, but because of the age of some homes in the Tidewater region, wood shingles are often needed for repairs of older roofs or to maintain the design of a historic home.

Find an Expert

Whatever type of material you choose for your roof replacement, Andrews Roofing has experience with nearly all of them. If you’re not sure what the best material for your project is, please contact us to set up an appointment with one of our knowledgeable cost estimators. We can help you determine the most appropriate, durable and cost-effective roofing solution for your needs.

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The Importance of Roofing Certifications

Commercial roofing requires a specialized set of skills for long-lasting protection. Whether you’re looking for a contractor to install a new roof or provide prompt commercial repair services, find out why you should choose a contractor who is up to date with the latest certifications.

Quality Control

A certified contractor is an experienced contractor. Having certification proves that your prospective commercial roofing team has the skills and experience necessary to get the job done. From safety certifications to certified installers of particular roofing materials, each act as a quality control system to ensure you receive nothing but the best.

Variety of Services

Ask about the multiple certifications that a roofing contractor may have. Having a range of certifications typically means that they are qualified to perform a variety of tasks. From TPO repairs to emergency servicing of flat or traditional shingled roofs, certifications can indicate that a particular team is experienced in installing and repairing any roofing material you need.

Confident Warranty

Many roofing materials require a certified installation team in order to enjoy their generous warranty. Other contractors provide their own additional warranty as part of their commitment to excellence. Either way, a certified commercial roofing expert can offer you longer lasting, and more confident warranties to protect your commercial investment.

An uncertified contractor typically offers little to no warranty for their work, but they also may void any manufacturers’ warranties on the building materials. Be sure to ask about any relevant warranty before your roofing team begins their work.

Contact a Certified Commercial Service Today

For more information about a quality contractor in your area, contact Andrews Roofing by calling 757-296-0553 or sending an email today to learn more. Receive an estimate today and get started with your commercial roofing project quickly and professionally.

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How Good Communication Makes for a Better Roof

When it’s time to replace your roof, it’s important to choose a reliable company. You want a company that has the skills, equipment, and training to put a strong roof over your head. One important aspect of this is good communication skills. It’s possible that a roofing company can complete the job in a satisfactory manner without good communications, but even if this is the case you are likely to be frustrated. You could be unsure of the final cost, or the timeline for completion of the project. More likely, though, a good relationship with your roofing contractor will improve all aspects of the job, resulting in the roof you want for a fair price and finished in a timely fashion.

The Traits of Good Communication

You deserve a contractor that is available to answer any questions that arise before, during, and after the job. These important traits should inform all of your interactions with your contractor:

  • Regular discussions: These could come in the form of regular meetings or informal phone calls. These discussions keep you in the loop and let you know if any problems or complications have occurred. It also allows you to express any concerns about the progress of the job.
  • Good records: You should write down any important discussions you have with the crew or the supervisor, especially concerning the budget. Also, jot down any questions that occur to you, to ask the next time you speak with the contractor,
  • Mode of Communication: Let the contractor know which types of communication you prefer: email, phone calls, texts, or face-to-face talks.

The Hallmarks of a Strong Roof

Many factors go into getting a solid roof over your head. Good, regular communication is certainly an essential one. It keeps you informed about the progress of the job and answers your questions. Contact Andrews Roofing by calling 757-296-0553 or sending us an email to learn more about a trouble-free roof replacement.

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