Posts

Low Roof Pitch Options for Your Building

A roof has a “low pitch” if it slopes anywhere from 2/12 to 4/12 inches—meaning that for every foot the roof extends horizontally, the level of the roof rises two to four vertical inches. Some roofs have extremely low slopes and appear to be nearly flat. No roof, of course, should actually be completely flat. If it is, puddles of water will accumulate on the roof and ultimately damage it.

Low-slope roofs are seen on both commercial and residential buildings, although they are primarily associated with businesses. There is a reason for this: in commercial buildings, it is generally considered more prudent to maximize the use of space, leading to a flatter roof. Residential homes, on the other hand, tend to have a much steeper incline for cosmetic reasons.

Regardless of whether you’re looking for low roof pitch options for your home or your place of business, you’ll need to consider what materials are best. In this article, we’ll take a look at the choices available to you and other variables to consider when putting in a roof.

The Trouble with Low Roof Pitch

The primary advantage of a low roof pitch is maximizing space. It will allow you to utilize the space in your area all the way up to the top. This can create a number of advantages. Heating and cooling are easier in a building with a flatter roof, for example. However, low-slope roofs come with disadvantages that don’t trouble steeper roofs. The primary problem with a low slope has to do with drainage: water damages roofs, and water can begin to pool on a roof with too low of a slope. Ice and snow can also be a problem, depending on the climate. If water accumulates on your roof and can’t drain properly, it will eventually cause decay.

Direct sunlight can be another problem for a low-pitch roof, although this is certainly not an issue unique to these types of roofs. In fact, ultraviolet light can do a number on any type of roof, unless the proper materials are used.

This brings us to the primary disadvantage of a low slope roof: you are somewhat limited in the materials you can use to construct them. This is because of the importance of waterproofing. On a roof with a higher pitch, water will easily roll off, and that means you don’t need to concern yourself as much with waterproof materials. A low-pitch roof, on the other hand, absolutely must be waterproofed.

Waterproofing

Low-pitch roofs are usually waterproofed through the use of a roof membrane, which can be made from synthetic rubber, a thermoplastic such as PVC, or modified bitumen. Any of these materials can effectively carry water off the roof without allowing it to pool anywhere or penetrate vulnerable areas and cause damage. Occasionally, asphalt roofing systems are also still in use, and while these types of roofs were extremely common in the past, they’ve largely been supplanted by synthetic membranes. This is because asphalt roofs don’t seal as effectively as other membranes do.

Types of Low-Pitch Roofs

There are several options when having a low-pitch roof installed for your building. These options, however, are more limited than those for a gable roof or other higher-pitch roof. Even so, there are several choices you can make as far as the construction of your roof, each with its own set of pros and cons.

Shingles

Asphalt shingles are, as their name suggests, shingles made from asphalt and layered on your roof over felt, a synthetic underlayment, or thicker “ice and water shield”–type membrane. Shingles can be a controversial option for a low-slope roof. Most manufacturers allow shingles on slopes of 2/12 and greater, but most roofing contractors insist on greater slopes, as shingles aren’t “waterproof” but water shedding. Shingles are popular primarily because of their relatively low cost, ease of installation, and aesthetic benefits. However, installing shingles on a low-slope roof might be asking for problems. Consult a professional roofing contractor with many years of experience.

Single-Ply Membranes

Unlike with other roofing systems, where the material is built up over the membrane or layered on top of other materials, single-ply membranes are installed without the help of other layers. A thermoset or thermoplastic membrane is laid across the surface of the roof (generally over rigid insulation) and hot-air welded together. The most popular materials for single-ply membranes are PVC and TPO, which are usually reinforced with the addition of polyester or fiberglass. Single-ply membranes are a great, relatively inexpensive option that’s easy to install. However, because they’re only one layer, maintenance is critical.

Torch Down Roofing

This roofing system is made from sheets of modified bitumen—a hydrocarbon-based material—which is then sealed to the surface of the roof through the use of a handheld propane torch. The seams of the bitumen will melt and fuse together as a result of the welding process, creating seams that are completely waterproof.

This roofing material is great if you live in a particularly harsh climate. While other materials may expand or contract if the weather is hot or cold, modified bitumen will not. This material also has a long life span and is easy to repair, though it can be extremely difficult to install due to the use of the torch. As most of the roof decks in the Pacific Northwest are made of wood, the risk of fire should be a significant consideration. Only use a contractor with the CERTA certification.

Coated Roofs

For commercial buildings, one of the other popular low-pitch roof options is coated metal. Metal roofs aren’t waterproof in and of themselves, but they can be treated with a coating that makes them so. This coating helps reduce the instances of rust, increasing the life span of the roof. Generally, the coating that’s applied is a fluoropolymer paint, which allows the metal roof to become resistant to water and ultraviolet radiation. This option, of course, isn’t practical for commercial buildings that don’t have metal roofs.

If you’d like to discuss roofing options for your building, contact the professionals at Interstate Roofing. We’ve been serving Pacific Northwest for over 20 years and are always ready to share our expertise.

5 Things to Know About Commercial Flat Roof Repair

Whether or not you have experience with roofing projects, you’re probably aware that the flat roof of a commercial building must be handled differently than other types of roofs. It’s precisely because the roofs of most commercial buildings are flat that they have different needs, in maintenance, care, and of course, repair. While in some cases, it can be easier to deal with a commercial roof, in others, it can be significantly more challenging. Here are five of the most important things you should know before beginning any commercial flat roof repair:

Understand Why Your Roof Is Flat

Many people don’t give any consideration to why commercial buildings usually have flat roofs, but have you ever thought about it? What benefits does a flat roof provide to the owner of a building? Why do almost all commercial buildings make use of them, from grocery stores to factories to hospitals? While the majority of residential buildings have sloped roofing.

As you may suspect, the primary reason is cost-effectiveness, however, there is a lot more to it. Building a sloped roof requires a lot more materials, which can be an unnecessary expenditure when your building is required to be practical but not flashy. There’s also another practical reason for commercial buildings to have flat roofs: in many municipalities, there are height restrictions on buildings. You can maximize the space available to you if you simply keep your roof flat. There’s an aesthetic element to all of this as well: try to picture your local grocery store trying to pull off a sloped roof!

It should be noted that a flat roof is never completely flat. There always has to be at least a slight slant to it to allow for proper water drainage.

Know the Different Types of Commercial Flat Roofs

When you’re constructing a commercial building, it’s not as simple as just ordering a “commercial flat roof.” Actually, there are several types of flat roofs that you can consider. Which one you choose depends on your budget and requirements, but no matter which, you’ll have to consider things like drainage and UV protection. Here are a few of the options available to you:

Built-Up Roof System (BUR)

Also known as the “tar and gravel” roof by some, the built-up roof system was one of the most common types of commercial flat roofs for decades. This particular style of roof is one of the oldest types of roofing still in common use, and its continued popularity speaks to its effectiveness and durability. The name “built-up roof” comes from the fact that this type of roof is literally “built up” out of layers of tar and asphalt paper. The layers of roofing material are then reinforced with fiberglass matting. Finally, another thin layer of tar is added to the top of the roof, which is then covered by a layer of aggregate stone.

Advantages of this particular roofing system include durability—these types of roof can last for up to 50 years with proper maintenance—but the chief disadvantage is cost and fumes. Because it requires many hours of labor, this is one of the most expensive flat commercial roofing systems to install.

Metal Panel Roof System

If you’re looking to save on costs, a metal panel roof system may be the choice you should make. It is very simple in its design: metal panels with a special sealant between the joints and a neoprene seal anywhere there are washers in place. These roofs are cheap and have a relatively short lifespan, and so they are usually only used for warehouses and factories.

Single Ply

A relatively new product to the industry, single ply has quickly become one of the most popular choices. The synthetic membrane is applied in a single layer, is flexible and lightweight, and is UV resistant. Single-ply roofing is fairly economical to install, depending on the type of membrane used and preparation needed. It has a comparable lifespan, depending on millimeter thickness used.

Understand Your Warranty

Most commercial roofs are under some type of warranty after they’re constructed. Your warranty can last anywhere from 5 years all the way up to 20 years. If your roof is still under warranty, you won’t have to worry about repair for most minor issues: it will be covered. Other, larger issues, and certain unusual circumstances, may not be covered. If you are in an older building, it may also not be covered. Do some research on, and try to understand, the warranty that covers your roof (if you have one).

Fixing Minor Issues

Now that you have some awareness of different types—and the purpose—of commercial flat roofs, let’s discuss some of the more common minor issues. Both residential and commercial roofs are prone to leaks, and even the most sophisticated roofing technology occasionally requires repair. In some cases, you’ll be able to fix problems yourself. Under most circumstances, however, you’ll want to seek out the services of a qualified professional.

One common example of a problem with a commercial flat roof is a leak. If you have noticed a leak in the roof of your building, the first thing you must do is locate it. Doing so can be relatively easy, or difficult, depending on where the leak is located. Try to tape off an area about two feet around in either direction from where the dripping is coming from. Once you have done that, you can search the roof for any signs of damage. Occasionally, you’ll easily find an obvious hole. However, more commonly, you’ll need to call a professional to help locate the leak for you. Contact a professional at Interstate Roofing if you are having trouble finding the source of your leak.

Finding a Qualified Professional Roofer

With most elements of commercial flat roof repair, you’ll need to find a competent professional to do the job for you. Finding one involves a fair amount of research. While there are many roof service professionals out there, choosing the right one involves a little homework. Read online reviews, check references, and talk to other satisfied customers. You will also want to check what, if any, certifications your prospective roofer has.

If you are in the Portland area, Interstate Roofing is your best option. They have earned the highest possible certification level from GAF, which is the largest roofing manufacturer in North America. This status, combined with their other awards and years of experience, make them a top choice for commercial flat roof repair in and around Portland, Oregon.

5 Questions to Ask When Looking for Commercial Roofing in Vancouver, WA

When it comes to commercial roofing, you don’t want to skimp. A sturdy roof is one of the most important aspects of any building, and especially of one that is being used by a wide array of people. Because of this, it’s important to hire a roofing company that knows what it is doing.

Commercial roofing takes a specialized skill set, and you must ensure the company you’re hiring encompasses all of these skills. Additionally, if you’re looking for commercial roofing in Vancouver, WA, particularly, you want to make sure that the company you choose knows the area and has experience working in it.

It is important to be assured of certain things before you commit to a particular company. Here are five questions to ask when looking for commercial roofing in Vancouver, WA.

Are you licensed and insured?

This may seem like common sense, but it’s important to ask. In Washington State, all general and specialty contractors must register with the Department of Labor & Industries. You don’t want to commit to a roofing company only to find out that they aren’t registered, as this could get you into trouble with the state. For further confirmation, ask for proof of the license.

In terms of being insured, this is also something you need to ask for proof of. Be sure to ask what type of insurance the contractor has. You want a company that has both workers’ comp and general liability insurance. If an employee is injured on your property, you don’t want to be liable for the medical bills.

Furthermore, if any damage happens to your property while the work is being done, you don’t want to be liable for that either. So it’s important to be sure the company has general liability insurance. Accidents happen, and it’s important to confirm that the roofing company you are in talks with has the proper protection.

What types of commercial roofs have you worked on previously?

Not all roofs are the same. For instance, the roof on an office building is not the same as the roof found on a church. Working on a roof that is low-sloped can involve a different skill set than working on a roof that is steep. Because of this, it’s important to choose a contractor who has experience working on the type of roof that is found on your property. This will help ensure you’re getting the best quality work possible on your roof, in turn, giving you better, longer lasting results.

At Interstate Roofing, we know how important this is. We have been replacing the roofs on churches, office buildings, medical complexes, restaurants, warehouses, and multi-family structures since 1988. We are the commercial roofing experts in Vancouver, WA, and we have the skills and expertise to protect your commercial property.

What is your projected timeline?

In terms of logistics and your budget (assuming there is one), it’s important to know how long repairs or installation of a new roof will take. Work being done on the roof will have at least some disruptive effect on your everyday business practices. If you can’t operate your normal business because of the roof repair, you will obviously need to know how many days you’ll be closed so you can alert employees, customers, clients, or residents accordingly.

It’s also important to make sure you aren’t liable for any extra costs if the timeline goes beyond the expected end date. Furthermore, ask about potential weather delays and how that might impact the timeline. A roofing company with experience will account for weather delays when providing you with their timeline.

In case of bad weather, what do you do?

It’s no secret that it rains in Washington, which is why asking how a roofing company handles this is critical. You don’t want a company that doesn’t properly shield its work from the rain, resulting in even more damage to your business.

Ask the contractor if they use plastic sheeting or tarpaulin to protect the roof in bad weather. If the answer is no, ask what other weather-proof materials they plan to use to keep your property safe while they’re working on the roof.

Additionally, be sure to ask about the contractor’s plan if there’s rain for consecutive days and/or if there are high winds. Will the contractor regularly check your property to ensure the protective covering is working and that everything is dry? Make sure you know from the get-go whether this is something you’ll be responsible for.

What is the warranty on the new roof?

We understand that you’re doing roof work now in hopes of not having to do further work for a while. If you hire a professional, experienced roofing company that does high-quality work, this should be the case, barring damage caused by an extreme storm or natural disaster.

However, as we all know, accidents happen, and nothing is perfect. Because of this, obtaining a warranty on the work done is important. If something does happen and repair is necessary, you don’t want to have to pay another large amount to get it fixed.

It’s important to choose a commercial roofing company that you can trust. Finding one with both experience with the type of roof on your commercial property and experience working in the Vancouver, WA, area helps ensure you’re getting the best possible service done.

At Interstate Roofing, we’re proud to have the skill sets needed for many diverse roofs, as well as knowledge of the Vancouver area. We’re happy to chat more about your specific roof and provide you with a free estimate. Please reach out to us so we can make sure the roof on your commercial property is top notch!

When Should You Reach Out to a Commercial Roofing Specialist

Let’s admit it; there are times when we all feel like the roof is caving in around us. Sometimes it’s because we’re a little stressed. But other times it’s because the roof is literally about to fall! Don’t let it get to that point, though. There are things you can look out for and signals that your roof is sending you to help you know when it’s time to call a commercial roofing specialist.

Here are some common examples of when it’s time to call in the experts.

Installation

You should certainly call a commercial roofing specialist when you need a commercial roof installed. This isn’t something you should tackle as a do-it-yourself project. Instead, hire a trusted contractor to do the work. A lot of commercial roof problems are caused by improper installation. A sealant problem, for instance, could cause water to seep into your building. But just as some issues are caused by improper installation, many problems can also be prevented when a skilled contractor performs the installation work.

How do you know which contractor to hire when looking for a commercial roofing specialist? Look for companies that are experienced in the field and have built themselves a solid reputation. Interstate Roofing has been in business for three decades. We have an A+ rating with the Better Business Bureau and our customers rave about us. You’ll want your commercial roofing specialist to be able to say the same.

Roof Replacement

Just as you should call a commercial roofing specialist to properly install your roof, you’ll also want to contact a commercial roofing specialist when your roof reaches the end of its lifespan. It’s incredibly important that as a roof ages you have your roofing specialist perform regular maintenance.

Getting an expert opinion is also imperative as a roof ages because a professional will be able to assess when a roof is beyond repair and it’s time for a replacement. Seemingly minor issues that go unaddressed can lead to bigger problems down the line, potentially wreaking havoc on your entire commercial building. Keep reading to learn more about common commercial roofing problems that are signs it’s time to call in an expert.

Poor Drainage

Without proper drainage, moisture from rain and snow will have nowhere to go and will eventually accumulate on the surface of your roof. Anytime you have standing water on your roof, you’re almost guaranteed to have a problem.

Water weighs about five pounds per inch, per square foot. That means the extra weight of the water will cause undue stress to your roof, causing it to sag or even collapse. But there’s no reason it should get to that point.

Make sure you have a proper drainage system in place. If you don’t, contact your commercial roofing specialist immediately to have it fixed. And always be on the lookout for any water that’s pooling on the surface. This a clear sign that you need to contact your commercial roofing specialist.

Puncture Holes

Weather and environmental factors can cause significant harm to a roof, which is why it’s important that your roof is regularly inspected for any visible signs of damage. Puncture holes can be caused by severe weather, such as hail or high winds, but can also be caused by foot traffic. A careless technician working on your roof, for example, or wild animals can also cause puncture holes.

Flat roofs are more prone to puncture holes than sloping roofs, but there are certain things you can do to prevent this. For instance, since debris, such as branches, may cause puncture holes, be sure to trim back any tree limbs. Also, make sure to thoroughly vet anyone who will need to access your roof to perform work. You can also install walkway pads to protect your roof from foot traffic.

If you notice any puncture holes, contact a commercial roofing specialist to address the problem since these holes can cause leaks and decrease the overall efficiency of your roof.

Flashing Issues

Flashing is the material, typically steel or another type of metal, that’s used in certain areas of your roof, such as the valleys and base of chimneys, to keep water from seeping in. When your flashing is faulty, it can cause leaks and lead to other types of issues. Extreme weather is a common cause of deterioration. Scorching temperatures, for instance, can cause your roof to expand and contract, altering the shape of your flashing.

It’s important then to inspect your flashing from time to time to make sure there are no signs of wear and tear. If you do notice something amiss, contact your commercial roofing specialist. Flashing issues are relatively common and can often be easily fixed.

Blow-Offs

Like many other commercial roof problems, blow-offs are caused by extreme weather, specifically high winds which can cause the roof to uplift. The corners and edges of the roof are particularly susceptible to the pressure of high winds. Though the damage may initially be minor, over time, high winds will cause the roof to continue to rise and even potentially blow-off. That’s why it’s important to inspect your roof after extreme weather conditions and contact a commercial roofing specialist if you notice any issues.

A commercial roof requires special expertise. Attempting to perform the work yourself or hiring an inexperienced contractor could lead to much bigger problems. That’s why you should only allow trusted commercial roofing specialists to perform maintenance and repair work.

At Interstate Roofing, we have been working on the roofs of all types of commercial buildings for the past three decades. We have the requisite skill and expertise to address any commercial roofing issues you have and want to make sure you keep a roof over your head. Contact us as we know exactly how to do that.

Boosting Business With Quality Roof Design

How professional roof installation can benefit your company.

Did you know that the roof on your commercial property can have a direct impact on business? Your roof represents a large part of the external area of your business and is one of the first things that customers are going to see when they pull up. Choosing quality roof design and professional installation results in a finished product with a host of benefits.

Makes Better First Impressions

Example of our commercial roof installationA roof that’s sagging, cracking, or just plain falling down doesn’t belong on a building that houses a vibrant, growing business. While you can’t stop customers from judging the quality of your products and services by the appearance of your establishment, you can invest in a roof that makes a good impression. A sturdy material with an appealing design serves to attract customers as they’re driving or walking by.

Improves Value

Just like houses, business locations have “curb appeal.” The same clean, new appearance that brings customers in can work in your favor to improve the value of your business property. If you plan on staying in the same location for the long haul, a new or updated roof will help pay for itself because of the value increase to your property.

Keeps Inventory Safe

Whether you’re running a store, repair shop, or restaurant, you’ve put a significant amount of money into your equipment and inventory. The last thing you need is an unreliable roof causing problems. Strong commercial roofing materials protect your assets from the pitfalls of roof damage such as leaks and pest infestations.

Prevents Future Problems

An aging roof could be hiding all sorts of potential issues, such as detached shingles, a rotting deck, leaks, and mold. Professional repair or replacement takes care of all these problems with a single investment that prevents the need for a series of costly repairs in the future.

Saves Time and Lasts for Years

Running a business doesn’t leave you time to deal with a bunch of DIY roof repairs. Choosing professional roof installation for your company puts the job in the hands of contractors who know exactly how to handle the job so it’s done right the first time and will last long into the future.

Enjoy better business performance today with the commercial roofing services from Interstate Roofing. We serve the Portland area with highly qualified sales and production staff members who are equipped to handle all manner of roofing jobs. Contact us today for a free estimate to get the ball rolling on this beneficial business makeover.