Leaks & Service Repairs

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Reroof Estimates & Inspections

757-399-3066 ext 1 (Reroof Estimates & Inspections)

Category: Types of Roofing Systems

5 Factors That Affect the Lifespan of Your Commercial Roof

While the life expectancy of a commercial roof is anywhere from 10 to 40 years, there are several factors that can affect how long it lasts. Pay attention to these five factors to extend your roof’s lifespan and save money by avoiding unnecessary repairs or having to replace your roof prematurely.

Installation

When having your roof installed, make sure to choose a reputable company that is licensed and experienced in installing commercial roofs. An improperly installed roof can cause a large variety of problems including sagging and leaking.

Roofing System

The quality and types of materials used to build your roof will have a direct effect on how long it will last. While TPO or EPDM roof systems have a life expectancy of 22 to 35 years, an asphalt or metal roof can last up to 45.

Weather

While you certainly can’t control the weather, extreme weather conditions like rain, wind, and snow can take a toll on your roof. Even extremely sunny weather all year long can be problematic. Take the proper precautions to prepare for storms and inspect your roof whenever harsh weather hits.

Maintenance

All roofs are subject to wear and tear and will need to be properly maintained to last as long as possible. Perform routine inspections on your roof and quickly address any leaks you find. Replace damaged or missing shingles immediately and clean off any debris or algae growth.

Proper Ventilation

Excessive heat can cause damage your roof and quickly cut years off its life. Ensure that your roof and building is properly ventilated and insulated to help keep your roof cool. Not to mention, a well-insulated building will keep the interior nice and comfortable and help lower utility bills.

Inspecting your roof to make sure it is in the best condition is worth the time and money you will save down the road. Choose Andrews Roofing to install your roof and make any repairs you might need. Call us today at 757-296-0553!

 

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What is Your Roof Made Of?

At Andrews Roofing, we know that our job is not only to help you build, maintain and restore your roof, but to help you understand the type of roof that you have so that you can preserve it for years to come.

There are many types of roofing materials, some more widely used in commercial roofing than in residential and vice versa.  Among the roofing types, we have selected 7 categories to briefly describe their characteristics.

SHINGLES –  Popular on many residential structures in this area, shingles are cost efficient, durable roofing material made with a base mat of paper, cellulose, wood fiber, or other materials saturated with asphalt to make it waterproof, then a top coating of adhesive asphalt is applied and ceramic granules are then embedded.  Shingles are the most common material used on residential roofs.

Different Shingle Images

TPO – Thermoplastic Polyolefins are blends or alloys of polypropylene plastic or polyprolylene and ethylene propylene rubber (EPR) or ethylene propylene diene terpolymer rubber (EPDM).  These extremely durable membranes come in several thicknesses, making it an appealing option that is common on commercial roofs and also used for residential roofs with little to no slope.

Commercial flat w many penetrations

EPDM – This synthetic rubber roofing membrane has ethylene and propylene astwo primary ingredients,, are derived from oil and natural gas.  EPDM is slowly being replaced by TPO membrane roofs.

EPDM Roof

METAL  – Primarily made of steel or aluminum, metal roofs have proven to stand the test of time.  Copper, zinc and titanium are also used in specialized architectural applications for homes.  Although metal roofing is more expensive than most other roofing materials, it is considered the strongest, most durable roofing material.

SANYO DIGITAL CAMERA

PVC – an ideal long term solution PVC roofing membrane is made of thick, flexible UV-resistant thermoplastic material; it may also contain polyester or fiberglass, resins, pigments, plasticizers and other chemicals.  PVC is most often used on commercial buildings.

PVC Roof

COMPOSITE OR SYNTHETIC – A substitute for the real thing, synthetic types are created to mimic the look of real tiles, are often more environmentally friendly, sturdy, and energy efficient than their counterparts.  Virtually indistinguishable from real slate and wood, manufacturers such as EcoStar have developed a strong track record for dependability and are the top of their class.

Enviroshake Roof

MODIFIED BITUMEN – These systems can be installed with the common torch method, asphalts, or cold adhesives. A standard modified bitumen roof system is a two-ply system applied in rolls that overlap the edge of the previous roll.  They are typically used on flat surfaces.

Modified Bitumen Roof

SLATE- This natural stone has a unique and beautiful appearance. One of the longest lasting roofing materials on the market, slate can also be expensive to maintain.

Slate roof

 

No matter what type of roof you have, Andrews Roofing provides the experience and knowledge needed to preserve, repair or replace your roof.

 

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TPO for Commercial Roofs

TPO, or Thermoplastic Polyolefin, is a synthetic rubber compound that is one of the most popular roofing solutions for commercial buildings today.

There are many notable advantages to installing a TPO system on a commercial building. For one, TPO can be fused to create a highly reliable, long-lasting seam. In addition to its strength, it is a heat-reflective, energy efficient material that was created to withstand the effects of ozone, chemical, and ultraviolet exposure. The materials’ ability to endure these types of effects is what makes it such a cost effective option.

Flat roof with skylights from 2010

TPO comes in several different thicknesses and can be mechanically fastened, fully-adhered, or ballasted, depending on the existing structure. It is most commonly applied in a white color to maximize its efficiency. By reflecting heat and light, TPO guards the roof from absorbing and transmitting outside temperatures to the interior of the building.

Having a qualified roofer is essential when installing TPO. The estimator must assess the current condition of the roof and recommend the best system to install. Even the preparation to the surface of the existing roof is essential for proper installation.

Andrews Roofing has highly qualified, knowledgeable estimators and installation crews with several years of experience with TPO systems. If you are interested in inquiring about a new TPO roof for your commercial building, feel free to contact our office.

Jeri Eley/Operations Coordinator |757-399-3066 | service@andrewsroofing.com

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Asphalt Architectural Shingles / Why They Are The Roofing Industry “Work Horse”

Landmark CertainTeed Logo

Most of us know what an asphalt shingle roof is. It is an asphalt steep slope residential and commercial roof covering. You see them on most homes and on many commercial buildings. They have always been popular because they are cost effective, perform well, and they last 20 plus years. Because of these reasons they are right now the steep slope roof work horse. In other words, they are driving the market in Hampton Roads and The Outer Banks of North Carolina.

I am talking about architectural or “dimensional ” asphalt shingles. The price gap has closed much between them and 3 – tab shingles , which are a lesser product in every way so architectural shingles are really coming on strong. In fact , we don’t do nearly as many 3 – tab shingle roofs as we used to. The architectural shingle looks better, performs better, lasts longer, is heavier, and has a much higher wind warranty.

We prefer CertainTeed Landmark architectural shingles. They have a limited life time warranty.See photo. Andrews Roofing is a Certainteed “Select Shingle Master” contactor which is their highest designation. Because we install these shingles as per CertainTeed specifications and building code, they come with a 130 mile per hour wind warranty from CertainTeed! They honor it too. In Hurricane Irene in 2011, we lost 2 shingles off a house in Rodanthe , North Carolina and CT paid us to fix it. We had installed the roof 2 years earlier. I have the CertainTeed Landmark architectural shingle on my home and I own a roofing company!

landmark certainteed colors

Please contact me with questions or comments.
Thanks, Robert Andrews

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About EPDM Rubber Roofing

EPDM rubber Ethylene Propylene Diene Monomer rubber is better known as EPDM rubber, and for many years it has been a leading type of single-ply roofing membrane. It is also used in many other applications. The appropriate use for EPDM rubber is on flat or low-slope roofs.

Most rubber roofs are black, but it does come in white to reflect the sun. White EPDM rubber membrane roofing costs a little more than black. This roof system can be mechanically attached or fully adhered and comes in reinforced and non-reinforced. There is also a less common ballasted roof system. Reinforced is used for mechanically attached, and non-reinforced is used for fully-adhered systems. Ask your roofer which one makes the most sense for your roof.

The EPDM rubber sheets come in rolls from five feet up to 50 feet wide. The sheets wider than 10 feet are for fully-adhering only, in most cases. Because covering a roof requires more than one sheet, there are seams in a rubber roof. These seams are primed and an inseam tape is installed to make them water tight. A roofer must be skilled and take extra care in properly seaming the sheets and installing rubber roof flashings.

EPDM rubber 23

Rubber roofs should last from 15 to 30 years, and manufacturers like Firestone and Carlisle guarantee them, labor and material or just the membrane. Your roofer should provide a workmanship warranty too. These membranes range in thickness from 45 to 60 to 80 and 90 mils. A mil is one one-thousandth of an inch. The most common thicknesses are 45 and 60 mil.

Contact me with questions anytime at Andrews Roofing, 757-286-7400, or at robert@andrewsroofing.com.

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Flat / Low Slope Roof Overlay Replacement as an Option (Retro – Fit)

There are many ways to handle your roof replacement. A lot of commercial and residential flat roof owners know that you can install a new roof over top of an old one. Many old built-up roofs are still out there, and most even have rocks on them. These roofs can be expensive to tear off and dispose of, so for years roofers have been overlaying with “recovery” insulation board and single – ply roof systems such as TPO membrane, E.P.D.M., modified bitumen membrane, and P.V.C. membrane. These roof systems will last about 20 years and then you tear both roof layers off and start over.

Single-Ply roof systems are also roofed over. Building codes only allow for two layers of roofing and we agree with this code. Also, the insulation and roof deck on your existing roof must be dry and in such a certain condition to be roofed over. Some roofs cannot be left in place and roofed over for several reasons, so consult with a roofing professional to see if it is an option.

Special specifications are made by the industry when roofing over, so be sure you can trust and rely on your roofer to do the job correctly. Generally, it is better to tear off the old roof, but in many cases a roof over is a very acceptable option. In fact, based on my experience, the vast majority of one layer flat roofs get a retro-fit treatment.

Call or email me if you want to talk about it. Thanks for reading.

Robert Andrews, II
President/Estimator
Phone: 757-286-7400
Email: robert@andrewsroofing.com

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