Tag Archives: PVC

Your Flat Roof Options

The Best Roofing Material for a “Flat Roof” Structure

Flat roofs have traditionally been used on commercial structures, but this standard has been changing in recent years. Currently, you can find many contemporary style homes that employ this roofing system, though the majority still rest atop businesses. The reason for this is the easier installation of a flat roof because no consideration for the pitch is needed. Additionally, businesses don’t care much about the type of roof they have as long as it performs its’ fundamental job. With the boom in utilization of flat roof systems, here is a detailed description of the different materials you can choose from.

Built-up Roofing (BUR)

BUR membranes are designed to incorporate affordability and durability. BUR is usually topped off with gravel and consists of alternating layers of asphalt and tar. The Chase Construction North West Inc.multiple layers allow for exceptional insulation for the building underneath and the BUR is waterproof thanks to the absence of seams. There is a downside to all the layers however- the immense weight they carry. Most buildings just don’t have the foundation necessary to support such a load and therefore should not employ such built-up roofing. The BUR membranes require complex installation and must always be installed by a professional commercial roofing contractor.

Modified Bitumen

This material provides many of the advantages of the BUR system only minus the immense weight and difficult installation. This is possible because it consists of a single layer of bitumen which is a mixture of asphalt that has been modified with solvents. Though historically bitumen has been installed with a blow torch in order to bind the Chase Construction North West Inc.seams together effectively, there are now many “peel and stick” options available. The material has the ability to reflect heat from the sun and has been deemed environmentally friendly. Unfortunately, bitumen does come with its’ own problems. It is not very scuff or tear resistant, and great care and expertise needs to be incorporated when installing it. Improper installation could leave it susceptible to moisture penetration and it is recommended to always employ professional help when using this material as well.

PVC or Vinyl Roofing

This roof type consists of flat sheets of PVC that are bonded together through the use of heat. This particular material provides excellent waterproofing, as it naturally resists ponding water. Its’ additional benefits stem from the easy installation required and Chase Construction North West Inc.the fact that its’ white color reflects the sun well, allowing the building to stay cooler and therefore saving the home or business owner energy costs during the summer months. A significant drawback of PVC roofing comes from the fact that it has seams. Although durable, the presence of seams indicates that the material will not retain its waterproof quality for more than 10-15 years. Eventually, the seams start to loosen, allowing for separation between segments.

Which Should You Use?

A final question you might have is which of these materials is the best option. The answer is, it really depends on your budget and needs. With over 13 years of experience, we would love to tell you which option is best for you at one of our totally free estimates! Call us today with your roofing needs Puget Sound! You can trust Chase Construction North West, Inc. with your residential re-roofs and your large flat commercial projects. You can contact us today to schedule your free estimate at 253-445-8950 or by filling out our estimate form. Thank you for visiting our website and considering us for your next project!

Chase Construction North West Inc. Tacoma Roofing

GAF Low Slope Roofing

GAF Interviews Weatherholt and Associates, Inc.

Chase Construction NW, Inc. had the opportunity to capture GAF’s Washington and Alaska’s Territory Manager Shawn Notle discuss the importance of hiring a Master™ and Master Select™ contractor when installing a flat or low slope roofing system on residential or commercial roofing projects. Standing in the heart of downtown Seattle you can see that commercial flat roofs are nearly on every corner.

Shawn had the opportunity to interview Weatherholt and Associates, Inc. Principle and Senior Field Engineer Rob Card who reiterates the importance of not only hiring contractors who are qualified at the highest level of certification, but finding a manufacturer who holds themselves to a high standard.



Why Weatherholt and Associates meets GAF’s Standards

Wetherholt and Associates, Inc. was founded in 1984 to serve the construction industry by assisting in resolving water intrusion problems. Specifically, they specialize in roofing, waterproofing, and building envelope trouble shooting and problem solving. Clients include several major school districts, manufacturing companies, and municipal and state government departments.

Weatherholt and Associates are capable of determining the types of roof and waterproofing systems in place, performing moisture surveys, determining leak sources, and generating CAD details. majority of our work is for commercial, institutional, and public sector clients whose properties require careful and prudent management of resources, both monetarily and functionally. We are familiar with almost all types of roofing, waterproofing, and building cladding. We have the resources to investigate those with which we might be unfamiliar.

If you have any questions, or if we may be of service, please do not hesitate to call us at (425) 822-8397.



Looking for a Master™ or Master Elite™  Roofing Contractor?












If you are in the Puget Sound region of Washington State and are in need of roofing services contact Chase Construction North West, Inc. today. We are Master™ certified contractor through GAF. We have been providing our region with expert commercial and residential roofing services for over 13 years. We provide services in Seattle, Tacoma, Federal Way, Renton, Auburn and all of the surrounding cities.

Fill out our free estimate form or call us today at 253-445-8950. You can also visit GAF.com  and look for GAF Factory Certified Roofing Contractors in your area.

What You Might Not Know About PVC!

                         What is PVC?




Poly Vinyl Chloride, is a thermoplastic material that is heat welded, which makes it more resistant to leaks. It is a highly reflective and durable single ply membrane. Its ease of installation and heat welded seams makes it a common choice for flat roofing.  It can be installed either mechanically fastened or fully adhered. It is designed to be flexible and conform to the movement of the roof. They maintain their flexibly because its formula contains plasticizers as well as salt that is derived from the chlorine used in its production.

It is available in rolls that that are larger than most other roofing systems, in return it has less seams which can mean less chance of failure. PVC is known for its lack of water permeability which can decrease incidents of water ponding. PVC is available in many colors, most commonly used is white. This makes it highly reflective and considered a “cool roof” which can provide significant savings in energy costs and have less of an impact on our environment.



What you should know about PVC!


process pvc








Seems like PVC would be the top choice for your flat roofing system right? Although PVC has been the major building material in the last 40 years, and now totals more than 30 million tons per year, it poses serious environmental and human health hazards. Listed below are main components of PVC and their impact on our environment as well as human health:













  • PVC and Chlorine: Vinyl is the largest use of chlorine gas in the world, PVC is  the largest production by volume of organochlorine which is toxic to humans, animals and our enviornment.  Formation of organocholorine begins with the production of chlorine gas which is used in the making of PVC.The other by product of the production and lifecycle of PVC are dioxins, formed when chlorine gas is burned in the formation of PVC. Dioxins are global pollutants and is the most potent synthetic carcinogen tested, and is a known human carcinogen.


  • Plasticizers: When PVC is in its purest form it is very brittle, to make it flexible for roofing materials they add plasticizers, the most common used plasticizer in the formation of PVC is known as phthalates, which pose serious health and environmental hazards. They are used due to their plasticizing performance and low cost.


  • Lead and stabilizers: Because PVC naturally decomposes over time, metal stabilizes are added to the vinyl to extend its life for construction purposes. One of the most commonly used stabilizer in PVC production is lead, and because metal does not degrade into the environment it has become a global pollutant.


Chase Construction’s Commitment to Environmental Sustainability

Not only are the ingredients and bi products of PVC environmentally hazardous, chlorine production used in the making of PVC is one of the worlds largest energy-intensive processes. Not only that but PVC is rarely recycled because the compounds in vinyl do not decompose. Because of its environmental impact almost all European Union nations have restrictions on the use of PVC.




Chase Construction North West, Inc. is a certified green roofing contractor. We proudly recycle our asphalt roofing shingles and install sustainable building products. If you are interested in re-roofing your home or commercial building with green products or cool products contact us today at 253-445-8950. We specialize in all types of roofing. Chase NW has been servicing the roofing needs of the Puget Sound for over a decade including: Seattle, Bellevue, Renton, Auburn, Puyallup, Fife, Federal Way, Tacoma, Olympia and the surrounding cities. Fill out our  free estimate form or call us today at 253-445-8950.

What is single ply roofing membrane, is it right for my home in Seattle?

Single Ply Roofing For Seattle, Washington

Single Ply Roofing For Seattle, Washington

Chase NW specializes in single ply and commercial roofing!

When it comes to roofing in Seattle we all want to know what is the best type of roofing for our home or business. Low slope roofing systems (a roof with less than 3” of rise per lineal ft) can get even more technical with commercial and architectural specifications required by the city building codes. Its important that you use the best material for your roof design. As a commercial roofing contractor in Seattle we have seen a huge spike in the popularity of single ply roofing systems.

What is single ply roofing membrane

Single ply flat roofing membranes are sheets of strong, flexible material made of synthetic polymer. You will often hear the terms of different types of single ply like “TPO”, “PVC” or EPDM. Single ply comes in different thicknesses that determine the roof life and the length of warranty that a flat roofing contractor in Seattle can offer. The most common thickness or millage are .45, .60, .80 and now EPDM comes in a .90 mil. The membranes come most commonly in white, black and gray, but is also available in custom colors like green, red, tan and other colors.

Sustainable roofing with single ply membranes

Single ply membranes in white have a high solar reflectivity rating. This helps to reduce Single ply systemover heating in a given structure and lowers energy bills. This type of Sustainable roofing often qualifies for special building deductions in Seattle and or the Energy Star federal tax credit.


Single ply membrane comes in rolls ranging most commonly from 4’ to 10’. There are fire rated slip sheets and cover boards that can be used to attain the necessary fire rating you need to insure your building and meet codes. Typically you will run your membrane in the direction of the slope which is either framed in or built using a ridged insulation. The membrane can either be mechanically attached with screws and plates or fully adhered. The mechanically attached application requires welding at the seams. It is commonly stated that the tear strength of the seam weld is stronger than the material itself.


Seattle Single Ply Roofing

Chase NW Roofing is a certified contractor with Versico!

The standard material warranty for single ply membranes such as Versico is 20 years. With special application procedures we are able to offer “complete system warranties” with “no dollar limit” coverage. These no dollar limit warranties are 100% manufacturer backed coverage on material and workmanship from 10-30 years.

Chase Construction North West, Inc is your qualified commercial and flat roofing contractor. We have a wealth of experience installing single ply on commercial and residential structures. For a free quote and consultation please visit our quick estimate form or call us at 253-445-8950.

Thank you for reading our roof life blog. Best wishes from our family to yours!