National Coatings Blog

What's the difference between Single-Ply and AcryPly Roof Systems

Posted by Nicole Gale on Tue, Jan 24, 2023 @ 11:19 AM

AcryPly vs Singleply

Single-Ply roofing and AcryPly Roof Systems both offer advanced capabilities and high performance solutions to the commercial roofing industry. Both products have a proven history of long-term durability, are cost-effective and offer excellent waterproofing capabilities. Manufacturing and application techniques is where these products differ.

Single-Ply roofing is pre-manufactured as a roll on roof membrane and is sold in multiple widths and lengths. These rolls are then laid across the roof field, glued or mechanically fastened to the roof substrate. Rarely do the widths of the single-ply roll accommodate a full roof therefore, requiring the rolls to be seam welded together to create a watertight roof membrane.

The AcryPly Roof System is a robust, custom system to meet the individual needs of each roof. These systems are brought to the rooftop in totes and pails of AcryShield base coat and top coat, and polyester fabric which gets embedded between the base and top coat for reinforcement and strength. The coatings are sprayed directly onto the roof, around penetrations, HVAC equipment, skylights, etc... to create a fully adhered, seamless, monolithic system across the entire roof field without any seams that can be prone to failure. The coatings offer excellent physical properties for strength, flexibility, durability and outstanding UV resistance for long-term performance. 

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SPF Among Top 5 Best Sustainable Roofing Materials

Posted by Nicole Gale on Tue, Jan 17, 2023 @ 12:07 PM

SPF Graphic3Spray Polyurethane Foam or SPF is not new to the roofing industry. SPF has been around for 60 plus years with excellent long-term performance capabilities. Building Enclosure Magazine named SPF one of the top 5 best sustainable roofing materials to consider for your roof. The article states, "No other roofing material has the combination of strength, formability, seamlessness and insulating value provided by spray polyurethane foam."

National Coatings agrees with this statement 100%. Studies have shown the AcryShield® SPF Roofing System has performance properties in year 15 that are equivalent to the initial installation - 15 years later the roof is still providing the same amount of strength, durability, insulation and waterproofing capabilities as it did on day 1! How's that for long-term performance!

Excerpt from Building Enclosure Magazine's 'Top Five Sustainable Materials to Consider for your Roof'

Written by Eric SkoogDownload our FREE Guide on SPF Roof Coating Systems

Polyurethane Foam

For flat roofs, spray polyurethane foam is an excellent option to consider. It consists of two components (resin and polyisocyanurate) joined together with heat and pressure, which react to rise and form a solid surface. Foam has a number of distinct advantages. It is an insulating material, serves as soundproofing, adds rigidity to a structure, is lightweight and very durable. Foam has been used in roofing applications since the 1960s.

Since it is a seamless product, maintenance is fairly simple. A utility knife and a tube of caulk will serve to address most issues that might arise with a foam roof.

Polyurethane foam has one distinct disadvantage-it will break down over time when exposed to the sun. This is overcome by coating the roof with an elastomeric acrylic, silicone or polyurea, all of which block ultraviolet rays from getting at the foam. The coatings can be used to add a variety of colors to the roof system, although the lighter colors tend to add the most to the insulating value of the roof system.

Polyurethane foam can be installed to any thickness in a series of passes called "lifts." This puts insulation on the outside of the building, blocking heat or cold from passing through to the structure beneath, and vice-versa. No other roofing material has the combination of strength, formability, seamlessness and insulating value provided by spray polyurethane foam.

As society becomes more environmentally-conscious, architects and developers are converting to more "green" products for construction purposes. For more information about "green" roofing materials, be sure to reach out to your local roofing expert.

HI Grocery Store Header Backside Picture copyLearn More About AcryShield SPF Roofing Systems

Superior Waterproofing...Sustainable Roofing

There is a roofing system engineered to last the life of your building. AcryShield® SPF Roofing Systems do not degrade like other roofs. The redundant waterproofing from long-lasting sprayed polyurethane foam (SPF roof) and high-performance acrylic roof coating also eliminates UV attack and deterioration. Roof performance properties in year 15 are equivalent to the initial installation. Consider the National Roofing Foundation’s comprehensive SPF sprayed polyurethane foam roof study where Dr. Rene M. Dupuis of Structural Research, Inc. concludes, "The field data…demonstrates that SPF roof systems provide long term performance and sustainability."

Achieve big boosts in your R-value with this fully-adhered, seamless, waterproofing system that has outstanding impact strength. Eliminate the most challenging problem of ponding water by custom tapering your roof as it is applied. All our AcryShield SPF Roofing Systems offer excellent value.

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Key Benefits:

Outstanding Durability Cuts Your Life-Cycle Costs
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A SPF roof lasts for decades and may meet Factory Mutual and UL standards.
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Sustainable-easily renewed for the life of the building.
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Guaranteed for up to 20 years.
Cool Roof System Slashes Your Energy Costs
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Reflects the sun’s damaging heat and UV rays.
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Protects and insulates your building.
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Reduces energy bills up to 30% with short pay-back periods.
Easy Installation Avoids Costly Disruptions to Your Business
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Installs over existing roofs avoiding expensive and time-consuming tear-offs.
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Simplifies roof details and improves waterproofing performance.
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Self-flashes for a seamless one-inch minimum layer of roofing protection.

Hot Roof, Cool Solution (Spray Foam Insulation)

Posted by Nicole Gale on Tue, Jan 10, 2023 @ 02:00 PM


January 1, 2023

Liberty Dialysis Leeward, Oahu – 2022

This dialysis clinic needed a way to keep cool. Their original plan was to install larger expensive air conditioners and have a higher energy bill. MRC’s solution was to properly insulate the roof from the outside, due to some roadblocks preventing an interior attic insulation application.  The clinic is only closed 1 day a week, so that prevented an interior installation of any kind of insulation, even spray foam because of lingering organic compound odors negatively impacting the condition of immunocompromised sensitive patients.

Existing Roof

The original roof was standing seam metal painted blue. It was a heat sink that telegraphed heat directly into the building and made the existing air conditioners run all day, and the air conditioners were inadequate to keep the interior cool.

Prior to the roof being insulated and coated, the interior floor temperatures would average around 76-77 degrees and sometimes hit 80 degrees during peak hours. After the new roofing solution, the floor temperatures (with portable A/C units OFF) read 69-70 degrees.

Temperatures are approximately 6-7 degrees cooler for the entire building, without the necessity for or installation of any additional mechanical/electrical equipment (tested by RIM Architects).  The new exterior reflective surface coating showed a surface temperature of up to 105°.  This is a thirty-five-degree temperature difference between top roof surface and interior floor surface.

The solution allowed the client to save up to $120k per year on operations by removing temporary A/C units. There were 8-12 units being used at any given time, with each unit costing up to $1,000 per month in electric/utility fees.Download our FREE Guide on SPF Roof Coating Systems

New Roof-Over Design

MRC Roofing created a design build solution.  MRC installed a roofing system with an R-Value of 20 which included 2.5” rigid and primed insulation boards from Carlisle SynTec.  The rigid boards were precut/fluted at the shop to fit directly over the existing standing seam metal roof panels.

The rigid insulation boards lay flush and were adhered to the roof with DuPont™ Insta Stik™ Quik Set (single component urethane) and stainless steel fasteners, followed by 1” of three-pound spray applied polyurethane foam by Henry and 38 mils of white acrylic coating manufactured by National Coatings, a Henry Company.

Design Build

MRC Roofing’s Michael (Red) Coleman design build was approved by RIM Architects. This roofing system is not only insulating, but also a seamless waterproof barrier designed by a seasoned contractor.  Contractors should always be consulted for design build solutions.  Field professionals know what will work for cost effective solutions.

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Shop drawing for insulating the roof exterior of the Liberty Dialysis medical center
Jon Vaughn
Jon Vaughn

This entry is written by Jon Vaughn Estimating/Sales at MRC Roofing LLC.