Silicone roof coatings also “chalk” less than standard acrylics decreasing the time required between recoatings. Silicone, asphalt, polyurethane, and acrylic elastomeric roof coatings are the most common options. • Silicone Roof Coating Restoration. Acrylic coating is the most affordable (even the best kinds cost under a dollar per square foot). February 25, 2023 February 9, 2023 by Julia B. Urethanizer 5 Gal. This 4. Acrylic Roof Coating. Now with Dirt Pick-Up Resistance (DPR) Technology, it will keep your roof whiter and brighter longer. Acrylic coatings are known to wash off in rain. Kool Seal. Progressive Materials LLC 540 Central Court New Albany, IN 47150 Telephone: (812) 944-7803 Fax: (812) 944-7804 Shop#923 ETERNA-SIL PREMIUM SILICONE ROOF COATING. Acrylic coatings are water-based and low VOC, making them a safe and efficient solution for occupied buildings such as hospitals. Products: EnergyGuard Silicone Coating, EnergyMax Silicone Coating. To understand the benefits and limitations of each roof coating, you have to first understand the basics. Mastics, Cements and Sealants. Acrylic is great on roofing such as tar because it will stay white and reflective. Their superior waterproofing and UV stability simply cannot be. In this edition of Tech Talk, Brian and Eric perform an adhesion test on our roof coating products Silicone 410 and Aromatic Urethane 520. ft. Higher solids than acrylics, more coating stays on the roof. Acrylic Roof Coating vs Silicone Roof Coating. While we typically apply an acrylic elastomeric roof recoat every 18 years, a silicone roof recoating should take place every 10 years. Acrylic refers to the polymer used in the coating. Polyurethane roofs that hit that 15 to 20-year mark. It can be economically tinted to any custom color. Silicone Vs. Roof Renew Kit; TPO Roof Primer; Cleaner/Activator Part 1 for EPDM Rubber Roofing; Acrylic Coating Part 2 for EPDM/PVC Roofing; CoolCoat™ Part 2 for EPDM/PVC Roofing; Signature Extended Life Silicone Coating Part 2 for EPDM/TPO Roofing; Coating-Ready Cover Tape; Metal Roof Rust Inhibitive Primer; Elastomeric Metal RV. 50 per square foot installed, depending on the brand and type of silicone coating used, number of layers/applications, and your home’s. 75. • Treat all curbs, penetrations, and drains with GAF Premium Brush-Grade Acrylic Flashing and 12” GAF Premium Fabric. Acrylics can be beneficial and cheap when in need of a quick fix on a sloped roof, but silicone is far superior when comparing longevity, durability, and ease of application. Watch on. We specialize in Spray on Silicone flat roof coating repair / restoration in Houston and southeast Texas. Here at Progressive Materials, a common misconception we come across is that there is not much difference between organic coatings (like acrylic or paint coatings) and our inorganic, silicone coatings. Each of these roof coatings is applied the same way. Both acrylic and silicone roof coatings are viable options for your roof membranes. However, with higher material costs (as of August 2023. Silicone vs Acrylic Roof Coating. Acrylic elastomeric coatings are liquid-applied and dry to form a thick, fully adhered, monolithic (seamless) membrane in situ on the roof. These coatings are rolled or sprayed as a liquid to. Roof foam is excellent for all climates. The decision between silicone and acrylic roof coatings should be based on the specific requirements of your roof and your long-term goals. 75 dry mils per gallon for a square area. As the pricing structure mentions, silicone roof coating requires you to splash out $2 to $3. Recoat Cure Time and Temperature: 2 hours @ 100°F. Solvent-Based Silicone. Wind and rain Weather is a large factor when dealing with roof repair—wind and rain can be an enemy to a roof repair job. Dicor Rubber Roof Acrylic Coating; 10. 50 per square foot installed,. I needed most of the 5 gallons. To answer that question we’re going to do a full comparison of the two types. You have to be very careful when choosing an acrylic coating, though. Venture Roofing of Atlanta provides professional commercial and industrial roof coating services to clients in and around the Alpharetta, GA area. Product Description: TopShield® Pro #80 Premium Acrylic Coating is a premium, highly flexible, white acrylic roof coating. NRCA was the proponent of the code change that added IBC 2021’s Section 1509. Like asphalt emulsions, it can be applied with layers of reinforced polyester fabric, giving a durable, waterproof finish. The product is warranted for life. for pricing and availability. It can be economically tinted to any custom color. Pros of silicone coatings Cost-effective. Polyurethane Coatings vs. Get exc. It provides long lasting protection against weathering due to the effects of the ozone, UV radiation, and extreme temperatures. Elastomeric: Stronger and thicker than acrylic. These coatings are applied anywhere from 2 to 3. 2. Under these conditions, curing will be in the 1–2 day range. Furthermore, glass joinery, metal, tiles, PVC and structural elements used in the filling and bonding. Use with Dicor Rubber Roof Cleaner/Activator for proper adhesion to EPDM roofs and TPO RV Roof Primer for proper adhesion to TPO roofs. Base: Change Base. Heng’s 1-gallon Rubber Roof Coating. Buckets of liquid roof sealant can be helpful for. Acrylic roof coatings have protective and reparative benefits for roofs. Our Verdict. Silicone acts as a weather and water resistant material to protect roofs from rain and snow damage. Read More: Silicone vs. The products can work well with a range of roofing substrates, just like silicone. The most common types of roof coating systems are acrylic, polyurethane foam, and silicone. Heng’s rubber roof coating has always been one of my go-to RV roof replacement products. Learn the fundamentals of roofing with these how-to videos, commercial roofing tips, roofing industry updates, and everything else related to roofing. Henry Silicone Roof Coating (HE887HS073). The repairs are usually less than 25% of the roof, keeping the rest of the roof untouched. Acrylic roof mastic, typically rolled on to a roof surface in two coats, used on many types of roof surfaces. Acrylic. . Acrylic vs. They go on as a liquid and can be sprayed or rolled on for an easy application process. Acrylic roof coating is a type of polymerized acrylic sheeting that can be used to coat the surface of various building materials. These include waterproofing abilities, tensile strength, and environmental friendliness. foot in materials and labor. Pay $71. Superior ponding water resistance. Withstands impact and prevents cracks. About GAF Roof Coatings. (1231) Questions & Answers (1504) 100% waterproof, energy efficient, reflective roof coating. These liquid applied membranes, also known as fluid-applied membranes, can be applied over various substrates such as concrete, brick,. This makes it tough. This product is available in various colors. Show Details. Container Size: Tooltip, select to read tip. ft. Extend the life of your roof with Tropi-Cool in three simple steps. Roof Adhesives and Primers. Acrylic Roof Coatings: Choosing the Best Protection for Your Roof Previous Post Protecting Your Investment: Things to Consider. Silicone roof coatings can reflect up to 80-90% of the sun’s harmful UV rays. Not all coatings are acceptable or compatible on. Silicone Roofing Systems. New Albany, IN 47150 Telephone: (812) 944-7803 Fax: (812) 944-7804. Benefits of Cool Roofs Include: Increased occupant comfort, especially during hot summer months. The pairing of an adhesive urethane base coat and reflective silicone. No hot kettles, no expensive installation equipment, and no special seaming. This water-based coating works on numerous roofs in different climates, comes in various colors, and provides tremendous value. The signature 100% silicone roof coating permanently flexible and unaffected by UV rays or temperature extremes. Can be used to seal venting systems and AC systems. They have four primary purposes: (1) protecting roof membranes from ultraviolet degradation and weathering, (2) enhancing a roof system’s fire resistance, (3) providing a watertight layer on an existing roof, and (4). Before applying a silicone coating over an acrylic one, you must thoroughly prepare the surface. ” Silicone Roof Coatings and RV Roofing Materials Compatibility. Stage all products out of direct sunlight and protect them from freezing. Silicone is inorganic and will not break down after. As stated earlier, coating a roof is an ideal way to experience energy savings and prolong the life of your. We would not recommend tinting this item, as it will disqualify any product warranty. It was very easy to do. Enter the number of feet (square feet or linear feet) to be covered: Pack Size. The brand is a pioneer when it comes to roof coatings and has been a prominent name for years. ASC X Instant Set Coating. ASC Cool Roof Systems are the highest quality waterproofing and sustainable roofing system. Once a roof coating has been applied, it's essential to inspect the roof regularly to ensure that the coating is still in good condition. $62. Our coatings have a VOC content so low that they are approved to be sprayed anywhere based on VOC content, meaning they meet even the most stringent requirements. 100% Acrylic (Water-Based) (5) Acrylic (5) Acrylic (5) Silicone (2) Silicone. Already in one gallon size. Henry Pro Grade 988 Silicone White Roof Coating is a professional one-component silicone roof coating. Acrylic. Ideal for use on flat and sloped roofs including, but not. These products are often used in high-moisture. It was very easy to do. Acrylic coatings differ from Silicone coatings because the former uses a water-based solution and replaces VOC in silicone coatings. This product is a high performance, solvent free, high solids, single component, moisture cure. Reflectivity after coating (80–90%) Silicone-coated roofs tend to get dirty within 6 to 12 months after application. These coatings are applied anywhere from 2 to 3. ASC S SilIcone Coating. Rubberseal Liquid Rubber Sealant: Best for Low-Pitch Roofs and Protecting Against Standing Water. We offer warranties ranging from 5 to 20 years on our silicone roof coating systems. Kool Seal® Tundra™ Rubberized Roof Coating is the solution for building owners looking for roof coating that provides ponding water resistance. It is similar to the acrylic resin used in latex house paint but that. One thing to consider with silicone roof coating is that it easily holds dirt. Elastomeric roof sealers – acrylic, butyl, polyurethane and silicone – create a waterproof and weatherproof seal when applied to a roof. Acrylic roof coatings are made from durable acrylic polymers and are usually white. The cost of a standard acrylic coating will typically fall between $3. ”. 0 out of 5 stars 63 ratings. Roof and Foundation Coating. 3- Silicone. Our coatings have a VOC content so. Some coatings come with reinforcing fibers, and some opt not to include the fibers in the mixture. Silicone vs. Acrylic coatings often require two coats, a primer, and fabric reinforcement. This product adheres well to any clean surface, from metal to EPDM rubber roofs. Acrylic forms a hard coating that is still flexible. This means building owners and facility managers can save money by reducing cooling costs during the hot summer months. It is often used if the roof experiences excessive amounts of water or where. The nature of the liquid coating makes elastomeric coatings a superior choice for making sure the roof is well-sealed. Here are the advantages: Strong adhesion: Silicone bonds strongly with surfaces like metal, galvanized steel, concrete and asphalt roofs. Silicone Roof Coating. Acrylic Commercial Roof Coatings [Infographic] Recommended for: Acrylic coating doesn’t hold up well to ponding water. Typically white in color, these coatings have the same viscosity as paint, which makes it brushable, rollable, or sprayable. It also has a white color instead of a black one, making it better at repelling UV rays and keeping your home cool. It features Dirt Pick-Up Resistance (DPR) technology, which prevents dirt and dust buildup, keeping the roof whiter and more reflective longer. Silicone Roof Coating Key Benefits: Seamless waterproofing. The same cannot be said of silicones which can puncture easily. For an average 20,000 sq. No hot kettles, no expensive installation equipment, and no special seaming. Lasts 10 to 15. Dicor Self-Leveling Lap Sealant : Best Option for RV Roofs. PVDF’s main component, resin, keeps the coating looking fresh without chalking or. Acrylic waterproofing coating cannot be applied in temperatures below 10 °C. 241 4. . This sprayed-in-place Polyurethane Foam (SPF) applies as a liquid and expands into a foam to create a seamless, single layer of roof insulation. 25-gallon, bucket, it’s a good choice for smaller roofs or minor repairs. It can be used on smooth asphaltic BUR, smooth or granulated cap sheet, single ply roof membrane, well. Ponding Water. October 6, 2016 – Gaco Western is entering the RV industry with the launch of GacoMobileRoof Kit, a 100% silicone roof coating system and accessories kit that will waterproof the aging roof of any recreational vehicle or motorhome. This silicone coating is 100% made out of pure silicone and it produces a seamless layer to seal, repair, and protect your roof against ponding water, leaks, and inclement weather. This product can be safely used on roofs made of PVC, EPDM, Modified Bitumen, Metal, and Wood. 50 per square foot, including installation. Since it comes in a 32-ounce, or 0. Organic Coatings. Roof sealants come in a few different types of packaging. You get up to 10 years of protection with one application of this high-solids coating that has a premium, reflective formula. The application process for the 885 is a little. Flex Seal Liquid Rubber in a Can. Once coated with an approved acrylic, silicone, or urethane coating, GacoRoofFoam forms a complete roofing system for new construction or re-roofing projects. Thoroughly rinse the roof and allow time for the roof to completely dry. foot commercial roof, it will usually cost between $2. GacoRoof 100% Silicone Roof Coating creates a seamless membrane to seal and repair existing roofs and permanently protect against leaks, permanent ponding water and the damaging effects of severe weather. Acrylic coatings have been a key component of cool roof systems for many years now. If you have a small area of ponding water, the coating will degrade, peel up, and could lead to leaks. If a new coating won't fix the problem, replacing a mobile home roof costs $1,500 to $5,000 and may be the only solution. Read More: Silicone vs. COOL ROOF STORE. February 24th, 2023 How to Remedy & Prevent Ponding Water on a Flat Roof. Among the most common types of EPDM Rubber roof coating used by professionals is an acrylic based variety. . When cured, it forms a permeable membrane, which prevents liquid. 5 gallons per 100 square feet, depending on the substrate. Often referred to as the “original” elastomeric coating, acrylic roof coatings are generally a popular choice for sloped metal roofs. Silicone coatings stick to a surface fast and dirt can leave an unsightly impact on your roof. I needed most of the 5 gallons. Acrylic refers to the polymer used in the coating. Marlin Coatings' Acrylic Roof Coating is designed to provide a protective waterproof membrane and is formulated for maximum UV resistance and solar reflectivity, minimal discoloration, and to have the ability to provide a completely. It comes in one- or five-gallon buckets, tubes of caulk, tapes or even spray coatings. Eliminates the need for a costly tear-off, roof disposal and landfill waste. Polyurethane is a much stronger coating and will not puncture easily if a tool is dropped or outdoor furniture is dragged across its surface. 00 and $3. Roofing contractors in areas of high humidity should be cautious and not take. Most choose aluminum due to its effective ability at reflecting ultraviolet radiation, reducing temperatures on the rooftop, preventing premature aging. Editor’s Rating: Quick Facts: Type: Acrylic. Select a Product. Flex Seal Liquid Rubber in a Can. A Silicone Restoration Membrane (SRM) is a fluid applied silicone coating sprayed directly onto an existing roof system. This water-based product simply cannot withstand ponding water. And when it comes to choosing the best one, the answer will often be a silicone roof coating. Prepare the surface. GAF liquid-applied roofing system solutions create a seamless barrier to weather elements. com. Like Silicone roof coatings, acrylic roof coatings are highly reflective, which will help keep your cooling costs down. 5-Gallon White Elastomeric Reflective Roof Coating (10-year Limited Warranty) Model #. Roofed Right America uses fluid-applied silicone on commercial roofs nationwide and throughout southeast Wisconsin. 500 percent flexibility. Both options are popular because they generally extend a roof’s lifespan and quell any leak. While we typically apply an acrylic elastomeric roof recoat every 18 years, a silicone roof recoating should take place every 10 years. Best Premium RV Roof Sealant and Coating: Heng’s Rubber Roof Coating. (240) Questions & Answers (234) +6. CURES FAST. *For EPDM Rubber Roofs, our EPDM Rinse Cleaner is specifically formulated to clean and prime aged EPDM Rubber Roof. The silicone-modified formula is designed to promote excellent resistance to cracking, peeling, and blistering, even under severe weather conditions. Acrylic is one of the most long-lasting materials for a roof. Our products are easy to apply, and completely waterproofing your roof with just one, easy application. These coatings are UV resistant, environmentally friendly, and are simple to work with and clean up. Ziollo RV Flex Repair. Acrylic. Silicone Coating. 100% Acrylic Urethane Elastomeric White Reflective Roof Sealer: 869 Rubberized Aluminum Roof. silicone roof coatings weighs factors like durability, climate, energy and waterproofness. This liquid rubber provides both water and UV protection and is non-toxic. Silicone coatings can last two or three times as long as most acrylic coatings if properly applied. Contractors charge 20%+ more for complex applications on sloped roofs. Excellent resistance to heat, cold, and UV radiation. The main difference is the resulting product, which is much more like rubber than the hard plastic shell created by an acrylic. 75 gal. Using Water-Based Coatings During the Fall & Winter. It is often used if the roof experiences excessive amounts of water or where rain is a common occurrence. Acrylics can offer a quick fix on a sloped roof, but silicone is far superior when comparing longevity, durability, and ease of application. Acrylic is the most common roof coating material due to its affordability, convenience and better environmental impact. These factors, taken together, will determine the roof system’s fire rating. The roof coating is just one component in the fire rating of a roof assembly; other components include slope, the coating substrate, whether the roof deck is combustible and whether the roof is insulated. 2. Again, The best commercial roof coating is becoming more and more clear. An impressively flexible and strong RV roof sealant and coating that’s formulated to last a whole lifetime. Read page 1 of our customer reviews for more information on the Henry 887 Tropi-Cool 100% Silicone. Protects the roof from elements, including rain and snow. . Be sure all loose dirt and debris is removed. 2. Water is less likely to pond on your roof. Ultra Siliconizer is a thick, high performance silicone-modified 100% acrylic elastomeric roof sealer. On the jobsite, VOCs help condition or soften the substrate and improve. Marlin Coatings' Acrylic Roof Coating is designed to provide a protective waterproof membrane and is formulated for maximum UV resistance and solar reflectivity, minimal discoloration, and to have the ability to provide a completely. The Henry Pro-Grade 988 silicone roof coating is the best in the business. HIGH SOLIDS. A silicone roof coating is highly waterproof and prevents water penetration, even on flat roofs. Our Top Picks for the Best Silicone Roof Coatings – Highest Rated. I put a white silicone coating on a 500 square foot flat roof over my garage. Organic Coatings. Acrylic roof coatings are highly reflective and UV resistant. High Solids Silicone Vs. Contractors: We Want to Partner with You! We offer Acrylic and Silicone coatings, as well as a full line of primers, ancillary products and other roofing supplies. These important qualities can save money by drastically reducing cooling costs during the hot summer months. Acrylics are user-friendly, easy to clean up, can easily be recoated, and provide energy-efficient reflectivity. 50 to $6. A complete roof tear-off and installation can cost $4 – $10 per square foot. 06-27-2023. Silicone roof coatings create a highly flexible, monolithic, and impermeable membrane capable of withstanding wind-driven sand, oxidation, and extreme temperatures. Aluminum & Asphalt Roof Coatings. In this edition of Tech Talk, Brian and Eric perform an adhesion test on our roof coating products Silicone 410 and Aromatic Urethane 520. 00 per square foot for the average 20,000. It is a weather resistant material and thanks to its flexibility, it can be used between the. Peak energy savings and electrical grid stability. You want a roof coating that repels water away. 00 per square foot for the average 20,000-square-foot commercial roof. ft) 100. That is because silicone coatings can withstand UV rays and moisture better than acrylic coating. 00 and $4. Available in two options - PolyBrite 90, a premium grade. If you are in need of a commercial roof coating contractor, give us. web // The Cool Roof Store sells two very different types of silicone roof coatings, which are. Silicone coatings provide strong adhesion to many. However, most roof coatings will have warranties between 5-15 years. The same amount of silicone coating will cost between $700-900 and this doesn’t take into consideration the epoxy primer that many. AF4700 patching cement works with the A47 coating as a flashing material, but can also be used for minor repairs. You should coat over Henry 289 with an acrylic roof coating like Henry 587 Dura-Brite to protect it from the damaging UV rays of the sun. Hover Image to Zoom. Silicone vs. Eterna-Kote 4. Acrylic vs Silicone Roof Coating . When it comes to cost, the silicone roof coating is cheaper than acrylic coating. Silicone Coatings. Extends the lifespan of your roof with lower roof maintenance costs. It can help add many more years of life to your RV. 75-gallon White Roof Coat from KST Coating is one of the best RV roof coatings with its rubber-like protection from moisture and UV rays. This coating with 575% elongation is internally plasticized to retain its mechanical properties for many years. 14. When it comes to application, the two products have the same 35 to 120-degree F application range. Heng’s 1-gallon Rubber Roof Coating. See More: Silicone Vs. Henry. Many silicone coatings will discolor because the tar will bleed through. The sealant is designed to be used on fiberglass, metal, and rubber roofs. This water-based roof coating is widely used on pitched metal roofs. 5 Gal. Another coating option is the SPF or Spray Polyurethane Foam which is more expensive than acrylic and silicone depending on the cell type and density. 75-gallon White Roof Coat from KST Coating is one of the best RV roof coatings with its rubber-like protection from moisture and UV rays. Since it comes in a 32-ounce, or 0. Silicone roof coatings excel in this environment. It’s important to note that the lifespan may be longer than the warranty. 75 to calculate the gallons per square area needed. # for 2 coats. Prepare the surface. In this blog we look at silicone vs acrylic coatings, compare each, and determine which coating is the. Water Resiliency: As standing water can more easily deteriorate acrylic coatings versus silicone, acrylic can only be used on roofs with proper draining. A silicone roof coating is. Recoat to Restore. Roof sealing costs an average of $1,194 and typically ranges. Silicone Roof Coatings vs Acrylic Roof Coatings: Cost Silicone vs Acrylic: Comparison. Let’s say that you’re trying to decide between APOC 252 SUNWHITE Premium White Architectural Grade Elastomeric Coating and Henry 587 100% Acrylic Dura-Brite White Elastomeric Roof Coating. Polyurethane Coatings vs. Once coated with an approved acrylic, silicone, or urethane coating, GacoRoofFoam forms a complete roofing system for new construction or re-roofing projects. Not for use with silicone-based coatings. com. On a hot summer day, a silicone roof coating can reduce the temperature of your roof by up to 60 degrees, which prevents that heat from penetrating the roof into your building. Lanco® Siliconizer™ is a styrene acrylic silicone modified roof coating 100% elastomeric and ultra-white. 2- Acrylic. It comes in one- or five-gallon buckets, tubes of caulk, tapes or even spray coatings. Silicone coatings provide a good balance of durability, quality, and waterproofing over other types of roof coating. From industrial to commercial buildings, a roof coating can be detrimental to the roof’s longevity. Learn the fundamentals of roofing with these how-to videos, commercial roofing tips, roofing industry updates, and everything else related to roofing. Close Skip navigation. Siliconizer Roof Coating is a thick, rubberized, high performance and silicone-modified elastomeric roof coating. 587 Dura-Brite 100% Acrylic White Elastomeric Roof Coating 4. foot in materials and labor. Applying a coating to a mobile home roof costs between $0. Henry 887 Tropi-Cool 100% Silicone White Roof Coating is a premium, 100% silicone, moisture-cure coating designed to reflect the sun's heat and UV rays as well as protect many types of roofs. With an exceptional 35+ year track record, Conklin continues to be a trusted name in the commercial roofing industry. How Much Does Silicone Roof Coating Cost. A heat-reflective and elastomeric formulation to protect and waterproof a wide variety of structurally sound roofing. Does not work as a thick coating agent. Henry 887 forms a tough chemical bond to the roof surface that is much stronger than how conventional acrylic coatings bond. Polyurethanes typically have a higher solids content than silicone roof coatings. for pricing and availability. 1. Learn the differences between the two most widely used elastomeric roof coatings. Reflectivity. Intro to Acrylic, Silicone & Urethane Coatings. Acrylux’s Roof Mastic product advertises a VOC of around 75 g/L compared to a comparable silicone coating being listed as 240 g/L. as a manufacturer of OH-polymer, UNISIL offers high quality oh-polymer 2000cst for silicone coatings. Since your roof is being restored with a silicone coating, most of the roof surface is in good condition. Acrylic roof coatings are highly reflective and UV resistant. To answer that question we’re going to do a full comparison of the two types of roof coatings. Features & detailsThe Cool Roof Store sells both coatings and will be happy to show you all the tricks of the trade that can save you from making an expensive mistake. PVDF coatings are great for resisting debri collection and have high reflectivity. Ultra Siliconizer is a thick, high performance silicone-modified 100% acrylic elastomeric roof sealer. Proper preparation ensures a clean, smooth, and uniform surface for coating adhesion. White TPO is highly reflective and offers the building great UV protection. The most common options for mobile home roof coatings are acrylic and liquid rubber. The insulation will consist of 4 inches of recycled polyiso topped with 4-7 inches of EPS. Acrylic roof coatings are one of the cheapest available types of roof coatings, but other materials can offer a longer lifespan. Also, acrylic is usually the cheaper coating in terms of raw. The coating color of silicone also doesn’t change when exposed to. Extreme weather events or excess foot traffic can negatively affect the roofing system. 50. For the difference of.