The rubber used in roofing contains roughly 40% actual EPDM (EPDM base resin). So, if there are a few places throughout the roof that have some ponding water after this 48-hour point, it is within the design of the roof system. 9. Additionally, qualified contractors understand how to slope a flat roof for drainage. Pooling water on flat, fiberglass smooth rubber roof. I am. Its a great long term roof. United States. Special care should be taken when walking on older ballasted EPDM roofing systems, as the ballast stone tends to crack and split over time due to thermal cycling. Most professional roofing contractors worth their salt can install extra drain lines or even widen the existing drains attached to your building in order to direct that excess water away from the rooftop. Despite the fact that they are called flat roofs, commercial flat roofs arent always completely flat. 1 Puddling water over seams and bad slope In this first photo, you can see that the drain sits well above the low area where water is puddling. These battens are placed across the roof, on top of the EPDM membrane, usually at the edges of the individual sheets of EPDM that make up the field membrane. Some of our partners may process your data as a part of their legitimate business interest without asking for consent. EPDM, TPO or spray-on roofing can last up to 20 years. This is an option if the cost of replacing the roof is not an option. For comparison, PVC roof membranes can only stretch about 15% before breaking, TPO membranes 27%, and an asphalt built-up roof about 2%. However we noticed something else, there's a 50" x 14" section on the . Are you a trade or supplier? It might be worth exploring other options first, but if you need to make the investment, there are far worse things to put your money towards. EPDM Installation (Labor) - can range from $350 to $750 per square Maintenance Contract - These commercial roofing maintenance programs prices vary from contractor to contractor Using the price ranges above, you can expect to see bids, including tear-off, material, and installation for a 1,000 square foot roof between $5,250 and $14,000. Puddles of water accumulating on your roof are another common sign of EPDM rubber roofing problems. Slope the roof deck to a drain or scuppers by installing either tapered sleepers below the structural sheathing, or tapered insulation. By the 1980s, it dominated thesingle-ply roofingmarket. Does pooling or standing water harm a flat roof? EPDM is an incredibly hardy material, so cleaning it properly will only benefit its lifespan. Moderator: Moderators. If you have any questions, leave your info below and we'll call you. Hi when EPDM roof covering is being used the existing roof covering including boards must be removed. As more emphasis is placed on the sustainable performance of building materials, EPDM continues to be the roofing material that stands the test of time. This is a common source of roof leaks with this type of roof. Contact us today to see how we can help you! Another problem that can lead to pooling water is compressed . An example of data being processed may be a unique identifier stored in a cookie. As a result of this, water may start to pool on your flat roof. EPDM roof systems are susceptible to deterioration of seams and flashing which remain under ponding water conditions. These areas typically are near chimneys or around large vents. General:TheEPDM Roofing Associationhas thorough and accurate information atthis location(see the menu on the left side of the page for particular aspects of EPDM roofs). I had a flat roof dormer extension built just 3 years ago and are concerned with the level of water pooling on the roof. Maintenance Steps. Though it comes with additional costs, adding additional drains is one of the most effective ways to take care of this issue. You can also hire a professional roofing service to come out and perform those preventative cleanings on your drainage systems once or twice per year. On its own, that debris seems harmless. EPDM roofing systems cost anywhere from $4 to $10 per square foot. You are using an out of date browser. In warmer areas wherecooling degree daysoutnumber heating degree days, black EPDM has generally been replaced as a single-ply roofing material by whitePVCandTPO. It can be helped by installing firings prior to the deck being laid. From the house to the edge of the deck is about 28 feet and about 52 feet across. According to Martin J. Fradua, P.E. EPDM rubber roof membranes, especially unreinforced membranes, are fairly easy to puncture. How To Stop Water Pooling on Flat Roof (Tips + Hacks in 2022), Roofing Advertising: 4 Ideas To Boost Your Company in 2022, 11 Essential Qualities of The Best Roofing Websites in 2022, Roofing Statistics You Will Hear About in 2022, 9 (Fresh + Unique) SEO Tips for Roofers in 2022, Best Commercial Chimney (Cleaning + Sweeping) Tools in 2022. The maximum spacing between drains should not exceed 80 feet. With three different assembly methods and two membrane color choices, there is an EPDM Roof for Every Climate. This is what a completed EPDM rubber roof patch . Ponding occurs when excess waters that is left on a rooftop after a downpour is unable to drain away and remains for 24-48 hours. 10 Summary on Laying EPDM. Ballasted systems do not normally include the hard insulation cover board that the other systems use to provide impact resistance. You can also perform preventative maintenance to ensure that the membrane stands the test of time. Continue with the 20-inch patch, attaching each circle that . 1. While it is always good roofing practice to provide positive drainage for any roofing assembly, EPDM membrane offers greater safety margins in the event of deflection and subsequent ponding. 12 Feb 2011. This system is called fully-adhered instead of simply adhered because all EPDM roof systems typically use some adhesive (at the field seams and at perimeter and penetration flashings). If a new tenant is opening a restaurant, whether or not the space has been used as a restaurant before, that is a particularly good time to inspect the roof. I had my flat roof re covered with EPDM roof covering recently, however one corner has a continuous pool of water. It is all too easy to damage the roof through these processes when some care could save you a lot of time and money. New formulations for the rubber make these roofs virtually impervious to radiation and damage from UV rays. Although shipping container roofs are resilient, the best practice is to remove standing water, ice, and snow that can accumulate on the roof for extended periods of time. With preventative maintenance and a little attentiveness, you can keep your roof working the way it is meant to work. Terms and conditions or if you are doing it yourself you can find suppliers local to you. #1. Elastomeric refers to the ability of a material to stretch and return to its original dimensions without being damaged.eval(ez_write_tag([[300,250],'roofonline_com-netboard-2','ezslot_25',884,'0','0'])); When new, the unreinforced material normally used in ballasted or fully-adhered systems can typically stretch more than three times (300%) its original size without breaking, although this may be reduced somewhat as the membrane ages. Much smaller pieces intended for use as membrane patches or for small flat areas on residential roofs are easy to findon Amazon. The only thing is that my deck is about 1200 square feet over epdm. 712 H Street NE Suite 1618 Property managers should keep a close eye on their restaurant tenants. This material comes in two thicknesses - a 60 mil, the typical thickness installed by builders, and a 90 mil, which is used commercially and by the better roofers for replacement. The ballast itself provides the impact resistance. Good pictures; also pictures of hail damage to other roof types, not just EPDM. Uncured material is sometimes used on the corners of curbs or other locations with sharp angles. The thicker the EPDM roofing membrane, the longer the system will last. Though your flat roof will be level when it is first built, your house can deteriorate with time, causing changes in the structure of the roof. Deteriorated flashings are a common culprit when it comes to roof leaks in older roofs, particularly the corner patches at curbed HVAC units. at the University of Massachusetts, the following conditions should be considered for proper drainage to prevent water ponding: Maximum area per drain is 10,000 square feet, with a minumum of two drains per roof area. Flat roofs, if carried out correctly can and do have water pooling on them without any problems at all, what I would be more concerned about is the open ridge ends? These areas that pool also accumulates dirt and leaves that accelerate the growth of algae and moss which is also harmful to the roof. We know EPDM roofing pretty well, and we thought we would share some helpful information about EPDM roofs here on our website. On most coating systems, ponding water is less flexible. It is convenient to use, mixing readily with water to create a trowel grade material . 20 Standard membrane thicknesses are 45-mil (0.045 inches or 1.14 mm), 60-mil, and 90-mil for unreinforced EPDM, and 45-mil, 60-mil, and 75-mil for EPDM reinforced with polyester scrim.eval(ez_write_tag([[250,250],'roofonline_com-leader-4','ezslot_19',170,'0','0'])); EPDM is a synthetic rubber, ethylene propylene diene monomer (also called ethylene propylene diene terpolymer because its a polymer made from three monomers). Round off any corners (these can be caught by foot traffic, causing the membrane to lift). PermaRoof UK stock Firestone EPDM and SealEco Fleece-backed membrane, both high performance EPDM rubber roof systems for a wide range of applications. The number one roofing choice of architects, roof consultants and contractors for both new construction and replacement roofing projects according to market surveys from Building Design and Construction, and Roofing/Siding/Insulation magazines, and the National Roofing Contractors Association (NRCA). The pooling water does put a lot of stress on the structure of the building. Asked the roofer to correct the fall on the roof to stop water pooling on it. plumbing, drainage and waste water questions here please. This schedule is based on the written prices given to us by the 34 roofing firms: Erect access equipment to the desired work height. The most common cause of pooling . Henry 176 PondPatch Filler and Leveler is strong, durable, has great compressive strength (125 psi) and will not burn. Fully-cured EPDM is one of the most durable low-slope roofing materials available.eval(ez_write_tag([[300,250],'roofonline_com-narrow-sky-1','ezslot_22',110,'0','0'])); Due to its molecular stability, its exceptional resistance to UV radiation, and its non-reactivity in the presence of corrosive environmental substances such as water, acids, and ozone, the sheets that make up a roofs field membrane can remain functional for over 50 years. For a better experience, please enable JavaScript in your browser before proceeding. The insulation and cover board are typically fastened to the metal roof deck below with specialized roofing screws. We research and design EPDM roof systems for new roof installations and roof replacement projects. Chemical Compatibilityof EPDM:See this chartfor a long list of chemicals and whether you can expect them to damage EPDM. The second most relevant factor is the method of attachment. Smooth down the sides of the bead of lap sealant immediately, taking care to leave the sealant very thick directly over the lap edge. Liquid Fillers. Ponding water is defined as the water which remains on a roof 48 hours or longer. The longest lasting type of EPDM roofing will normally be a 90-mil fully-adhered roof, which will typically last around 35 years. Cheaper reflectivewhite membranes such as TPOhave largely replaced them in warmer climates due changing energy code and LEED requirements.eval(ez_write_tag([[300,250],'roofonline_com-banner-1','ezslot_17',894,'0','0'])); In addition, the uncured or semi-cured material used for roof flashings tend to deteriorate faster under the intense UV radiation of Texas than they do in a place like Chicago, for example. Tel: 01562 748270. The cost of a standard acrylic coating will typically fall between $3.50 to $6.50 per square foot installed, depending on the level of prep work needed before the liquid roof coating is applied.-. Repair of EPDM Seams: See this article, Technical Details: Proper Installation and Repair of EPDM Seams, on the Roofing Contractor magazine website. That roof is the last line of defense you have from the elements and it needs to work properly. Titanium dioxide is less UV resistant than carbon black, and as a result the white version of the material tends to be somewhat less durable than the black. I wouldn't worry about it. Most pools of water will quickly drain off - or even evaporate - but owners should be aware of the signs that ponding has become an issue. He also served as an infantry paratrooper in the 82nd Airborne Division and attended Cornell University in Ithaca, NY. Rubber roof membranes are easily damaged by sharp objects, oils, gasoline and other fuels, grease, fats, and solvent-based asphalt compounds such as asphalt roof cement. When people talk about "rubber" roofs, they are pretty much always talking about EPDM. This leads to a decline in the membranes lifespan and can lead to things like leaks which can cause serious problems for the rest of the building. Ponding water can have major negative consequences, regardless of the type of roofing system. Once a top coat has been applied it is completely water tight and you can say goodbye standing water problems on your flat roof. Things That Damage EPDM Rubber Roof Membranes, Damage to Fully-Adhered EPDM Caused by Fastener Back-Out, Roofers Installing Fully-Adhered EPDM Roofing, a black roof membrane can actually reduce annual energy costs, chart showing the life expectancies of all kinds of roofing systems, Best Roof Repair Tape Top 5 Roof Sealant Tapes, Comparative Performance of EPDM Rubber Roofing Membrane as Protection against Hail Damage, ROOFER: Membrane and Flashing Condition Indexes for Single-Ply Membrane Roofs Inspection and Distress Manual, Technical Details: Proper Installation and Repair of EPDM Seams. Structural Damage. This characteristic made the membrane a candidate for many underground waterproofing applications where the material was buried in saturated soil. Moisture can build up and seep into the building structure, causing serious structural damage. The battens come with holes for fasteners pre-drilled in them, and once they are set in place, fasteners are screwed through them, down through the roof system and into the roof deck. ryoung7 (ROBERT YOUNG, CMI) May 28, 2011, 12:52am #9. This happens because of small debris collecting around the leaf filter . If you don't pull the EPDM foil over the wind boards, this "pool" could leak and water could enter. That bit of preventative maintenance might cost a little money in the short term but will save you a lot of time, money, and trouble in the long term. This is only an example and other products and brands may be different. Our clients include homeowners associations, corporate real estate asset managers, property managers, and facility directors. Apply a thin layer of roofing cement all the way to the edges of the 16-inch patch, and press it firmly down over the 12-inch patch. But there is one flat roof waterproofing system that might be the answer to your prayers. Jan 11, 2009 EPDM would be the best because you could most likley have it as one piece with no seams and the wall flashing is the membrane glued up the wall. As a part of our job, we decide whether our clients should use EPDM, TPO, or PVC for their new single-ply roof. 5. Pooling water can damage this membrane, which prevents it from protecting the building. Water Pooling On New Flat Roof. Ponding water is known in the roofing community as water that stands in a puddle on the roof for more than 48 hours at a time. Free shipping for many products! 4 posts Page 1 of 1. northwales4u Senior Member Posts: 2701 Joined: Sun Jul 25, 2010 4:32 pm Location: Wrexham, Wales Has thanked: 76 times Been thanked: 151 times. Start by looking for plugged drains. The addition of carbon black strengthens the EPDM resin, reinforcing its molecular structure and increasing its tensile strength. Roof patch putty can be applied, using a trowel, to fill low areas. To view the purposes they believe they have legitimate interest for, or to object to this data processing use the vendor list link below. Like the drains that live in your home, drains on commercial roofs can eventually become clogged with debris. 10 An EPDM roof lasts a long time. Technical: See CarlislesFully-Adhered EPDMpage. Even people with no roofing experience should find it fairly easy tomake simple repairs on an EPDM roof.eval(ez_write_tag([[300,250],'roofonline_com-large-mobile-banner-2','ezslot_13',869,'0','0'])); EPDM was developed in the 1950s and first used as a roofing membrane in the early 1960s. Puncture, high wind and hail coverage are also options, making EPDM an even more appealing roofing membrane. EPDM is an acronym for ethylene propylene diene monomer, which is the full chemical name of EPDM rubber.eval(ez_write_tag([[300,250],'roofonline_com-leader-1','ezslot_12',137,'0','0'])); EPDM roofing refers to single-ply low-slope roof systems where sheets of EPDM rubber are joined together to make a waterproof roof membrane. Look on the bright side. Once you've completed a brief inspection of your roof, you can start sweeping it. Puddles of water Another common entry for EPDM rubber roofing problems is puddles of water forming on your roof. Flat roofs, particularly those in areas with high precipitation, will sometimes need those additional drains to properly clear the water from the roof. It has a high tensile strength, resists tearing, and remains flexible in cold weather (down to -45F/-43C). Dont let ponding water become an issue for your business when you can use these tips to get rid of that pesky water. Unfortunately we don't have great slope on the surface. This is considerably less than asphaltic (multi-layer) commercial roofing systems such as modified bitumen and built-up roofs, but comparable to other single-ply systems. These slopes are meant to facilitate drainage so that there is not a lot of pooling water on your roof. (EPDM meets ASTM D 3083 Resistance to Soil Burial for Underground Application.). 4.6 out of 5 stars 650. It is important to knowhow to drain water from a flat roof. If the water damage is close to th echimney, then the chimney itself or its flashing could be your problem. This is because there are subtle slopes on the surface of the roof that can come as a result of the installation process, weak spots in the roof, or a particular focus of debris or precipitation. Thankfully, there are a few different tactics that you can employ to resolve those ponding water issues on your flat roof. The solvents in these products will quickly damage EPDM roofing membranes. Polyurethane Elastomeric. This moisture has absolutely no affect on EPDM membrane. Acrylic coatings can be used on a wide variety of surfaces including metal, EPDM, TPO, PVC, modified bitumen, BUR, etc. 05272398. 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