26 galvanized sheet), Section R905.2.8.3 Sidewall flashing. ENERGY STAR Certified Homes, Version 3/3.1 (Rev. It is installed to direct water run-off away from the adjoining wall and usually into a gutter. 2009,2012,2015,2018, and2021 International Residential Code (IRC). If the flashing becomes damaged, a leak will be the result. Continuous flashing shall be installed in place of step flashing for metal and rubber membrane roofs. In coastal areas, stainless steel is preferred because it is so resistant to salt corrosion. Exposure to salt air and acid rain can cause corrosion while excessive heat, heavy snow, and scouring winds can physically change the shape of the flashing. The Building America Field Kit allows you to save items to your profile for review or use on-site. Proceed only after needed repairs are performed. Flashings shall be installed at wall and roof intersections, wherever there is a change in roof slope or direction and around roof openings. First, you should decide on the type of flashing youll use. As mentioned earlier, it is designed to keep water from penetrating those areas where there is a discontinuity of the roof. Unfortunately, your browser doesn't support those technologies. The Compliance tab contains both program and code information. Flashing a metal roof onto a wall takes extra effort but its usually done in conjunction with other roofing materials, such as wood shingles. Nghe is a marketing professional with more than 14 years of experience in various environments and industries. While we continually update our database, links may have changed since posting. Step-By-Step Guide.
Remove roofing and enough siding on the wall above the roof-wall intersection to expose the existing house wrap or building paper. Climate zone-specific requirements specified in the IECC are shown in theCompliance Tabof this guide. 3, 15. Its pretty self-explanatory where this is used. Space the fasteners between 12 and 24 inches apart. 2022 RoofingHAWK.com | All Rights Reserved. EPDM) that is aligned with the foundation wall from final grade to 8 in. For most people, installing metal roof flashing requires more time and effort than theyre willing to spend. Flashing is typically found around the base of chimneys and skylights, places where you put a hole in the roof on purpose to install a feature. They are relatively easy to install if you have some basic roofing knowledge and experience. It can be exposed or concealed. Where anchored masonry veneer is provided on the vertical sidewall, the base flashing shall be provided in accordance with this section and counterflashing shall be provided in accordance with Section R703.8.2.2. Its used at windows, areas of structural support, and other interruptions in the wall. I'd rather be on the roof. This is important to help prevent water from running into these areas rather than down the sides of the wall. Retrofit: 2009, 2012, 2015, 2018, and 2021 IRC, Section R102.7.1 Additions, alterations, or repairs. Flashing is typically done on brick walls. Inspect the existing wall and overhang framing and review specific detailing for any deficiencies or water intrusion damage and make any corrections, if necessary. As a civil engineer and roofer, I love to share the experience that I have gained through the last couple of years. Please contact our webmaster if you find broken links. The most elegant expression of the concept of drainage is flashing. Plumbing vents and air ducts often come wrapped in stainless steel or other flashing material. See theCompliance Tabfor related codes and standards requirements, and criteria to meet national programs such as DOEs Zero Energy Ready Home program, ENERGY STAR Certified Homes, and Indoor airPLUS. Install the roof underlayment as the water control layer. Terminate the step flashing with a weather-lapped kick-out flashing. Install metal flashing over the exposed area and then install drip edges that follow the same steps as step one. It is a vital roofing material that every roof has to have. Type above and press Enter to search. So, it is an absolute necessity for every household to know the steps of how to flash a metal roof to a wall. Roof step flashing must be effectively integrated with diverters known as kick-out flashing to effectively direct water to the gutters and avoid water damage. Copyright 2022 RoofCalc | Powered By Nail Guns :)PRIVACY POLICY|TERMS AND CONDITIONS|Affiliate disclosure: As a participant in the Amazon Services LLC Associates Program, we may earn commissions from qualifying purchases from Amazon.com. Ensure a minimum 1.5-inch reveal between the bottom of the siding and the shingles of the roof. Flashing should be provided with expansion joints on long runs so it wont deform during the expansion and contraction of the roof or walls. How To Tarp A Flat Roof? For exact code language, refer to the applicable code, which may require purchase from the publisher. If there is no metal flashing installed at the wall-roof intersection, or if the existing flashing is damaged, improperly installed, or allowing water to damage the wall, remove the siding and any existing flashing to expose at least 8 inches of the wall. For more information, see the guideStep and Kick-out Flashing at Roof-Wall Intersections. The flashing is installed between the wall and the metal roof sheet to create a weather-tight seal where they meet when fastened together. Rake trim is placed along the roofline, where the line meets the gable. When rain lands on your roofing, this type of trim directs it to the ground so that it never comes into contact with the fascia. Follow the minimum requirements of the current adopted local building code. Wouldnt you agree every home should have full water protection? Learning how to flash a metal roof to a wall can be beneficial. Installing this type of trim is a bit easier than installing rake trim. Install new kick-out and step flashing, integrated with shingles as required (Figures 7, 8, 9).
:) With years of experience in the roofing industry I was able to join the team here at RoofCalc and help people like you with your roofing questions. When you select flashing material, keep in mind what the flashing will be above or touching in case there is chemical reactivity with adjoining materials. Membranes are one piece and can simplify installation around roof projections. Nothing to worry about, this article will help you to get your job done. Set the very first shingle above the starting strip and kickout flashing, and fix it with roofing cement and two nails. For instance, do not place copper and lead adjacent to each other, although you can use lead-coated copper without the corrosion issue. Metal flashing and self-adhesive flashing tapes protect vulnerable building components and help direct water down and out of the building (see Figure). Concrete is poured around the perimeter of a home to form both the foundation and footers. All Rights Reserved. Ensure proper lapping of building layers to shed water away from the wall and overhang assemblies. Flashing is required at all roof-wall intersections. Section R903.2.1 Locations. With the right color and an elegant design, they can breathe new life into your roofing. Figure 5 shows flashing at a roof-wall intersection with a CMU wall. How to Install Flashing at the Transition of a Wall to a Lower Roof. select your step flashing piece and snip the flashing about of the piece. Its safe to assume these methods were not very successful, so we came up with flashing instead. Cap flashing,also known as adrip capis installed above the windows and doors. Through-wall flashingspans the thickness of the wall. To secure the arrangement, use cement and nail the base with a hex head screw. It can be difficult to seal the entire hole up, and the intersections tend to expand and contract when the temperature and humidity change. It can also be done as a stand-alone retrofit measure or as part of an exterior wall upgrade. of final grade. Alternatives & exemptions in Footnote.3, 13, 14 The Kloeckner Metals website uses modern technologies. They are only slightly more complicated on dormer and chimney roofs, but can still be done with a little patience. These are sized to handle the larger volumes of water runoff that may be concentrated along the wall in rain storms. Metals typically used for flashing include: Plastic and other softer materials can be used but must be able to withstand direct sunlight and weathering. Download the latest version of one of these browsers to experience the site: Steven Nghe is currently the Head of Marketing & Communications at Kloeckner Metals. Article showing steps for kick out flashing at roof-wall intersection. Channel flashingis specialized roof flashing shaped like a U or a channel to catch water at the edges of a tile roof where it meets the wall. 2022 Kloeckner Metals Corporation. What this means to you is peace-of-mind knowing your home has a comprehensive set of measures that minimize the risk of water damage in your home. Building codes establish minimum requirements, but products must also be installed in accordance with manufacturers instructions. Place the nails visible on the shingle. Footnote 15)As an alternative, any applicable option in 2009 IRC Section R905.2.8.2 is permitted to be used to meet Item 3.3 and any option in 2009 IRC Section R905.2.7.1 is permitted to be used to meet Item 3.4. Install new adhesive membrane (ice and water protector) and metal step or continuous flashing that is properly integrated into the weather-resistant barrier and wall and roof coverings to provide continuous water, air, vapor, and thermal control layers on the walls and roof. Some metal roof trim pieces are used to keep water away from the roof fascia. Beyond chimneys, skylights, and vents, flashing is also installed in: Historically, humans have tried a number of ways to keep water from entering their abodes and to keep air movement in check. Counter flashing (cap flashing)covers base or step flashing. The map in Figure 1 shows the climate zones for states that have adopted energy codes equivalent to the International Energy Conservation Code (IECC) 2009, 12, 15, and 18. Set the shingles above the previous kickout flashing. 3.2 For homes that dont have a slab-on-grade foundation and do have expansive or collapsible soils, gutters & downspouts provided that empty to lateral piping that discharges water on sloping final grade 5 ft. from foundation, or to underground catchment system not connected to the foundation drain system that discharges water 10 ft. from foundation. It creates a waterproof barrier that keeps water from entering your homes interior, rather than allowing it to seep through the cracks between your metal roof and wall. This is important because codes typically do not provide all the detailed information for a durable installation. Metal Roof Flashing: A Simple Guide to Installing Flashing, Steel Touches Everything: MSCIs Inaugural Forge Ahead Conference, 5 Types Of Metal Roofing Trim (And Why Theyre Used), Branch Spotlight: Hot Dip Galvanizing & Metal Roofing at Kloeckner Hawaii, 4 Little-Known Facts About Stainless Steel, A Simple 3-step Galvanizing Process Protects Steel for a Lifetime, Galvalume Metal Roofing is High Strength and Corrosion Resistant. Its simply a matter of peeling off the adhesive backing, placing it against your building surface, pressing it down firmly, then beginning to attach your sheets of roofing using screws or nails. Finally, once the trim has been placed, fasteners need to be applied atop each major rib of the metal roofing. You probably agree that a leaky roof is a bad thing. Additions, alterations, renovations, or repairs shall conform to the provisions of this code, without requiring the unaltered portions of the existing building to comply with the requirements of this code, unless otherwise stated. Installing metal roofing sheets onto these walls can be done in one of two ways: either by nailing or screwing the metal roof sheets into the wall substructure, or by flashing the roof to the wall juncture. Best practice is to install counter flashing, using a self-adhered membrane, over the top edge of the step flashing (Figure 10). While many people rely on the company to execute the task, it can be quite expensive. Extend it to the existing wall and over the transition membrane; the underlayment should wrap up the sidewall at least 8 inches. With the rise in popularity of metal roofs, it is important to know how to flash these roofs against a wall. It operates by directing water toward weep holes. Building America Solution Center is a resource of the U.S. Department of Energy's Building Technologies Office. When all of the cap flashings have been placed, seal the gap using caulk sealant where it seems necessary. Step 3: Flash any penetrations or other openings in the roofing surface Flash any penetrations, skylights, etc that will be covered by the roof. Repair any damaged sheathing and framing. These areas are the most prone to leaks if theyre not done correctly. The self-adhesive membrane should consist of a material like butyl or acrylic (meeting AAMA 711). Step 2: Flash the valley and hips (when applicable) Flash the location of any valleys and hips on your roof, including areas where a valley may be exposed due to a dormer or chimney. Note Figures 4 and 5 are from the Insurance Institute for Building and Home Safety (IBHS) Fortified Home program which recommends that the metal drip edge be installed over the underlayment on roofs in hurricane and high-wind-prone regions. In cold climates (zones 5 and higher), install self-adhered ice and water shield membrane over the roof sheathing at the eaves from the edge of the roof line to at least 2 feet up the roof deck from the interior plane of the exterior wall. Most people rely on the company that handled their metal roofing project, from start to finish. 1000 Independence Ave. SWWashington DC 20585. The concrete forms what will become the walls of your house. Roof penetration flashingis for water-proofing places where pipes, supports, cables, and other roof protrusions are built. Follow steps 3 & 4 till you reach the top of the roof. Flashing is your last, best line of defense against the enemy of interiors, water. Pipe flashingis also called apipe bootorvent boot. WHAT IS METAL ROOF FLASHING AND WHY DO YOU NEED IT? For that, we thank you for taking time to browse our articles and hope you find some helpful information to help you with your situation. The environment plays the main role in flashing and roof failure. Make sure you follow them properly and accordingly. Hence, I want to help you with my blog. Flashing can come as roll roofing or as a membrane; each has its own best use. When flashing one of a houses biggest potential leaks where the eave overhang meets a vertical wall editorial advisor Mike Guertin chooses to err on the side of caution to control water flow and not rely solely on step flashing. Inspect the structural integrity of the wall and the overhang. They will be covered by the next stage flashing piece. While we continually update our database, links may have changed since posting. Complete the entire shingle path following the previous steps. Youll also need to apply butyl tape on the underside of the nailing flange. For asphalt shingle roofs, the IRC requires the base flashing against the vertical sidewall to be continuous or step flashing that is at least 4 inches high against the wall and 4 inches wide above the roofing underlayment (2018 IRC Section R905.2.8.3). Step flashing is used with shingle roofs; continuous flashing is used with metal and rubber membrane roofs. Talk to a Metal Building or Components Expert. While typically all water-protecting components on a roof should be installed shingle fashion, IBHS Fortified does recommend in hurricane and high-wind regions that the drip edge at the roof eaves be installed over, not under, the drip edge. These pieces are known as eave trim. The peak trim needs to be cut, angled, and folded to fit on top of the closure as well as the end of the rake trim. Please contact our webmaster if you find broken links. The upturned leg of the step flashing is behind the vertical drainage plane (house wrap) on the wall or sealed to it with anadhesivemembraneand sheathing tape. While eave trim does need to be cut and folded to fit the fascia and gable, it requires minimal angling to make a proper fit. These water control details are shown in Figures 4and 5. Metal flashing to which bituminous materials are to be adhered shall be primed prior to installation. It is installed at the bottom of a roof and wall intersection, with the lowermost portion formed to deflect water away from the wall. The roof. This leakage will reduce the lifespan of your structure which you might want to avoid. We have tried angling the roof shingles away from the joint, placing the chimneys at the roof ridge, and even building steps into the sides of the chimney to help throw off water. Water-Managed Roof Assembly. Flashing a metal roof may seem daunting at first glance but is relatively painless with these three steps. Tips And Things You Need To Know.
Section R703.8 (R703.8.5 in 2015, 2018, and 2021 IRC) Flashing. Metal flashing is typically exposed but can be installed under the shingles or outer covering. Refer to manufacturers details for installation. This is the reason they hire experienced metal roofing contractors to manage the project for them. Prior to Kloeckner, Nghe worked for Delta Dental, Wells Real Estate Funds, Georgia Institute of Technology and Doosan. If you are flashing a metal roof onto an existing wall, any exposed fasteners should be covered with sheet metal to prevent leaks and provide additional support against wind uplift or other forces that might cause movement in the panel. The following authors and organizations contributed to the content in this Guide. Good thing we have flashing to keep that from happening. When the roof covering is being replaced on an existing roof, new flashing should be installed at roof-wall intersections. Right The water-resistant barrier is layered over the step flashing to provide a complete drainage system, What is Roof Flashing & How to Install it, Direct Water into Gutters with a Kickout Flashing Diverter, Water Moisture Issues: Flashing Windows, Water Leaks, and Kick-Out Flashings, Mass Save Deep Energy Retrofit Builder Guide, GM-1302, Fortified Home General Flashing Guidelines for Steep-Sloped Roofs, Kickout Flashing: How to Flash Troublesome Roof-to-Wall Intersections, TechNote: Rain and Groundwater Management: Reducing the Risk of Water Intrusion and Damages, Step and Kick-out Flashing at Roof-Wall Intersections, Heavy Membranes at Eaves in Cold Climates, ENERGY STAR Certified Homes Implementation Timeline, 2021 International Residential Code (IRC). Kloeckner Metals Hawaiiis Hawaiis most trusted metal roofing manufacturer. Inspect the wall and roof framing to assess existing conditions and develop specific detailing for flashing the intersection of the wall and roof. Guidebook providing useful examples of high performance retrofit techniques for the building enclosure of wood frame residential construction in a cold and somewhat wet climate. The map in Figure 2 shows the climate zones for states that have adopted energy codes equivalent to the IECC 2021. (See code for additional requirements and exceptions.). Figures 6 through 11 show installation of the step and kick out flashing on a new home but many of the steps are similar. The last step is to use screws again, between 12 and 24 inches apart to fasten the eave trim in place. Footnote 14)Any of the following are permitted to be used as alternatives to Item 3.2: a) a roof design that deposits rainwater to a grade-level rock bed with a waterproof liner and a lateral drain pipe that meets discharge requirements per Item 3.2; b) a rainwater harvesting system that drains overflow to meet discharge requirements per Item 3.2; or c) a continuous rubber membrane (e.g.
Step flashingis also known as a soakerorbase flashing. It typically comes as thin pieces of impervious material, metal, in this case, installed at strategic junctures of a roofing system to create a more weather-resistant envelope. Select the right type of flashing, install it correctly, and the roof should last for ages. Flashing of Roof-Wall Intersections in Existing Homes, Existing wall-to-lower roof transition retrofitted with a new strip of fully adhered air control transition membrane, new step flashing, new roof underlayment, and new cladding, Right The step flashing is the correct height above the roof deck, Water Management System Builder Checklist Guide, Wrong The step flashing is not the required height above the roof deck. Install new step and kick-out flashing where an existing roof meets an existing wall as part of a roof replacement. Metal Roof Trims: What Kind of Metal Roofing Dont Forget the Metal Roofing Trim to Go with How Metal Roofing Prices In Hawaii Compare. A specialized type of wall flashing issill flashingor asill pan;it is concealed under windows or door thresholds to prevent moisture leakage. Here, well talk about the process of how to install step and kickout flashing step-by-step. Roof flashing is used to direct water away from certain areas of your roof. If thats the case, read this quick primer on how to install the following metal roof flashings on your home. So, the necessary tools you will be needing are: For every project, taking precautions is a must. The IRC does not have additional requirements for roof-wall flashing in hurricane-prone regions or other high-wind areas. 3.1 Step and kick-out flashing at all roof-wall intersections, extending 4 on wall surface above roof deck and integrated with drainage plane above.12 Where exterior plaster or adhered masonry veneer is provided on the vertical sidewall, the base flashing shall be provided in accordance with this section and Section R703.6.3. Be safe and all the best. Metal Roofing Panels The type of panels you choose will depend on the purpose for your installation. above the roof or higher, per manufacturer's recommendations. There are three ways flashingkeeps water out of roofing: Flashing can be installed like shingles, with one piece lapping another, or it can be sealed to function as one continuous surface. Roof flashing is time-consuming and needs much effort, but it isnt difficult. Water and mold damage is the most commonly seen problem in any structure. See the guide. Press Esc to cancel. So, even where the IRC does not require additional measures, proper installation is more critical in hurricane-prone regions. Lap the existing house wrap or building paper over the top of the step flashing (Figure 11).
Nghe holds a bachelors degree in Business Management with a concentration in Marketing from North Carolina State University. The metal flashing pieces are bent at a right angle with half of the flashing against the wall and the other half interwoven with or underneath the shingles of the abutting roof. In addition, any option in 2009 IRC Section R905.13 is permitted to be used to meet either Item 3.3 or 3.4. The Difference Between Post-Frame and Pre-Engineered Steel Buildings, HOW TO USE GALVALUME FOR YOUR METAL ROOF, Malleable metals such as aluminum, zinc, and stainless steel, Open valleys where shingles or slate must overlap the flashing by at least six inches, Equal slopes with unequal water flow require 1 inch baffles to prevent higher velocity water from forcing its way past the opposite edge of valley flashing, Closed valleys where the intersection roof must have the same slope so shingle-butts lines up at the intersection. Roof-Wall Intersection Water Protection Technology, Professionally Installed Roof/Wall Water Deflector. These metal roof trim pieces are installed at the high point of a roof. Steve Easley details the 2009 IECC residential requirements regarding Water and Moisture issues. below grade and then slopes 0.5 in. Flashing a metal roof onto a wall consists of installing a sheet of special adhesive-backed metal weather resistant barrier material that adheres to both the wall and the sheet metal. If its installed incorrectly, flashing can actually direct waterintoa structure instead of away from it. Its main job is to deflect water away from the seams or joints and in roof valleys where water runoff is concentrated. However, this requires experience and is a time-consuming process. Install and properly integrate flashing at the intersection of an existing wall and roof, as follows: For more onroof/wall connections, see the U.S. Department of Energys Standard Work Specifications. But suppose youd like to tackle the job yourself. Roof flashingis used around projections or discontinuities of, what else? ENERGY EFFICIENCY AND RENEWABLE ENERGY, Forrestal Building Either way, flashing can also be reconfigured with a non-continuous profile to prevent water from entering via surface tension. Flashing keeps things sealed while allowing for this movement. Their purpose is to prevent moisture from intruding beneath sloping panels. Figure 4 shows continuous L-metal flashing integrated with underlayment at roof-wall intersections. These should be long enough to go through the panel and attach it to the houses siding with at least one inch of screw showing above each. To flash a metal roof to a wall, you will need: Metal roofing panels, Flashing tape or self-adhesive flashing strips, Sheet metal screws that are galvanized for exterior use. Base flashing against a vertical sidewall shall be continuous or step flashing and shall be not less than 4 inches (102 mm) in height and 4 inches (102 mm) in width and shall direct water away from the vertical sidewall onto the roof or into the gutter. Flashing can be made of several kinds of materials, but the most flexible and durable are made of metal. Save my name, email, and website in this browser for the next time I comment. Valley flashingis to protect the valley where two roof planes intersect, rather like channel flashing. There are many rumors of how the Kloeckner dog logo originated but let our employees tell you the real Kloeckner Dog Story!
Adrip edgeperforms a similar purpose. Where siding is provided on the vertical sidewall, the vertical leg of the flashing shall be continuous under the siding. 09), Water Management System Builder Requirements, 3. Generally, it will be one of two directions: overhanging or downspout. The shingles must cover the step flashing, any shingles that have already been placed must be removed before the installation of the flashing.
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