Flashing damage is, without a doubt, an indicator that you may need roof repairs or an update, so regularly monitoring the quality of your flashing might save you big down the road. DELETE ABOVE IF NO REGLETS REQUIRED. ADJUST PROVISIONS OF TEXT TO CONFORM WITH LOCAL PRACTICE AND TRADE JURISDICTIONS. Copper is the highest quality and likely the best looking, but additionally costs the most. Aluminum is a good middle of the road option, while flashing membrane is a lower quality but much cheaper if you are repairing on a budget. When considering what you are going to spend on your material, you need to think about the amount of flashing your house needs in total. Most modern construction materials are fairly resistant to moisture penetration. However, many joints between masonry units, panels, or architectural features are not. The effects of natural movement due to settlement, expansion, and contraction tend to compound the problems and may eventually lead to leaks. Flashing is used to prevent moisture from entering at such locations. It is also used to divert to the exterior moisture that has already entered various components of a structure. Installer: A firm with 3 years of successful experience with installation of copper flashing and trim work of type and scope equivalent to Work of this Section.

Since flashing is a necessary component of your roof—it can often be found in the spots of your roof where two surfaces meet, such as your roofing and siding, around places like your windows and skylights. Installation: The cylindrical shape of the flashing can be installed flush with the extruding pipe or vent, and sealed with a high-quality sealant to ensure the system stays secure If you’re installing skylight or roof window flashing, view all our instructional videos on how to install the different varieties we have available. Alternatively, view more information on our blog: what is skylight flashing? Obtain Architect ' s approval for connections to building elements at locations other than indicated in Drawings. Install units plumb, level, square, and free from warp or twist while maintaining dimensional tolerances and alignment with surrounding construction.Description: The horizontal top surfaces of walls are the most vulnerable point for water to enter the wall. There are a number of ways of protecting this surface with copper flashing alone, or in combination with stone or precast concrete. POSSIBLY INSERT SPECIFIC PERFORMANCE REQUIREMENTS BELOW OR ACCEPTABLE PRODUCT LISTING FOR CRUCIAL APPLICATIONS OF SEALANTS. (COORDINATE WITH DIV-7 SECTION "JOINT SEALERS.") DESIGN PROFESSIONAL IS RESPONSIBLE FOR DESIGNING SYSTEM, INCLUDING ANCHORAGE, FASTENER SIZE, AND SPACING.

DELETE BELOW IF NONE OF WORK SUFFICIENTLY COMPLEX TO JUSTIFY SHOP DRAWINGS; EDIT TO DELETE NONAPPLICABLE UNITS. POSSIBLY INSERT PRODUCT-HANDLING ARTICLE WHERE SUBSTANTIAL VOLUME OF HIGHLY FINISHED WORK IS REQUIRED.Smith, Percy Guillemard Llewellyn. Notes on building construction. Part 1. London, Oxford and Cambridge: Rivingtons, 1875. Chapter 10, Plumbers work. Print. A step flashing is a thin, rectangular piece of flashing that is warped at an angle of 90 degrees and applied to create a watertight seal where the roof plane meets a wall. In a spot like this, it is very likely that water could flow down the wall above and past the shingles, therefore, damaging the building below, so this type of flashing correctly installed is important. Install expansion joints at frequency recommended by CDA. Do not fasten moving seams such that movement is restricted. POSSIBLY INSERT QUALITY ASSURANCE ARTICLE HERE FOR LIMITATIONS ON FABRICATORS OR INSTALLERS OF COMPLEX SYSTEMS OF FLASHING, RAIN DRAINAGE, EXPANSION JOINTS, ETC. 1.6 QUALITY ASSURANCE

Flashings and copings are fabricated from cold rolled copper in weights ranging between 16 and 20 ounces per square foot. The required weight depends on the application and is outlined in the discussion related to each detail. INSERT OTHER SPECIFIC INSTALLATION REQUIREMENTS FOR OTHER SYSTEMS AND SHEET METAL ACCESSORY ITEMS SPECIFIED AS WORK OF THIS SECTION. 3.3 CLEANING Roofing accessories installed integral with roofing membrane are specified in roofing system sections as roofing work. Description: Copper flashing is used wherever a wall intersects a roof. Such a system usually consists of copper counterflashing and base flashing in conjunction with roof composition flashing or coping. The counterflashing diverts water to the base flashing, which, in turn, diverts it to the composition flashing. The base flashing is designed to accommodate building movement. It laps the composition flashing at least 4". The composition flashing is extended up a cant strip then up the wall at least 10". Fasten flashing to curb nailers at maximum spacing of 3 inches (75 mm) O.C. Fabricate seams at joints between units with minimum 4-inch (100 mm) overlap, to form continuous, waterproof system in accordance with the "Copper in Architecture " handbook published by the Copper Development Association (CDA).Material: Copper sheet with 060 temper conforming to ASTM B 370 bonded with a proprietary rubber based adhesive, between two layers of fiberglass fabric weighing not less than 0.3 oz per sq. ft. per layer with a minimum of 20x20 threads per inch. If you are installing a vent pipe flashing on a roof whereby you have used Cladco Steel Roof Sheets and are fixing the flashing in place with screws, Cladco supplies a range of Colour Caps. Colours Caps are designed to fit over an 8mm hex head screw, to cover the screw and help to blend in with the Roof Sheet for a more concealed finish. A roofer would commonly use continuous flashing across the bottom of the chimney with step flashing covering the sides. They then need cap flashing to overlap the other flashing to create a complete seal. How to install flashing Selecting the flashing that is right for your home comes down to your budget and the investment you are willing to put forth for a better and lasting material. Here are just a few of the most common options: Through-wall flashing is commonly fabricated by deforming the metal in such a way as to provide bond strength in mortar joints. All through-wall flashing should be set with a bed of mortar above and below the flashing in strict compliance with the flashing manufacturer's specifications.

inch (150-mm) or 12-inch (300-mm) long samples of fabricated products exposed as finished work. Provide complete with specified finish. Cold rolled (to 1/8-hard temper) copper is recommended for most flashing applications. This material offers more resistance than soft copper to the stresses of expansion and contraction. Soft copper can be specified where extreme forming is required, such as in complicated roof shapes. Thermal movement in flashings is prevented or is permitted only at predetermined locations. [12] Flashing is a necessity around several parts of your roof—any one of these areas could be vulnerable to serious leaks and expensive damage from weather problems.Clean exposed copper surfaces, removing substances that might cause abnormal discoloration of metal. The minimum recommended weight for copper through-wall flashing is 12 oz. using "High Yield", or 16 oz. using standard cold rolled copper. Through-wall flashing is used at all points where moisture may enter the wall, and in selected places particularly susceptible to water damage. Copper: Copper flashing is notoriously the most expensive option of the various flashing materials, but for a good reason. Besides being the strongest of the various types of roof flashing, it is perhaps also the most eye-catching—copper is a great color to match the style of most homes.