CertainTeed WeatherBoards™ Installation Manual
CertainTeed WeatherBoards™ Fiber Cement Siding Installation Manual Table of Contents Glossary ............................................................................2 Top 10 Fiber Cement Installation Tips ..............................4 Section 1: Before You Begin ...........................................6 First Steps to a Successful Project ...............................6 Section 2: Estimating .....................................................7 Siding ..........................................
CertainTeed WeatherBoards™ Fiber Cement Siding Installation Manual Glossary Because this manual was written for building professionals, we have freely used the language and jargon of the siding industry. To avoid confusion, we thought it a good idea to share our understanding of each of these terms with you. Expansion—Commonly refers to building products expanding due to heat build-up or moisture entering the product, especially as outside temperature changes.
CertainTeed WeatherBoards™ Fiber Cement Siding Installation Manual Keyway—A recess or groove in a manufactured shake or shingle siding panel. Sealant—A waterproof filler and sealer that is used in building and repair to make a surface watertight. Lap—Where two siding panels join horizontally, one over the other. Sheathing—Sheets of plywood, exterior gypsum board, or other material nailed to the outside face of studs as a base for exterior siding.
CertainTeed WeatherBoards™ Fiber Cement Siding Installation Manual Top 10 Fiber Cement Installation Tips DO 1 Before You Begin XXReview this manual in its entirety and all applicable building codes prior to installation. 2 Storage & Handling XXKeep XXWear appropriate safety equipment—dust mask or respirator, eye protection, hard hat, and cutresistant gloves as appropriate. siding covered, off the ground on a clean, flat, and level surface that is protected from direct exposure to weather.
CertainTeed WeatherBoards™ Fiber Cement Siding Installation Manual DO 7 Cutting XXUse appropriate personal protective equipment (PPE). XXRefer XXCut to page 18 for details. DON’T XXDo not score and snap fiber cement. XXDo not cut fiber cement without proper ventilation. fiber cement outdoors when possible. XXUse a polycrystalline diamond-tipped fiber cement blade for circular, miter, and table saws. XXWhen using a circular saw or mechanical shears, cut fiber cement siding face down.
CertainTeed WeatherBoards™ Fiber Cement Siding Installation Manual Section 1: Before You Begin Please read the instructions completely. The installation techniques in this manual describe and illustrate the steps involved in installing WeatherBoards™ Fiber Cement siding, soffit, and trim. Their purpose is to provide detailed information and how-to tips that will simplify the installation process.
CertainTeed WeatherBoards™ Fiber Cement Siding Installation Manual Section 2: Estimating Siding Use the illustrations and formulas below and enter totals on the estimating form in this section. These formulas apply for both horizontal and vertical installations. NOTE: Depending on the pitch of the roof, gables and more cut-up areas will produce a higher scrap rate. Rectangular wall surfaces Measure height (excluding gables). Measure width (including doors and windows).
CertainTeed WeatherBoards™ Fiber Cement Siding Installation Manual Trim Insert the number of lineal feet or the number of pieces 7/16" (actual) Trim/Fascia 3-1/2" 5-1/2" 7-1/4" 9-1/4" 11-1/4" Front Left Right Rear 4/4" (nominal) Trim 2" 3" 4" 6" 8" 10" 12" 8" 10" 12" Front Left Right Rear 5/4" (nominal) Trim 3" 4" 5" 6" Front Left Right Rear Restoration Millwork Exterior Trim One-Piece Corners 5/4" x 4" 5/4" x 4" J-Pocket 5/4" x 6" 5/4" x 6" J-Pocket Inside Corner Front Left Ri
CertainTeed WeatherBoards™ Fiber Cement Siding Installation Manual 5/4" (nominal) Trimboards 4" 4" J-Pocket 6" 6" J-Pocket 8" 10" 12" 16" Front Left Right Rear Decorative Trim Boards Brickmould J-Channel #49 Crown #47 Crown #45 Crown Rams Crown Base Cap Rake Quarter Round Drip Cap Shingle Mould Bed Mould Lattice Sill Nose Sill 356 Casing RB3 Casing Back Band Adjustable Back Band Skirtboard Front Left Right Rear Front Left Right Rear Front Left Right Rear Front Left Right Rear
CertainTeed WeatherBoards™ Fiber Cement Siding Installation Manual Estimating Form Siding1 Areas not to be covered ft2 Gable ends ft2 Dormer sides ft2 Upper gambrel walls ft2 Total wall surface area ft2 (A) Garage doors/sliding glass doors ft2 x .5 = (B) Subtract B from A for total net surface area ft2 Soffit ft2 Porch ft2 Ceiling ft2 Fasteners 1 Walls Nail gun nails coils Hand nails lbs Screws lbs If you are using multiple profiles on the same project (e.g.
CertainTeed WeatherBoards™ Fiber Cement Siding Installation Manual Coverage Chart This chart indicates the number of pieces of WeatherBoards Fiber Cement siding you will need. It does not include waste, and all numbers have been rounded up. LAPS SHAPES 5-1/4" 6-1/4" 7-1/4" 8-1/4" 9-1/4" 12" 8-1/4” Perfection Shingles PANELS Random Sq. Edge 16", Random Sq. Random Staggered Edge, Half-Rounds Sq. Edge & Octagons 4' x 8' 12" 4' x 9' 4' x 10' Overlap 1.25 1.25 1.25 1.25 1.25 1.25 1.25 7.00 9.
CertainTeed WeatherBoards™ Fiber Cement Siding Section 3: Safety Installation Manual Ladders New OSHA Fall Protection regulations are in effect. Ventilation When fiber cement is cut or drilled, it will create dust. This dust may contain crystalline silica, which can pose a health risk. To ensure adequate ventilation, work outdoors or use mechanical ventilation to reduce potential exposure to below OSHA Permissible Exposure Limits (PELs).
CertainTeed WeatherBoards™ Fiber Cement Siding Installation Manual XXFiber Tools One of the most important things you can do to make the job go smoothly is to make sure that all tools are in good shape and everyone understands how to use them properly. XXMaintain all hand tools and equipment in a safe condition and check regularly for defects. Do not use broken or damaged tools. XXUse double insulated tools or ensure that all tools are grounded.
CertainTeed WeatherBoards™ Fiber Cement Siding Installation Manual Air Compressors Air compressors can be very dangerous and cause serious injury if used improperly, so before you begin to use your air compressor, set it up properly to ensure safe operation. XXLocate the air compressor in an area that is free and clear from dust and debris. Excessive dust and debris will clog the filter and may even damage the internal components of the compressor.
CertainTeed WeatherBoards™ Fiber Cement Siding Installation Manual Proper Handling Corner Protectors Reduce the risk of marring the surface. XXAlways carry fiber cement boards by holding the narrow edge. XXAlways use corner protectors when banding fiber cement siding or trim. XXThe outside face of CertainTeed WeatherBoards Fiber Cement Cedar Lap siding with ColorMax ® finish is covered with a patented protective film.
CertainTeed WeatherBoards™ Fiber Cement Siding Fiber cement shears typically have a flat side and a bevel side; consult the shear’s user guide for proper cutting technique. When using shears, take care to avoid delamination of the product layers at the edges. XXGuillotine Installation Manual Manufacturers include: Shears— Guillotine shears can cut cleanly, without distorting the edges of the siding.
CertainTeed WeatherBoards™ Fiber Cement Siding Installation Manual Fastening Accessories XXPneumatic The right accessories can improve the overall quality of the siding project and make the job go faster. Some of the accessories CertainTeed recommends include: Nailers—Siding and roofing nailers can be used to fasten WeatherBoards Fiber Cement siding. They should not be used to fasten fiber cement trim. Use finish nail guns to install trim.
CertainTeed WeatherBoards™ Fiber Cement Siding Section 6: Cutting Installing fiber cement siding requires carpentry skills and knowledge that are unique to this material. There are two key techniques to the way the material is cut and fastened. Also, good wall preparation is extremely important to a quality job, so much so that we have devoted a full section to it starting on page 27. Installation Manual Requirements XXCut fiber cement board face down when using a circular saw or mechanical shears.
CertainTeed WeatherBoards™ Fiber Cement Siding XXHandle narrow and notched pieces carefully to avoid breakage. XXWhen cutting beaded siding profile, start the cut against the bead. XXWhen cutting CertainTeed WeatherBoards Fiber Cement Cedar Lap Siding with CertainTeed ColorMax® finish, leave the protective film in place until the siding is nailed to the substrate; then remove it before applying the next course.
CertainTeed WeatherBoards™ Fiber Cement Siding Acceptable Fastening Alternatives Screw Driver Installation Manual Fastening to Structural Materials Fastening to Wood The maximum stud spacing allowed is 24". Refer to local building codes for structural requirements. Phillips Nails must penetrate a minimum of 1-1/4" into the structural framing. The minimum penetration may include the thickness of the structural sheathing (7/16" OSB or 1/2" plywood).
CertainTeed WeatherBoards™ Fiber Cement Siding Fastening to Metal Framing Fiber cement siding can be installed over metal framing. Fiber cement must be attached to the metal framing members. Screws must penetrate into the metal framing a minimum of 1/4" or three threads. Self-tapping, corrosive-resistant, ribbed bugle-head screws specifically designed for use with fiber cement siding are recommended. You may also use corrosion-resistant pneumatic pins to fasten the siding to metal framing.
CertainTeed WeatherBoards™ Fiber Cement Siding Installation Manual Alternative Wall Systems Fastening Requirements for Atypical Walls Non-vertical Walls WeatherBoards Fiber Cement can be installed on nonvertical walls when the walls are no more than 30° off the vertical, or no less than a 60° angle, measured from the plane of the ground, and the wall is not a functional roof above occupied space. The top of the wall cannot be higher than 30' above grade.
CertainTeed WeatherBoards™ Fiber Cement Siding Installation Manual Concrete Masonry (CMU) or Poured Concrete Walls Consult applicable building codes before installing WeatherBoards Fiber Cement siding on CMU or a concrete wall. The CMU or concrete wall must be able to resist all loads transferred from the siding. Also, comply with the requirements listed in the most recent version of this manual. The recommended fastening methods are listed below.
CertainTeed WeatherBoards™ Fiber Cement Siding Structural Rainscreens (Steel Studs/Steel Furring Strips) Rainscreen systems are designed to promote airflow and moisture management behind exterior cladding products. They must be designed by an architect, designer or project engineer. Non-structural lathe/furring strips are used as a spacer to establish the rainscreen and are not intended to substitute as a framing member for direct attachment of fiber cement siding.
CertainTeed WeatherBoards™ Fiber Cement Siding Installation Manual XXThe Insulated Concrete Forms XXFor Typically, an Insulated Concrete Form (ICF) wall system relies on a plastic strip to provide the attachment point for exterior cladding. Since ICF wall systems are manufactured proprietary designs, only the ICF manufacturer can determine if the system can accommodate the applied loads created by attaching fiber cement siding.
CertainTeed WeatherBoards™ Fiber Cement Siding Installation Manual Fastening Requirements for Weatherboards Fiber Cement Siding Basic Fastening Schedule1,2 Product Fastener3 Fastening4 Method Type Spacing 6d siding nail (0.095 x 0.235 HD x 2" long) 6" edges, 12" in the field into framing Wood studs 2x4 min. 16" o.c. max. 6d siding nail (0.095 x 0.235 HD x 2" long) 6" edges, 12" in the field into furring Wood furring 2x4 min. 16" o.c. max. 6d siding nail (0.095 x 0.
CertainTeed WeatherBoards™ Fiber Cement Siding Installation Manual Section 8: Wall Preparation and Sheathing XXIn Before installing WeatherBoards™ Fiber Cement Siding, review and comply with all local building codes and regulations regarding wall construction, including the proper use of framing (24" o.c. max.), weather-resistant barriers, flashings, and other building materials and systems.
CertainTeed WeatherBoards™ Fiber Cement Siding CertainTeed does not provide instructions for wall design or assembly that specifically relates to the fastening requirements for re-establishing a structural fastening surface. However, FastenMaster® provides two documents to assist in successfully re-establishing a structural fastening system over non-structural sheathing. These reports must be used in combination with ICC-ES Evaluation Report ESR-1668 to determine attachment requirements.
CertainTeed WeatherBoards™ Fiber Cement Siding Installation Manual Flashing CertainTeed highly recommends the use of flashing to ensure a long-lasting, weather-resistant installation. XXInstall CertaWrap flashing tape around all doors, windows, rake boards, and other areas where needed. Refer to installation instructions at www.certainteed.com for more information. XXApply drip cap, Z-flash, water diverter, and butt end/ joint flashing as appropriate.
CertainTeed WeatherBoards™ Fiber Cement Siding 4. Cut two strips of BA flashing for the sides (jambs) of the window. Jamb flashing tape should extend a minimum of 3" above the top of the jambs of the window unit and a minimum of 1" beyond the bottom flashing tape installed in step #2, covering the width of the previously installed flashing at the base. Slowly peel release paper off as you press the flashing in place. Ensure the flashing covers all nails and mounting slots on the window’s mounting flange.
CertainTeed WeatherBoards™ Fiber Cement Siding Installation Manual Fastening Paint/Primer XXNails: Use a 100% acrylic latex paint or primer applied according to the paint manufacturer’s recommendations. Corrosion resistant or stainless steel, 16 ga. finish nails. Nail length must allow penetration of at least 1" into solid wood. XXScrews: Corrosion resistant or stainless steel. XXSquare Fastening Schedule XXNail Number of Fasteners Spacing 4" wide or less 2 12" to 16" o.c.
CertainTeed WeatherBoards™ Fiber Cement Siding Band Boards: XXInstall 7/16” fiber cement trim over furring strips with the appropriate flashing. XXButt the ends of the trim and nail every 12" to 16". Rakes and Frieze Boards: XXButt the ends of the trim and nail through the trim substrate and siding into the framing or into a wood substrate every 12" to 16". XXLeave 1/8" between the siding and the trim when you install the siding. XXCaulk between the siding and the trim.
CertainTeed WeatherBoards™ Fiber Cement Siding Installation Manual Blind Fastening Face Fastening 1. Make sure the panel overlaps 1-1/4"; leave a gap of 1/8" from all trim before fastening. Always caulk between the siding and the trim. 1. Make sure the panel overlaps 1-1/4"; leave a gap of 1/8" from all trim before fastening. Always caulk between the siding and the trim. 2. Place the fastener 1" from the top of the panel and no closer than 3/8" from the edge. 2.
CertainTeed WeatherBoards™ Fiber Cement Siding Installation Manual Installation Aligning the Starter Strip Mark a Starting Chalk Line You must use a starter strip with lap siding. Except when using vinyl undersill trim as a starter, the starter strip must be a minimum of 2" wide and 1/4" to 5/16" thick. Establish a straight, level reference line to guide the positioning of the starter strip and the first course of siding. Align the top of the starter strip with the chalk line and fasten.
CertainTeed WeatherBoards™ Fiber Cement Siding Installation Manual NOTE: Check local code requirements for recommended height of skirtboard above the finished grade. XXGlue scarf joints between the pieces to help control separation caused by expansion and contraction. Gluing the joints moves the expansion and contraction out to the end. XXFastener heads should be flush with the surface of the skirtboard or slightly indented and no closer than 3/4" from the end and edges of the board.
CertainTeed WeatherBoards™ Fiber Cement Siding Butt and End Joint Application There are three ways to fasten butt and end joints: 1. Into solid framing 2. Into structural sheathing Butt End/Joints Fastened into Solid Framing or Structural Sheathing Butt end/joints should be installed with factory-sealed or factory-prefinished ends butted together in moderate contact. We recommend that butt end/joints be fastened into a stud or framing member.
CertainTeed WeatherBoards™ Fiber Cement Siding Butt End/Joint Covers Lap siding butt joint covers, or H-covers, may be used for aesthetic purposes and are available in different sizes and designs. If you choose to use a joint cover, use the correct size for the siding that you are installing. Follow the specific joint cover manufacturer’s instructions. Regardless of joint cover design: XXUncoated metal joint covers are not acceptable.
CertainTeed WeatherBoards™ Fiber Cement Siding Laced (Prairie-Style) Corners Laced or prairie-style corners, which are frequently used on single-story homes, emphasize the horizontal lines of the siding. Laced corners are created by mating each successive course of siding with its counterpart on the adjoining wall. Traditionally, this involved fitting each course of siding, marking the overlap, and removing the marked piece to make the sloped cut corresponding to the bevel of the opposite course.
CertainTeed WeatherBoards™ Fiber Cement Siding Installation Manual Perfection Shingles 1. Install the 1st course as described for lap siding. Perfection Shingles are installed identically to lap siding with the exception of the following: 2. When you install the 2nd course, rotate the panel 180° and fasten. To achieve a random pattern, Perfection Shingles must be installed with every other course rotated 180°. 3. Install the 3rd course with the panel in the same direction as the first, and so on.
CertainTeed WeatherBoards™ Fiber Cement Siding Installation Manual Nailing Guide for Random Square Siding Trimboard 1/8" gap for caulking 1 2 Do not nail in this area 2 33 1 1 2 16" 3 3 16" Nail 1" above every other keyway Panels are offset 16" Starter Strip To ensure that the keyways are fully backed by fiber cement, install the first course of Random Square Straight Edge and Staggered Edge siding over a full starter course of 8-1/4" lap siding.
CertainTeed WeatherBoards™ Fiber Cement Siding First Course Installation Manual 4. Continue nailing 1" above every other keyway. Finish the panel with a nail at the right edge. First Panel 1. Start at the left side of the wall. 2. Remove a bit of the left edge of the panels so that the entire panel butts up flush against the trim. 3. Place the first nail 1" above the top of the keyways and no closer than 3/8" from the edge of the panel. This will ensure the nails are concealed.
CertainTeed WeatherBoards™ Fiber Cement Siding 3. Refer to the following guidelines for the specific product exposures: Installation Manual Individual Shakes a. Random Square Straight Edge 5" Exposure: Measure up 5" from the bottom of the panel or measure up 5" from the top of the panel and make a mark on the wall.
CertainTeed WeatherBoards™ Fiber Cement Siding Starter Strip You can use fiber cement, vinyl utility trim, or PVC skirtboard as a starter strip. It must be at least 2" wide and 1/4" to 5/16" thick. When starting installation at ground level, establish a straight, level reference line (chalk line) to guide the positioning of the starter strip and the shake starter course. 1. Find the lowest point of the sheathing and make a mark that is 1" above the lowest point.
CertainTeed WeatherBoards™ Fiber Cement Siding Installation Manual 4. Individual Shakes are designed and installed to create a straight-edge, 8" exposure finished application. Alternative applications, such as staggered edge, can be achieved with the Individual Shakes following the basic steps noted earlier. However, the exposure should never be less than 6-1/2" and the fastening location should be kept 9" from the bottom.
CertainTeed WeatherBoards™ Fiber Cement Siding Installation Manual Using the starter strip as a guide, attach the starter course so that the bottom edge will project at least 1/4" below the bottom edge of the starter strip. Positioning and Nailing Guide for Octagons and Half-Rounds 16" o.c. 21" 1.0" 7" XXPlace the fastener 1" above the top of the keyway and no closer than 3/8" from the edge. XXFasteners must penetrate a minimum of 1-1/4" into the structural framing.
CertainTeed WeatherBoards™ Fiber Cement Siding Installation Manual Second Course 1. Starting at the left side, locate the first full panel installed on the first course. Drop a plumb line to find center of gable 2. Offset the 2nd course 21" (3-1/2 tabs) from the first full piece. This horizontal shift will vertically align the center of each tab on the 2nd course with the keyways of the 1st course. Finding the Center of Gable 3.
CertainTeed WeatherBoards™ Fiber Cement Siding Subsequent Courses in Gable Areas 1. Make a rake angle template for gable: a. Hold a short piece of siding along the starter strip against the left edge of the gable. b. Hold a second piece of siding against the trim at the rake angle of the gable. c. Use this template as a guide when you cut the panels to fit the gable.
CertainTeed WeatherBoards™ Fiber Cement Siding Fiber Cement Vertical siding (panels) may be installed only over a flat, vertical wall surface. Installation Manual XXWeatherBoards CertainTeed has reviewed the application of our products with the following trim reveal systems: XXAll 1. Easy Trim Reveals (highly recommended); www.easytrimreveals.com; 877-973-8746 XXVertical 2. Tamlyn; www.tamlyn.com; 281-499-9604 edges of vertical panels must be backed by framing or solid blocking for attachment.
CertainTeed WeatherBoards™ Fiber Cement Siding Installation Manual 3/8" min. from edges Fiber cement siding 6" 12" Insulation Exterior wall sheathing Concrete slab Weatherresistant barrier 1/4" 2" 6" Batten Fastening Vertical Siding Final grade 6. Space fasteners a maximum of 6" o.c. on all edges and 12" o.c. at intermediate framing members. Refer to ICC-ES ESR-1668 for specific fastening requirements. 7. Paint all field-cut edges. Attaching Vertical Siding to Wood 8.
CertainTeed WeatherBoards™ Fiber Cement Siding Installation Manual Section 13: Soffit Board and Batten Application WeatherBoards Fiber Cement siding can also be applied in a board and batten style. You can use wood, fiber cement, composite lumber, or cellular PVC as battens. If you install battens cut from fiber cement, paint or stain the cut edges.
CertainTeed WeatherBoards™ Fiber Cement Siding Installation Manual Ventilation Determining Soffit Ventilation (Example) Proper attic ventilation is important for any home. The 2009 International Building Code (IBC) Section 1203 Ventilation furnishes a basic guide for determining proper ventilation for any home. The information provided here may under certain circumstances not result in enough ventilation. Therefore, the calculation provided should be used only as a guide. 1.
CertainTeed WeatherBoards™ Fiber Cement Siding Installation Manual Installation 1. WeatherBoards Fiber Cement soffit should be applied to structural framing members spaced no more than 24" o.c. with the longest dimension perpendicular to the framing. Venting to outside of eaves Vented soffit panel Shim Fascia Subfascia (wood) Nailer board Section 14: Porch Ceiling Panels WeatherBoards Porch Ceiling panels are specifically designed to be used in porch and/or ceiling applications.
CertainTeed WeatherBoards™ Fiber Cement Siding Installation Manual Preparation Installation XXPorch Position fasteners no closer than 3/8" from panel edges and 2" away from corners. Ceiling Panels must be installed over solid wood or steel framing spaced no more than 24" o.c. Additional framing may be required for proper fastening. Be sure all edges are supported by framing. 6" 2" 6" 2" 24" o.c.
CertainTeed WeatherBoards™ Fiber Cement Siding Installation Manual Section 15: Finishing XXDo Caulking XXBefore Use a high quality, exterior-grade caulk or sealant. For 4/4 and 5/4 trim, use caulk that complies with either ASTM C834 (latex) or ASTM C920 (urethane). The caulk or sealant should be color matched or paintable. It should be compatible with both fiber cement siding and the materials used for the trim. Check the gloss and texture of the caulk to make sure it is compatible with the paint.
CertainTeed WeatherBoards™ Fiber Cement Siding Painting All WeatherBoards Fiber Cement Siding, Soffit, and Trim is sealed with CertainTeed’s FiberTect® Sealer/Primer. When the edges of field-cut fiber cement siding meet up with trim boards, the edges must be coated with a high-quality 100% acrylic latex paint or primer, and caulked. In all other locations, field-cut edges should be coated with a high-quality 100% acrylic latex paint or primer, but NOT caulked.
CertainTeed WeatherBoards™ Fiber Cement Siding Installation Manual Washing Clearances Depending on locale and climate conditions, the siding may be subject to occasional accumulations of dirt. To keep the siding attractive, we recommend periodic washing (every 6 to 12 months). Use tap water to which a moderate amount of household cleaner has been added. Apply the solution with a cloth, sponge, or soft brush (as a car wash brush). Less streaking will result if the siding is washed from bottom to top.
CertainTeed WeatherBoards™ Fiber Cement Siding Before you begin to caulk, remove any dust or debris. Caulk wherever siding meets the trim vertically at the corners and around windows and doors. Do not caulk where the siding is installed into J-channel or a pocket/ accessory. Follow the caulk manufacturer’s application instructions.
CertainTeed WeatherBoards™ Fiber Cement Siding Installation Manual Surface Preparation What Can Be Done about It? The degree and type of required surface preparation depends on the condition of the old finish. Loose paint material should be removed by sanding and scraping. The surface should be cleaned before painting as described in the Washing section. If the old surface is sound, re-priming is typically not necessary.
CertainTeed WeatherBoards™ Fiber Cement Siding Installation Manual Notes 59
CertainTeed WeatherBoards™ Fiber Cement Siding Notes 60 Installation Manual
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