Fastening

properly secured. Safety harnesses or other special equipment may

FABRAL can supply either screws or nails for fastening into

be required; be sure to Consult OSHA guidelines for compliance with

dimension lumber. Woodgrip screws for use with steel panels are

all safety requirements

galvanized and then coated with an organic polymer for optimum cor-

Do Not walk on panels until all the fasteners are installed

rosion resistance. For best results with aluminum panels, use #300

Metal roofing panels are slippery when wet, dusty, frosty, or oily — Do

series stainless steel screws

Not attempt to walk on a metal roof under these conditions. Wear soft-

The FabrOseal(R) galvanized ring-shank nail, with its premium

soled shoes to improve traction and to minimize damage to the paint

long-life silicone rubber gasket, assures a lasting seal and is the best

finish. Always be aware of your position on the roof relative to any roof

nail available for steel panels when screws are not the method to be

openings, roof edges, co-workers, and penetrations. Installing metal

used by the installer

panels or flashings on a windy day can be dangerous and should be

The correct way to fasten steel panels with nails is to

avoided if possible

drive the nail through the top of the rib so the washer is compressed

securely against the metal. Nail placement must be in the ribs for

Cutting Aluminum Panels

roofing applications to minimize the potential for roof leaks. Over-

To make a cut parallel to the ribs, score the panel deeply with

driving the nail can split the washer and dimple the metal, causing

a sharp utility knife and bend back-and-forth along the score, breaking

leaks

the metal off cleanly. For cuts across the ribs, use straight-cut snips,

electric or pneumatic shears, a portable profile shear, or an electric

nibbler. Some installers prefer utilizing a circular saw with a metal cutting

blade (a fine-tooth hardwood blade, or a standard combination blade

Correct

Under-Driven

Over-Driven

reversed in the saw works also). Light oil or soap on the blade will

make cutting easier

Wood screws with combination metal and neoprene washers has to be installed in the flat area of the panel adjacent to the ribs, and tightened such that the washer is compressed as illustrated above. This will ensure a lasting, leak-proof seal. See pages 4 to 5 for the correct fastener locations. Refer to the fastening schedules in this booklet for the correct fastener locations

Flashing and Trim

Always begin flashing installation from the bottom and work up, so that upper flashings are lapped on top of lower flashings. This will prevent moisture from leaking under the flashings and into the structure. Endlap flashings a minimum of 6" and seal the lap joints with sealant. Extend flashings 4-6" beyond the building, cut along the bend lines, ap- ply sealant, and fold the side flaps in and the top flaps down to cap off the ends. Secure with pop-rivets or stitch screws

Some roof conditions, such as valleys, may require a longer endlap and/or a larger flashing to properly drain moisture from the roof. Factors that influence flashing size, shape, and endlap requirements include roof pitch, roof geometry, slope length, and climatic factors (such as heavy snowfall or rainfall)

Whenever possible, begin trim installation at the downwind end of the roof, farthest away from the source of prevailing winds, to al- low flashing laps to face away from wind-driven rain. Refer to the details in this book for the appropriate location of fasteners and sealants

The flashings and trims shown in this book are standard parts. Custom trims are available to meet your specific design needs. If you need a special trim, please furnish a drawing of the desired shape, in- cluding dimensions and angles, to your Fabral dealer to obtain pricing and availability

Refer to the SMACNA Architectural Sheet Metal Manual for additional information about detailing and installing flashings

Safety

Always work safely when installing metal products and use extreme caution on the roof at all times. Wear gloves and safety glasses to reduce the risk of injury, and use hearing protection when operating power tools. Always be sure that ladders are safely positioned and

Cutting and Drilling Steel Panels

Steel panels may be cut with metal snips, electric or pneu- matic shears, a portable profile shear, or an electric nibbler. Some installers prefer utilizing a circular saw to cut metal panels. Do Not use self-consuming abrasive blades because of the following: 1. Abrasive blades burn the paint and galvanizing at the cut edge, leaving edg- es that are jagged and unsightly and rust more quickly 2. Abrasive blades produce hot metal filings that embed in the paint and cause rust marks on the face of the panel 3. All saw cut panels must be turned face down and cut in a location down-wind and we will away from the building and other panels to avoid embedment of metal filings on other panels 4. All saw cut panels must be thoroughly wiped to ensure the removal of all metal filings. If saw cutting can't be avoided, select a carbide-tipped blade specially designed for cutting light-gage ferrous metal panels. These blades are now available at many home centers and lumber yards. Pre-drilling wall panels gives uniform alignment of screw rows. Be sure to remove drill filings once panels are installed to avoid rust marks from the filings

Building Maintenance

A metal roof has to be inspected annually and cleaned as necessary to maintain its beauty and performance. Any debris or resi- due, including leaves, twigs, and dust has to be cleaned off promptly to prevent moisture entrapment against the metal, which may lead to finish deterioration or premature corrosion. Flashings may need to be re-sealed periodically in order to maintain optimum weathertightness

Proper Storage

Store metal panels indoors when possible; if outdoors, cover and elevate. Elevate one side higher for water drainage. Never cover in plastic; us a tarp that can breath. Allow for air circulation. If a bundle gets wet, break bands and separate sheets; allow sheets to dry com- pletely and only restack if completely dry. Product has to be stored for a maximum of 2-4 weeks before being installed