FAQ -
EAVE FASCIA TRIM - For custom eave drip, specify the amount of the eave that will be covered and specify the pitch. If fascia is desired, be sure that the dimension you order will be hidden by the eave drip.
RIDGE CAP - The ridge cap is used to seal the point at which two upward slopes meet. This can be both along the ridge of the roof as well as a covering for a hip. Either wood grip or self-drilling lap TEK screws can be used, and are applied through the ribs of the metal.
Since debris, insects, and blowing rain can find easy access under the ridge cap, closures are required to either completely or partially seal the opening. Closures under ridge caps come in 3types: solid, vented, and hip tape. Solid closures (“outside closures”) are the same width as the panels. They lock together in a row placed directly under the screws that attach the ridge cap and form a solid, water-tight, air-tight barrier. Vented closures are the same length as the panels, and form a water retardant, insect resistant barrier that allows hot air to escape from the attic, and is better than many of the other more elaborate and expensive venting systems.
END-WALL FLASHING - End-wall flashing is applied where the upward slope of a roof meets a wall. The wall side of the flashing can be covered with siding or counter-flashing, and outside closures are necessary to seal between the flashing and the panel.
TRANSITION FLASHING - The transition flashing prevents leakage at the point where two different roof pitches meet. It must be sealed on the lower side with outside closures and can be sealed underneath the upper panels with inside closures. A similar gambrel flashing is used where the lower pitch is steeper than the upper.
GABLE FLASHING - Gable flashing is used to trim the edge of the roofing panel at the gable end of the roof. It should match the eave drip that extends along the drip edge of the roof. If the panel is allowed to hang over the gable end, eave drip can be used instead.
SIDEWALL FLASHING - Sidewall flashing is applied when the side of the roof butts up against an adjacent wall. The wall side of the flashing can either be covered over with siding or sealed with caulk.
PRE-FORMED VALLEY - Pre-formed valleys use a diverter to prevent water from rushing under panels on the opposite side, instead channeling the water off the roof. Expanding foam closures are often used to ensure a good seal.
PIPE BOOT - Pipe boots provide a watertight seal around roof vents and come in a variety of sizes. They seal with caulk and conform to the shape of the panel ribs.
OUTSIDE CORNER - The corner trim can be used as a gable trim or a corner for metal-sided buildings. Customizing corners is often necessary due to their landing on a panel rib. These can be ordered as custom trim items by specifying custom dimensions.
GABLE RAKE - When used as a gable rake, it runs parallel to the ribs of the roof panel, and is attached with screws running through the ribs of upright siding. The roof side can be sealed with butyl sealant.
DRIP CAP & J-CHANNEL - The drip cap is commonly used to trim out the bottoms of panels over doorways and windows and occasionally takes the place of a rat guard. J-channel is used to cap raw panel edges where run-off is not a problem and is most commonly used to trim around the bottom, sides, and occasionally the top of windows and doors, and also to cap the top sides of skirting.
RAT GUARD - Base drip seals off the bottoms of panels at the floor level, which helps to prevent the entrance of rodents and insects, as well as providing a base for the setting of panels.
TRACK COVERS - Sliding door track covers fit over the door track and under the panels to hide the track, give a neat appearance, and shed water over the door.
Panel installation should begin at the gable end of the roof opposite the prevailing rain-bearing wind (this will provide added protection against wind-driven rain being forced under the laps). Measure one panel width from the roof edge. At this point, chalk a line from ridge to eave. Place the leading edge of the first panel along this line. It is extremely important that this panel be laid square to the eave and ridge so that the remaining panels will line up square on the roof frame. It is recommended to have a person at the eave and at the ridge to ensure that the proper panel coverage is being maintained across the roof. Also, be sure that the panels are properly side-lapped.
In applications where end-lapping is necessary, the upper panel on the slope should lap over the panel that is lower on the slope by about 12 inches. Lesser roof pitches require a greater amount of panel overlap. All end-lap applications should use 2 horizontal rows of butyl sealant tape across the panel and proper fastening to provide a maximum water seal.
An overhang of 2 to 3 inches on the eave is recommended to provide a drip edge, while only 1-inch overhang is necessary where gutters are used. The open panel ribs at the eave can be sealed with inside closures. For maximum weather tightness, a row of butyl tape can be applied above and beneath the closure material.
To cut panels across the profile:
Carefully mark where the panel is to be cut, and, using a straightedge, score deeply down the length of the panel with a sharp-pointed utility knife. Folding the panel along the score mark, and bending back again if necessary, should produce a clean break in the panel.
WARNING—Clean all metal shavings and particles off the roof to avoid rust stains.
Allsteel carries screws in 2 different lengths: 1½ inches and 2 inches. The 1½ inch variety is the best all-purpose size. The table below can be used to figure approximate quantities of screws for various purlin spacings and sizes of roofs. Screws are available in quantities of 250.
SCREW (purlin) SPACING
linear ft of panels
in your order 12 inch 18 inch 24 inch
50 270 180 135
100 540 360 270
200 1080 720 540
300 1620 1080 810
400 2160 1440 1080
500 2700 1800 1350
600 3240 2160 1620
700 3780 2520 1890
800 4320 2880 2160
900 4860 3240 2430
1000 5400 3600 2700
1100 5940 3960 2970
1200 6480 4320 3240
Again, be sure to clean away any metal shavings left after applying screws to the panels to prevent rust stains.
Sales tax: All orders picked up at Allsteel are subject to state sales tax. Tax exemptions should be verified prior to delivery or customer pickup.
Warrantied products: There is a 40 year warranty on most materials manufactured from painted coil stock and a 25-year warranty on Galvalume material. Ask for details.
Indemnity: All prices and designs are subject to change without notice. Disclaimer: While we have made every attempt at accuracy in this manual, we are not responsible for typographic, printing, or technical errors.
Oil-Canning: A wave-like appearance in the length of the panel is a common and often unavoidable phenomenon in metal panels, like Tuff-Rib roofing, that have large, flat areas within the panel. It is therefore not a defect, nor a cause for replacement.
Return policy: All panel and trim orders are considered the property of the customer and are non-refundable once they are manufactured.
For custom eave drip, specify the amount of the eave that will be covered (dimension “a”), and specify the pitch. If fascia is desired, be sure that the dimension you order will be hidden by the eave drip.
The ridge cap is used to seal the point at which two upward slopes meet. This can be both along the ridge of the roof as well as a covering for a hip. Either wood grip or self-drilling cap TEK screws can be used, and are applied through the ribs of the metal.
Vented closures are the same length as the panels, and form a water retardant, insect resistant barrier that allows hot air to escape from the attic, and is better than many of the other more elaborate and expensive venting systems.
The transition flashing prevents leakage at the point where two different roof pitches meet. It must be sealed on the lower side with outside closures and can be sealed underneath the upper panels with inside closures. A similar gambrel flashing is used where the lower pitch is steeper than the upper.
Rake trim is used to trim the edge of the roofing panel at the roof's gable end. It should match the eave drip that extends along the roof's drip edge. If the panel is allowed to hang over the gable end, eave drip can be used instead. Butyl tape between the trim and panel eliminates leaks. When used as a gable rake, it runs parallel to the ribs of the roof panel and is attached with screws running through the ribs of upright siding. The roof side can be sealed with butyl sealant.
End-wall flashing is applied where the upward slope of a roof meets a wall. The wall side of the flashing can be covered with siding or counter-flashing, and outside closures are necessary to seal between the flashing and the panel. Specify which trim piece is needed and the roof pitch when ordering.
Sidewall flashing is applied when the side of the roof butts up against an adjacent wall. The wall side of the flashing can either be covered over with siding or sealed with caulk. Butyl tape should be applied where the “foot” of the flashing attaches to the roof.
Pre-formed valleys use a diverter to prevent water from rushing under panels on the opposite side, instead channeling the water off the roof. Expanding foam closures are often used to ensure a good seal.
The Rake and Corner trim can be used as a gable trim or a corner for metal-sided buildings. Customizing corners is often necessary due to their landing on a panel rib. These can be ordered as custom trim items by specifying custom dimensions. Be sure to take into account the 3/4" “head space” when figuring custom dimensions.
When used as corner trim, the GR-2 straddles the ribs of the panels where they meet at the corner of the building. The Tuff-Rib outside corner also serves as a gable rake.
The drip cap is commonly used to trim out the bottoms of panels over doorways and windows and occasionally takes the place of a rat guard. J-channel is used to cap raw panel edges where run-off is not a problem and is most commonly used to trim around the bottom, sides, and occasionally the top of windows and doors, and also to cap the top sides of skirting.
Base drip seals off the bottoms of panels at the floor level, where it helps to prevent the entrance of rodents and insects, as well as providing a base for the setting of panels.
Sliding door track covers fit over the door track and under the panels to hide the track, give a neat appearance, and shed water over the door.
Concrete Slab Foundation: This is the most common type of home foundation, consisting of concrete poured directly onto the ground.
Crawl Space Foundation: Constructed on blocks with a small space between the floor joists and the ground. Concrete pillars are used for added reinforcement and structural support.
Basement Foundation: Basement foundations can be built with blocks or poured concrete. Concrete pillars support the above-ground structure, leaving standing-height space underneath the home. These foundations tend to be dug at least eight feet above the home's footing, leaving sizable space beneath the home for living or storage.
Pier Foundation: A pier foundation is a collection of large-diameter cylindrical columns that support the superstructure and transfer large superimposed loads to the firm strata below. It stands several feet above the ground.
