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Handling
Use extreme caution handling ABM Panels. Improper handling may cause bodily injury or material damage. A forklift can dent or puncture the underside of the ABM Panel. We recommend that a spreader device is used on the forklift for bundles over 20 feet in length to avoid bending the ABM Panels.
Care should also be exercised to protect the finish when lifting individual panels from the stack or bundle. Dragging of individual sheets from the bundle can scratch the surface and reduce the paint performance. The paint finish of ABM Panels is tough enough to withstand usual weather conditions but can be scratched and abraded if care is not taken. The panel edges must be protected at all times during the unloading and handling process to assure good fitting and good looking lap joints on the finished installation.
Roof Purlin Caution
Green or wet oak purlins are not recommended due to an acid in oak which can cause the metal to rust prematurely. Also on a reroof job where a slate roof has been on previously, metal is known to rust prematurely due to residue on the purlins from the slate. Also, treated purlins are not recommended. If the above mentioned purlins are to be used, a barrier like double bubble reflective insulation, #30 felt, or Post and Peel should be used between the purlins and metal sheeting.
Caution must be taken to inspect purlins for knots, and rotten or soft spots. Purlins must be solid enough for fasteners to hold properly and to withstand the applicant’s weight. Persons working on the purlins can fall through. Purlins should be at least a 1” solid wood for screws to hold properly. It is not recommended to install insulation, besides double bubble, between purlins and roofing panels. This will not allow panels to be on solid wood.
Cutting and Trimming
There will always be a certain amount of cutting and trimming necessary on the job site. Whether cutting with the rib or against it, use an offset hand snips or a Turbo Shear. For even better results, cutting may also be accomplished by a portable shear profiled to conform to the ABM Panels for perfect across-the profile cutting. Using a cutting torch, steel cutting blade, abrasive blade or a Carborundum Blade with a saw is not recommended and voids the warranty. Also care should be taken to brush off all particles after installation to further reduce the possibility of rust marks and bleeding on the panel after it is installed.
Failure to comply with the above procedures relieves A.B.Martin Roofing Supply LLC of responsibility for any resulting damage to, or deterioration of, the finish and voids the paint warranty.
Caution: Be extra careful when working with roofing and siding. Safety glasses and other safety equipment is recommended and should be worn by the worker.
Roofing Installation Sequence 
Begin laying the roofing panels on the end of the building away from the prevailing wind so the side lap seams shall face away from the prevailing wind-driven rain. This provides extra security against water penetration. The first panel determines the alignment of all remaining panels on the roof, so extreme care should be taken to accurately square the first sheet. The over lapping rib edge should be flush with the edge of the roof (Detail “A”), and the panel should overhang the eaves approximately two inches to provide proper drainage. The side rib with the drain channel should face the direction in which the sheets are being laid down (Detail “B”). When the panel is positioned, it should be fastened through the first rib, top and bottom. The ABM Panel should be attached completely before starting the next panel.
A tip for assuring straight alignment for successive rows of panels is to stretch and snap a chalk lines on the bottom purling from one gable end to the other. Than lay the next sheet, measure from the end of the sheet to the chalk line, this will help keep bottom edge strait.
If roof requires more than one horizontal row of panels, temporarily fasten at two points, not the ends, along main middle ribs of panel #2 above and end lapping over panel #1. Align both panels with chalk line, permanently fasten when all panel are in line. Install panel #3 next to panel #1 side lapping the ABM Panel feature. Install panel #4 above panel #3. It is important to check alignment from ridge to eaves on every sheet. Permanently fasten when the panels are in line. Refer to Figure “1”.
Figure ”2” shows the proper sequence for the installation of one row of ABM roofing.
Fastening
Acceptable fasteners include such items as: Sealtite wood binders, Evergrip 304 stainless steel, Bi-Metal screws or equivalent. All must have an EPDM sealing washer and should be mechanical galvanized and painted to match to the roofing and siding colors. Metal to wood screws with combination metal and EPDM sealing washers should be mechanically driven into the valley or the bottom flat surface immediately adjacent to the major rib on one side or the other for both roofing and siding panels. (Detail “D” & “G”). Screw length should allow a penetration of one inch on side walls and 1½” for roofing. See Roof Purlin section.
Millings or filings will occur from installing the screws. Care should be taken to brush off all particles after installation to reduce the possibility of rust marks and bleeding on the panel.
 
Detail G
Drive the screw through the steel so the washer is compressed securely against the metal. Refer to Detail “D”. DO NOT OVERDRIVE the screw, because dimpling will result and cause the panels to leak. Under-driving can also allow leakage to occur around the screw shaft.
Panels On Roof Purlins
Roof Purlin Spacing should be 18 to 24 inches. If trusses or rafters are spaced up to 24 inches apart, 1x 4 rough cut is sufficient or if spacing is 24 inches to 48 inches apart, use 2x4 SPF or the equivalent. They should be replaced if purlins are not solid or split etc. on a re-roof job.
Roofing Pitch
ABM roofing requires a certain degree of pitch to ensure proper drainage. Roofing should be applied on roofs with a pitch of at least 2 ½ inches per foot. To insure weather tightness, a 3/8 inch wide butyl sealant tape can be used on the overlap. When you need to end lap roof panel sheets, an eight lap is recommended with a roof pitch of three inches to five inches. Any slope five inches or more requires a seven inch end lap. Panels can be ordered up to 48 foot in length to help reduce end lapping.
Panels on Roof Sheet or Shingles
ABM Panels can be installed over existing shingled roofs or roof sheeting of plywood or OSB. Place 1x4 or 2x4 purlins on top of shingles or sheeting - the same as shown in the roof purlin section. Securely screw the purlins to the rafters not the sheeting. If roofing over an existing shingle roof, pull the drip edge from underneath the shingle and / or cut flush to the roof sheeting. After purlins are fastened, install a gutter apron #29 on top of the purlins running along the eaves to cover the wood purlins. After roof sheeting is in place, finish the rake with a residential rake trim # 18. Laying roof panels directly on top of a shingle roof has been done with success, but is not recommended due to screws not being in solid wood.
Condensation
Condensation can a problem for metal roofing over open purlins especially for residential applications. It is recommended to lay a double bubble reflective insulation over the trusses or rafters then install the purlins on top of the double bubble reflective insulation. Tape all joints and staple the reflective insulation to the bottom of the purlins. The insulation will be most effective with at least a 1 inch air space between the insulation and the metal roof sheeting.
If roof purlins are already installed, lay the insulation on top of the purlins. Then fasten the sheeting through the insulation into the purlins. The double bubble insulation will greatly reduce the condensation plus reflect radiant heat (from the sun), thereby keeping your buildings cooler in the summer and warmer in the winter.
Condensation from animal confinement can shorten the life of a metal roof by rusting the metal from the inside out. A double bubble reflective insulation will increase the life of metal roof sheet where animals are confined.
Siding Installation Sequence
Siding panels should be installed starting at the corner or edge of building. Do not run siding sheets all the way to the ground. It is important that all siding panels be kept 6 to 18 inches from contacting the soil to minimize sheet corrosion. A Base Angle #3 is recommended at the bottom edge over the foundation or splash board. If however you use treated lumber or treated skirt board, use a barrier like Post and Peel to cover the treated board before trims or panels are installed. Evergrip 304 stainless steel Bi-Metal screws are recommended to fasten the panels to treated purlins.
The first siding panel must be plumb to assure straight alignment of the entire row of panels. A level should be used to check if panels are plumb. Temporarily fasten the first ABM panel at the starting edge. Install the second panel next to the first with the ABM overlapping. Temporarily fasten panels.
Run a string along purling where fasteners are to be installed. This keeps a strait line to permanently fasten panels.
Side Wall Sheeting
ABM panel can be installed on sidewalls that have up to 3 feet purlin spacing. When you apply panels to solid sheeting, or old weather boards, you may need to use longer screws to reach into solid wood.
Note: Purlins are also referred to as girts or roof lath. ABM panel roofing & siding also referred to as; roof panels, roof sheeting, tin roofing, corrugated roofing plus others.
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