Metal Coping
Metal Coping for Dallas-Fort Worth Parapet Walls
The cap on a parapet wall is the most exposed piece of metal on a flat-roofed building, and in North Texas it takes 100-degree heat, hail and straight-line wind on the same roof. Architectural Metal Panels fabricates metal coping in our Forney shop and installs it on commercial buildings, townhomes and modern homes across Dallas-Fort Worth.
- 26+ years in business
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What is metal coping and why does a parapet wall need it?
Metal coping is the formed cap that covers the top of a parapet wall, the short wall that rises above a flat or low-slope roof. It keeps rain out of the top of the wall, where masonry, wood blocking and the roof membrane all come together, and it finishes the edge the way a fascia finishes a pitched roof.
Without a sound cap, water enters the wall from the top, runs down inside the brick or stud cavity and shows up as a stained ceiling a long way from the actual leak. On DFW strip centers, warehouses, schools and townhomes, the parapet cap often decides whether a 20-year roof lasts 20 years.
Where is coping used around Dallas-Fort Worth?
Retail centers and office buildings with flat roofs, warehouses and metal buildings with parapet fronts, apartment and townhome blocks, and the growing number of flat-roofed modern homes in Dallas and Fort Worth neighborhoods. It also finishes the top of our metal wall panel and ACM installations, where the cap has to line up with the panel joints below it.
Cleated or face-fastened: which coping system fits your building?
Cleated coping is the better system for most commercial parapets and for any wide cap; face-fastened coping is acceptable on narrow residential parapets and tight budgets. The difference is where the screws go.
| System | How it attaches | Movement | Appearance | Best for |
|---|---|---|---|---|
| Cleated (concealed fastener) | A continuous cleat is screwed to the outside face of the wall; the cap hooks over it and is fastened only on the roof side | Cap floats on the cleat and expands freely | No exposed screws on the street face | Commercial parapets, caps wider than about 12 inches, high-wind exposures |
| Face-fastened (exposed fastener) | Screws with neoprene washers through the outer face of the cap into blocking | Screws restrain the metal; holes elongate over years of heat cycling | Visible screw heads | Short runs, narrow residential parapets, budget repairs |
| Snap-on two-piece | Base plate screwed to the wall top; cap snaps over it | Floats | Clean lines, fastest to install | Long straight runs on new construction |
On cleated systems we size the cleat at least as heavy as the cap, because a thin cleat is what lets a cap lift in wind.
Why is coping sloped toward the roof?
So water drains onto the roof, which is built to handle it, instead of down the face of the building. We fabricate the cap with the outside edge higher than the roof edge so it sheds inward, and we set tapered blocking beneath it when the wall top is flat. A dead-flat cap ponds water at every joint, and in a January freeze that water turns to ice in the seam.
How are coping joints made watertight?
With a concealed splice plate under every joint, a gap for movement, and sealant that is never the only line of defense.
- Splice plates: a plate of the same metal sits under each joint, bedded in sealant on both sides, so water that gets past the gap lands on metal and drains to the roof.
- Cover plates: on some systems a short cover plate laps over the joint instead, hiding the gap on the street face. We use them where the architect wants an unbroken line.
- Movement gaps: caps are set roughly 1/4 to 3/8 inch apart so a 10-foot section can grow on a 105-degree afternoon without buckling.
- Standing-seam joints: on copper and on high-end architectural work the caps are joined with a raised, folded seam instead of a flat splice, the same locking seam used on standing seam roofs, with no sealant to maintain.
- Corners and ends: inside and outside corners, end caps and transitions to gutters or gravel stops are shop-fabricated as one piece wherever possible, welded on aluminum and soldered on copper, so the weakest point of the system is not a field-cut miter.
Which coping materials, gauges and colors do we offer?
Painted 24-gauge Galvalume steel is our standard; 22-gauge steel or .050-inch aluminum for wide caps and tall parapets; copper for buildings that want it. Here is how they compare.
| Material | Thickness | Strengths | Watch for |
|---|---|---|---|
| Galvalume steel, Kynar 500 | 24 gauge standard, 22 gauge for wide caps | Stiff, hail-resistant, widest color range, lowest cost | Cut edges need a hem or touch-up; heavy to handle on long runs |
| Aluminum, Kynar 500 | .040 inch standard, .050 for caps over about 16 inches | Never rusts at cut edges, light, corners can be welded | Moves about twice as much as steel in heat; dents more easily |
| Copper | 16 or 20 ounce | Soldered seams, no paint to fail, weathers to a patina | Premium cost; runoff can stain light masonry below |
| Stainless steel | 24 gauge | Highest corrosion resistance for chemical exposures | Rarely needed in inland DFW; expensive |
What colors can metal coping be?
Any standard Kynar 500 (PVDF) color, which typically carries a 30- to 35-year manufacturer chalk and fade warranty, plus custom-matched colors on larger orders. On wall panel projects the coping comes off the same coil as the panels, so there is no near-miss shade on the skyline. In HOA communities and historic districts we provide color chips for the review board, and our lifetime warranty page explains how finish and workmanship coverage work together.
What does ES-1 wind-tested edge metal mean?
ANSI/SPRI ES-1 is the industry test standard for how well roof edge metal, including coping, resists wind uplift, and the International Building Code references it for low-slope roofs. Where the project specification calls for ES-1 tested edge metal, we fabricate and install coping to a tested profile and cleat design and document it in the submittal.
Where no such specification exists, which is most residential and small commercial work, we still follow the same principles: heavier cleats, a continuous cleat on the outside face, closer fastener spacing at corners, and caps that cannot rotate off the wall. Wind does not read the drawings.
Built for North Texas
Why does metal coping fail on North Texas buildings?
Three causes account for most of the coping repairs we are called to: thermal movement that was never allowed for, cleats too thin or too widely spaced, and wind uplift on commercial parapets.
- Thermal movement: DFW averages about 20 days a year at or above 100 degrees and still sees hard freezes, as in January 2024 when the region stayed below freezing for 89 straight hours. A face-screwed cap cannot move, so it buckles, elongates its holes and works the washers loose until every fastener is a drip.
- Under-sized cleats: a 26-gauge cleat under a 24-gauge cap is backwards. Wind lifts the outer edge, the cleat opens, and the cap peels along the run. We see this on strip centers from Mesquite to Arlington.
- Wind uplift: the May 28, 2024 storm brought gusts near 80 mph across the metroplex, and March 2025 straight-line winds reached 105 mph in Haltom City. Parapet caps are the first thing those winds grab, which is why corners get extra fasteners and heavier cleats.
- Sealant-only joints: caps butted together and caulked, with no splice plate, leak the first summer the sealant cracks.
- Hail: thin caps on sun-facing walls take dents that trap water at the joints. 24-gauge steel and .040 aluminum shrug off most DFW hail.
Should coping be replaced during a re-roof?
Usually, yes. A re-roof is the one time the membrane edge, wood blocking and cap are all accessible, and new membrane terminated under old, bent coping inherits every old leak. We coordinate coping with the roofing work so the new membrane runs up and over the wall top before the cap goes on.
On our own commercial metal roofing projects the coping, gravel stops and metal flashing come from the same shop as the panels. Property managers replacing only the coping on an existing roof get a survey of the wall top first, because rotted blocking has to be replaced before any new metal is cleated to it. Everything else the shop makes is on our custom sheet metal page, including the box gutters and scuppers that often share a parapet with the coping.
Metal Coping FAQ
Metal coping questions from DFW building owners
What is the difference between metal coping and a gravel stop?
Coping caps the top of a parapet wall and drains toward the roof. A gravel stop, or drip edge, finishes a roof edge that has no parapet and drains outward into a gutter. Both are fabricated edge metal, and many commercial roofs use coping on the street sides and gravel stop at the rear.
How much does metal coping cost in Dallas-Fort Worth?
Coping is priced per linear foot and depends on cap width, metal and gauge, corners and end conditions, wall height and whether blocking needs replacement. A written quote from our Forney shop lists the cap, cleats, splice plates and installation separately so you can compare it line by line.
What gauge should metal coping be?
For most North Texas parapets, 24-gauge painted steel or .040-inch aluminum, stepping up to 22-gauge steel or .050 aluminum on caps wider than roughly 16 inches or on tall, exposed buildings. The cleat should be at least as heavy as the cap, since a thin cleat is what lets wind lift it.
Can new coping be installed over existing coping?
We do not recommend it. Old caps hide wet or rotted blocking and failed membrane terminations, and a second layer adds weight without fixing the leak. Removing the old metal, replacing bad blocking and installing a new cleated cap costs a little more and solves the problem.
Does metal coping need to be ES-1 tested?
Only where the project specification or the building official requires it, which is common on larger commercial jobs permitted under the International Building Code. Where it is required we supply a tested profile and cleat design with the submittal. Where it is not, we still build to the same wind-resistance principles.
How long does metal coping last in Texas?
A cleated steel or aluminum cap with a Kynar 500 finish and proper splice plates commonly outlasts the roof membrane beneath it, with finish warranties typically in the 30- to 35-year range. Face-screwed caps with caulked joints often need attention within about 10 years in DFW heat.
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Get a parapet cap that drains the right way
Send us the wall length, cap width and a photo, or book a site survey. Written quotes list the cap, cleats, splice plates and installation separately. Call (469) 569-3956 or request your estimate online.