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Panels move.
Fasteners
do not.
Design for both.

Standing-seam and exposed-fastener metal roofing across South Florida. A metal roof outlives almost everything else on the house — but only if the clips let it expand, the underlayment is rated for the heat under it, and every termination is detailed rather than sealed.

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Licensed, bonded & insured · CBC1265280
104 municipalities across 3 counties
Design-build: permitting & construction in-house

Miami-Dade · Broward & Palm Beach Counties

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Illustration of a mechanically folded standing seam over a concealed clip fixed to the roof deck

07 61 00

Division 07 — Metal roofing

A metal roof is
a system that
has to move.

Metal expands and contracts with temperature more than any other roofing material, and a South Florida roof deck swings a long way between a July afternoon and a January night. Every good detail on a metal roof exists to let the panel move while keeping the water out.

Illustration of standing-seam metal panels running up a roof slope with raised seams between the flat pans

Illustration: standing-seam panels running up the slope with concealed clips beneath the ribs. Not a photograph of a completed Elbaz project.

That is why the choice between standing seam and exposed fastener is not really an aesthetic one. A standing-seam panel is held by concealed clips that let it slide; an exposed-fastener panel is screwed through its face, so the movement works against a neoprene washer thousands of times a year. Both are legitimate systems. They simply age differently, and they should be chosen with that in mind.

Underneath, the underlayment matters more here than almost anywhere else: the air gap beneath a metal panel gets extremely hot, and a standard underlayment will not survive it. And every product on the roof needs a current approval and has to be installed to the fastening pattern that approval is conditional on.

systems, and they age in completely different ways

Standing seam hides its fasteners and lets the panel move. Exposed fastener screws through the face and relies on washers. The choice sets the maintenance for the life of the roof.

underlayment specification that is not optional here

The cavity under a metal panel runs far hotter than under tile or shingle. A high-temperature underlayment is what stops the layer that actually keeps water out from degrading.

sealant-only details that survive long term

Sealant is a secondary defence. Every termination, penetration and transition should shed water by geometry first.

Illustration of a roof deck covered with self-adhered high-temperature underlayment before the metal panels are set

07 61 13

Division 07 — assembly

What a metal roof is made of

Six layers, from the deck upward. Only the top one is visible, and it is the one least likely to fail.

Deck & substrate

Everything is fastened to this.

Plywood or OSB sheathing, sound, dry, properly nailed to the framing and flat enough that a long panel does not telegraph every ripple. Re-roofing is the moment to replace any soft sheathing — it will never be as cheap to reach again.

Suitability. Every metal roof. Panels can only be as flat as what is under them.

Maintenance. None once covered, which is why it is inspected before covering.

MaterialPlywood or OSB sheathing

RequirementSound, dry, flat, correctly nailed

InspectedBefore underlayment

Failure modeSoft deck that will not hold a clip fastener

High-temperature underlayment

The layer that actually keeps water out.

Metal sheds water; the underlayment stops what gets past it. Under a metal panel the cavity runs very hot, so the underlayment must be rated for that temperature or it will soften and fail long before the metal does. It carries its own product approval.

TypeHigh-temperature self-adhered

WhyThe cavity under metal runs hot

ApprovalIts own, separate from the panel

Panels & profile

The visible layer and the structural one.

Panel gauge, rib height and seam type set both the look and the performance. A taller rib sheds better on a low slope; a heavier gauge resists oil-canning and hail. Panels are usually roll-formed to length so there are no end laps on the slope.

Set byGauge, rib height, seam type

FormedTo length, avoiding end laps

WatchOil-canning on light gauges

Clips & fasteners

Where the whole system either works or does not.

Standing-seam panels are held by concealed clips fixed to the deck; the clip lets the panel slide as it expands. Exposed-fastener panels are screwed through the face into the deck with a sealing washer. The spacing of either is set by the product approval, not by preference.

Standing seamConcealed clips, panel slides

Exposed fastenerScrew through face, sealed washer

SpacingPer approval, tighter at edges

Illustration of metal roof-to-wall flashing with a counter-flashing let into the stucco above the panel upstand

Flashings & terminations

Where roofs actually leak.

Eave, rake, valley, ridge, hip, headwall, sidewall and every penetration. Almost every metal roof failure is at a termination rather than in the field, and the good ones shed water by geometry with sealant only as a secondary defence.

Where leaks startTerminations, not the field

PrincipleShed by shape first

SealantSecondary, never primary

Illustration of a vented ridge cap on a standing-seam metal roof with panels closing into it from both slopes

Ventilation & closures

What keeps the assembly dry from underneath.

A vented ridge lets the roof cavity breathe, and profiled closures fill the gaps under the panel ribs at eave and ridge so wind-driven rain and wildlife stay out while air still moves.

RidgeVented cap with closures

EaveProfiled closure under the ribs

PurposeAirflow without water entry

07 61 00

Detail study — illustrated, not photographed

Eight details that decide a metal roof

The images in this section are illustrations produced for this page, not photographs of completed Elbaz projects — we do not have a documented standing-seam project to show, and we would rather say so than show you somebody else's roof. Every detail below is real, and is what we build to.

Illustration of a completed standing-seam metal roof on a South Florida house, with palms and neighbouring roofs beyond — Illustration of a completed standing-seam roof on a South Florida house. Produced for this page; not a photograph of an Elbaz project.

The seam, mechanically closed

Illustration. Two panel edges folded together over a concealed clip. The clip is fixed to the deck and the panel is free to slide through it as it expands — which is the entire principle of a standing-seam roof.

07 61 16

Systems analysis

Standing seam and exposed fastener, honestly

Both are proper roofing systems and both are widely used in South Florida. They differ in how they handle movement, and that difference shows up years later rather than on the day of installation.

Movement

The difference that matters most

A standing-seam panel is held by a clip that lets it slide as it heats and cools. An exposed-fastener panel is pinned through its face, so every expansion cycle works the screw hole slightly. Over a long South Florida service life that is the single biggest behavioural difference between the two systems.

Fasteners

Concealed or exposed, and what that means

Standing seam has no penetrations through the field of the panel at all, so there is nothing in the water path to age. Exposed fastener relies on a neoprene washer under each screw head; those washers are a genuine maintenance item and are the usual reason an exposed-fastener roof needs attention before the metal does.

Cost and use

Where each one belongs

Exposed fastener costs less installed and is entirely appropriate on outbuildings, porches, workshops and agricultural structures. Standing seam costs more and is the system we normally specify on a primary residence, where the roof is visible and where nobody wants to be re-torquing screws.

Appearance

Two quite different roofs

Standing seam reads as clean parallel lines with no visible fixings, which suits contemporary architecture. Exposed fastener has a more agricultural, ribbed character and visible screw lines. Neither is wrong; they simply belong on different buildings.

If the building is your house and you intend to stay in it, standing seam is usually the better long-term engineering decision. If it is a detached structure and budget is the binding constraint, an exposed-fastener roof installed properly is a perfectly honest answer.

Illustration of the eave of a standing-seam metal roof showing the drip edge and the closure beneath the panel ribs — Illustration: eave termination with drip edge and closure.

07 61 00

Division 07 — panel systems

The metal roofing explorer

Seven decisions that set how a metal roof looks, performs and ages. All of it is in the page whether you open a panel or not.

07 61 13

Standing seam

Concealed clips, mechanically or snap seamed

The premium residential system: no fasteners through the water plane and panels free to move.

AppearanceClean parallel ribs, no visible fixings; suits contemporary and traditional roofs equally.

DurabilityThe longest-lived common system, because nothing in the field penetrates the panel.

MaintenanceKeep valleys and gutters clear and inspect terminations after major storms. No fastener maintenance.

SuitabilityPrimary residences, visible roofs, low to steep slopes depending on rib height and seam type.

Cost influenceHigher installed cost than exposed fastener; the panels, the clips and the labour are all more.

South FloridaHandles thermal movement well and, correctly detailed, performs strongly under high wind uplift.

Common useWhole-house roofs and prominent architectural roofs.

ApprovalSystem approval covering deck, underlayment, clip spacing and panel, with tighter spacing at perimeters and corners.

07 62 00

Detail study — terminations

Four terminations, and what each one is for

Metal roofs almost never fail in the middle. They fail where the roof stops. These are illustrations, not photographs of completed Elbaz projects.

Illustration of two roofers setting a long standing-seam metal panel onto a roof deck

Final roofing inspection, clean-down, magnet sweep of the grounds, and handover of approvals and warranties.

Quality check

Closeout file with approvals, warranties and the permit record.

Prevents

A warranty claim years later with no documentation to support it.

01 31 00

Division 01 — approvals

Permits, approvals and wind

Roofing is permitted work everywhere in the tri-county area, and the product approval regime is stricter here than almost anywhere in the country.

What always applies

A roofing permit is required for a re-roof or a new roof covering.
The panel system, the underlayment and the accessories each need a current product approval.
Fastening patterns come from the approval and tighten at perimeters and corners.
Inspections happen in sequence — deck, dry-in and final — before concealment.
The contractor of record is responsible for the work matching the approved set.

What varies

Miami-Dade and Broward sit inside the High-Velocity Hurricane Zone; Palm Beach does not, which changes which approvals are acceptable.
Design wind pressures come from the parcel: its exposure, the building height and its risk category.
Some municipalities and associations restrict roof colour or profile.
Fee schedules and inspection scheduling are local.
Historic districts may restrict metal roofing or its appearance.

Uplift is a corner problem

Wind uplift on a roof is far higher at the corners and along the perimeter than in the middle. That is why the fastening pattern tightens at the edges, and it is part of the approval rather than an installer preference.

Product approval matching

Inside the HVHZ the usual evidence is a Miami-Dade Notice of Acceptance; elsewhere a Florida Product Approval. It must be current, cover the configuration used, and be installed to its own fastening schedule.

Deck condition

A re-roof is the only realistic opportunity to inspect and repair the deck. Soft sheathing found and replaced now is inexpensive; found later it means removing a new roof.

Dry-in discipline

The roof must be watertight at the end of every working day. In a South Florida summer that is a scheduling constraint, not an aspiration.

Ventilation strategy

Vented or unvented is decided at design. Retrofitting ventilation into a finished metal roof is disproportionately expensive.

Insurance and wind mitigation

A documented roof covering, deck attachment and secondary water barrier can affect wind-mitigation credits. Keep the paperwork — it has real value.

Solar and future penetrations

If solar is likely later, plan the attachment now. Standing seam accepts clamp-on mounts with no penetration at all, which is a genuine long-term advantage.

Colour and reflectivity

Lighter, more reflective finishes reduce heat gain measurably in this climate. Darker colours run hotter and fade sooner.

We do not promise timelines here. Panel lead times, roll-forming, permit review and weather all vary. We give a written programme for your specific roof, including the dry-in strategy, before work starts.

01 25 00

Division 01 — substitutions

Three roofing decisions worth understanding

Each is a real trade-off. Nothing below is presented as the obvious answer.

Compared onStanding seamExposed fastener

Fasteners

Concealed clips; nothing penetrates the field of the panel.

Screws through the panel face with a sealing washer.

Movement

The clip lets the panel slide as it expands.

The panel is pinned, so thermal cycling works the fastener hole.

Maintenance

Terminations and gutters only.

Periodic fastener inspection, re-torquing and washer replacement.

Appearance

Clean parallel seams, no visible fixings.

Ribbed and utilitarian with visible screw lines.

Expected service

The longer-lived of the two systems.

Panel life is good; washer life is the limiting factor.

Cost influence

Higher installed cost.

Meaningfully lower — its main advantage.

Best use

Primary residences and visible roofs.

Outbuildings, workshops, carports, agricultural structures.

Limitation

Cost, and it demands a competent installer.

The recurring fastener obligation is real and often not explained.

07 61 00

Technical record — drawn, not photographed

The assembly, layer by layer

A metal roof is six layers and one principle: let the panel move, and shed water by shape rather than by sealant.

Drawn diagram, produced for this page. It is a generic illustration of a typical standing-seam assembly and of the approval chain behind it — not a detail for any specific project, and not a photograph of completed work.

Roof structure

Rafters or trusses. Nothing above works if the plane is not true.