Landau Top Installation Guide

September 28, 2026

A vinyl landau top is one of the few interior-style jobs a careful owner can do at home with hand tools. It is also one of the easiest to get wrong in ways that only show up months later, when an edge lifts at highway speed or a seam wanders off center. This guide covers how to identify the top you need, what sits underneath it, and how to install a new one so it stays put.

Which top do you actually have?

Before ordering, work out how much of the roof your vinyl covers. The four common layouts:

Full top — vinyl runs from the windshield header all the way back to the trunk. Sometimes called a cabriolet roof, because it imitates a convertible.
Half top — vinyl begins at the B pillar, between the front and rear side windows, and continues to the trunk. This is the classic landau layout, and on some Cadillacs it is called a brougham roof.
Three-quarter top — starts partway along the driver's window, ahead of where a half top would begin.
Quarter top — vinyl covers only the rear section, roughly in line with the quarter panels, back to the trunk. Also called a carriage roof.

The details that change the part number

Two cars of the same year and model can take different tops. Check all of these before you order:

Door count. Two-door and four-door tops are cut differently and are not interchangeable.
B pillar. Look for the vertical post between the front and rear side windows. Cars without one are pillarless hardtops; cars with one are pillared sedans. Several models — the Cadillac Fleetwood and AMC Rebel among them — were built both ways in the same year.
Seam placement. Some tops carry a seam down each side of the roof, others a single seam down the center. Some seams are exposed stitching; others are sewn, folded and heat sealed so no thread shows.
Valance. Look at the rear window. If a band of vinyl sits between the glass and the trunk lid, your top has a valance. If the glass runs straight to the trunk, it does not.

If you are unsure after checking those, call us at 1-888-269-6287 before ordering. It takes a minute on the phone and saves a return.

What sits under the vinyl

Most factory landau tops are not vinyl laid straight onto steel. A layer of closed-cell foam — commonly called Insolite — sits between the roof panel and the vinyl, giving the top its slightly padded look and keeping the metal's contours from telegraphing through.

When the old top comes off, check that foam carefully. If it is crumbling, compressed flat, or holding moisture, replace it while the roof is bare. Foam that has been wet is usually the reason rust appears around the moldings, and covering damp foam with a new top traps the problem where you cannot see it.

Rust is not cosmetic here. If you find it during removal, deal with it before the new top goes on. A landau top seals moisture against the roof as effectively as it hides it.

Adhesive: what we recommend

Use a solvent-based, high-grade contact cement made for this kind of work. We recommend Weldwood HHR Solvent Type Spray HG Grade Contact Cement, available in a one-gallon can for use with a spray gun, or in a 14 oz ready-to-spray can for smaller jobs.

This is the same adhesive we recommend for headliner fabric and for vertical carpet installations, so one purchase covers several projects. Water-based adhesives and general-purpose spray glues do not hold up to roof temperatures and highway airflow.

Removing the old top

Save the trim. Remove the moldings and clips slowly and keep them. They are reusable, and replacements are easy to find if one breaks, but you do not want to discover a missing clip at reassembly.
Strip the old vinyl and glue. Scrape the brittle vinyl and adhesive residue away with a scraper or blade tool, working carefully so you do not gouge the paint.
Do not sand to bare metal. Contact cement of this grade bonds perfectly well to sound paint. Sanding the roof down creates a rust risk and gains you nothing.
Mask the edges. Tape along body lines and trim edges before you spray. Overspray on paint is far easier to prevent than to remove.

Laying the new top

Mark your center lines. Find and mark the exact center of the roof and the exact center of the new top, front and rear. Every bit of alignment for the rest of the job depends on these four marks.
Work half at a time. Fold one half of the top back on itself, spray both surfaces, let them flash off, then lay that half down from the center outward. Repeat for the other half. This keeps the material aligned instead of fighting a full sheet of vinyl at once.
Lay adhesive heavy at the edges. Put extra coats along the perimeter, especially behind the windshield channel and across the front header. That front edge takes the airflow at speed, and it is where a poorly glued top starts to lift.
Let it flash 15 to 20 minutes. Both surfaces need to go tacky before they touch. Contact cement bonds on contact — press it too early and you get a weak bond you cannot correct.
Warm the vinyl. A heat gun used gently makes the material pliable over corners and curves. In cool weather this is the difference between a smooth wrap and a wrinkled one. Keep the gun moving; you want warm, not hot.
Sight your seams before committing. Look down the length of the roof from the front, the way you would sight down a barrel, and confirm the seams run dead straight. Once the vinyl is pressed down, it is not coming back up.
Press it down properly. Work the vinyl with firm, even pressure from the center outward, pushing air toward the edges as you go.
Trim, then refit the trim. Cut carefully around clips and retainers, then reinstall the moldings. Take your time here — a trimmed edge that is short by a quarter inch shows for the life of the top.

Before you start

Work in a warm, dry, well-ventilated space. Contact cement fumes are strong and the adhesive behaves badly in the cold.
Give yourself a full day. The gluing steps have waiting built in and cannot be rushed.
Have the new top out of its packaging and laid flat in the warm beforehand, so it relaxes before it goes on the car.

Prefer to have it done for you? A good automotive upholstery shop or body shop will fit a landau top in a day, and can replace the foam underneath at the same time. Find a local installer near you.