Commercial Elastomeric Coatings in Metairie, LA

That the cured film stretches and recovers rather than cracking when the roof moves. For the acrylic type the word has an objective definition: ASTM D6083, the standard specification for liquid applied acrylic elastomeric roof coating, which sets minimum cured film properties including elongation at break and tensile strength. A product either claims compliance with it or it does not.

Minimum properties for the cured film, including an elongation at break of at least 100 percent and a tensile strength of at least 200 psi, along with requirements for permeance, water swelling, adhesion, tear resistance, fungi resistance and low temperature flexibility after accelerated weathering. It is the reason to ask a bidder which standard their product meets rather than accepting the word elastomeric on its own.

Estimated ranges. Acrylic elastomeric runs roughly $1.75 to $4 per square foot installed on a Metairie commercial roof, and the figure moves with the specified dry film thickness and how much preparation the existing surface needs. Those are market estimates rather than a quote; the written specification on your building carries the real number.

It comes down to drainage. Acrylic based elastomeric films soften under water that sits, so on a roof that holds water, silicone is usually the better specification. On a roof that drains properly, acrylic elastomeric is the cheaper system and takes a recoat readily. The drainage survey decides it, and the chemistry comparison in full is on the commercial coating page.

One describes effort, the other specifies a product. Dry film thickness is what the warranty is written against, and on an elastomeric system it is also what determines whether the cured film actually reaches the elongation and tensile properties ASTM D6083 sets, since those are measured on a film of a given thickness. A thin application of a compliant product is not a compliant system.

Because coatings fail at details rather than in the open field. Seams, curbs, drains and parapet junctions are where the roof moves most and where a liquid film is thinnest over an edge. Embedding polyester reinforcing fabric into the coating at those points is a small part of the material cost and most of the difference in service life.

No, and candidacy is settled before the chemistry is even discussed. Whether a roof can take a coating at all is covered on the commercial coating page; what matters here is that no amount of elongation in the cured film compensates for water underneath it. An elastomeric system is specified only once the survey has cleared the assembly.

Manufacturers write warranty terms in years against a specified dry film thickness, the preparation and often an approved applicator, and terms commonly run in tiers. What a system delivers in practice depends on the thickness actually applied, the reinforcement at the details and the condition of the roof underneath, which is why all three are named in the scope.

Yes, and on an acrylic system the reason is worth knowing. ASTM D6083 measures elongation after accelerated weathering as well as when new, because the property that matters is whether the film is still flexible years in. A system that has held its flexibility takes a compatible recoat readily; one that has gone brittle is a different job.

Not by stretching over it. Elongation lets the cured film follow the roof as it moves, which is what stops new cracks forming at the details, but an existing breach is repaired and reinforced during preparation before any field coat goes on. A film bridged over an open defect fails at exactly that line.