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Home/Service Areas/Louisiana/Hammond/Commercial Elastomeric Coatings

Commercial Elastomeric Coatings in Hammond, LA

Big Easy Roofing applies elastomeric coating systems to commercial roofs across Hammond and Tangipahoa Parish. A coating tends to give way at the seams, the curbs, the drains and the parapet long before it does in the middle of the roof, so those are the lines in the scope worth reading first.

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Reinforced detailsWhere coatings fail
City or parishPermits a reroof
D6083/D6083MAsk which edition
Acrylic onlyWhat the standard covers

Hammond elastomeric coatings at a glance

An elastomeric coating is a liquid applied film that stretches and recovers as the roof moves. The acrylic type is the subject of an ASTM standard. Service life depends on several things, and the one easiest to leave out of a quote is whether the details were reinforced with polyester fabric.

Where coatings tend to fail

The details

Rather than the open field. Seams, curbs, drains, parapet junctions and penetrations are where the roof moves most and where the film sits thinnest over an edge, so those are the places a specification has to name.

Who issues the permit

City or parish, by boundary

A coating sits inside the coating route the reroofing chapter of the building code names, which our Hammond commercial re-roofing page sets out, and whether it triggers a reroof permit under La. R.S. 37:3737(I) is confirmed with the office at file before work is scoped. Where one is required it goes through the City of Hammond Building Department at 219 E Robert Street inside the city limits, or Tangipahoa Parish outside them.

The standard

ASTM D6083/D6083M

The standard specification for liquid applied acrylic roof coating. It is published in revised editions, currently the 2024 edition, so a datasheet that names the standard without naming the edition has told you less than it appears to.

What it does not cover

Anything but acrylic

The standard is written for water dispersed acrylic. IIBEC records that it explicitly excludes styrenated, urethane, silicone, butyl and vinyl acetate polymers, so elastomeric printed on a silicone pail is not a claim against it.

The reinforcement

Polyester fabric

Embedded into the coating at every detail rather than laid over the top. It is a small share of the material cost and a large share of how long the system holds together.

The scheduling constraint

The cure window

A water dispersed coating needs a dry spell to cure to the properties the standard describes, and Louisiana weather narrows that window when storm bands move up from the coast, so the roof is staged in sections around the forecast.

Elastomeric is a description of behaviour rather than a brand: the cured film stretches and recovers instead of cracking when the roof underneath it expands and contracts. That matters because a rigid film on a moving roof splits at the points of greatest movement, and the points of greatest movement are the seams, the curbs and the parapet junctions, which are exactly the places a coating is there to protect.

For the acrylic type there is an ASTM standard behind the word, currently published as D6083/D6083M, which sets minimum properties for the cured film including elongation, tensile strength, adhesion, permeance and low temperature flexibility after weathering. Two things are worth knowing about it. It has been revised more than once, so the edition claimed is part of the claim. And it covers water dispersed acrylic only, so a silicone or urethane product described as elastomeric is not making the same statement. Big Easy Roofing names the product and the edition of the standard it is stated to meet, and where the right answer for a roof is a different chemistry we say so rather than stretching the word to fit.

A map of where the film gives way

A coating usually gives way first at the places the roof moves and the film is thinnest, though ponding, preparation and thickness can fail it in the field too. This is what a specification should require at each detail, and the reinforcement column separates a real scope from a rate per foot.

Where on the roofWhy the film gives way thereFabric reinforcementWhat the scope should say
The open fieldLeast movement and a continuous surface, so the film is doing the easy partNot usually neededThe specified dry film carried across the whole area
Laps and seamsThe two sides move against each other, so the film is worked back and forthRequiredFabric embedded in a base coat along the full run of every seam
Curbs and equipment kerbsRooftop plant transmits vibration and the corners concentrate itRequiredFabric carried up the vertical and back onto the deck, corners cut in
Drains and scuppersWater stands longest here and the film thins over the edgeRequiredA fabric collar, with the drain clamp reinstated rather than coated over
Parapet junctionTwo planes at right angles moving independently of one anotherRequiredFabric at the angle change, carried onto both the deck and the wall
Pipes and penetrationsA round shape pulls the film thin on the radius as it is workedRequiredA fabric collar cut to the shape and terminated at the top

Reinforcement is a small share of the material on a roof and a large share of how long the system lasts, which is why it is a named line in a Big Easy Roofing scope rather than something assumed. Whether your roof is a candidate for a coating at all is settled first, and our Hammond roof coating page covers that. Call (504) 800-8196 for a scope with the details written into it.

What the standard promises and what the permit position is

Two separate questions get run together here. One is what the standard actually promises about the cured film, and the other is whether putting a coating on a commercial roof needs a permit at all. They have different answers and different authorities. Both are settled before a scope is written.

What the standard sets

Minimum cured film properties

D6083/D6083M is a standard specification, so it sets minimum properties for the cured film, including elongation, tensile strength, adhesion, permeance and low temperature flexibility after weathering. It is a floor a product is stated to meet, not a warranty and not a service life.

Ask which edition

Currently 2024

The standard has been revised more than once. A datasheet that says it meets D6083/D6083M without naming an edition has made a smaller claim than it looks like, and the edition is a fair thing to ask for in writing before a product is accepted onto a scope.

It covers acrylic only

Not silicone or urethane

The standard is written for water dispersed acrylic, and IIBEC records that it explicitly excludes styrenated, urethane, silicone, butyl and vinyl acetate polymers. Silicone and urethane coatings have real uses, some of them better than acrylic on a roof that holds water, but they answer to different standards.

The permit question

Confirmed at file

The reroofing section of the building code names a new protective coating over an existing coating, built up, modified bitumen or single ply roof as a route permitted without a tear off. Whether that engages a reroof permit under La. R.S. 37:3737(I) on your building is confirmed with the City of Hammond Building Department on (985) 277-5655 inside the city limits, or with the Tangipahoa Parish Permit Office on (985) 542-2117 outside them, rather than assumed either way.

What a coating quote should name before it names a price

The product and the edition of the standard it is stated to meet, the chemistry, the specified dry film thickness, and every detail that is getting fabric. Those four things are what separate two quotes that look identical on a rate per square foot.

It should also say what surface preparation is included and what happens if the roof is found to be a poor candidate once it is cleaned. A coating over a roof that should not have been coated is a full price purchase of a short roof.

Why the reinforcement is the line that gets cut

Fabric at the details adds labour more than it adds material, and it is invisible under the finished coat, so it is the easiest line to leave out of a quote without anybody noticing until the system starts to open at a seam.

That is why it is written into our scope as a named item at each location rather than implied by the word elastomeric. If you are comparing quotes, the reinforcement column in the table above is the one to read across them.

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Movement and cure on an inland Tangipahoa commercial roof

Three conditions on a Tangipahoa low slope roof decide whether a water dispersed coating reaches the properties the standard describes, and none of them is about the product. How much the roof moves, whether the film gets a dry spell to cure in, and where water stands after it rains.

Heat cycling is what the elastomeric part is for

A dark low slope roof in this climate moves through a wide temperature range every day, and the assembly under the coating expands and contracts with it. A film that cannot stretch and recover tends to split where that movement concentrates.

That is the whole reason the standard measures elongation and low temperature flexibility after weathering rather than only when the product is new. The number that matters is what the film can still do after it has been on a roof for a while.

The cure window is a scheduling problem, not a product one

A water dispersed coating gives up its water to the air, so it needs a dry spell to reach the properties the standard describes. Rain on a film that has not cured can wash it or leave it short of specification, and the roof will not tell you which afterwards. Storm bands moving up from the coast can arrive faster than a marginal cure can finish.

The practical answer is staging: the roof is coated in sections around the forecast rather than in one pass against a fixed date. A programme that ignores that is buying a risk it has not priced.

Where water stands, the coating works hardest

On a low slope roof the film over a ponding area is wet for longer than the film anywhere else, and it is usually also the place the roof drains toward, so it is thin over an edge at the same time.

Acrylic is not the strongest chemistry for standing water, which is a reason the candidacy question comes before the product question. Our Hammond roof coating page covers which roofs are worth coating at all, and it is the honest place to start.

Big Easy Roofing Process

Three steps, and the first one can end with us telling you a coating is the wrong product for the roof.

A roofer inspecting a seam and curb detail on a low slope commercial roof
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01

Establish whether the roof is a candidate

The condition of the existing surface, whether the assembly reads dry, how the roof drains and where water stands. Where the answer is that a coating would be spending money on a roof that needs something else, we say so before quoting one.

02

Specify the product, the edition and every detail

The chemistry, the product, the edition of the standard it is stated to meet, the dry film thickness, and fabric reinforcement named at each seam, curb, drain, parapet junction and penetration rather than assumed.

03

Stage the work around the forecast

The roof coated in sections so each one gets its cure window, details reinforced before the field coat goes on, and the finished system photographed at the details while they are still visible. Call (504) 800-8196.

Everything else we do in Hammond

The rest of the Big Easy Roofing services available in Hammond, each with its own page and written estimate. This page covers the standard and the reinforced details. Whether a roof is a candidate for coating at all is on our Hammond roof coating page, and whether a coating engages a reroof permit is on the commercial re-roofing page.

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