Where does the building code put a roof coating?

In the roof recover section. Item 4 of Section 1512.2.1 permits the application of a new protective roof coating over the existing roofs it names, including metal roof panels, built-up, modified bitumen and single ply, without tear off of the existing roof coverings.

Can a coating go over a wet roof?

Section 1512.2.1.1 says a roof recover shall not be permitted where the existing roof or roof covering is water soaked or has deteriorated to the point that it is not adequate as a base for additional roofing. Our reading, not the code's: a coating over a wet roof is the wrong scope either way.

Does a coating have a fire rating requirement?

Section 1509.1 says the installation of a roof coating on a roof covering shall comply with the requirements of Section 1505, the fire classification section, and Section 1509. We check the product's listing for the covering it goes over.

Does a commercial roof coating need a permit in LaPlace?

Nothing the parish publishes says a coating does or does not need a permit. The St. John the Baptist Parish Permit Division on (985) 651-5565 answers that for a specific scope. Where the scope becomes a recover or a replacement, the applicable code sections are reviewed and the permit question goes to the Permit Division.

What does the parish plan say about heat?

The Hazard Mitigation Plan lists extreme heat in its hazard table with the note "Discounted in last HMP Update", and the 2021 update does not profile it. Its planning committee noted extreme heat could be listed, and in the survey committee members emphasized the need to address excessive heat.

Will a reflective coating lower my cooling bills?

We do not quote a saving. The parish plan gives no heat figure, and the effect on a building depends on the roof, the insulation and what runs underneath it. Any reflectance figure comes from the product's own rating.

Can a coating rescue a failing membrane?

No. A coating is a film over a covering that is still doing its job. Wet insulation, open seams or a delaminated covering call for a repair or a replacement scope first, and we say so at the survey.

How is a coating different from a new covering?

A coating is a liquid film applied over the existing roof and measured in mils. A recover installs a new roof covering over the existing one, and a replacement removes all existing layers down to the roof deck. The tear off or recover decision is on our commercial roof replacement page.

Does a coating extend the underlying membrane warranty?

Not automatically. The coating manufacturer warrants the film on its own terms, and whether the covering warranty underneath is affected is confirmed with the covering manufacturer in writing rather than assumed.

Home/Service Areas/Louisiana/LaPlace/Commercial Roof Coating

Commercial Roof Coating in LaPlace, LA

Big Easy Roofing coats commercial roofs across LaPlace and the east bank of St. John the Baptist Parish. A coating goes over a covering that stays in place, so the survey decides whether there is anything sound to coat before the code or the product is discussed.

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Service

City

No tear offIBC Section 1512.2.1, item 4

Not over a wet roofIBC Section 1512.2.1.1

HeatNamed in the parish plan, not profiled

Permit DivisionAnswers the permit question

LaPlace commercial roof coating at a glance

A commercial roof coating is a liquid film over a covering that stays. The building code lists a new protective coating among the conditions under which a roof recover is permitted without tear off, and the parish hazard plan names heat without profiling it. Our reading, not the plan's: the case for a coating is made on the roof.

Where the code puts a coating

IBC Section 1512.2.1

The fourth condition in the roof recover section permits a new protective roof coating over named existing roofs, including metal panels, built-up, modified bitumen and single ply, without tear off of the existing coverings.

Not over a wet roof

IBC Section 1512.2.1.1

A roof recover is not permitted where the existing roof or roof covering "is water soaked or has deteriorated to the point that the existing roof or roof covering is not adequate as a base for additional roofing."

Fire classification applies

IBC Section 1509.1

"The installation of a roof coating on a roof covering shall comply with the requirements of Section 1505 and this section." Section 1505 is the fire classification section.

Heat in the parish plan

Named, not profiled

The parish Hazard Mitigation Plan lists Extreme Heat in its hazard table with the note "Discounted in last HMP Update", and the 2021 update does not profile it.

Which office covers you

St. John the Baptist Parish

The Permit Division on (985) 651-5565 at 1811 W. Airline Highway in LaPlace, through MyGovernmentOnline or in person.

Permit or not

The parish's call

Nothing the parish publishes says a coating does or does not need a permit. The Permit Division answers that for a specific scope, and we ask before the scope is priced.

This page addresses roofing on buildings treated as nonresidential for licensing and code purposes. Mixed use buildings and residential multifamily need their own classification and code review.

The code sections on this page are from the model International Building Code Chapter 15 text we read in September 2026, and the parish does not publish an edition year. The plan quotes are from the parish 2021 Hazard Mitigation Plan Update. Commercial coatings are priced on substrate condition, area and specified thickness rather than a published range, so call Big Easy Roofing for a scoped price.

Four scopes and where the code text puts each

The same roof can be worked at four levels. The table sets each against where the model code text places it and what the coating warranty attaches to, so a scope can be read against the code before it is priced. Whether a permit applies is asked of the Permit Division rather than assumed.

Scope	Where the code text puts it	Coating warranty attaches to	Permit route
Protective coating over a sound existing roof	Item 4 of the roof recover section, Section 1512.2.1: permitted without tear off over the existing roofs it names.	The coating film, on its specified system and dry film.	Asked of the Permit Division for the specific scope.
Localised repair to seams or penetrations, then coat	A repair to the covering plus the coating application.	The coating film. Any effect on the covering warranty is confirmed in writing.	Asked of the Permit Division for the specific scope.
Recover: a new covering over the existing one	Section 1512.2.1, subject to the bars in Section 1512.2.1.1, including the two or more coverings bar set out on our commercial roof replacement page.	Coating manufacturer on the film, covering manufacturer on the new covering.	Ask the Permit Division how this scope is filed.
Replacement: the existing roof removed	Section 1512.2: "Roof replacement shall include the removal of all existing layers of roof assembly materials down to the roof deck."	Coating manufacturer on the film, covering manufacturer on the new covering.	Ask the Permit Division how this scope is filed.

The first two rows describe coating scopes; the last two describe recover and replacement work under Sections 1512.2 and 1512.2.1. Where a coating scope turns into a recover or a replacement, those sections apply and the permit treatment is confirmed with the Permit Division; our commercial roof replacement page covers the tear off or recover choice.

The code line, read as it is written

The model code does not take a coating out of its reroofing section. It lists a new protective coating as the fourth condition for a recover without tear off, then bars a recover over a roof that is water soaked or no longer adequate as a base. Both lines decide a coating scope.

The permit statute

R.S. 37:3737(I)

Act 239 of 2025 required any parish or municipality that issues construction permits to permit and inspect roof construction and reroofing. Act 881 of 2026 recodified the section. Subsection (I)(1) names IBC Chapter 15 for buildings other than one and two family dwellings.

Item 4, in full

IBC Section 1512.2.1

"The application of a new protective roof coating over an existing protective roof coating, metal roof panel, built-up roof, spray polyurethane foam roofing system, metal roof shingles, mineral-surfaced roll roofing, modified bitumen roofing or thermoset and thermoplastic single-ply roofing shall be permitted without tear off of existing roof coverings." It sits in the section headed Roof recover.

The bar that matters most here

IBC Section 1512.2.1.1, item 1

A roof recover shall not be permitted "Where the existing roof or roof covering is water soaked or has deteriorated to the point that the existing roof or roof covering is not adequate as a base for additional roofing."

Who answers the permit question

The Permit Division

Nothing the parish publishes says a coating does or does not need a permit. The Permit Division on (985) 651-5565 answers that for a specific scope, and building code questions are put to the parish before the file goes in.

What the placement means

Our reading, not the code's: because item 4 sits inside the roof recover section, the bars that follow it are the ones we check a coating scope against, whatever the permit answer turns out to be. A coating over a wet or failed covering is the wrong scope either way.

We do not tell you a coating is or is not permit work. That is the parish's answer, and we get it before the scope is priced.

The signs that move a scope off coating

Three findings at survey usually move a scope from a coating to a repair or a replacement: insulation that is wet under any part of the covering, seams or laps open too widely for a film to bridge, and a covering that has delaminated or lost its surface below the level of a repair.

Any of the three calls for a revised scope before any coating is specified, and a wet area runs through the moisture survey on the commercial inspections page.

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Heat, the parish plan and the case for a coating

The St. John the Baptist Parish Hazard Mitigation Plan, updated in 2021, lists extreme heat but does not profile it, and its planning committee asked for heat to be addressed. Our reading, not the plan's: there is no parish heat figure to quote, so a reflective coating is argued on the building itself.

What the plan says about heat

The plan's hazard table lists "Extreme Heat" with an asterisk that reads "Discounted in last HMP Update." Heat is not among the seven hazards the 2021 update selected for its risk assessment: drought, expansive soils, flooding, thunderstorms, tornadoes, tropical cyclones and winter storms.

You can read the plan on the parish Hazard Mitigation Plan Update page.

What the planning committee said

The plan records that "The committee members noted that extreme heat and pandemics could be listed." It also records that "In the survey, committee members also emphasized the need to address excessive heat, levee failure, post-storm evacuation routes, and the need for an elevation program."

The plan does not say heat is not a risk in the parish. It says heat was discounted in the previous update and it does not profile it.

What that means on a roof

Our reading, not the plan's: with no heat frequency, extent or loss figure in the plan, there is no parish number to put behind a reflective coating. We do not borrow one.

Our practice, not a parish rule: the case is made on the building, from what the survey records about the roof surface, the rooftop units and what sits under the roof, and any reflectance claim comes from the product's own rating rather than from us.

Big Easy Roofing Process

A commercial coating is checked against the code text and the survey before it is priced. Four steps, and the first two decide whether there is anything sound to coat.

Roofer surveying seams and ponding on a LaPlace commercial low slope roof before writing a coating scope

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Survey the covering, insulation and seams

The roof is walked and the covering, seams, penetrations and drainage recorded. Insulation is checked where the survey suggests it is worth doing, because a wet roof fails the recover bars.

Put the permit question to the parish

Where the scope raises it, the Permit Division on (985) 651-5565 is asked whether the specific coating scope needs a permit, before any product is ordered.

Written specification and price

The scope names the product, the substrate it goes over, the specified dry film and the preparation, and records the parish answer on the permit question.

Apply to the weather, measure, hand over

Application follows the product datasheet and the forecast, wet film readings are taken as it goes on, and you receive the coating manufacturer warranty and the scope naming what the coating was applied over.

Everything else we do in LaPlace

The rest of the Big Easy Roofing services available in LaPlace, each with its own page and scope of work. Chemistry against substrate is on the commercial elastomeric coatings page, and wet insulation checks are on the commercial inspections page.

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