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Home/Service Areas/Louisiana/LaPlace/Roof Coating

Roof Coating in LaPlace, LA

Big Easy Roofing coats low slope roofs across LaPlace and the east bank of St. John the Baptist Parish. A coating buys years on a roof that is still sound underneath and nothing on one that is not, so the survey comes before the price, and the preparation water stays out of the storm drains.

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$2 to $6 /sq ftEstimated applied
10 to 15 yrsTypical coating life
Substrate firstWhat decides suitability
MS4 permitHeld by the parish for its storm sewer system

LaPlace roof coating at a glance

A roof coating is a liquid applied membrane rolled or sprayed over an existing low slope roof. It buys years on a roof that is still sound, and it does nothing for one that is not, which is why the substrate decides whether it is worth doing at all.

Estimated applied

$2 to $6 per square foot

Driven by the coating system, how many coats, the condition of the substrate and how much preparation and detailing the roof needs before anything is applied. Every figure here is an estimate, not a quote.

Typical coating life

10 to 15 years

On a sound, correctly prepared substrate with the detailing done properly. A coating over a roof that was already failing does not reach the bottom of that range, which is the whole reason the survey comes first.

It is not a leak repair

Fix first, then coat

A coating is not a way of stopping an active leak. Water already in the build up stays in it, and sealing the surface over a wet roof traps it. Any leak is traced and repaired as its own scope before a coating is priced.

It is not for shingles

Low slope roofs

Coatings belong on low slope membranes and metal. Painting a coating onto an asphalt shingle roof is not a recognised way of extending it and can interfere with how the covering sheds water and dries.

The parish holds an MS4 permit

Issued by LDEQ

St. John the Baptist Parish holds a state permit regulating stormwater discharge from its storm sewer system, and says pollutants such as dirt, chemicals and debris can affect the lakes that runoff drains into. As our own practice, preparation water stays out of the drains.

Ponding decides a lot

Water that sits

Areas where water stands rather than drains change which coating systems are appropriate and how long any of them last. Where a roof ponds badly the honest answer is often drainage or replacement rather than a coating.

Every figure on this page is an estimate, not a quote, and is subject to Big Easy Roofing sign off. Cost and timescale depend on size, pitch, access, weather, materials and whatever is found once work starts, so call Big Easy Roofing on (504) 800-8196 and we will come out and give you an estimate for your own roof.

Every figure on this page is an estimate, not a quote, and is subject to Big Easy Roofing sign off. Call Big Easy Roofing on (504) 800-8196 to have a LaPlace roof surveyed before anybody prices a coating.

Which roofs a coating suits, and which ones it does not

A coating is a decision about the roof underneath it rather than about the product. These are the substrates it gets proposed for and what actually happens on each. The last column is the one that decides whether the money is well spent.

What is up there nowCoating suitableWhat has to happen firstHonest verdict
Single ply or built up membrane, sound, drains properlyYes, this is what coatings are forClean down, seams and penetrations detailed, any ponding addressedThe best case, and where the 10 to 15 years comes from
Metal roof, sound, with fixings and laps intactYes, with the right systemFixings checked and laps detailed before any coating goes onWorks well, and the detailing is most of the job
Low slope roof with an active leakNot until the leak is fixedTrace the entry point and repair it as its own scopeCoating a wet roof seals the water in
Roof that ponds water across large areasUsually not the right answerDrainage looked at honestly before anything elseOften drainage or replacement, not a coating
Asphalt shingle roofNoNothing; this is not what coatings are forNot a recognised way to extend a shingle roof

Every figure and timing on this page is an estimate rather than a quote. Three of these five rows end in advice that is cheaper for you and worth less to us, which is the point of publishing them together.

A coating starts with a wash down, and the water has to go somewhere

Every coating job starts by cleaning the roof. St. John the Baptist Parish holds a state permit regulating stormwater discharge from its storm sewer system, and says runoff can eventually drain into Lake Pontchartrain, Lake Maurepas or Lac des Allemands. As our own site practice, cleaning water and product are kept out of the street and the drains.

The parish holds an MS4 permit

Issued by LDEQ

The parish Stormwater Management page says St. John the Baptist Parish holds a permit from the Louisiana Department of Environmental Quality regulating stormwater discharge from its municipal separate storm sewer system, under the Clean Water Act and the Louisiana Environmental Quality Act.

Where the runoff ends up

Three lakes

The same page says stormwater that does not soak into the ground can drain into Lake Pontchartrain, Lake Maurepas or Lac des Allemands, and names dirt, chemicals, debris and litter among the pollutants that can degrade those waters.

The code the parish names

Louisiana Uniform Construction Code

The parish Code Enforcement page says building inspections check that construction complies with the Louisiana Uniform Construction Code and local building codes. It publishes no edition list, and whether that applies to a coating is for the Permit Division, so we quote neither.

Permit or not is the parish's call

Ask the Permit Division

Nothing the parish publishes says a coating does or does not need a permit. The Permit Division answers that on (985) 651-5565, and stormwater questions go to Planning and Zoning at StJohnFloodplain@stjohn-la.gov.

What that changes on a coating job

Cleaning water is collected or directed so it does not run off the roof edge into the street, and primer and coating containers, rinse water and offcuts leave the site with us. Nothing is washed into a gutter at the kerb.

We will not label any particular coating a pollutant or say that a specific rule covers wash water, because we have not read one. The parish names chemicals and debris in runoff as a problem for the lakes, and that is reason enough to keep it out of the drains.

What decides it is still the roof underneath

None of that tells you whether your roof should be coated at all. That answer comes from the survey: the state of the membrane or the metal, the seams and penetrations, and whether water drains or sits.

Where the substrate has gone, a coating is money spent on a roof that needs replacing, so a roof inspection record comes first and a roof replacement is the honest scope if that is what it shows.

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What this climate does to a coated roof

LaPlace sits on the east bank of the Mississippi in St. John the Baptist Parish, hot and humid for most of the year with heavy rain arriving fast. That combination is hard on a low slope roof and it is hard on the coating over it, in two different ways.

Water that arrives faster than it leaves

Heavy rainfall over a short period finds every low spot on a flat roof. Where the falls are shallow or a drain is partly blocked, water stands after the rain has stopped rather than running off.

Standing water is the single biggest predictor of how long a coating lasts here, which is why the survey records where it sits rather than only what the surface looks like.

Sun and heat work on the surface all year

Sustained sun is what a reflective coating is for, and it is also what ages the coating itself. Systems differ in how they handle that, and the honest position is that the roof and its exposure decide the system rather than the other way round.

A coating that is recoated on schedule keeps working. One that is left until it has failed is a strip and start again, which costs considerably more.

Detailing is where coatings fail

Not in the open field, but at the seams, the upstands, the drains and anything that penetrates the roof. Those are the same places a membrane fails, and a coating does not change that.

So the preparation and the detailing are most of the work and most of the value. Keeping the roof on a maintenance schedule afterwards is what protects it, and any defect found on the way is scoped as a roof repair rather than coated over.

Big Easy Roofing Process

Four steps, and the first one can end with us telling you not to coat it. That is a real outcome here rather than a disclaimer.

A roofer surveying the seams and drains on a low slope roof before a coating is priced
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01

01 Survey the substrate and where water sits

The membrane or the metal, the seams, the upstands, the penetrations and the drainage, recorded with photographs so the decision is made on evidence.

02

02 Say plainly whether a coating is the right answer

Sound and draining is a coating. Actively leaking, badly ponding or simply worn out is a repair, a drainage fix or a replacement, and we will say which.

03

03 Write the system, the preparation and the value

Which coating system and how many coats, what preparation and detailing is included, how cleaning water is handled, and the figure, with anything found on the survey named first.

04

04 Prepare, detail, then coat

Clean down with the water kept out of the drains, seams and penetrations detailed, then the coating applied to the specified thickness and the finished roof photographed.

Everything else we do in LaPlace

The other Big Easy Roofing services we run in LaPlace, each with its own crew and written scope. A coating is a life extension on a sound roof, so it sits between maintenance and replacement rather than replacing either one of them.

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LaPlace Roof Coating FAQs

Which roofs a coating actually suits, where the preparation water goes in St. John the Baptist Parish, and when the honest answer is not to coat it.

Topic

Question not here?

Ask us whether your LaPlace roof is worth coating. No charge to ask.

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Will a coating stop my roof leaking

No, and it is not meant to. A coating goes onto a roof that is already watertight, to extend it. Applying one over an active leak seals water into the build up. The leak gets traced and repaired as its own scope first, and only then is a