Miami Zoo – Lapolla ThermoSIL Recoat Project

Ornamental Plumage for Miami Zoo Roofs

Too many, Miami is known for beautiful beaches, bright nightlife, and cigar shops, but it’s the climate that offers the most opportunities to some of the city’s more unique residents. For the animals at Zoo Miami, it’s the heat, humidity, and ultraviolet rays that make this city home. The qualities that the African elephant, clouded leopard, and greater one-horned rhinoceros, for example, may find familiar are also the sources of wear and tear on the zoo’s roofs — three roofs to be exact.

Much like Goldilocks’ three bears, each of the three roofs received similar systems but had to be tailored to meet the specific repair needs. Installing the roof coatings over a restaurant required work around many vents and other extrusions as well as timing for when patrons weren’t around eating. The work on the veterinary hospital required a quiet install so as not to disturb animals already out of sorts. And the third roof, over the commissary, offered the fewest challenges: with no obstructions up top, it was a straight forward, “plain Jane” kind of install, according to Kelly O’Brien, project manager for contracting firm A1 Property Services. Could these three “bears” find their fit?

Wet and Wild

After being awarded the small business set aside contract for the zoo’s annual maintenance, A1 came onsite to assess the properties and determine a way ahead. “In the case of last year’s contract, we determined that three buildings were excellent candidates for coating,” O’Brien explained.

Every one of A1’s projects starts with a moisture survey, completed by an independent lab, and these three were no different. “Here, we can only repair 25 percent of the roof,” O’Brien explained. “If more than 25 percent is wet, then it’s not repairable. So a moisture survey is required when it’s going to be a warranty coating job in Miami.” Any evidence of moisture-related intrusions meant repair in those areas. And by far, the roof over the restaurant — with its “many, many penetrations,” according to O’Brien — required the most repair.

“That was going to be a challenging reroof because of the penetrations and equipment,” O’Brien explained. “So in order to stay under their budget and prolong the life of that restaurant roof they opted for coating.” He continued, “The zoo was not in a position to reroof that so coating was the best option there even though the roof was in a degraded condition.”

So the coating solution was optimal, as was the strategy for the A1 crew to work on all three concurrently. They started on the prep of the restaurant, then the hospital, and finally the commissary roofs. As the prep team finished up the final roof, a few other guys started in on any repairs and then began the coating system application. In total, it took one day to pressure wash, three days for repairs, and six days to complete the coatings.

On each built-up roof (BUR), work started with a cleaning using 4,000 psi (27.6 MPa) equipment and Simple Green degreaser. On the veterinary hospital rooftop, this was the only step that the five-person crew had to be particularly careful about.

“One of the other advantages to the client was the coating system was far less intrusive for the animals than a reroof would have been,” O’Brien explained. “That was a plus for the zoo staff because the coating isn’t noisy besides pressure cleaning.” That meant “low impact on the animals that were in rehab in that building.”

Welcome to Miami

With a flagged perimeter, the crew focused on any necessary repairs. Most of the intrusion issues were around penetrations, such as scuppers. Those areas required a little attention: “We removed any wet insulation, replaced it, sealed with like materials, sealed to adjacent membrane, and caulked all penetrations and flashings with silicone,” O’Brien explained.

Once repaired, the crew was able to move into the coatings portion of the job, although not before they prepped the ground. As O’Brien explained, “dealing with overspray was a challenge within the zoo, especially at the hospital where there were a lot of employees’ cars that we had to move.”

Up top, the crew used respiratory and ear protection while applying the coatings: brush applying the primer and spray applying the topcoat. That was a two-party epoxy, used to “stop bleed-through and maintain color” over the asphalt-based substrate, according to O’Brien. Once that had cured, the crew picked up the guns attached to the truck-bound Graco 933 rig — with one guy down below to monitor it.

They applied two coats of Lapolla’s Thermo Sil 3200 HS silicone to achieve approximately 28 mils (711.2 microns) total dry film thickness (DFT). Because the crew was on top of the buildings and the truck with the materials was on the ground, they used their typical 120-foot-long (36.6 m) hoses to breach the distance. “It will pump to seven stories, so it’s a workhorse,” said O’Brien of the equipment.

The crew also had to contend with humidity on this job, which was completed during Miami’s rainy season. In fact, they had to wait until about 10 a.m. each morning to have a dry substrate. “We did humidity readings on a daily basis in order to ensure we met manufacturer’s specifications,” O’Brien said.

Roof Preservation

After two weeks, the total 8,000-square-foot (743.2 m²) project came to an end. And according to O’Brien, it ended successfully. “The zoo was very happy that we were able to restore the restaurant and both of these buildings and stay under their annual budget — so much so that we got the next year’s contract also,” he said.

With a 10-year warranty, the newly coated roofs went the way of the grizzly bear and were finally taken off the endangered list!


A1 Property Services
Coatings contractor
890 SW 69th Ave.
Miami, FL 33144
(305) 547-8355

Graco Inc.
Equipment manufacturer
88 11th Ave. NE
Minneapolis, MN 55413
(612) 623-6000

Coating manufacturer
15402 Vantage Pkwy. E,
Ste. 322
Houston, TX 77032
(281) 219-4100

Simple Green
Material manufacturer
15922 Pacific Coast Hwy.
Huntington Beach, CA 92649
(562) 795-6000

Zoo Miami
Coatings client
1 Zoo Blvd.
12400 SW 152 St.
Miami, FL 33177
(305) 251-0400

Original Article:

Photos courtesy of A1 Property Services

Lapolla Industries Introduces WALL-LOK™ Exterior Elastomeric Wall Coating for Waterproofing

Lapolla Industries Introduces WALL-LOK™ Exterior Elastomeric
Wall Coating for Waterproofing

Exterior Wall Coating Protects Commercial Structures from Water Intrusion and UV Penetration,
Enhances Curb Appeal

Houston, TX (November 30, 2016) – Lapolla Industries, Inc. (OTCQX: LPAD), the global supplier and manufacturer of high performance, energy efficient building products, today announced the launch of WALL-LOK™ exterior elastomeric wall coating for waterproofing. A preventative exterior maintenance product for commercial structures, WALL-LOK™ is a coating solution that acts as both an effective waterproofing and UV protective barrier.

“WALL-LOK™ is a solution aimed at protecting the structural integrity of the building by preventing moisture from getting into the interior of the walls,” said Doug Kramer, President and CEO of Lapolla Industries. “This coating provides exceptional value to commercial facility owners and managers looking to protect their properties from the moisture intrusion, enhance curb appeal and extend the longevity of the exterior structure.”

Optimal for use across brick, concrete, masonry and exterior insulation finishing systems, WALL-LOK™ forms a durable, tough waterproofing film on the surface of the building. The barrier created by the acrylic-based coating and sealer is ten times thicker than standard paint. WALL-LOK™ prevents water penetration, one of the most significant enemies to a building. The coating blocks the formation of harmful mold, algae and mildew by eliminating moisture migration into the vertical and horizontal grout line of walls, protecting valuable inventories from damage. Additionally, it prevents mortar from crumbling due to water penetration, as well as inhibits salt stains and the rusting of steel and iron.

The high-performance product also contains reflective material that shields the structure from harmful ultraviolet rays, which are a common cause of both exterior color fading and degradation and the transfer of heat into the building. The product effectively maintains the outer appearance of the building exterior while reducing interior cooling needs and costs.

WALL-LOK™ is optimal for use on commercial structures including existing apartment communities, industrial warehouse facilities, retail properties and office buildings. The high-fill thick coating and sealer is both flexible and stretchable. These characteristics make it ideal for bridging non-structural cracks and defective joints from hairline cracks up to 1/16 of an inch wide.

WALL-LOK™ is available in a variety of colors including shades of white, tan and gray. Custom colors are also available.

“WALL-LOK™ is an excellent addition to our existing product line,” added Kramer. “The product aligns with our goal of providing best-in-class materials to achieve the highest performance in buildings.”

To learn more about WALL-LOK™ exterior elastomeric wall coating for waterproofing, as well as Lapolla’s entire high performance building product line, visit

About Lapolla Industries, Inc.

Lapolla Industries, Inc. (OTCQX: LPAD) is a global supplier and manufacturer of spray polyurethane foam for insulation and roofing applications, reflective roof coatings and equipment. Based in Houston, Texas, the company’s building envelope and roofing product solutions are designed to reduce energy consumption in the built environment, across the residential, commercial and industrial sectors, in both new construction and retrofits. Visit Lapolla Industries at