Why SunLastic is an Excellent Solution for Meeting PHTA Standards

Learn how SUNDEK’s decorative waterproofing product protects surfaces.

Posted on January 30, 2025 in Blog

SUNDEK of Washington took a failing, leaking pool deck on the rooftop at BLVD Reston Station and completely transformed it using their SunLastic system, creating a waterproofing membrane that protects surfaces from water damage.

SunLastic is a highly effective waterproofing system for concrete decks that meets the requirements of the Pool and Hot Tub Alliance and ensure the safety and durability of elevated pool installations.

The Pool and Hot Tub Alliance (PHTA) is a leading organization dedicated to developing industry standards and codes for the pool and spa sector. Among their various standards, PHTA-10 addresses the unique challenges of elevated pools, recognizing the need for leak prevention and containment systems. Elevated pools present unique risks when leaks occur, which can lead to significant damage.

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Understanding PHTA-10 Requirements

PHTA-10 provides comprehensive guidelines for the construction and maintenance of elevated pools. It acknowledges that leaks in these pools can have detrimental consequences.

When there's a leak in an in-ground pool, it typically results in water seeping into the surrounding soil. However, elevated pools do not have this safety net. Instead, water from a leak can infiltrate the structure beneath the pool, potentially causing damage to concrete, rebar, and any occupied or functional spaces below. The corrosive effects of salt or chlorinated water on concrete and rebar further exacerbate these risks, leading to costly repairs and safety hazards.

To mitigate these risks, PHTA-10 recommends a secondary containment system. You can think of a secondary containment system like a washing machine pan that's designed to catch leaks. This system acts as a protective barrier, capturing and redirecting leaked water away from vulnerable structural components.

SunLastic: A Reliable Solution for PHTA-10 Compliance

One of the most effective ways to implement a secondary containment system is with a waterproof membrane. SUNDEK’s SunLastic is an exceptional choice for concrete deck surfaces. It offers unparalleled protection for both new construction and retrofit applications. Whether used as the primary deck waterproofing solution or as the secondary containment layer, SunLastic aligns with the PHTA-10 standard to ensure maximum protection for elevated concrete pools and deck surfaces.

SunLastic’s advanced formulation creates a durable, waterproof barrier that prevents water infiltration, protecting the underlying structure from the damaging effects of leaks. Its versatility makes it suitable for a wide range of applications. It can be used during the initial construction phase or as part of a retrofit to existing pools. Using SunLastic gives pool owners and builders peace of mind, knowing their structures are protected against potential water damage and corrosion.

Is SunLastic Decorative?

SunLastic can be used with a variety of SUNDEK’s decorative systems, so clients don’t have to sacrifice appearance for safety—they can have both. SUNDEK has installed stunning surfaces using SunLastic, creating pool decks and surfaces that are both safe and durable while also beautiful.

Why Retrofit Existing Pools?

While most building codes requiring compliance with PHTA-10 standards apply to new construction, retrofitting existing elevated pools is a wise investment. Older pools may lack adequate secondary containment systems, leaving them vulnerable to leaks and other risks. Installing SunLastic as part of a retrofit can safeguard the integrity of the pool and the structure beneath it, ultimately saving money and preventing extensive damage.

Cost vs. Benefits

While incorporating a secondary containment system like SunLastic may cost more upfront, those extra costs are minimal compared to the potential expenses of repairing structural damage caused by leaks. Investing in a reliable waterproofing solution ensures the longevity and safety of elevated pools, protecting both property and peace of mind.

Contractors who do waterproofing near me

At SUNDEK, we’ve been resurfacing concrete for more than 50 years! We have contractors across the country ready to install a splash pad on your property.

Call us at 877-478-6335

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