Strengthening the Foundation of Fiberglass Spas and Hot Tubs

In the realm of spa maintenance and repair, ensuring the structural integrity of the spa shell is paramount, especially when it comes to distributing weight uniformly and minimizing stress to prevent cracking. This becomes increasingly important for spas that are out of warranty and require aftermarket adjustments to preserve their functionality and aesthetic appeal.

Implementing Aftermarket Adjustable Supports

For spas requiring additional mechanical support, the integration of aftermarket adjustable supports presents a viable solution. These supports are designed to augment the structural integrity of FRP (Fiberglass Reinforced Plastic) spa shells, ensuring even weight distribution and reducing the likelihood of stress-induced damage.

Key Considerations for Support Installation

The paramount concern when installing new support beams is avoiding any potential damage to the spa shell. The successful approach involves positioning the beam to transfer the load to a robust metal plate placed between the beam and the spa wall. This method safeguards the spa shell from punctures or undue pressure that could compromise its integrity.

Strategic Placement and Material Selection

Identifying areas within the spa that can accommodate support beams, such as seats, steps, or flat regions, is the first step. These areas must be prepped by removing any foam to expose the shell’s structure, enabling a thorough evaluation of the feasibility of beam installation. If the spa design includes pre-installed plates for this purpose, uncovering these plates for confirmation becomes essential.

However, it’s crucial to avoid common pitfalls, such as directly attaching beams without a distributing plate, as this can lead to the spa shell’s deterioration over time. A recommended practice involves using a sizable wooden block as a distributing plate to ensure broad area contact and load distribution.

Securing the Support Structure

Multi-Tech Products offers Polyester resin paste as an ideal adhesive for securing the plate and support beam to the spa shell. This paste facilitates a strong bond while providing ample working time for adjustment before setting. Preparing the application area with proper sanding ensures optimal adhesion, crucial for the longevity of the repair.

For environments prone to moisture, opting for treated lumber or encasing the plate and beam in fiberglass-reinforced resin offers additional protection against rot and degradation, ensuring the support structure remains robust over time.

Securing the Support Structure

After installing the support, assessing the spa’s structural response under load (in an empty state) can indicate the necessity for further adjustments. This proactive approach helps in preemptively addressing potential areas of weakness, thereby extending the spa’s lifespan and maintaining its structural integrity.

Conclusion: A Proactive Approach to Spa Maintenance

Adding support beams to a fiberglass spa or hot tub is a nuanced process that requires careful planning, precise execution, and a deep understanding of the spa’s structural dynamics. By following these guidelines and utilizing high-quality materials, spa owners and repair technicians can effectively enhance the structural integrity of spas, ensuring they remain a source of relaxation and enjoyment for years to come.