Layered insulation is the method of installing layers of insulating material between the cabinet walls and the spa shell. In addition to being friendlier to the environment, layered insulation does not provide a nesting area for insects and rodents. Most importantly, this form of “blanket” insulation, if done properly, can eliminate all of the problems that are associated with repairing full foam spas.

Manufacturers create layered insulation in a variety of ways using a number of materials. Some manufacturers use a thin layer of foam, which does not provide an adequate insulating value, and creates the same problems for repairing spas as seen in full foam insulation. If a layer of foam is used, make sure that it does not cover the spa’s plumbing and fixtures. It is important when considering spas with layered insulation to look for materials with high insulating values. Ideally, look for manufacturers who use multiple layers of insulation.

If the spa is designed with removable walls, it will allow you to easily move the layers of insulation aside when the spa requires any type of service. This makes finding the problem simple and little time is needed to correct the problem. Generally, with most service calls, one service technician can make a repair within one hour, greatly reducing repair costs. Though this may appear to be the ideal method of insulation, beware that most manufacturers try to cut corners. The use of an inexpensive, single layer of insulation and no insulation along the base can result in expensive heating bills.

The ideal method is to have multiple layers of high R-Value insulating material on all four interior cabinet walls, as well as a full layer of insulation along the base of the cabinet. Be sure to check that there is no foam or insulation that covers the plumbing or fittings. This provides the best of all worlds. It does not prohibit the ability to service the spa and is also an excellent method of insulating. Layered insulation that uses the proper materials and installed properly can be considered to be the best method of insulation. In addition, if the material utilized has good soundproofing qualities, it will also help your spa to operate quietly.