Hunter Polyiso Blog

As the seasons change, it is always good to refresh your understanding of how to properly store Polyiso

storage picBy Tyler Kuhn
Technical Sales Rep
Hunter Panels

Understanding the simple yet important guidelines for proper storage and handling of polyiso insulation for roof and walls is essential for boosting productivity on the jobsite and protecting the building owner’s investment in energy-efficient continuous insulation. Following established best practices can ensure that you get the best results from the performance of the insulation and avoid inconvenient or potentially costly delays due to any modification or replacement of the material that may result from improper storage or handling. 

Your polyiso insulation is ready to use when it arrives, but short-term outdoor storage is often necessary during the construction process. Jobsite conditions should be evaluated in advance of delivery and a storage plan created so that when the material arrives it can be efficiently prepared and staged.  The bundles of polyiso insulation will typically have “feet” underneath so they can be lifted with a forklift and set on dry level ground, such as gravel, pavement, or concrete.  Polyiso bundles should be stored on feet or pallets so that they are off the ground a minimum of 2.0”. Storage on dirt or grassy areas that can become wet and muddy is not advisable. Having a storage plan in place will help avert the frustration and delay that can happen when a plan needs to be created as trucks are waiting to be unloaded, especially if there are challenging jobsite conditions

Storage of polyiso is about more than just shielding it from pouring rain. Bundles of polyiso come wrapped in various types of packaging that are designed to protect the material during transport from the plant to the jobsite or warehouse.  When the bundles are being stored outside the packaging should be slit vertically on the short sides of every bundle before they are placed in their designated location and secured with a waterproof tarp. These steps work in combination to protect the insulation from bulk water and UV while reducing the potential for condensation inside the packaging.

When moving the bundles around on the jobsite they must be protected from damage. Undamaged polyiso can be installed efficiently without the need for time-wasting cuts to remove damaged areas from the boards. It’s lightweight and easy to move around compared to lots of other construction materials, but care should be taken not to damage or crush the edges, which are meant to butt up tightly to each other when installed in order to maximize the insulation’s impact on the thermal performance of the building. It’s also important to avoid punctures or other types of damage to the facer material on both sides of the board because the facers themselves can contribute to various performance characteristics.  Bundles should not be “rolled” around the jobsite or pushed off the edge of a truck.  Edge protection should be used to avoid damage from over-strapping when securing the material to be lifted by a boom or crane.  Individual boards should be carried carefully and set in place.

Creating or renovating a building is an investment of time, energy, and money. Understanding best practices for proper storage and handling of polyiso can contribute to the overall success of the project, including the thermal performance of the insulation and the profitability of the job.  Having a team onsite that understands the importance of proper storage and handling of all construction materials, including polyiso, contributes to overall success of buildings and the people who design, construct, and inhabit them.

When it comes to handling and outdoor storage of Hunter roof and wall polyiso products, remember:

  • Store bundles a minimum 2.0” above dry, level ground such as gravel, pavement, or concrete.
  • Vertically slit the short sides of each bundle.
  • Cover stored bundles with a secure waterproof tarp to protect from UV and bulk water.
  • Handle bundles and boards carefully to prevent damage to foam and facer material.

Image B is correct as it shows the bundles covered with a waterproof tarp.

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