Winter is tough on wooden pallets. Rain, snow, freezing temperatures, and humidity all affect wood's structural integrity and can shorten pallet lifespan significantly if not managed properly.
Moisture is the primary enemy. Wood is hygroscopic — it absorbs and releases moisture based on its environment. When a pallet absorbs water, it becomes heavier, weaker, and more susceptible to mold and fungal growth. A wet GMA pallet can weigh 55-65 lbs compared to 35-40 lbs when dry.
Freeze-thaw cycles cause the most insidious damage. Water that penetrates wood grain expands when it freezes, creating micro-fractures. As the ice melts and refreezes through multiple cycles, these fractures grow until boards crack or split — sometimes invisibly, creating hidden structural weakness.
Mold growth accelerates in cold, damp conditions. While mold on pallets is generally cosmetic rather than structural, it can be a serious issue for food and pharmaceutical applications. Mold-contaminated pallets will fail food safety audits and must be removed from food supply chains.
Protection strategies: store pallets under cover whenever possible. If outdoor storage is unavoidable, elevate stacks off the ground on concrete blocks or runners to prevent ground moisture absorption. Orient stacks to promote air circulation, and use tarps for long-term outdoor storage.
For cold storage operations, pallet management is even more critical. Pallets moving between cold storage and ambient conditions experience rapid moisture condensation. Allow pallets to acclimate gradually when transitioning between temperature zones.
At Riverside Pallet Co., our heat treatment process reduces initial moisture content to below 20%, giving our pallets a head start against winter conditions. For customers with outdoor storage needs, we recommend our kiln-dried options for maximum weather resistance.