Synthetic thatch is a roofing material that mimics the look of traditional natural thatch but is made from durable, synthetic materials like HDPE (high-density polyethylene) or PVC. It's designed to be lightweight, easy to install, and resistant to rot, insects, and fire. Synthetic thatch offers a longer lifespan (up to 50 years or more) and lower maintenance requirements compared to natural thatch, which needs to be replaced every 5-10 years.