Does the Birch Foundation include a warranty? February 18, 2021 18:15 Yes! The Birch Foundation includes a 25 year warranty protecting you against manufacturing and workmanship defects. Please feel free to click here to access the full warranty. Related articles How is the Birch Foundation assembled? What is the weight limit on the Birch Foundation? How does the 100 Night Sleep Trial work? Does the Birch Mattress require a foundation? How much space is between each slat on the Birch Foundation?