All rafters are MSR lumber. Frame is clear, vertical grain Douglas fir.
It’s all about the conditions your yurt lives in- a yurt in the rain forest in Washington faces much different environmental factors than one on a sunny mountainside in the Rockies. Since yurts are covered in fabric, environmental factors play on that fabric in different ways. Snow and wind are not as hard on fabric as sunshine. Here in Colorado, we have over 300 days of high altitude sunshine a year. So, we have seen first hand how our fabrics hold up. We’ve found that vinyl fabrics (ProTech, ProStructure and DuroLast) hold up better in the sunshine than canvas fabrics. One reason is the seams. Our vinyl is seamed with a welder, not thread, (which tends to degrade faster than the fabric around it). In sunny, high UV conditions, a little bit of shade on your yurt makes a big difference.