Just wondering what types if drainage folks are using under the living layer, other than heavy gravel. Looked into pumice gravel but it’s very expensive. Drainage mats aren’t locally available. There’s a product at local big box store like very heavy duty landscape fabric that made me wonder if recycled indoor outdoor carpet might work.
Any ideas or suggestions? This is on a new approximately 20’ diameter octagon. Roof is presently covered with ( temporary) selfstick ice and water guard and tarp. Thanks