I have an estimate tomorrow for sod. The guy said that he's tried to lay seed but it washes down the hill. I assume I will need sod stakes, just one problem...don't know what the hell they look like. Are they metal or wood? Wouldn't metal ones never actually decompose? I use u shaped metal stakes for drip irrigation I would think they would do, should I try to figure 2 stakes or 1 stake a roll? (Rolls are usually 3x2 i think). Thanks in advance guys.