There are a couple different types of membrane roofs, so it really depends on which type you have as to whether or not you can walk on it. If you have an EPDM roof, then walking on the roof is generally no problem and won’t damage the roofing material. However, if you have a PVC or TPO membrane roof, then walking on the roof is not recommended as it can cause punctures or other damage to the roofing material. In general, it’s best to avoid walking on any type of membrane roof whenever possible in order to prevent any potential damage.