Low maintenance garden terraces

Last week Maxwell and I returned to Bishops Waltham where we extended the patio we built a few years ago to now have sleeper terraces filled with Scottish pebbles running down to a lower terrace area surrounded by more pebbles - the ideal setting for our client's many pot plants.  We installed a second water tap and hose at the lower level.   Before:


A new shed roof typically costs £350 for labour plus materials.  I use good quality felt (£50/10m), stick it down with specialist bitumen-like adhesive, tack along edges and - importantly - edge all sides as shown in the photo with new timbers.  The edging is really important to enable a soft crease in the felt and to protect against the wind getting underneath the felt.  And it looks good!