A ledger board fixes to the back wall of the house using the fixings provided. The rafters then connect to the ledger at one end and sit on the top rail at the front at the other. The wall fixing carries the rear load; the front posts carry the front. Most house wall types are suitable — brick, rendered block, timber frame — though the method of fixing varies.

Most installations fall within permitted development rights and do not require planning permission. The rules depend on the size of the structure, its position relative to the boundary and whether the property has had previous extensions. Checking with the local planning authority before ordering is always worth doing.

Yes, both at the point of order. Roof kits in clear, opal or bronze polycarbonate with white or brown glazing bars. Screening in heavy-duty rebated redwood as one side, two sides or combinations. The back of the structure is already enclosed by the house wall.

Not necessarily, though matching the threshold height is the most common approach. The decking base is designed to sit at the level that works for the site — the height of the front posts accommodates variation.

Two people with a drill, a level and spanners can build most sizes in a day. The ledger fixes first, then the front posts and decking frame, then the decking boards, then the rafters.