What you'll need
- Chalk line
- Hammer or screwdriver
- Nails, screws or masonry fasteners
- New gutter, downpipe and elbows
- Tape measure
- Metal snips or a hacksaw
- Wall brackets
Run a stringline to mark the slope from the high end to the downpipe. Allow a minimum fall of 1:500 (20mm per 10m). Attach brackets every 750mm. Runs over 10m should slope from a high point in the middle.
Put on an end cap and downpipe outlet and connect to a length of gutter with gutter connector. Apply a small bead of sealant to the inside surface of the connector and the end cap.
Measure length from high point to outlet. Cut gutter, with the outlet attached, using snips or a hacksaw. Mount gutter on brackets; seal inside connecting pieces. Snap clips on top of the brackets.
Attach elbow to downpipe outlet and downpipe. Measure distance between the two elbows. Cut pipe and slide over gutter elbow and inside downpipe elbow. Mount gutter on brackets and seal.
Fasten downpipe to wall with straps or brackets spaced about 2m apart. Cement downpipe into the stormwater drain, run it into a gully trap, or place a splash-block beneath the spout.