Add a splash guard at the bottom of roof valleys to prevent gutter overflows during heavy rain storms. It's only takes 20 minutes.
By the DIY experts of The Family Handyman Magazine:July / August 1999
Drill 1/8-in. holes through both the splash guard and the gutter.
Press the head of a 1/8-in. rivet into each hole.
Place the Pop rivet tool over the shaft of the rivet and squeeze the handle once or twice to compress the rivet and break off the stem.
If rainwater cascading down your roof valley causes a waterfall that washes out the petunias every time it storms, do this simple fix. It costs only a few dollars and takes about 20 minutes to complete. You can find these precut splash guards (about $3) in both brown and white aluminum at a home center, but you could easily make your own out of aluminum or sheet metal and spray paint them to match your gutters. If you don’t own a Pop riveter, attach the guards with 1/2-in. sheet metal screws instead.
Have the necessary tools for this DIY project lined up before you start—you’ll save time and frustration.
Avoid last-minute shopping trips by having all your materials ready ahead of time. Here's a list.