Gutter Replacement: How to Install Gutters (DIY)

Introduction

Create stronger, better-looking gutters by modifying standard gutter systems. Minimize joints; assemble strong, sleek-looking seams; and add roof flashing to keep water flowing into the gutters where it belongs.

Planning the Rain Gutter Replacement Project

Almost all home centers and full-service hardware stores sell guttering designed for easy installation. But with just a little more work, you can use these same parts to put together rain gutters and downspouts that are stronger and better looking too.

Evaluate and Plan the Gutter Replacement Project

DIY gutter replacement can save you substantially over professionally installed gutters, but there are a few pitfalls to watch out for. Inspect the fascia and soffit (Fig. B, below) for signs of rotted wood, which must be replaced before you put up the rain gutters. Many houses have a trim board or crown molding nailed to the fascia just under the shingles. You’ll need to remove this, as we did, or add a continuous strip of wood under it to create a flat plane for the gutters. In either case, prime and paint bare wood before you hang the gutters.

Also, learn how to install ice-proof rain gutters.

Draw a Sketch and Measure Your House Before Installing Rain Gutters

Fig. A (below) shows an example of a rain gutter system for a typical house. Record the length of the rain gutter runs and mark the downspout locations. Then count up the inside and outside corners and end caps (note whether they are right or left ends). Measure the height of downspouts and add four feet to each for the extension away from the house at the bottom.

Each downspout requires three elbows. There are two types of elbows that turn either to the front or side of the downspout. Most installations require only front elbows, but occasionally you may need a side elbow, usually to turn the downspout extension sideways. Here are a few planning tips:

• Locate downspouts in unobstructed areas where water can be directed away from the house. Avoid locations with obstacles like electric meters, hose bibs or sidewalks.
• Place downspouts in inconspicuous locations if possible.
• Install oversized 3×4-in. downspouts on gutters that drain large roof areas or if you live in an area with torrential rains.
• Slope long gutter runs (40 feet or more) down both directions from the middle and put a downspout on each end.
• Buy special roof hanger mounting straps for houses without fascia boards or for fascias that aren’t vertical.

Gutter Parts and Mounting Details

Measure the horizontal rain gutter runs and downspouts and identify the parts you’ll need.

Family Handyman

Family Handyman