Exterior Maintenance/ Gutters & Downspouts/ Outdoor Projects/

How To Install Gutters In Your House


Learn how to install gutters correctly to protect your home from water damage

Learn how to install gutters correctly by measuring the slope of your eaves and adjusting the slope of the gutters accordingly for maximum efficiency.

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level line and actual roof line
Step 1

gutter and downspouts

Using a line level attached to a string, figure out the slope of the eaves. All gutters must slope at least ¼ inch for every ten linear feet to provide proper drainage.

marking the level reference line
Step 2

Measure and Mark for a Level Roof and for Elbows and Turns

For a roof that is level, strike a level reference line, then a second mark ¼ of an inch below the line to indicate the correct slope. If there are portions of the gutter which will have turns or elbows on each end, determine the length for the straight section by holding the elbows in place and marking their ends. Subtract ¼ inch to allow room for the seams that will be installed later.

cutting gutter with tin snips
Step 3

Cut Gutter Sections to Size

Mark the gutter sections using a combination square to carry the line all the way around, then use heavy-duty tin snips to cut the piece to length

snapping a bracket into the gutter
Step 4

Mount the Gutters

Snap brackets into place six inches from each end of the gutter and then every 18 to 24 inches. Mount the gutters by driving a screw through each bracket and into the face-board on the eaves.

cutting a square hole in the gutter
Step 5

Preparing for the Downspout

Holding the gutter in place, mark the location for the downspout hole. Cut a square hole in the bottom of the gutter by first making a punch mark in each corner and then using a jigsaw. File the edges smooth.

crimping end cap edges
Step 6

Install Downspout Connector and End Cap

Apply silicone sealant to the lip of the downspout connector and place it into the cutout. Press into place then secure with short metal screws. Install an end cap into the last gutter section but slipping it onto the end and crimping the edges.

driving screw through bracket in gutter
Step 7

Attach Gutter to Eaves, Cut and Fit Downspout

Attach the gutters to the eaves by driving screws through each bracket and into the face-board of the eaves. Cut and fit the downspout pieces together, making sure that the tapered end is down.

folding aluminum mounting strap around downspout
Step 8

Using Wooden Spacers for the Downspout

If necessary, cut wooden spacers from two by four lumber and attach aluminum mounting straps, using screws and fastening both to the post. Install and screw downspout pieces together. Fold the aluminum mounting straps around the downspout and secure with screws.

applying a strip of aluminum sealer
Step 9

Connecting Gutter Sections

Connect the straight sections of the gutter to each other and the corner angles using a two-inch strip of aluminum called a “seamer”. It over laps the joints and fills in the ¼ inch gap left earlier. The joints are made watertight by applying a heavy bead of sealant on the inside.

holding a piece of leaf guard
Step 10

Testing the Gutters

Let the sealer dry overnight, then take a garden hose and put it in the end away from the downspout and check to make sure the water is flowing toward and into the downspout and that it’s not leaking at the joints. If leaves are a problem, put up leaf guards all the way around.


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