The first step is to prep the installation area. This means removing existing siding and caulking, broken boards, light fixtures, spouts, and so on. A special siding tool that will help you remove old siding is called a zip tool. It makes it easier to get under old panels and remove them. Some other helpful tools in clude a utility knife (for cutting around windows and doors) and a pair of tin snips.

Next, you’ll want to install or check that there is a water-resistant barrier and flashing to help keep water out of your walls. If you need to install flashing, make sure that the edges overlap each other. This helps prevent water seeping in. The flashing should go under the nailing fin for the window and over the nailing hem of the siding. The nailing hem is where the nail slots are, above the visible part of the siding.

Then, measure the area to see how much siding you’ll need for the space. Cut the siding to size and get it ready to install. When cutting the siding, it’s helpful to leave a   inch gap at all the ends. Of course, an accurate measurement is important as well to save you time. A good rule of thumb is to measure twice, cut once.

Finally, install the siding with roof nails. Be sure to lock the siding panel into the panel below it and that the nails are centered in the nail slots on the nailing hem. Also, be sure that the nails aren’t driven in too tight. You want the siding to have room to expand, which will help avoid cracking. This is also why the water-resistant material is important since it acts as another layer of defense. You’ll begin with a starter strip - a metal strip that the bottom siding panel hooks into. The lower your siding is installed the better; it will protect the sheathing underneath from water damage and animals.

When you get to the corners of your property, cap the corner posts using tin snips. This will prevent critters and bees from making a home in the nooks and crannies of your home or building. Cut the edges of your siding and fold it into a snug-fitting cap.

Along the top edge of your new siding comes the soffit and fascia. The soffit is where your roof overhang meets your siding and the fascia is the cosmetic board that hides it. It’s a type of transition trim to make the home look more complete. Your gutter usually sits on top of the fascia board. You’ll also apply tr im to all the edges of your home, to help pull the siding together for a clean look.

Be aware that it is more difficult to install a piece of siding around the window and door trims. If you are siding the walls yourself, be prepared for that or ask a professional for help.

If you’re not replacing all of the siding and just repairing sections, keep in mind that you will need to match the new siding to the old. You can take the siding to a retailer or distributor and they can help you identify the brand and color. However, siding can fade with age, so an exact color match may not be pos sible.