Aluminum Siding Repair: How to Patch Damaged Siding Aluminum Siding Repair: How to Patch Damaged Siding

What You'll Need
Siding Nails
Safety gloves

Aluminum siding repair may be difficult as the material is easily bent out of shape. In addition, you may find that the repair is further complicated by the fact that moving the interlocking sidings is tricky. With a few spare hours and a period of time when the weather is not damp or windy, you can follow the steps below to properly fix your sidings.

Step 1 - Remove the Damaged Aluminum

Start by cutting out the damaged aluminum from the siding. You will need to use a workman's knife or one with a similarly strong blade to cut solidly through the aluminum. You may have to go around the cut several times in order to penetrate through to the aluminum, as siding is very tough. Once you have finished the cut, pull the damaged piece away from the siding. 

Step 2 - Make a Patch

With your spare aluminum siding, use the cut piece to make a template for a pttch. The patch needs to be slightly bigger than the hole, roughly 3 inches on all sides, so that it can fully cover the gap without the risk of water penetrating into the cut portions. Use some sandpaper to smooth around the hole you have cut in the siding, so that there are no sharp edges. Sand the edges of the aluminum patch in order to give better adherence to the aluminum siding.

Step 3 - Add the Patch

When you have finished sanding, take out the nail flange from the patch, and then slide the siding into position. You should move any pieces that seem to be blocking the new patch out of the way, for example by taking off the nail connections of any surrounding boards. Make sure that you don't remove all of the nail flange for each board, as some are needed to keep the panels secure.

Step 4 - Secure the Patch

Add a good layer of caulk to the patch, and press it into the aluminum piece above it. You should then use a nail to connect the bottom of the aluminum patch to the side of the house, and secure it using some long nails. Secure the flange of the patch to the rest of the siding. Push the J-channel of the patch over the lower nailing strip, so that there is no water able to get into the siding. You should then add further layers of caulk around the edges of the patch, until you are satisfied that there is no opportunity for water to enter under the siding. When  this has been done, you can leave the patch to dry.

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