Hey there! If you're looking to spruce up your vinyl siding house, installing exterior molding is a fantastic way to add some style and charm. I'm an exterior molding supplier, and I've seen firsthand how a little bit of molding can transform the look of a home. In this blog post, I'll walk you through the process of installing exterior molding on a vinyl siding house, step by step.
What You'll Need
Before you get started, you'll need to gather a few tools and materials. Here's a list of what you'll need:
- Exterior molding: You can choose from a variety of materials, including PVC, wood, and composite. I recommend PVC molding because it's durable, low-maintenance, and resistant to rot and insects. You can check out our Plastic Side Skirt Trim Moulding, Rear View Mirror Mould, and Roof Molding Mould for some great options.
- Measuring tape: You'll need to measure the length and width of the areas where you'll be installing the molding.
- Miter saw or handsaw: You'll use this to cut the molding to the correct length and angle.
- Caulk gun: You'll use this to apply caulk around the edges of the molding to seal it and prevent water from getting in.
- Screwdriver or drill: You'll use this to attach the molding to the vinyl siding.
- Nails or screws: You'll need these to secure the molding to the siding.
- Safety glasses and gloves: It's always a good idea to wear safety glasses and gloves when working with tools and materials.
Step 1: Measure and Plan
The first step in installing exterior molding on a vinyl siding house is to measure the areas where you'll be installing the molding. Use a measuring tape to measure the length and width of the areas, and make a note of the measurements. You'll also need to decide where you want to install the molding. You can install it around windows, doors, corners, or along the eaves of the roof.
Once you've measured and planned where you want to install the molding, it's time to purchase the materials. Make sure you buy enough molding to cover the areas you measured, plus a little extra for any mistakes or cuts.
Step 2: Cut the Molding
Once you have your materials, it's time to cut the molding to the correct length and angle. Use a miter saw or handsaw to make the cuts. If you're using a miter saw, set the blade to the correct angle for the cut. If you're using a handsaw, use a miter box to guide the saw and make the cut at the correct angle.
When cutting the molding, make sure you cut it a little longer than the measurement you took. You can always trim it down later if it's too long.
Step 3: Install the Molding
Now it's time to install the molding. Start by applying a bead of caulk around the edges of the area where you'll be installing the molding. This will help seal the molding and prevent water from getting in.
Next, place the molding in position and use a screwdriver or drill to attach it to the vinyl siding. If you're using nails, make sure you use galvanized nails to prevent rusting. If you're using screws, make sure you use screws that are designed for use with vinyl siding.
When attaching the molding, make sure you space the nails or screws evenly along the length of the molding. This will help ensure that the molding is secure and doesn't come loose over time.
Step 4: Trim the Molding
Once you've installed the molding, it's time to trim it down to the correct length. Use a miter saw or handsaw to make the cuts. Make sure you cut the molding at the correct angle so that it fits together neatly.
When trimming the molding, make sure you leave a little bit of extra length at the ends. This will allow you to make any adjustments if needed.
Step 5: Seal the Molding
Once you've trimmed the molding, it's time to seal it. Use a caulk gun to apply a bead of caulk around the edges of the molding. This will help seal the molding and prevent water from getting in.
Make sure you smooth the caulk out with a putty knife or your finger to create a neat and professional-looking finish.
Step 6: Clean Up
Once you've installed and sealed the molding, it's time to clean up. Use a damp cloth to wipe away any excess caulk or dirt from the molding and the vinyl siding.
Congratulations! You've successfully installed exterior molding on your vinyl siding house. Your house should now look more stylish and attractive.


Tips and Tricks
- Use a level: When installing the molding, use a level to make sure it's straight. This will help ensure that the molding looks professional and doesn't look crooked.
- Use a caulking gun: Using a caulking gun will help you apply the caulk evenly and neatly. It will also make it easier to control the amount of caulk you use.
- Let the caulk dry: Make sure you let the caulk dry completely before painting or staining the molding. This will help ensure that the caulk adheres properly and doesn't peel or crack.
- Choose the right color: When choosing the color of the molding, make sure you choose a color that complements the color of your vinyl siding. This will help create a cohesive and attractive look for your house.
Conclusion
Installing exterior molding on a vinyl siding house is a great way to add some style and charm to your home. By following these steps and tips, you can install the molding yourself and save money on installation costs.
If you're interested in purchasing exterior molding for your vinyl siding house, please don't hesitate to contact us. We're a leading exterior molding supplier, and we offer a wide variety of high-quality molding products at competitive prices. We'd be happy to help you choose the right molding for your needs and answer any questions you may have.
References
- "How to Install Exterior Molding on Vinyl Siding." This Old House.
- "Vinyl Siding Installation Guide." DIY Network.
- "Exterior Molding Installation Tips." Home Depot.




