How To Install PVC Trim

How To Install PVC Trim: Easy 5 Steps

PVC trim has become a popular alternative to traditional wood trim due to its many benefits, including its resistance to moisture and insects, durability, and ease of maintenance.

Here, we’ll provide you with step-by-step instructions on how to install PVC trim, so you can enjoy all of its benefits in your home or business.

Here Are the Steps on How To Install PVC Trim

Here Are the Steps on How To Install PVC Trim

Step 01: Tools and Materials Needed

Before you get started with installing PVC trim, you’ll need to gather a few tools and materials. Here’s what you’ll need:

PVC trim (check with your local supplier for the dimensions you need)

  • Measuring tape
  • Miter saw, or circular saw with a fine-toothed blade
  • Nail gun or hammer and nails
  • Screws
  • Caulk and caulking gun
  • Sandpaper
  • Paint

Step 02: Preparation

Before you begin installing the white reversible PVC, you’ll need to prepare the area where the trim will be installed. Here’s what you need to do:

1. Measure the area where you’ll install the white PVC trim and purchase the appropriate amount of trim.

2. Cut the trim to the desired length with a circular saw or miter saw. Use a fine-toothed blade to prevent chipping.

3. Sand the trim edges to ensure a smooth finish.

4. Paint the trim with the desired color of paint.

Step 03: Installation Steps

Now that you’ve prepared the area and the trim, it’s time to install the PVC trim. Here are the steps you need to follow:

i) Mark the Location Of the Trim Using a Pencil: Use a measuring tape and a pencil to mark the location of the PVC trim on the surface where it will be installed. Make sure to measure twice to ensure accuracy.

ii) Install the Trim: Once you’ve marked where to attach the PVC trim, use the nail gun or hammer to attach it to the surface. Alternatively, screws could be used to attach the trim.

iii) Fill In the Nail or Screw Holes: Use caulk to cover nail or screw holes using a caulk smoothing tool. This will ensure that the holes are sealed and will prevent moisture from getting in.

iv) Apply A Final Coat of Paint: Paint the PVC trim once the caulk is dry. This will help protect the trim from moisture and sunlight.

Step 04: Joining Corners

When installing PVC trim, one of the most important things to consider is how to join corners. Here’s how to do it:

i) Measure the Length of the Corner: Use a measuring tape to measure the corner length where two pieces of PVC trim will be joined.

ii) Cut the Trim to Size: Cut the two pieces of PVC trim to size using a miter saw or circular saw.

iii) Join the Trim Pieces: Hammers and nails can join the two pieces of PVC trim together. Alternatively, you can use screws to join the pieces together.

iv) Fill In the Gaps: Use caulk to fill in gaps between the two trim pieces. This will help seal the corner and prevent moisture from getting in.

Step 05: Finishing Touches

Now that you’ve installed the PVC trim, it’s time to add the finishing touches. Here’s what you need to do:

1. Inspect the Trim For Any Gaps or Imperfections: Inspect the PVC trim for defects. If you find any, fill them in with caulk and smooth out the caulk with a caulk smoothing tool.

2. Sand the Edges: Sand the edges of the PVC molding trim to ensure a smooth finish. This will also help the caulk and paint adhere better.

3. Apply a Final Coat of Paint: After the caulk has dried, paint the PVC trim. Moisture and sunlight will be protected from the trim and give it a clean, finished look.

Maintenance Tips

To keep your PVC board trim at your old house looking its best, it’s essential to perform regular maintenance. Here are some tips to help you maintain your PVC trim:

Clean the Trim Regularly: Use mild detergent and water to clean the PVC trim. Avoid using abrasive cleaners, as they can damage the trim’s surface.

Inspect the Trim for Damage: Regularly inspect the PVC trim for any signs of damage, such as cracks or chips. If you notice any damage, repair it immediately to prevent further damage.

Touch Up the Paint: The paint on the PVC siding trim may fade or chip over time. To keep it looking its best, touch up the paint as needed.

Protect the Trim From Extreme Weather Conditions: PVC trim is resistant to moisture, but it’s still important to protect it from extreme weather conditions, such as prolonged exposure to direct sunlight or extremely cold temperatures.

Data Table:

Here’s a table that shows the pros and cons of PVC trim:

Resistance to moistureMore expensive than wood trim
Resistance to insectsCan warp in extreme heat
DurabilityLimited color options
Easy to maintainIt can’t be stained

How Do I Install PVC Trim Around Windows and Doors?

How Do I Install PVC Trim Around Windows and Doors

Following the manufacturer’s recommended installation instructions for PVC trim around windows and doors is essential. Here are the basic steps for installing PVC trim around a window or door:

1. Make sure the trim is the right length around the window or door. Using a saw, measure and cut the PVC window trim.

2. Apply a bead of PVC cement along trim edges that will contact the surface.

3. The trim should be aligned with the window or door frame before pressing it firmly into place.

4. Attach the trim with nails or a nail gun.

5. Use silicone sealant along the trim edges to prevent gaps and no water infiltration.

When installing PVC trim around windows, it is essential to leave a small gap between the trim and the window frame to allow for expansion and contraction. This gap can be filled with an appropriate sealant. Also, use stainless steel nails or screws to avoid rust and corrosion over time.

How To Install Interior PVC Trim?

To install interior PVC trim, follow these basic steps:

  • Measure and cut the PVC trim pieces to fit the walls or ceilings where you want to install them.
  • Apply a bead of construction adhesive to the back of each trim piece.
  • Press the trim into place and use a level to ensure it is straight and even.
  • Secure the trim with finish nails or adhesive, depending on your preference and the manufacturer’s instructions.
  • Fill any nail holes or gaps with PVC-compatible filler.
  • Sand and finish the trim as desired.

With these steps, you can install interior PVC trim in a professional-looking and long-lasting manner.

How to Install Exterior PVC Trim?

Installing PVC trim on an outside corner can be tricky, but it can be done easily with the right tools and technique. Here are the basic steps to follow:

1. Cut the PVC trim to the appropriate length for the corner. Cut one end at a 45-degree angle, flip the trim over, and cut the other at a 45-degree angle in the opposite direction.

2. Glue PVC cement onto the back of the trim, touching the surface.

3. Align the trim with the corner firmly.

4. Secure the trim to the substrate with a hammer and nails or a nail gun.

5. Apply exterior-grade silicone sealant along the edge of the trim to avoid water infiltration.

When cutting PVC trim to fit an outside corner, it is important to avoid cutting it too short or too long, as this can result in an unsightly gap or overlap. Also, use a level to make sure the trim is properly aligned with the corner.

How Do I Install PVC Trim on A Soffit or Fascia Board?

Follow the manufacturer’s instructions as with any PVC trim installed on a soffit or fascia board. Here are the basic steps:

1. Measure the trim length needed to fit on the soffit or fascia board. Cut the trim to the appropriate length using a saw.

2. Use PVC cement to adhere the trim near the surface.

3. Trim the soffit or fascia board and press it firmly into place.

4. Use a gun or a hammer to attach the trim board.

5. Seal gaps along trim with exterior-grade silicone sealant to prevent water infiltration.

To secure PVC trim on a fascia or soffit, you must use a nail gun or hammer and nails to attach the trim.

Moreover, ensure the trim is straight and aligned with the soffit or fascia board. Finally, wear protective gear, such as safety glasses and gloves, to protect yourself while working with PVC trim.

How To Fill Nail Holes in PVC Trim?

Filling nail holes in PVC exterior trim is a straightforward process that you can do with the following steps:

Clean the Surface: Before filling the nail holes, you should clean the PVC trim surrounding the holes using a clean, damp cloth. This will remove any dust or debris that might interfere with the adhesion of the filler.

Choose the Right Filler: Choose a PVC-compatible filler, such as a two-part epoxy or a PVC trim adhesive. Read the manufacturer’s instructions to ensure that the product is appropriate for the job.

Apply the Filler: Use a putty knife to apply the filler to the nail holes. Be sure to overfill the holes slightly to allow for shrinkage as the filler dries. Smooth the surface of the filler with the putty knife, and wipe away any excess.

Allow the Filler to Dry: Follow the manufacturer’s instructions for drying time. Typically, this will be around 24 hours, depending on the temperature and humidity of your workspace.

Sand the Surface: Once the filler has dried, sand the surface of the cellular PVC trim around the filled nail holes with fine-grit sandpaper to smooth out any bumps or rough edges. Wipe away any dust or debris with a clean, damp cloth.

Paint or Finish the Trim: Once the surface is smooth and clean, you can paint or finish the PVC trim to match the surrounding area.

Following these steps, you can easily fill nail holes in PVC trim and achieve a smooth, professional-looking finish. This approach can also be used for royal molding.

How To Fasten PVC Trim?

To fasten PVC trim, you can use various methods, including:


Apply a construction adhesive designed for PVC trim to the back of the trim and press it into place. This method is fast and efficient but may not be as strong as other options.

Finish Nails

Use a pneumatic or hand-held nail gun to drive finish nails through the PVC trim and into the substrate behind it. It provides a strong hold and can be easily filled with PVC-compatible filler.

Stainless Steel Screws

Use stainless steel screws to fasten the PVC trim to the substrate behind it. This method provides a strong hold and can be easily concealed with PVC-compatible filler.


Use a combination of adhesive, nails, and screws for added strength and security.

Before fastening PVC trim, make sure to read the manufacturer’s instructions and choose the method that is best suited for your particular application.

How Long Does PVC Trim Last?

PVC trim is a highly durable and long-lasting material designed to withstand the elements and resist damage from insects, moisture, and other environmental factors.

When installed and maintained properly, PVC trim can last many years, typically 25 to 50 years or more. The actual lifespan of PVC trim may vary depending on factors such as the quality of the material, the installation method, and the conditions in which it is used.

But, compared to other materials, such as wood siding, which may require frequent maintenance and replacement, PVC moulding trim is an excellent long-term investment for your home or business.

What Screws to Use for PVC Trim?

When fastening PVC trim with screws, choosing the right type of screws is important to ensure a strong and long-lasting hold.

Stainless steel screws are the most commonly used type of screws for PVC trim, as they are highly resistant to corrosion and rust, and they provide a strong hold without damaging the material.

In particular, stainless steel trim screws with a small head and a self-drilling tip are a good choice for PVC trim, as they can be easily concealed and do not require pre-drilling, which can help save time and effort during installation.

Moreover, screws should be chosen based on the thickness of the PVC trim, with longer screws used for thicker trim pieces. Before selecting screws, check the manufacturer’s instructions for recommendations and requirements for your specific application.


Installing PVC trim can be a great way to enhance the appearance and durability of your home or business. With the right tools and materials, and by following the steps outlined in this post, you can easily install PVC trim.

By performing regular maintenance, you can ensure that your PVC trim continues to look its best for years to come.

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