PVC trim is used similarly to wood trim, but with some key differences in cutting, fastening, and joining. Here's a breakdown of how to use PVC trim effectively:
Cutting PVC Trim
- Tools: You can use standard woodworking tools like circular saws, miter saws, and hand saws to cut PVC trim.
- Blades: Carbide-tipped blades with a high tooth count are recommended for cleaner cuts and to minimize chipping.
- Technique: Cut slowly and steadily to prevent the PVC from melting or binding.
Fastening PVC Trim
- Adhesives: PVC cement is essential for joining PVC trim pieces together. Apply to both surfaces and clamp until set.
- Fasteners: Use stainless steel or other corrosion-resistant nails or screws. Avoid using galvanized fasteners, as they can react with the PVC.
- Pre-drilling: Pre-drilling is often necessary, especially when using screws, to prevent splitting the PVC.
- Spacing: Follow manufacturer recommendations for fastener spacing. Generally, space fasteners closer together than you would with wood, typically every 12-16 inches.
- Expansion/Contraction: PVC expands and contracts with temperature changes, so leave small gaps at joints to accommodate movement, especially with longer runs. Caulk these gaps with a flexible, paintable caulk.
Joining PVC Trim
- Mitered Corners: For clean corners, create overlapping 45-degree miter joints.
- Stud Placement: Ensure at least one piece of the miter joint lands over a stud. Cut the first piece of trim to fall just past the center of the stud, so the overlapping piece can also be securely fastened to the stud center.
- PVC Cement: Apply PVC cement to both surfaces of the miter joint before fastening.
- Clamping: Use clamps to hold the joint together while the adhesive sets.
Additional Tips
- Storage: Store PVC trim flat to prevent warping.
- Painting: PVC trim can be painted with 100% acrylic latex paint or epoxy paints specifically designed for plastics. Clean the surface before painting.
- Caulking: Use a high-quality, paintable caulk to seal gaps and create a weathertight seal.
- Safety: Always wear safety glasses and a dust mask when cutting or working with PVC.
