Interior Installation Guide
Updated March 30, 2026
Interior Installation Guide
Follow these steps for a smooth, clean installation and a uniform finished appearance.
Recommended Tools & Materials
- Cutting tool: Miter saw with fine-tooth blades
- Recommended adhesives / compounds: Sheetrock 90 or Durabond 90
- Damp sponge or cloth
- Fine grit sanding paper or sanding sponge
- Finish coat materials
Installation Steps
- Install the pieces so they are smooth, seamless, plumb, true, flush, and finished with square, neat corners.
- Apply a 12 mm (1/2") bead of adhesive to the top and bottom back surface of the molding.
- While the adhesive is still wet, press the piece firmly into the ceiling corner and clean away any excess adhesive with a damp sponge or cloth.
- For inside, outside, or mitered joints, apply 6 mm (1/4") joint compound to one side of the adjoining piece. Join the pieces with constant pressure to create a tight, void-free joint, then wipe away excess compound.
- Allow the joint compound to dry completely, then sand smooth using fine grit sanding paper or a sanding sponge.
- Once sanded, the finished joint should be smooth and ready for the finish coat.
Finish Coat
- Apply the finish coat according to the finish system manufacturer’s written instructions.
- Apply the finish using the manufacturer’s recommended texture and color.
- Match the approved sample for texture and color, and use the same tools, equipment, and techniques throughout the job to ensure a uniform finish.
Helpful Tips
- Measure carefully before cutting.
- Use fine-tooth blades for cleaner cuts and better fit at joints.
- Clean excess adhesive or compound right away for a neater finish.
- Keep application methods consistent across the full installation for the best final appearance.