MDF (medium density fiberboard) has come a long way in the past few years in uses as door, window and crown moldings. MDF trim has the same appearance as traditional wood trim after painting. However, MDF is not stainable and care needs to be taken during installation. The installation process is remarkably similar to traditional wood trim and crown. The do-it-yourself handyman can install MDF trim and crown moldings without too many difficulties.
Instructions
1. Cut MDF moldings the same as traditional wood moldings. MDF moldings can be used everywhere paint-grade molding can be applied. Install moldings in the traditional method for the room.
2. Miter any scarf joints using a compound miter saw. Cut the miters at 45 degrees for each piece. Make the trim 1/4 inch longer for the entire length of the wall section.
3. Apply a coat of wood glue to each end of the MDF joint. Let the glue set for a minute then add additional glue to the end cut. MDF will absorb the first layer of adhesive so a second layer of glue is needed. The glue will help to keep the MDF joints together as the material expands and contracts. The 45-degree cut helps to hide the joint if it separates over time.
4. Sand the joint lightly after the glue has dried. Try not to go through the exterior primer when you sand. Fill nail holes or cracks with a quality wood filler. Sand as needed for the final finish.
Tags: traditional wood, crown moldings, glue will, traditional wood trim, , wood trim