If you choose to remove the casing completely, you’ll need to replace it with new trim that lines up properly with the plinth blocks. Make your cuts carefully to ensure that the edges of the trim above the plinth block come out even.
You’ll have the most success installing plinth blocks over trim that’s perfectly flat, without any grooves, contouring or other detailing that will make the blocks difficult to fit.
If you accidentally misalign the blocks on the first attempt, pull them off from the corner and try again with a fresh dab of adhesive.
If you don’t pre-drill holes, blunt the end of the nail on concrete or a metal tool so it’s less likely to split the wood. [3] X Research source [v161695_b01]. 6 October 2022. It’s important that the nails be slightly recessed so that you’ll have room to plug them later. Nail into the solid framing behind the trim whenever possible. This will provide greater security and keep the blocks from coming loose. [4] X Research source
Sand the spackling after it dries to make the surface of the blocks smooth and level. [6] X Research source Applying a few strips of painter’s tape to the wall around the door jamb will allow you to work your brush all the way into the edges of the blocks.
Materials like 5/4 trim or MDF paneling are typically recommended for molding projects. It may be necessary to glue two or more pieces of wood together to achieve the desired thickness.
Hold the blocks firmly in place with a vice or table clamp to avoid making any sloppy mistakes. [9] X Research source Routing and other decorative elements don’t offer any enhanced function—they’re simply there to improve the look of the molding.
Smooth out rough spots and imperfections using a sheet of low-grit sandpaper. [10] X Research source When adjusting the height, always make follow up cuts to the bottom of the block so you don’t interfere with the routing or beveling.
In most cases, plinth blocks should be wider and deeper than the casing by at least ⅛” (. 3cm). Don’t worry about marking up the blocks too much—you’ll be painting over them before the project is finished. Make whatever notes will help you install the blocks with precision.
As the old saying goes, “Measure twice, cut once. ” If you want your plinth blocks to fit naturally, it’s essential that you take down your measurements as accurately as possible.
Talk to a store representative or contractor if you have any questions about how to install plinth blocks in your home. One downside of using prefab plinths is you’ll be limited in your style selection. Most commercial blocks will either be of Victorian influence or feature basic routing or beveling. [14] X Research source
Ideally, the style of your plinth blocks should go with the rest of your home’s trim and general decor. [16] X Research source Unless you’re an experienced woodworker, it will probably be a good idea to stick to simple shapes and designs.
