Interior carpentry - casing and plinth blocks
Category: Family and Home > Home
Asked by: bye-ga
List Price: $8.00
27 May 2005 12:04 PDT
Expires: 26 Jun 2005 12:04 PDT
Question ID: 526401
My house has 8 foot ceilings. I plan to install window and door casing that is 3" wide and 1" thick at the point farthest from the edge of the jamb and about 3/16" thick at the casing edge closest to the jamb edge.I plan to install baseboard that is 4 5/8" or 4 3/4" tall and 13/16" thick at its thickest point. I would like to use plinth blocks at the junction of the casing and baseboard and rosette blocks at he junction of the vertical and horizontal casings. How much taller and wider than the casing should the plinth block be? What size should the reveal (of the jamb) be in relation to the plinth or should the plinth be flush with the jamb? Should the casing be centered on the plinth? Regarding the rosette blocks, should the block be the same width as the plinth block? Should the lower insidecorner of the rosette block be aligned with the exact corner of the jamb or set away from the jamb corner? What size should the horizontal reveal be between the casing and the jamb?
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Re: Interior carpentry - casing and plinth blocks
From: bukavu-ga on 17 Jun 2005 09:15 PDT
Plinth blocks are usually sized in proportion to the baseboard and casing. Width can be the same as your casing, however it is more common to make it 1/4" wider. The height of the plinth is more personal preference. It should be tall enough that any decorative top edge begins above the top of the baseboard. It could be 1/4" to 2" above depending on the style you want to achieve. Victorian woodwork has specific style guides yet the 'rules' are difficult to find. The block should be 1/8" to 1/4" thicker than the thickest board so that it stands out from them. (if there is a routered or beveled edge on the blocks account for this in your thickness calculations) The goal is to have your trim butt into the blocks sides achieving a nice finished look. If your Plinths have a bulls-eye or other design it is usually centered width-wise and rises to the top part of the block. To understand this a picture is worth a thousand words. try a google image search. Rosettes and plinths should be the same width. The jamb reveal is a matter of preference but choosing a size 1/4" to 3/8" and keeping it consistant is within the norm. Rosettes and blocks are often flush to the casing on the jamb side which pushes them out wider than the casing and base at the joints and adds to their decorative function. Look for millwork shops can create custom blocks if you can't find the size you need.
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