cutting molding need help

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cutting molding need help

Postby MarkJohnston » Wed May 11, 2016 11:27 pm

I need a comment on whether or not I should cut a relief in the back side of some molding I'm making.

I'm making some 5" wide molding that is suppose to match some 3" existing molding at least for the first 5".

I attached a end view picture of the 3" existing molding and a picture of the 5" molding sample that I'm going to be cutting. The back side of the 3" existing molding has a 1/16" relief cut that's about 1 1/2" long.
So my question is should I cut a 1/16" relief in the back side of the 5" molding? Is it cut to make the molding less resident to twisting or cupping over time?

Thanks for the help.
Mark
Attachments
smaller molding 2.9 inches wide.PNG
aspire view of 5 inch molding.PNG
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Re: cutting molding need help

Postby MarkJohnston » Wed May 11, 2016 11:29 pm

oops I forgot to post the cut sample.
Attachments
Molding 5.0 wide sample picture 2.jpg
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Re: cutting molding need help

Postby Rcnewcomb » Thu May 12, 2016 1:04 am

What material are you using? Hardwood, MDF, foam, etc.
- Randall Newcomb
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Re: cutting molding need help

Postby MarkJohnston » Thu May 12, 2016 1:46 pm

I'm using Oak to match the other molding. I have to produce 6 pieces 8 foot long.

Mark
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Re: cutting molding need help

Postby rscrawford » Thu May 12, 2016 5:14 pm

The relief in the back is mostly to help the molding fit better (in case of unevenness or protruding nails along the bottom of the drywall, etc).
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Re: cutting molding need help

Postby MarkJohnston » Fri May 13, 2016 9:39 pm

Thanks for the response guys.

I will cut the relief just to be safe.

Mark
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