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Does anybody know how to apply standard 4 5/8″ 52-38°crown moulding on a curved wall? The curved wall radius is 10′ and the moulding is to be applied on the INSIDE of the curve.
Dan
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Replies
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Dan, you might wanna check the archives... We've covered this a couple of times in the last year or so.
Hint: It ain't gonna be easy.
Regretfully, Steve
*Dan, if you look at some of the old Rotunda details, you'll find the ornamental details done in Plaster, not wood. Could be a message in there somewhere.
*
FHB covered this, explaining how it was done around
the exterior of a curved porch, and although I was
reading that issue just this weekend, I can't recall
the number....
The basic technique....you can't bend the existing
molding....fill in the back triangle with solid wood
and make twice as much as you need....then slice it
up on the tablesaw, vertically, offsetting the cuts
in the two halves, so that slices 1 and 3 from the
first length plus slices 2 and 4 from the second add
up to the original molding again (this accounts for
the kerf loss). Now you can put up one layer at a
time, making the bending easier, then fill and smooth
and under the paint it'll look fine.
OR....avoid the wood, recreate the profile in a metal
scraper, and form it in place using plaster.
*
Daniel,
It can be made on the shaper without too much trouble. But I wouldn't try it if you're not used to working a shaper.
Or if it's interior, most lumber yards sell a bendable flex moulding that comes in most "off the rack" profiles. It can probably be used in exterior applications if it's sealed right.
Ed. Williams
*Just a thought... what if he's dealing with stained mouldings rather than painted?
*Beleive it or not,We installed some flex mould for some arched top windows in a mahogany library we built because the builder was too cheap to have radius casing made.The paint contractor was top notch.......you could not tell the diference when he was done. True story.Ed. Williams
*How?? I mean, the flex moulding is plastic, right?Has anyone actually done plaster crown? It has an obvious appeal here.... A client's son worked in one of the larger plaster outfits in England, they still use plaster crown. As he pointed out, in England plaster is plentiful, wood scarce; here, wood is plentiful (for a while longer anyway), so America has tended to use wood.
*anD,No, we use plaster all the time. But it sure cuts down on the carpentry profits.The paint contractor was Shepherd Paint Contractors, Dallas Texas.You want to know how it's done? Call them. Bill Shepherd's a great guy and really know's his stuff. Don't waste his time........he's a friend of mine and very busy like a good man should be.Ed.
*Dan:We put up some crown on a job that sounds identical to the one you described. I don't remember exactly what we used, but I remember that it was very flexible (as in you had it slung over your shoulder as you installed it), weighed a ton, and needed a ton of nails (like every inch) to keep it up. I seem to remeber it neing shipped to us from the manufacturer. The paint contractor then stained it to match. It looked ok when done.Sorry I can't be of more help...Eric
*No, I don't want to waste his time, I want to waste -your- time.I was just curious -- he did a fake stained-wood finish?
*Sure, it looks great when the painter is done, but after the next change of seasons, when there's shrinkage at every seam, how does it look?Remember, we get out of the house before the the expansion and contraction, but those call backs six months later are a bitch.SGH
*anD,Yeah, he did a faux finish that matched the mahogany perfect.Ed.
*This stuff is not wood........everything around it may shrink, but not this stuff.Ed. Williams
*Its got wubba in it and it gets a little 'funny' when nailed. Lots of nails needed as noted. Puckers a bit, like Trex without Viagra. They'll make custom profiles, pre-curved, I think.Jeff
*I got a catalog from people who make the fake stuff. Some is styrofoam. I'll look for the catalog and get you the name.
*
Check out outwater plastics at http://www.outwater.com
They offer flexible and made to order curved moldings
I've ordered from them and found them reliable.
*Dan, the maker of stuff I use is Resin art and its called duraflex if you send them a piece of your profile and the radius they will make it for you. Their web site is http://www.flexmoulding.com check it out
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Does anybody know how to apply standard 4 5/8" 52-38°crown moulding on a curved wall? The curved wall radius is 10' and the moulding is to be applied on the INSIDE of the curve.
Dan