Home>Discussions>INTERIORS>Molding & Carpentry>Fill in Gaps on Crown molding corners
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envieddesigns
Fill in Gaps on Crown molding corners

Hi,
I've done a crown molding mdf diy job at home and being a first timer I have some corners that had some nice gaps of an inch or less. I've used Dap Painters putty 53 which I was able to setup and shape nicely to cover up the gaps but I noticed:

1. After two days its not fully dried and
2. it has to be painted first with an oil based paint & I'm using white Benjamin moore water based paint. Any suggestions?

As I mentioned some corners with the big gaps have yet to dry and are soft to the touch, should I remove and pick up a different putty that doesn't need an oil based application prior to paint or should I just get an oil based primer to do the corners then follow up with my Benjamin moore white?

A. Spruce
Re: Fill in Gaps on Crown molding corners
envieddesigns wrote:

I have some corners that had some nice gaps of an inch or less.

My recommendation would be to take the molding down and install a piece with gaps of less than 1/8", anything more than that is never going to stay closed, no matter what kind of filler material you use.

Just because this was a DIY project, doesn't mean you should do shoddy work. Don't intentionally make a mess, then sloppily cover it up to let someone else worry about it. You devalue your home with this sort of thing.

dj1
Re: Fill in Gaps on Crown molding corners

Now you know how difficult compound 3-D cuts can be. Whether it's MDF or solid wood, it hurts to lose expensive materials.

Once I built a custom home and the solid oak crown molding total (material only) was $50,000. Do you think I trusted myself to do the cuts? I'm more a rough carpenter (for rough framing and light finish capenter), but for the crown moldings I hired two expert finish carpenters who had almost no wasted lumber. I paid them with a big grin.

BTW, DIYers have made Home Depot a blue chip company, by buying the same materials 2 or 3 times.

Mastercarpentry
Re: Fill in Gaps on Crown molding corners
dj1 wrote:

BTW, DIYers have made Home Depot a blue chip company, by buying the same materials 2 or 3 times.

After teaching them the wrong way to do the job too. Old crown and molding work is almost always coped at inside corners so that a long piece can be forced in eliminating gaps. And they gave the wood time to acclimate before installing. MDF tends to bow out between fasteners if cut much too long, but on an average wall 1/8" beyond actual measure works well. So now that you understand the "why" you should be able to handle the "how".

I hate MDF moldings of all kinds. It is a flaky material that was developed simply as a cheaper alternative to wood and as is usual cheaper means poorer performance. I am OK with it for crown molding since that almost never suffers moisture or impact problems but if you can afford a high-grade wood that's the way to go. And the big-box stores won't have that kind of material selection on anything ever because they specialize in only cheap.

Phil

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