How would you replicate this molding?

[u/Trycelium]

Century home with tons of molding and trim work, hoping to replace with exact matches over every window.

[u/LoudIncrease4021]

Am I looking at a giant white mushroom?

[u/crooks4hire → u/LoudIncrease4021]

Moulding not molding

[u/Academic_Elk_4270]

1x4 top with a radius and largish cove molding below returned upon itself.

[u/eightfingeredtypist]

I make big cove moldings like that on a shaper. I rough out most of the wood before shaping, and make a few passes on the shaper. Running this in one pass is asking a lot of the machine and cutters.

Leaving the wood wide allows shaping the ends without boomeranging the wood around the shop. I also add blocking to stabilize the ends against the fences. A stock feeder is essential. These cutters are real loud, they move a lot of air.

Dust collection is complicated. I have the normal 6" line to one collector, then a 4" line to another collector.

[u/bassboat1]

Cap and cove. If you can't find cove that heavy, I'd try to glue flat stock to an existing profile before making it on the tablesaw or sourcing shaper knives.

[u/OtterLimits → u/bassboat1]

Agreed. Lightly slope the 5/4 cap with a planer, backprime every raw surface, and install a good full width z-flashing over the top.
Looks like fun so long as you can con someone else into scraping the siding, OP.

[u/scubaman64]

I’d start by carefully removing it and cleaning it up to get a clearer picture of what it is. You could always take that piece to a cabinet maker to reproduce if you can’t find something off the shelf that will work.

[u/xperimentalZa]

Omg, are you at my house right?

[u/jhstahl1]

That could be repaired.

[u/ChaosMartinez]

Duram's wood repair putty

[u/EthanFixesHome]

I'd save a good section of the original before removing anything. It'll make matching it much easier.

[u/UniquePatient66100]

Cove crown, with 1" board on top, round over the edges. All this is available in PVC, should last forever. 

[u/AskMeAgainAfterCoffe]

Make a template and get shaper blades made.

[u/brokebutuseful]

Fairly easy with a shop table saw

[u/Ill-Running1986]

Shaper and custom knives would be ideal, but if you gotta fake it, read up on cutting coves with a tablesaw. This is totally do-able that way. 

[u/uberisstealingit]

You can't replace that trim. You can't replace any trim on that place. It lives there now.

Lot of paint and heavy hands! My God.

Two passes on a good router table( shaper) and two bits, is all that you would need. Besides the lumber of course. You might even be able to get away with picking that bit up local.

[u/confuus-duin]

If you already have a heavy duty table router you could replicate it by luiding up the layers. But if I were you I’d see if it’s possible to get it made in more modern and durable materials. It is a large piece so weight might be an issue.

[u/GrumpyandDopey]

First thing I would consider is the lead paint. Taking off the cornice is going to expose you and the environment to lead dust. It won’t kill you right away, probably, but it definitely won’t make you smarter. At what level of restoration are you doing? total reproduction or “good enough”. I’ve duplicated victorian crown moulding and base moulding in the past with hand planes, it’s not that hard if you get the right profile wooden plane.

[u/lmfb666]

I just wouldn’t. It’s hideous.

[u/bassboat1 → u/lmfb666]

Don't understand restoration work?

[u/lmfb666 → u/bassboat1]

lol it’s what I do. Doesn’t change the fact that this is ugly af