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Old 06-04-2012, 06:20 PM   #1
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Custom window, bend or cut the curved pieces?


I am working on replacing rotten pieces of my custom framed front window. It is turning out to basically be a piece by piece rebuild and I am particularly stuck on the curved pieces.

I initially tried using an accuscribe to scribe the curve of the window on to a piece of 1x4 then cut it out with a jigsaw. This does work but looks bad, the cut is not consistent all the way through and I have to patch 2 ft pieces together at a time since I can't really accurately scribe anything larger.

I can probably trace out the glass that I remove onto a piece of 1x4 and cut that but again I'll be stitching many pieces together.

I was thinking about building a wood steaming jig and steaming the cut pieces to the point where I can bend them into shape and finish nail them in place. I am basically just ripping a 1x4 down to 1.5" pieces that are used to sandwich the window in place so I would only need to steam fairly small, but long pieces.

I have never steamed wood before so I'm not sure how well it will bend or if nailing it in place when it is still hot will even be an option. I am using treated pine.

picture attached.

Thanks!!
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Custom window, bend or cut the curved pieces?-303628_506128126264_324300020_38379_1587902409_n.jpg  

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Old 06-04-2012, 06:26 PM   #2
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Custom window, bend or cut the curved pieces?


There is no way to steam and bend wood in that direction.
Concider buying a sheet of 3/4, 4 X 8' PVC. it can be spliced with bisket joints and PVC glue.
It can be sanded, cut and painted just like wood but will not rot.

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Old 06-04-2012, 07:27 PM   #3
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Custom window, bend or cut the curved pieces?


I am not familiar with working with PVC. Would I be able to heat and bend it to shape so I can avoid cutting the proper and smooth curve? Would I be able to rip it to the correct width and finish nail it in place just like the wood I am using?

In addition to having trouble tracing the correct curve I also have trouble cutting it smoothly with the jigsaw. Would I be better off cutting the curve smoothly with a scroll saw?
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Old 06-04-2012, 07:29 PM   #4
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Custom window, bend or cut the curved pieces?


If Azeks pvc trim will work--that can be heated with a heating blanket and bent very easily--

Do you have a good shot of the piece you need to duplicate?
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Old 06-04-2012, 07:34 PM   #5
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Custom window, bend or cut the curved pieces?


I dont really have a good shot of the pieces that need to be duplicated as the window is so rotten it is basically just falling apart as I remove it. But I basically just need to produce a piece of 1.5" trim that can be butted up against the window on either side to hold the glass in place along the far left curved edge against the brick. I can easily finish nail the wood or other material into the plywood pieces that are attached to the brick.
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Old 06-04-2012, 07:34 PM   #6
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Custom window, bend or cut the curved pieces?


I'm messing up, are you just trying to form the inside of that arch?
I was thinking you were trying to form around the face.

What threw me off was your trying to use a Jig saw.

Last edited by joecaption; 06-04-2012 at 07:42 PM.
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Old 06-04-2012, 07:37 PM   #7
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Custom window, bend or cut the curved pieces?


It looks like a simple lancet arch. You can make it with a router and a trammel jig.
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Old 06-04-2012, 07:52 PM   #8
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Custom window, bend or cut the curved pieces?


Quote:
Originally Posted by joecaption View Post
I'm messing up, are you just trying to form the inside of that arch?
I was thinking you were trying to form around the face.

What threw me off was your trying to use a Jig saw.
I'm trying to form the piece that butts up against the brick and the glass.

I've attached another picture with a red line showing where I'm trying to build a piece. As you can see I've started on the bottom but I'm not too happy with the way its turning out.

I'm hoping you'll tell me you misunderstood my question and I can steam bend the wood in that corner?
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Old 06-04-2012, 07:54 PM   #9
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Custom window, bend or cut the curved pieces?


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Originally Posted by Keith Mathewson View Post
It looks like a simple lancet arch. You can make it with a router and a trammel jig.
It is not quite a lancet arch, it does not have the pointed top. I believe it is closer to a parabolic arch.
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Old 06-04-2012, 08:01 PM   #10
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Custom window, bend or cut the curved pieces?


I'd like to see a pic of the whole window. In order to do the brickwork the false-work would have to have been built first, so someone would have to have laid it out before construction. You can determine what that layout is.

You can steam bend the part you had highlighted in the pic however I would be inclined to do a bent lamination. If you choose to do a steam bend remember to over bend to account for the springback.
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Old 06-04-2012, 08:08 PM   #11
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Custom window, bend or cut the curved pieces?


Here is a picture from further away so you can see the entire arch.
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Old 06-04-2012, 08:17 PM   #12
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Custom window, bend or cut the curved pieces?


A band saw sure would help you on that project---
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Old 06-04-2012, 08:20 PM   #13
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Custom window, bend or cut the curved pieces?


It appears to be a lancet arch with a slightly modified top. The spring line looks as if it breaks on the inside edge of the inner style/mullion. Find the center of the arch from baseline to break in springline to see if it is true, as I suspect it is. From there you can make the piece you need. Hard to tell from the pic if the top of the arch is a one, two or three point curve.
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Old 06-04-2012, 09:39 PM   #14
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Custom window, bend or cut the curved pieces?


I think I would try to make a close fit template from a wider board, and hold it against the window, then use a pair of dividers, (compass) set to 1/2 the width of the jig saw table and scribe the arc. Cut the board with the jig saw, maybe sand it to take off rough spots, then fasten it on top of the pieces you want to use and run the jig saw against the template. That should help guide the cut to avoid most of the variations of a free hand cut. It should be close enough to sand it to fit from there
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Old 06-05-2012, 05:31 AM   #15
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Custom window, bend or cut the curved pieces?


Vinyl Trim = very flexible (more-so than unheated PVC).

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