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Wood Moulding Matching Sample (Standard)

Dale Skipper  Member


Good day folks!

Looking for a better material to make our profile samples (Standards) from. We keep a sample of a moulding from it's first run and use that sample to match future runs of same profile. Biggest challenge lies with Crown Mouldings - tough to match to when the standard changes throughout the year due to changes in relative humidity in the shop - as much as a full 1/16". It makes for a challenge on keeping runs consistent.

What do you folks use to match up to? I was wondering about some type of plastic? Something that we could run through the moulder and cut to keep as a match up sample/standard.

Thanks in advance!


11/2/18       #2: Wood Moulding Matching Sample (Stan ...

You could use a product called Starboard. Its high density polyethylene(HDPE). Its used in the marine industry for all kinds of stuff. Pretty soft, machines well. It would make nice molding. Don't try using Azek pvc trim. It doesn't run well and has a porous core.

You could get (32) 3" x 13" pieces. $3.71 a piece???

Look for something similar but less expensive. Nylon, Low density Poly, High density poly.

Check McMaster Carr, MSC

We've never thought about it. Makes sense.

star board

11/2/18       #3: Wood Moulding Matching Sample (Stan ...

This kind of stuff. LDPE is milk jug plastic. HDPE is cutting board plastic.

UHMW is a bearing material.

You might find some cheaper stuff on Ebay or a local plastic dist.


11/2/18       #4: Wood Moulding Matching Sample (Stan ...
rich c.

I thought all that plastic material had a huge coefficient of expansion with temperature?

11/3/18       #5: Wood Moulding Matching Sample (Stan ...

Very interesting reading.

What the article says if you have a piece of nylon 4" wide and it endures a temperature change from 32 F to 104 F it will grow 1/64"

40 C change 0.12mm x 4 =0.48mm=1/64"

I think that would be acceptable.

Plastics temp

11/3/18       #6: Wood Moulding Matching Sample (Stan ...
Dale Skipper  Member


Thanks Adam and Rich C.

I had considered composite decking material in the past...just never tried it yet.

I looked at the Starboard link...looks like maybe 3/4" is the thickest the material comes? I would need the material to be closer to 1" the 4/4 stock we run through as some of our crowns finish at 13/16"; 27/32" and some even 7/8".

I will keep this plastic idea in mind.

Thanks guys!

11/5/18       #7: Wood Moulding Matching Sample (Stan ...


Many people in the window parts industry use check gauges. They are a piece of template material (cast acrylic) that has the moulding cut out of the plastic, when milling they just place the moulding in the gauge, if it fits, it's good to go, if not they make adjustments on the molder until it does. The gauges stay with the templates when stored and not in use.
All the best
Russ @ MR

11/5/18       #8: Wood Moulding Matching Sample (Stan ...
Dale Skipper  Member


Hello Russ!

Thanks for your input. We had discussed this idea here at the shop. If fact, we even tried a 'cookie cutter' type of an idea where we had our tooling supplier cut out the exact shape of a 6-1/2" Crown Moulding out of the middle of a sheet of template plastic. We found this didn't work so well because if the wood came out of the moulder and had even the slightest cup to it - even if lined up right it was difficult to make it fit.

We realized that a better way would be to do a top profile only template for a crown for example and do exactly as you suggested. To make sure that the bevels are always in the correct position I suppose we would also need a second 'gauge template' for the bottom of the crown to make sure the bevels are in the correct position.

Is this what you would recommend as well for a crown? Two separate 'check gauges'?

Thanks in advance, Russ.

Best regards,


11/5/18       #9: Wood Moulding Matching Sample (Stan ...

I used to scribe a start and finish line on my templates, each time I milled a run of moulding I just used the template on top of the moulding, the edges of the moulding lined up to the lines on the template we were good. I also used the cad drawing and placed a sample of the wood on my full scale drawing. These two quality controls always kept us within our tolerances.
I hope that helps
Russ @ MR

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