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+-- Thread: Exterior Trim (/showthread.php?tid=7378812)
Exterior Trim - Cub_Cadet_GT - 07-08-2025
I have to replace some small pieces of exterior trim around some of the glass in my sunroom that has rotten out from weather/rain exposure. It's a weird thickness ~.56" and I cannot find any pressure treated stock in that thickness.
I downsized several years ago and got rid of my thickness planer and don't want to drop several hundred just for this project. I was able to find some white pine shiplap that was the right thickness and I can mill all the rest of the edge details with my router table.
My question is other than good caulk and exterior paint what could I use to help protect it since it is not treated? Should I coat in epoxy before installation?
RE: Exterior Trim - joe1086 - 07-08-2025
Can you find a way to use PVC/Azec instead?
RE: Exterior Trim - Cub_Cadet_GT - 07-08-2025
(07-08-2025, 05:17 PM)joe1086 Wrote: Can you find a way to use PVC/Azec instead?
I was hoping to but cannot find any stock in the right thickness.
RE: Exterior Trim - museumguy - 07-09-2025
Do you have a tablesaw? What are the finished dimensions, you only tell us the thickness.
RE: Exterior Trim - Cub_Cadet_GT - 07-10-2025
(07-09-2025, 07:24 PM)museumguy Wrote: Do you have a tablesaw? What are the finished dimensions, you only tell us the thickness.
Finished dimensions are .56 x 2.75 x 36. It has a roundover with a sharp lip on one side of the edge, the other edge backs up to the glass. This is acting as glaze would on normal wooden pane windows.
House was built in 1978 and they used this as trim around all the fixed windows in the sunroom. It looks like the builder must have had a shaper and custom made this trim. It was a pretty high end house back in the day and was all custom made.
Yes, I have a Unisaw and router table.
I made the trim piece now with the shiplap I found and it's a perfect match. I milled about 30ft of it so I have plenty of stock for the future. I think I am going to soak it in Thompsons water seal, install it caulk it and paint with good exterior white trim paint. If it lasts half as long as the original I will be happy.
RE: Exterior Trim - MKepke - 07-16-2025
Sounds like I’m late to the party but standard cellular pvc boards can be milled pretty much like lumber. If you only have a TS, you can cut ~ 6” tall/wide by raising the blade all the way up, making a pass(es), flipping the board and making a second pass.
But no reason you can’t follow the same strategy with PT lumber. Other than the usual concern that PT is usually so wet it likes to move a lot after cutting.
If using pvc or pt lumber, I’d keep the factory surface facing the weather, not the milled surface.
If you plan to use wood, recommend painting the areas prone to water infiltration with a copper-based preservative.
-Mark
RE: Exterior Trim - stav - 07-22-2025
You could make one of those router based flattening jigs pretty easy that will allow you to get to the correct thickness.
RE: Exterior Trim - Mike L B - 07-22-2025
A quick google search says Thompsons water seal won't take paint.
I would use a penetrating epoxy like System Three S-1 and then an appropriate paint.
RE: Exterior Trim - Snipe Hunter - 07-24-2025
I've planed and Routed PVC boards. It works fine but make sure you have a dust collector connected. It's real messy. Also, planer rollers tend to slip on it so you might have to give it a little help.