Hi,
I bought a pair a plastic exterior shutters just to see how they looked and my advice is to save your money.
I believe there is one manufacturer of the stock and various distributors assemble them for you.
The problem with these is the sizing - the rails and stiles are only about 3/4" thick and thus they have a very flat, insubstantial look.
The rotted shutters I took off my house have 1&1/2" thick rails and stiles and I think this is more common.
My shutters did not have real louvers but from what I can tell, fixed louvers are usually about 2” wide, ¼” thick and are set at 45 deg. Thus the louvers will occupy a vertical and horizontal space of 1” which allows the rail and stile to be up to 1/2” proud of the louvers which I think is a good look (rear of louvers could be flush with back of rails, stiles). I assume no vertical overlap on the louvers.
The trick is how to make the recess for the louvers. Rockler has a jig but it's for 1&1/4" louvers and it has mixed reviews.
Ii would be fairly easy to make a router jig to cut a single recess but I'm concerned about accurately positioning the jig to maintain louver spacing.
I suppose I could add a short section of louver to the jig which would fit in the first/adjacent recess thus setting the spacing?
Thanks for any tips