DO IT YOURSELF
Also, be sure to remember to wear safety glasses when using any power tool, but it is absolutely imperative to wear them when working with this large of a router bit on treated lumber. The amount
of wood that is being removed with each revolution of the router coupled with the fact that the wood is still wet from the factory milling often causes large bits of wood to fly off. Invariably, this debris always seems to get thrown onto the operator. It may be necessary to make more than one finish pass through the router to achieve a smooth final cut. The large router bit has a tendency to make contours in the new cove cut. An additional pass or two through the router will smooth these out and eliminate any waves that were left by the first couples of cuts. If you are milling more than one piece of siding, I highly recom- mend running all of the pieces through the router table before
changing bits to make the rabbet cut on the bottom of the siding. Running all of the pieces through the router consecutively will guar- antee a uniform cut and appear- ance on all of the pieces that are being milled. Professionally milled molding is not as thick as a 3/4-in. stock. In fact, it only measures 5/8 inches in thickness. I could have planed my 1x6 stock down to 5/8 inch from its factory milled 3/4 inches, but I choose to leave it at 3/4 inch so there would be more wood available to resist the rav- ages of the rain and sun. With the vertical cove cut milled, the final step was to cut a rabbet on the bottom, inside edge of each board. This can easily be done with a rabbet kit for a router. Note: If you have a tongue-and- groove bit set and you don't want to purchase a new router bit, you can use the "tongue" bit to make the rabbet cut. To do this, leave
Make a series of consecutive shallow passes across the router to avoid burn marks in the wood.
This photo shows the resulting milled profile, and how the siding interlocks on the house wall.
Set up featherboards to apply pressure against the workpiece so it maintains an even, consis- tent feed across the router bit.