Hardie Siding Mitered Corners

The method of finishing wood siding or other materials at exterior corners is often influenced by the overall design of the house. Mitered joints require reinforcement, especially when they’re used for something that’s likely to take a little banging around – like a cabinet door. Metal corners (Figure B) are perhaps more commonly used than the mitered corner and give a mitered effect. Many of these are from the years of research done by Jochen Gros and Friedrich Sulzer: Digital Wood Joints Many of their joints are CNC-modified variations on the traditional joints shown above. First, set the height of your tablesaw blade so that it doesn’t cut all the way through your box corners (see photo-right).

Both mortise joints and tension joints are made by carving thin notches into the edge of the wood that many would consider the side that determines its thickness.” The end of another piece is then whittled away on either side of the end, so a thin extension emerges. For the mitered joint, for simplicity the blade tilts for pieces A and B are the same, but you can change them as long as their sum is the same.

If you’re unsure about how a piece of wood is lined up, keep scrap wood handy to test the cut on. Testing is important. The metal corners should fit tightly without openings and be nailed on each side to the sheathing or corner stud beneath. Depending on what independent projects students choose, there will be additional costs for purchasing wood as well. If parts are different in length, joints will not fit well even if the angles are perfect.

Additional program segments include Beginning Furnituremaking, Green Ladderback Chairs, Joinery, Boxmaking, Care & Repair of Shop Machines, Design/Build Process, Intermediate Furniture Techniques, and Wood Finishes. Trim is installed at about 18-22% moisture and immediately begins to dry when the AC goes on. I was locking out a house just this week that had the AC running. Once the field is nailed, re-snap the chalk lines on top of the floor to show where you need to trim the ends.

WmP: Also for reference sake, If your two mitered ends meet and have far off MC(one is 8 the other is 14%) your corners will look like crap because one piece shrank more then the other piece. To solve this problem, start by pinning the inside edge of the trim, making sure the miter joint is pressed tight together. Even with an 18-gauge trim nailer, you can split the molding if you’re not careful.

I remember when the builds here in southeast Michigan would leave the trim in the house a week or more before installation so the wood can adapt, but they never do that any more and because or their hast I see a lot more miters open up.I see more miters open up when the trim was installed during the winter months as apposed to the summer months. Thank you for your help, I had looked everywhere and could not find the answer So I took off the trim and decided to go without the miter this time.

If you want to make use of as much wood as possible, you’ll want to be able to use scraps whenever you can. A mitered corner effect on horizontal siding or the use of corner boards are perhaps the most common methods of treatment. Molding and trim generally look best when they are fitted tightly to walls and ceilings. All you need to make a spline is a jig to hold the box and/or lid at a 45 degree angle.