First time poster looking for some thoughts. I'm replacing a small porch on the front of the house and when I pulled the trim panel under the front door I found that some water got in and there is some insect and water damage. I pulled some siding and the damaged board is the 2x10 that runs along the edge and the floor joists appear to be nailed into it (I'm not sure what you'd call that part). There's rotten wood at the bottom of the edges of the door (so the sub-floor) and obviously the exterior wood panels in that area are bad. The insect damage (carpenter ants I believe) seems to be limited to a 3 foot section where the untreated 2x10 got wet, about half-way to 2/3 deep into the 2x10. The joist ends and sill appear to be undamaged. It looks like the 2x10 ends just past the edge of an undamaged exterior panel on one side. I was thinking that the best course of action would be to cut out the damaged section of 2x10, pull it off the ends of the joists and then replace it with a pressure treated 2x10. Is this the recommended repair for this sort of thing? And assuming it is, do I need to anything to bolster the seam from the new wood to the existing (I was thinking a block of the leftover 2x10 behind the seam screwed into both parts with decking screws. Also, what is the best way to cut it - a circular saw? I have to get the door out and the tile off the floor before I have a good sense of what the extent of the damage is to the sub-floor, but once I get there I'm sure I'll have more questions. Thanks in advance! -PH

I want to replace the small 24" door currently installed between an upstairs bedroom and an upstairs attic with a 30" x 80" door. Eventually I will convert the attic to a finished closet, but now I just want to install a 30" interior door in the 2x6 wall where the 24" door is now. Do I need to be concerned about cutting a larger hole for the new door in this wall because there is plywood in the wall? Is it a shear wall? Can I cut out the bottom plate out of the wall for the doorway? (red X in the picture linked below). [url]https://imgur.com/a/joMEffd[/url] I drew in the new framing for the 30" door rough in with yellow in the linked picture.