You need to do a little more archeological digging still. You need to know the whole construction of the floor before you can decide how best to install something new. I'd take up that plywood piece in the kitchen and see what's under it. It's higher than the surrounding floor, so needs to go. You should also be able to see from there what subfloor is under the original kitchen hardwood. It's too bad the space under your entryway is finished, but I'd still do some exploring from below to see what's under there, and to figure out the fix to stop it from squeaking. Is it drywall below or a drop ceiling? I know it probably seems like a pain to tear out drywall, but if you cut out a clean patch, like 2' x the width of the joists, it'll be relatively simple to repair. Just make sure to cut it down the center of the joists so that there's room to screw the patch piece to it later. Cut the hole under the area that squeaks the most, if you can. Have someone walk on and watch the floor from below to see what's moving. It might be as simple as pounding in a couple shims from below, or face-nailing a loose board from above. You want to find out what's underneath the hardwood. It might be laid directly on the floor joists, or there might be 10" wide boards that the hardwood is nailed to. Another thought is to take out a board in the hallway, since that's not original and you want to replace it. See what the subfloor is there. I am a bit puzzled at why, when you've stripped the kitchen down to the original hardwood, it's still higher than the hallway floor. Is your current surface perhaps not the original kitchen hardwood? Peeling back the plywood area will help determine that. BTW, I haven't heard of that stop squeaking product you linked to, so can't offer any personal opinion. And don't pour self-leveling compound over top of hardwood. It needs to go over plywood.

My mother is 85 years old and has Parkinson's, so she has trouble getting around. I am keeping her in mind with your question. I would go with a low pile carpet, if you were my parent. It is softer for when she falls down. Mom has hardwood in her foyer, dining, and halls, and although they are beautiful, they are mostly covered with throw rugs, which are a tripping hazard, but less slippery for her. She has trouble with getting a "grip" on the floor when standing up, and carpet helps with that. Wheelchairs will run grooves in a hardwood floor.

I think it depends on the material of the runner. If it's some tweed or something semi-brittle, I would say yes because it's likely to move back and forth and thus scratch... My wife hot glued the shelf liner material (the other side of the 'tacky' side--that 'grabbed' our smooth ceramic tile) to the bottom of one of our rugs and it worked pretty well. It will probably last for a year or so depending on traffic/ how much abuse.

Yeah one finished room. (Of course still full of dust) They finished our bedroom yesterday. Still have to enventually come back and do the closet, but for now have moved on to the great room. camlan..Their doing the same thing here. Running the wood with no seams from room to room. I hope ours eventually "glow" right now they just glow of dust, but it still is looking nice. judydel. I like to buy rugs at TJ Max HomeGoods. Patty Cakes.. Oh no. The stairs is what inspired us to do this hardwood job. We just finished painting the stairs yesterday. The carpet that was on the stairs was old, dirty and ugly. It had to come up. My kids are teenagers, so hopefully safety wont be an issue. We'll see if they become too loud, etc., we can always eventually add a runner to them. beth..Your floors, rugs and house are beautiful. Thanks for sharing the photos and experience. work.. Thanks for the advice. I'll remember this for the near future. Id love a sweeper I could run on the floor and not have to worry about damage.