I have an old Cape Cod and I want to replace the entry door. The sill appears to be just a 2x6 that's painted. The "threshold" for the old door looks just like weather stripping that's nailed to the 2x6 sill. My question is: if I install a prehung door that has metal threshold already attached, do I just put it on top of the 2x6 sill? Or do I remove the sill and replace it with something else? I'm thinking put it right on top, but the metal threshold would not extend to cover the entire 2x6 sill...so there would be a step up to the threshold. Am I making sense? Any help is most appreciated.

For years and years I fought with the cheap one size fits all screen door on our 80x36 glass slider. The thing would not stay in adjustment, the screws would strip out, I had to put one of those metal mesh dog panels on the bottom of the door just to get some sort of torsional rigidity in the frame, the "rollers" such that they did not roll worth a darn etc etc etc. The thing got knock out of the tracks again today and I have had it. I'm tired of patching the thing together. So what do I do? Go to lowes and buy another one for $50 and another dog guard for $30 but this one said, "heavy duty" on it. I'm sure it would be better built than my old one... wrong, same piece of junk build. One size fits none - 75-81" in height. The screws in the bottom roller panel came pre-stripped out because the holes were drilled too close to the edge of the paper thin aluminum. which meant the door could not be adjusted up enough to come anywhere close to fitting the 80" door frame. I lost it at that point and threw the damn door across the backyard where it will stay until Monday when I return it to get my money back. Whew, thanks for listening to my rant. Now... Somebody must manufacture sliding screen doors to fit these standard sized door frames that at least have some robustness to them? Anybody? Seems there would be a non-custom standard model of higher quality than these adjustomatics from the box stores? Do builders really put these pieces of junk in the $400-600K spec houses I see all around our area? There must be a higher quality alternative without having to go the custom build route?? Thanks Wayne