I've mentioned this before in other threads, but I need some help with installing a replacement exterior door. The house is wood with vinyl siding put on years after the door was installed so I don't know the situation with any flashing or house wrap (although I vaguely recall that when the new siding was put on it was some sort of pink stuff). The previous steel door had been stolen by the tenants (who claimed it was broken) and it was replaced with a very crappy wood door. Because the parquet flooring had been destroyed, the level of the floor was lowered and thus they cut the frame short and lowered the door (so low that it scrapes the substrate/floor when it swings in). It tore the linoleum up and it's now just plywood or something there. There were huge gaps so we filled them with expanding foam (which I think was a mistake bc it may have warped something so the door won't stay shut properly anymore and I have to prop something against it). I know I will need to cut out the top filler part when the new door is put in. We got this prehung door on sale. So it will be about a 36x80 door. It came with narrow trim for the exterior (current exterior trim is crappy 4" wide planks with peeling paint). The jamb depth is 4-9/16". I think fixing the top part and getting the door plumb is not difficult to figure out-- but, I'm trying to figure out what to do about the sill and floor part. The exterior sill is in bad shape and there is some sort of wood between the sill and the threshold that is rotted. I'm trying to figure out the best way to fix it. I want to raise the door back up to allow for higher finished floor should we ever choose to get vinyl plank or thicker flooring material. So, I need advice on what to do about the rotted wood, installation, and moisture prevention. I am leaning toward getting some sort of PVC material so it won't rot since I live in a very humid climate and even treated lumber rots here. I saw a few Suresill sloped PVC door sill "complete packs" and assume I need 4-9/16"D sill pan pack(end caps, sill, and pvc glue & applicator). I will probably still need some flashing tape or something. There is also a head flashing kit but it is 1-3/8"D. Additionally, I have a sliding door with rotted wood (almost identical-- if not worse-- to the rotting on the swinging door). So I am wondering about getting a Suresill specifically for vinyl sliding doors (if we ever get a vinyl sliding door-- I will need to measure the jamb depth, which might be tricky because the track got bent and the door is difficult to open for measuring purposes). The sliding door ones only come in 3-1/4"D but replacement sliding doors are over 4" thick. My questions are: 1. Is it worth getting the Suresill sill pan and having to notch the pre-installed exterior trim that came with the door? (It's around $23 for the pack) 2. Is it worth getting the header pack? 3. How do I deal with/replace the rotted pieces under the existing threshold? 4. If it is not worth it to get the packs, what should I get instead? 5. What is the piece of wood under the threshold called? (It looks too thick to be subfloor). 6. Since the moisture is getting in (despite the door being under eaves that extend out over 1'), should I do this asap or wait until I'm replacing the entire subfloor in the area? 7. Any suggestions/advice? BONUS: Could anyone please recommend a good lockset with deadbolt that can easily be rekeyed to use existing keys? (Mother would like it in polished brass). Here are some pictures of what I'm dealing with. Let me know if anyone needs more pictures. Rotted sill & whatever that piece is under the threshold along with peeling rotting door (cinderblocks will hopefully be replaced with real steps eventually). Could that be just the edge of the subfloor and substrate that has bloated and separated from moisture damage? Interior view (the edge under the threshold has been rotting and sinking) Closeups of the exterior rot/damage Notes: * I have not yet picked a replacement sliding door (I believe the current one is 72x80) so I am not ready to replace it yet, but it has the same type of damage to the sill-- I will have to get pictures later. * I am considering building a small platform just outside the door so there is more space when stepping out, but I will need to figure out how to do that and make sure it will not rot, warp, or break. I will need to figure out just how large to make it. Maybe something like this only not as deep (and somehow allowing access to the water faucet just just outside on the left).