Why not leave what you already have. It looks nice.

We want to remove some.windows and doors that aren't functional anymore.

@cat_ky

We want to remove some nonfictional windows and doors

I would paint it a different color so it’s not so obviously siding.

@shadywillowfarm

Like I said, we're trying to replace all of it, I just don't know what other options there are.

I don’t understand your project - it’s a sunroom, the walls are sliders, you are replacing the siding, and some of the sliders too? How weatherproof is the sunroom?

@shadywillowfarm

We are wanting to replace the siding on inside of the sunroom(that used to be the exterior of the house.)

It isn't exposed to the elements, but it isn't heated or cooled, and does get fairly humid with rainy days.

To clarify, we are removing some.windows and doors that are between the house and the sunroom. The have been sealed shut and we never use them, they are just an area we are leaking warm and cool air.

@ Victoria " but what options do we have for the interior walls of the sunroom? "

If your question wasn't so ridiculous it might be laughable but the answer is "you have every option that you can preform and/or afford". There are thousands so surely you don't expect use to list them all,,,,,,,,,,or do you?

@klem1

I'm sorry if my question was laughable. I was genuinely seeking advice from a novice perspective. I understand that I could put any wall finish I want out there. I was trying to figure out if there was a product that people have found success with. I know of drywall, which seems like a bad option given the humidity that it can get. And siding.

@creative cabinets

We are planning to remove an exterior door, we finish the interior with drywall, and use appropriate insulation. But that's all for the interior of the house.

Do I have to have exterior siding on the interior(doesn't see rain, or wind) side of the sunroom? I'll have an area to patch, and our existing hardboard siding in there is rough already. So I'd like to replace it all.

@wacky tacky

Thank you for this. That makes sense. I will.look for an appropriate exterior wall finishing.

The entire exterior of your house needs to be completed weatherproof, per your climate. We understand that a sunroom was tacked onto the exterior. Are the exterior facing walls, doors, windows, of the sunroom weatherproof enough to protect the interior of the house? If you have moisture, cold air, hot air, etc getting into the sunroom then the walls, doors and windows between the sunroom and the house need to be good enough to keep the moisture, cold air and hot out out of the house. Take some more pictures of where the sunroom walls meet the house walls, etc. who is doing the work? Was the sunroom permitted (if required)?

This is my greenhouse lean-to which is just tacked onto a back patio slider we never use. I would never pop the slider out and expect the greenhouse walls to sufficiently protect the interior of the house. I am sure your sunroom is much sturdier, but we need more photos to understand what your situation is.

@shadywillowfarm

Here are more pictures..in the second one you can barely see it, but there's adoor on the far right of the house/sunroom wall that has big gaps and is never used. We'd like to remove it, which would obviously need covering. Our existing siding is hardboard which all need to be replaced, so I was just trying to figure out if the interior of the sunroom needs siding too. I know not to do drywall, buy thought there may be some other options that people know of that I don't.

@shadywillowfarm

I understand what you're saying. We bought this house 4 years ago, so I'm not sure on permitting, but nothing was flagged during the inspection besides the hardboard siding. Hopefully the new pictures help..it's not a small sunroom, it probably 600-700 sq feet. The biggest problem for conditioning it is the storm doors, which we plan on replacing with a true exterior door. After that is finished, I'm not sure if we'll ever put an HVAC unit or anything out there, but the exposure to the elements wouldn't be anymore than if we had a wall of sliding doors. Still not efficient, but not exposed.

Wow, what a nice space!!! Looks like it’s a bit damp for drywall and I think you want to replace it with something that is exterior rated. Question - does the siding have to be replaced in the sunroom, or is it in better condition than the rest of the house? I would paint it (new or old) a different color than the siding to make it feel like an interior room, even if it has to be exterior siding.

Shadywillowfarm

It isn't in terrible condition, it's just if we remove a door from the house to the sunroom, I'm not going to be able to match it. Which is what started me on this whole replacing thing. It's a good idea to paint it a different color.

And that's what I needed to know. We will look for an exterior rated option.

Thank you for your help:)

If you're redoing the siding on the rest of the house, you might be able to salvage enough decent pieces of old siding to fill your hole. Then you can paint it. (The existing color is rather lovely for a sunroom--I'd freshen that up.)

...if I'm even understanding the situation. :)

@iri, that's a great solution I hadn't thought of. I've been so focused on how terrible the hardboard siding it in true exterior situations, but if we can find some make fill in the patch in the sunroom, that may work perfectly.

I'd like to say I'm cheap, but actually I'm just lazy and look for the easiest route.

Of course, I don't know how it interfaces with the exterior and you do want to make sure it doesn't end up with the house looking like a cheesy patchwork. You don't want competing sidings.

If you can’t repurpose some of the old siding to patch the door, what about doing a coat and boot drop area there with hooks on the wall and a bench that would fill in the space?

I am wondering why you want to remove a door. If the door is drafty, I would get it replaced with a better quality one. Its pretty nice to have those doors, in a large sun room, like you have. I also like the siding that is there, it looks pretty decent in the pictures. Yes, it can be painted any color you want in there. It doesnt have to match the color of the exterior. Just make sure you do use exterior paint on it.

@cat_ky

The door I want to remove is the door in the far right of the picture. We have never used it's we have it blocked off on the interior. 

The siding that is there is no longer made, so I was just trying to see what to replace it with.

@ Victoria" The siding that is there is no longer made, so I was just trying to see what to replace it with."

I can't tell for sure from pictures but look at Shiplap Siding and #105 Drop Siding to see if either matches.