The pictures look fuzzy/bad quality unless I click on them. Not sure if it’s the same for anyone else, but just in case you’re having to squint to see details, just click and open the pictures 😊

Ooooh, that is some looker. You seem to have gotten some very fine roses with your house.

Many roses grow fine on their own roots, so this one could conceivably not be grafted. If the new growth well up on the stem looks like canes coming from ground level or below, chances are they're all one rose (not root stock).

Root stock varieties are limited, and chances are just a few are used for the roses commercially propagated in your area. If you get to know what those rootstocks look like, you'll be able to differentiate between growth of the grafted part of the rose and rootstock suckers. For example, in my part of the world most shrub roses and climbers are grafted on 'Laxa', a form of the dog rose. Its suckers are quite different from those of most of the roses grafted on to it, the chief confusion being if the grafted rose is in the Alba class. Albas have dog rose in their ancestry, and their growth is similar to that of 'Laxa'. Generally, though, they're easy to tell apart.

Oh, the photos are good in my view of your thread.

This is a great example of HOW to post enough and good enough photos of a rose you are trying to ID! (instead of just one bloom!). Thanks you. You did a great job cleaning it up, too. Gorgeous rose. I presume that when you say "multiple flushes" you mean that it re-blooms all summer and into the Fall? So, you have a lovely white climber which re-blooms - YAY!

Have you noticed whether or not it forms hips? If there are any on it, a photo of one of them would be good too, as well as a close up or two of some of those buds.

To answer your question about thorns, sometimes newer canes take a while to develop them - I would not worry about it at all - less thorns not a problem!

Getting it a structure to climb on is a good idea - otherwise it looks like it will just send out those long canes and fall over again.

It will be interesting to see if the blooms on the new growth match all of the others. Even if they do, it might be rootstock which is now on its own roots, the scion rose long gone. That would not be a problem - it would be a lovely re-blooming climber anyway. I don't know who it is, but someone on here probably will - there are a lot of amazingly experienced folks who post on here.

Jackie

Your rose reminds me of soumbreuil but mine is young and I am not certain.

The bloom form says ”Tea” to me, but the growth habit, foliage and panicle style says modern, so my guess is ’Snowbird’ Climbing.

My guess was Soumbreuil as well. Nice rose, and I’m impressed with your home improvement ambitions!

Bloom form is not right for 'Sombreuil'. IMO. (I'm assuming people are suggesting "Sombreuil of commerce" the Wichurana climber, aka 'Colonial White', not the true Tea 'Mlle de Sombreuil'.)

I'm going with Paul on this one. Check out the photos on these old forum posts of 'Snowbird'.

Catspa's Snowbird

Jeri's Snowbird

Kathy's Snowbird

The leaves are very much like those of 'Snowbird' and that was the first thing I noticed, as they are fairly distinctive. The flower form is also within the realm, though I was trying to figure out how large they are -- looks like the ones when there was a deck are maybe medium-sized blooms, which would be typical. If it is a climbing 'Snowbird', lucky you -- one of the best!

I love the new basals, Madison.

I was also wondering about the size of the blooms, compared to what look to me to be larger, and perhaps more double, ones on the mature Snowbirds. However, of course roses are so variable, and lack of care may make them have smaller blooms too, I guess. The mystery rose's blooms do not appear to be self cleaning - does anyone know if Snowbirds are not also? Anyway, I think it is Snowbird, with the differences due to local issues. Congratulations, Madison, on having such a lovely rose! HMF says the climbing version gets up to 12' high, so keep that in mind when you get a support for it.

Jackie

Some random photos from the many I have of my shrub form of 'Snowbird' :

2021 whole shrub:

Not sure if these zoomed in crops help at all. Thank you all for your advice and answers 🥰

One more

To help show bloom size, the two on the left are the mystery rose, followed by Mrs. B.R. Cant, Belinda’s Dream, and Etoile de Lyon.

Catspa, what a lovely, lovely rose. My unicorn rose. I'm not an expert on Snowbird, but she was the first rose I thought of when I saw the mystery rose. And I did notice the leaves several times. Leaves are not my forte, either. I hope we are correct, and this is a rare climbing SB. Diane

BenT, we have a lovely 1926 bungalow, built from the cypress of three “old houses” (whatever is considered old in 1926). Set on the Mississippi River and moved once (a little further inland) in 1936 when the levees were redone. We love this old girl so much. The projects never end, but we are enjoying making sure she’s always in her best shape! New roof definitely makes going into this year’s hurricane season less stressful. The building shown in some of the pics is an apartment attached by a carport to the actual house. Here is the front of our home. The descendants of the family who built it had a family reunion and visited in May ‘22, and we got to meet Mr. Eddie—the youngest and last surviving member of the Daigle family who built our home. He grew up here, and it was surreal to meet someone part of our home and its history 😁.

No. It's not Snowbird. I know that one well.

'Snowbird' Rose Photo (helpmefind.com)

The bloom looks a lot like 'Gloire Lyonnaise' but golly, there are SO many white roses.

It may very well be growing on its own roots. Have you any idea at all of how long it might have been there?

Jerijen, I’ve reached out to the previous owner since he absolutely loved roses and I’m guessing he planted this one as well as the others, but I haven’t gotten a response. Hopefully he will know something and get back to me. Fingers crossed!

I would take Jeri's ID over my guess.

Catspa, those pictures are absolutely gorgeous! My new buds don’t have that dark hue on the stems like I see in your 2nd pic. This is one perplexing rose I’ve got 😆

Catspa, here is a pic I took today of a bloom with my hand if that helps with showing size.

Can 'Gloire Lyonnaise' display the lanky (climbing) habit of this rose? Or is there a climbing form of it?

@Madison Roussel The photo with hand does help give some perspective. My estimate is that it something like a 2 1/2" to 3" diameter flower, more or less medium size. Your zoomed-in photos of the blooms do give a view of the recepatcles and glands on the pedicels -- not inconsistent with 'Snowbird', but also consistent with other varieties.

It reminds me of my Angel's Camp Tea. The centers can be yellowish like yours, or more pink. Sometimes just white.

I think my plant came from Jackie Day who used to be a partner in the nursery in Pass Christian , MS, Countryside Roses. How much sun does your plant get? Mine was in part shade but fairly upright.