[OldNBroken]

We are in WA, and getting into our rainy season. (I know, it's always a rainy season in WA).
Any help would be appreciated!

Only on the rusty side of the state.
A white, rolled roof? Do you mean a membrane or a coating? If you are looking for a short-term fix, yes there are coatings out there that you can get a few more years out of your roof with, depending on the condition of your roof. Try to find a contractor in your area that does elastomeric roof coatings. There are several manufacturers out there that have products and, of course they will all tell you they are the best (just ask them).

If you are looking at doing the maintenance yourself, do not go to a big box store. All the bigger paint stores (united, sherwin williams etc) will have their own line and probably can assist you with advice on proper application.

 

[OldNBroken]

I try to stay on the dry, forgotten side of the state.

I may be mistaken but I think United owns sherwin williams anyways and, like I said, most of them have their own line of acrylic or elastomeric coatings for exactly what you are looking for. I just don't want you wasting your money on snowcoat or some other garbage at HD or the like.
As long as you realize this is just extending the life of the existing roof.

I would recommend you get some quotes on roof replacement as well though, just to see if you are actually saving that much money going this route versus roof replacement. Won't hurt and you'd be that much more informed. (I know it says N. Idaho. born and raised in Spokane and moved a whole 30 miles to CDA)

 

[OldNBroken]

wow, that's gotta be a good sized flat roof for a residence.

Well, check out the coatings and the proper application process. You also need to know if this option will even work depending on the actual condition of your existing roof. Can't do that from here. If you feel confident this is a project you can tackle yourself then go for it and best of luck. Like I said, done right it will buy you a few years life on it.