Sourdough not rising sufficiently unless I add heat. Help pls.

So basically if i proof it in my oven which has a bread proofer it comes out fine. Otherwise, let’s say my house is 68-70F inside and outside is like 15-25F. No matter how long i let it sit, it won’t rise enough. I’ve waited 10 hours and still no sufficient rise. If i bake it, it doesn’t really expand much and turns out quite dense. I don’t want to/can’t always use the proofer so i come to you for help. Thank you!