Snow glitching and going through blocks

So I created a world about a couple weeks ago maybe even a month. I had recently taking on the build of a mountain side house. I start the process and I saw the snow before I came and thought this would be cool! Now a couple days or so later I’m near the finish.... I’m putting the roof on the second floor..... I made sure I had torches on the top to slow the build up of snow. Only to find out it’s still glitching through the house. I have another part (which it will be the all stone video with a window) anyway this part I built blocks on top of and put torches all around to avoid snow sticking. Also I should add that the snow doesn’t stick when glitching through.