Would it be wise to use hemlock lumber for framing walls in a basement? The basement is completely dry, with solid concrete foundation. Unless it's kiln dried first, I'm assuming it wouldn't be wise, but I wanted to get some opinions. I'm planning to buy standard lumber from the box stores anyway, but was just curious if anyone has used hemlock or other rough cut lumber in a basement... I have used hemlock from local sawmills exclusively for my outdoor buildings, and since I have to use 10' foot 2x4's for my walls in the basement, it's just much more appealing (much cheaper) buying hemlock over lumber from a big box store...

I'm looking to better seal off my basement from my bulkhead exit. I have a door in my basement, which leads to a few steps and the bulkhead door. On the exterior side of the basement door, you can see the rigid foam insulation to the left and right of the door. I'm looking for a way to better partition off the basement from the steps leading to the bulkhead door, both to keep the cold air out in the winter, and to make it more difficult for any mice to enter.