My house is about 95 years old, and currently has wood clapboard siding that is in pretty rough shape and needs to be replaced. My local lumber yard has 1/2" x 6" for $0.53/linear foot. Since vinyl starts around $2.50/linear foot, I am considering trying the pine out. I would install it myself. I am already close to underwater in my mortgage, and don't want to invest in vinyl right now.
I did a lot of research on the best way to cover the knots in pine, and people seem to have the best luck with this BIN Primer with a shellac base. http://www.rustoleum.com/product-catalog/consumer-brands/zinsser/primer-sealers/b-i-n-shellac-base-primer. People say that it is VERY important to do 2 coats. One that dries at least 30 minutes, and one that dries overnight. Then primer, then paint.
Is it a bad idea to replace the siding with pine? I am in the Northeastern US.