January 08, 2015 Subfloor √ January 08, 2015/ Tami McCormick Day 3 of A's warm up meant subfloor time. Her room is so much warmer than before! We had to add support for the floor in one spot. We used 3 4x8 sheets of 3/4" plywood to give us a good footing. First layer done (3/4")! On to the next layer, we used a 1/4" thick sheets to give us a smooth transition to the other half of the subfloor we did not have to take out. Second layer done (1/4")! Subfloor check!! We actually got all the felt paper done! Tomorrow we start laying the floor, woot woot! You can click here to read about how we insulated the crawlspace and here to find out what we put on for flooring.