7. A house wrap (Tyvek) has several advantages over standard building papers. Describe two of them. 9. 1. 8. a) What is "Engineered Lumber?" 2. b. Give one example of Engineered Lumber 10. 11. The new dimension of a 2 x 4 when dressed is :: a) 2 x 4,. b) 1 x 3 %, c)1-3/4 x 3-5/8, d) 1-3/4 x 3-3/4. House wraps and building papers are important because they (circle your answers) a. b. Provide a barrier through which water vapor cannot pass. Protect the wall sheathing from moisture. C. Provide additional insulation d. e. 1. Reduce outside air infiltration Reduce the ambient outside air temperature None of the above Plywood as a construction material has one great advantage: a) never splits b) resists warping c) doesn't contain glue d) is cheaper than pine. 12. Wood headers for rough openings in bearing walls should be placed a) flat b) on end c) on edge