After one week of framing we have the basic walls up on the first floor of the house. You’ll see the exterior walls all positioned on their anchor bolts and the tops nailed together at corners. There are a lot of diagonal 16 foot long 2x4s nailed across the walls. Those are put in place once the wall has been squared up and made to be perfectly vertical. The diagonal 2x4s are temporary and hold the wall square and true. There are also some bracing 2x4s that are cleat nailed into the wall up high and then into a brace on the concrete. The brace gives the wall some structural strength while the rest of the walls are still being assembled and stood upright. In the concrete foundation a piece of 2x4 or two is nailed into the concrete with a gun powder driven nail gun. It actually uses 0.22 caliber blanks to fire a nail through the wood into the concrete. The brace is then firmly in place and the 2x4 brace is nailed to it to hold the wall. Interior walls are added as a section gets built up which gives it more strength. Interior walls are squared up to the exterior walls and nailed in place along then end and the top is joined with a top plate running along top of the wall. You will see king studs on either side of a window opening running from floor to ceiling to take the weight of the floor or roof above. Usually we had two king studs for each side of the window. Then the next supporting member is called a trim stud or trimmer. The trim stud holds the header above the window on each side. Then the next step is to add trimmers again to hold the sill of the window. Our exterior walls are made from 2x8 lumber and it is extremely strong construction. The original plans had 2x6 walls but we increased the wall thickness and re-reviewed the plans to get them approved for the thicker walls. This allowed us to get enough insulation inside the walls so we did not have to add foam board or other insulation the outside of the house. Adding exterior insulation is more expensive than making the walls thicker. The thicker exterior walls also make the house stronger and quieter. The added mineral wool insulation thickness helps to absorb exterior noise and keep the house very isolated from outside noise. Any solid foam board insulation transmits sound much more than mineral wool does. Along with the thicker walls with more insulation we are installing high efficiency triple pane windows which are nearly a factor of two more efficient than the new title 24 requirements in California as of 2020. The windows will help with energy management and help keep the house temptations very uniform from room to room and space to space.
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