And it takes up so much square footage. It is a 2×6 wall with drywall, insulation, and sheathing. This is constructed by having a 2×4 stud-wall, then a gap, and then a second stud-wall, either 2×4 or 2×3. The walls are then filled with insulation. In my opinion it's a waste of lumber and poor planning to have to double the bottome plate. A normal wall will have 2×4 lumber used for framing separated by 16 inches. Transitional Farmhouse style home plan with 4 bedrooms and 3.5 baths is designed with 2x4 exterior wall framing but can be ordered with optional 2x6 framing for a $275 fee (Plan #142-1185). One alternative to standard frame construction is a double stud-wall. Large openings in the wall are made for windows and doors. At the perimeter, the building has two separate 2x4 walls, with the inner wall set 5 inches inside the outer wall, allowing for a total of 12 inches of insulation and virtually eliminating thermal bridging through the studs. The exterior double-stud wall assembly is the load-bearing wall because the bottom plate of the inner wall lands on the slab. Double plating is most common on load-bearing walls unless the roof rafters or trusses and floor joists stack directly over the studs in the wall, then a single top plate can be used. Headers. Staggered Stud Wall Construction. This 2,742-sq.-ft. Most wall framing is done with 2x4 or 2x6 lumber, but it may be possible to use 2x3's to build a new, non-load bearing, interior wall. The two walls are built so that the studs are offset, so there is the maximum amount of insulation … The top plate can be either single or double. Figure 3: Examples of Typical BPC double wall Construction Figure 3 shows some of the different ways BPC builds its walls. The SIP option would probably cost more for material, but would go up faster. This is the most common method of home building, and the one that people in North America & Canada are most used to seeing. Wood Wall framing with 2x4 and 2x6 studs: Wood frame construction with timber studs image via Wikimedia. The 2x4s will be attached to the bottom and top plates. However, to simplify and speed up framing, every opening in each wall is framed with a header. A couple of things to consider would be that SIP's rely on the interior and exterior sheeting as their structural member. A double 2x4 wall should be cheaper to construct and easier to run electrical and plumbing. ProTradeCraft.com has been following Ben Bogie and his crew as they build a house in Portland, Maine, that features 12-inch-thick double-stud walls. Tim finds that building every … By code, 2x3's may be used for this purpose if the wall is no taller than 10 feet and … The framing … With the amount of windows in houses nowaways, double 2x4 walls seem kind of a waste of time. Then, a thick layer of rigid foam and an outer layer of sheathing. It may be well worth it, depending on your needs and where you live. It may be more of a benefit in colder climates than where I live but my experience is that ceiling insulation is much more important than wall insulation in sunny, warm climates. If I’m making the call, I’d stick with doubles and rack up framing savings elsewhere, like right-sized beams, headers, posts, trimmers, king studs, cripples, wall studs, and foundations. Or, I've worked on jobs where someone used the excuse that it made for easy nailing of baseboard. Accordingly, structural headers are used in the outer wall. The first example on the left is a single/double wall hybrid construction. Re: Double 2x4 Bottom Plate Andy, maybe there was an interior load-bearing wall that someone thought needed the extra beef on the bottom. In a staggered wall, the top and bottom plates are normally 6 inches wide. The bottom and top plates are 4 inches wide as well.
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