A dimensional 2x4 is 1.5 inches x 3.5 inches. The reason being, 2x4 describes the rough dimensions before the boards are milled down to their "dimensional" (flat/even) size. So you start with a rough …

Jan 6, 2015 · I live in a very old house in Ontario Canada and its built with actual 2x4s, i have no idea how old the house is so i'm hoping to get some idea by finding out when 2x4s were shrunk and …

In Canada, while officially we are metric, all the construction work I've been around is done almost entirely in imperial. Everything comes in the same dimensions, and is referred to in feet and inches. …

Jan 20, 2025 · Ideally, door jamb should be as wide as wall but door jambs are generally made for 2x4 or 2x6 walls, not for 2x6, plus thickness of exterior insulation and rainscreen. Not sure a door …

Feb 26, 2023 · 3 I understand that the actual dimensions of dimensional lumber are slightly smaller than their nominal dimensions, like how a 2x4 is actually 1½" x 3½". Are there industry standard …

May 31, 2019 · 5 I am trying to widen the doorway to a room in a house that was build in 1905. the framing is 16 on center, however the lumber is wider than a standard 2x4. by about a 1/2 inch. (the …

This is similar to this question about metric measurements. In Australia, a common measurement is 90mm x 45mm for timber. A 4x2 would be (approx) 100mm x 50mm but, as I understand it, that is …

Nov 11, 2010 · The 2x4 refers to the rough-cut green wood: it shrinks during drying, then the dried wood is planed smooth, so the finished lumber is supposed to end up at 1.5"x3.5". While it doesn't really …

Apr 15, 2009 · ABOUT DOUBLE 2×4 WALLS Getting to R-40 Builders of energy-efficient or near-zero-energy homes often aim for R-40 walls. Although a variety of methods have been proposed to meet …

Jun 29, 2021 · Note that because of the thickness of the studs the space between the first two studs is actually 15'-1/4" = 16'-3/4", where 3/4" is half the thickness of a 2x4. This configuration ensures that …