![]() ![]() Drywall is not suitable for areas prone to moisture, like bathrooms, and can develop mold and mildew.Drywall is not as durable as lath and may not last as long.Drywall is not prone to developing cracks like lath.The smooth surface makes it easy to paint, wallpaper, or finish with other decorative touches.Drywall is fire-resistant and thus is an ideal choice for walls and ceilings.Drywall installation is quick and easy, making it a cost-effective solution.This material is easy to cut and install, making it a popular choice in most modern buildings. What is Drywall?ĭrywall, also known as gypsum board or sheetrock, is a material made of gypsum plaster sandwiched between two sheets of paper. The wooden lath may attract pests like termites and rodents.If not installed correctly, lath can develop cracks and cause the plaster or stucco to fall off.The installation requires skilled professionals.Installing lath is time-consuming and labor-intensive.Lath can be used in areas prone to moisture such as bathrooms and kitchens.The wooden lath can be easily shaped to fit unusual or uneven surfaces.It provides greater insulation compared to drywall.Once the lath is in place, the plaster or stucco is applied on top of it to create a smooth and durable finish. Lath, also known as plasterboard, is a material consisting of narrow strips of wood or metal that are used to create a base for plaster or stucco. This framing factor is dependent on how the wall studs are laid out.Summary: Lath vs Drywall: Which is Best for Your Building Project In summary, you can calculate the effective R-value of a wall assembly by taking the sum of the individual R-values of each “layer” of the wall and adjusting it by a framing factor. This means the U-value per inch would be 1/1.25 = 0.8. For example, soft pine wood studs typically have an R-value per inch of 1.25. The U-value is simply the reciprocal of a given R-value. You may come across U-values (a measure of heat transfer) when researching R-values (a measure of heat resistance) of a given material. The equation used in this calculator for wall R-value is as follows:Įffective Wall R-Value = ( 1/(FF/(R stud) + (1-FF)/(R cavity.insulation))) + R + R siding + R exterior.insulation + R sheathing + R interior.cladding + R This “framing factor” is taken into account and adjusts the effective wall R-value accordingly. This, in turn, leaves more room for the superior insulating qualities of stud cavity insulation. This is because wider spaced stud walls have fewer studs overall. 24″ on center) will have better insulating properties than a stud wall with narrower spacing (i.e. The insulation value of the wood studs is also taken into account in this calculator. These R-values account for the microscopic layers of “air insulation” that form on the interior and exterior finishes of walls. Wall R-Value Tips Air FilmĪn R-value of 0.21 for an exterior air film and 0.68 for an interior air film is added in to the calculation. Hit “calculate” to see the effective R-value of your wall. This is typically drywall or wood paneling. Many homes still use fiberglass batts or blown in insulation between studs.įinally, choose your interior cladding or wall covering. The stud cavity insulation is the most important insulation component of any wall. Typically, a continuous layer of plywood sheathing is used to prevent racking and to add rigidity to stud-framed structures. Many modern homes have a continuous layer of rigid insulation wrapping the home to help minimize thermal bridging through studs.Ĭhoose your wall sheathing next. Next, choose your exterior insulation, if applicable. Note there is also an option for metal/vinyl siding that comes backed with a layer of insulation. Typical siding choices for many homes built today are vinyl or wood siding. Most commonly this is either 2×4 (3.5″ width) or 2×6 (5.5″ width).Įxterior cladding is a fancy term for siding. If your wall is built with advanced framing techniques, choose either the 16″ or 24″ advanced framing option. Check out the framing calculator if you need to calculate materials for wood stud framed walls. Typically, this is either 16″ or 24″ on center. First, enter the stud spacing for your wall. ![]()
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