What is GA 216?
The GA-216-2021 includes specifications for the application of gypsum panels to flat wall insulating concrete forms (ICFs). This product is popular among residential, multifamily, and commercial builders due to its combination of high thermal mass and insulation, which reduce heating and cooling costs.
What is drywall perimeter relief?
The intent of perimeter relief is to make the ceiling independent from the walls that form the ceiling’s perimeter. This allows the ceiling to freely move, thereby reducing the potential for stresses to build within the gypsum ceiling membrane, which leads to cracking.
What is ASTM c1396?
1.1. 4 Water-resistant gypsum backing board, designed primarily to be used as a base for the application of ceramic or plastic tile on walls or ceilings. This product is also suitable for decoration.
Does control joints matter in wall construction?
There is a reason control joints are considered essential for whatever projects you have in design. Thermal expansion and contraction will occur in buildings – that’s a given – and control joints help prevent resulting cracks and damage.
How often do you install a control joint in a wall or ceiling?
Ceilings: in long expanses of ceilings at 30-foot intervals, with the drywall expansion joint extending the full width of the ceiling, from partition wall to partition wall. Technically, according to expert sources like National Gypsum, drywall movement control joints are recommended at intervals of 30 feet.
Does drywall need an expansion joint?
A drywall expansion joint product or more accurately named, a drywall or plasterboard control joint is installed to provide a cosmetically-finished edge and surface that accommodates movement without damage between sections of drywall.
What is ASTM C475?
ASTM C475/C475M — Standard Specification for Joint Compound and Joint Tape for Finishing Gypsum Board.
What is ASTM C1278?
C1278 – Standard Specification for Fiber-Reinforced Gypsum Panel. Fiberock® Abuse-Resistant Interior Panels.
What is ASTM D3273?
The ASTM D3273 method is meant to evaluate fungal defacement of coated interior surfaces in an accelerated manner. The ASTM D3273 test specifically aims to establish the relative resistance of paint films to the propagation of mold and mildew under optimum fungal growth conditions.
Do you need expansion joints on internal walls?
Movement joints in internal walls are not normally necessary for single dwellings unless the walls are straight and unbroken and over 6m long, in which case the block manufacturer’s recommendations should be adopted. This may include the use of bed joint reinforcement in the courses above and below window openings.
Can you pour concrete without expansion joints?
It can also shift a little with the movement of the earth. Concrete expansion joints give the slabs just enough room to move which helps prevent cracks & buckling. Without these joints, even a little movement creates pressure and stress on the concrete. Eventually weak spots can crack or buckle.
What materials are considered non-combustible?
Examples of non-combustible materials include steel, masonry, ceramics and certain insulating materials (such as fiberglass or mineral wool insulation). Gypsum wallboard is considered by the codes to be non-combustible although it does have a thick paper backing that is combustible.