What size drywall for walls?

Drywall Sizes

3/8 ” Drywall – Several decades ago, 3/8″ drywall was the standard thickness. Drywall Sizes: 4′ x 8′ Sheets – This type of drywall is usually only available in one size. Weight per 4′ x 8′ Sheet – 43.65 lb Availability – This thickness is available at most home supply and drywall supply stores.

A question we ran across in our research was “What sizes do drywall come in?”.

Approximate weight Lbs. Per square foot




¼ ” Standard 0.89 28.5 35.5 42.5
⅜” Standard 1.34 42.75 53.25 63.75
½” Standard 1.78 57 71 85
½” Lightweight 1.375 44 58 72

2 more rows Dec 31 2021.

These are determined by the needs of the architect, builder, and client. The most common size of drywall is 4 feet wide and 8 feet long. Since 1/2-inch thick sheets of 4- by 8-foot drywall tip the scales at 57 pounds, this size tends to be the biggest sheet that most do-it-yourselfers can carry and lift into place.

How thick should drywall be?

Requires mining and burning of fossil fuels. The chemical process needed to manufacture it produces greenhouse gasses. Not impact resistant. Disposal methods are tedious. When it degrades it has the potential to create hazardous gasses. Manufacturers have a history of price gouging and have settled lawsuits many times.

How do you measure drywall?

Measure the Wall. Using a tape measure, determine the width of the wall and cut the drywall sheet so it is about a quarter inch shorter than your measurement. Have someone help you prop the drywall up and position it tight against the ceiling. If you need any further help measuring, use our drywall calculator.

What size drywall knives do you need?

The good thing is that drywall knives are not expensive. The 6-inch knife and the 4-inch knife are used for slopping the mud into place and for taping. The 12-inch knife is used for feathering and final coats. You will need either the 4- or 6-inch (they are fairly interchangeable) and the 12-inch knife.

What is the average cost to install drywall?

Drywall installation costs $1,847, with a typical range of $998 and $2,887.. This translates into a price of $1.50 to $3 per square foot for materials and labor. Most homeowners pay $2 per square foot, depending on the number of rooms and the level of finish.

What size insulation for 2×8 walls?

Fiberglass R-19 batt insulation is about 6 inches thick and is available in 15-inch widths, making it the correct size for insulating a two-by-eight floor joist system. Read, more elaboration about it is given here.

What kind of knife do you use to tape drywall?

The 12-inch knife is used for feathering and final coats. You will need either the 4- or 6-inch (they are fairly interchangeable) and the 12-inch knife. If you are going to buy taping and finishing knives, you should also purchase a mud pan to hold the drywall compound you will be using.

Drywall taping knives are cleaned with water and elbow grease. Allowing drywall mud or joint compound to harden on the knife will make it difficult to clean. It may impair its use until all the hardened mud is removed. It can also cause rust to form on the metal of the knife.

What is the thickness of a taping knife?

Drywall comes in thicknesses of 5/8 inch, ½-inch, 3/8 inch and ¼-inch. Taping knives are used to fill holes or gaps in drywall and to fill joints in between using pieces of drywall tape. Taping knives are constructed of wood, metal, rubber and plastic handles.