Guide to Standard Drywall Sizes and Thicknesses

When building your own house or making repairs, you’ll need to decide what type of wall and ceiling surfaces you want. Drywall is widely used for interior walls and ceilings because it’s very economical and easy to install. The flat white and clean appearance makes it ideal for ceiling finishes and residential construction.

But choosing the right sizes and thicknesses for drywall isn’t an easy thing, but you definitely won’t need professional help. This guide shows different types of drywall sheets in various sizes and thicknesses. So, you can easily compare them by size, making it easier for you to choose which ones would work best for your project. Let’s get started!

Drywall Thickness

Drywall comes in 3/8″, 1/2″ and 5/8″ thicknesses or in metric 6, 9.5, or 12.7mm. Standard US drywall is 1/2″ (12.7mm) thick, while the other two are called “non-standard.” Building codes also have some requirements when it comes to standard thickness. The building code dictates the thickness of each application.

1/4 Inch-Thick Drywall

This is not very common, and it’s used as a skimming material for placing over an existing surface. You can also use these thin drywall sheets to install drywall on the slightly curved surface. If the drywall is not meeting the curve, you need to add a layer of mesh tape and compound before applying another thin sheet.


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1/2 Inch Drywall

This is the most common type of drywall used in construction, and it can be found in all building and construction material stores and outlets. Thanks to their standard thickness, the regular 1/2″ (12.7mm) sheets are suitable for interior walls. 

They’re very easy to carry and hang. It’s the most versatile board and common thickness for the 16-inch on-center interior walls. It provides a great balance between strength and weight.

5/8-Inch drywall

If your ceilings or walls require a prescribed fire-resistant rating, then this is the right drywall thickness for you. It’s a heavier product that can resist sagging in your ceilings and 24-inch wall. It’s also the thickness standard for fire-resistant or fire-code drywall, mostly found in garages. This added thickness also improves soundproofing.

Due to its excellent soundproofing qualities, 5 8 works well in bedrooms and living areas. However, you’ll have to pay more for this type of drywall than 1 2 inches thick and smaller.

3/8-Inch drywall

When you’re looking to fix drywall patches or if your drywall is damaged and worn out, this is a great drywall thickness you need to consider. It’s the best option for home remodeling projects. Note that it doesn’t offer the strength of 1/2-inch panels.

Drywall Sizes

The length and width of drywall sheets usually come in 4x. The most common ones include 4-foot by 8-foot, 4-foot by 12-foot, and 4-foot by 16-foot sheets. The building codes don’t dictate the requirements for drywall sizes. The sizes are determined by the needs of the architect, builder, and client. 

4-Foot by 8-Foot drywall

This is the most common size of drywall. It’s commonly used because it’s easy to carry. Working and installing this type of drywall is very easy. However, it’s not the best option for remodeling jobs because its small size is limiting. You can’t use this type of drywall in rooms more than 8-feet wide and 12-feet long.

A drywall board size with these dimensions together with the thickness of 1 2 makes it manageable. It’s the biggest sheet ideal for a DIY project because you can easily carry and lift it into place. It allows for both vertical and horizontal installation. 

4-Foot by 12-Foot drywall

For long and tall drywall, you can find drywall in lengths of 12 or 16 feet. So, if you have long and tall walls, go for this size of drywall. If you also want an unbroken line from floor to ceiling and prefer a smooth surface when working with a long and high wall, this is the best solution.

These longer sheets also produce fewer butt joints than 8-foot-long sheets. However, they are heavy to carry by a single person, so if you’re going to install them at your home, make sure you have people around to help you. 

2-Foot by 2-Foot drywall

This type of drywall size is best when you have small spaces. When you also need to do some patchwork around your stairs, alcove, and nooks, opt for this drywall size. It’s not the standard size of drywall, but you’ll find it at local hardware stores and home improvement stores.

lternatives to Drywall Sizes

When your wall panels come in lengths and widths instead of four feet multiples, then those are not drywall panels. They are cement board or drywall alternatives such as DRIcor Smartwall. 4-1/2-foot wide drywall sheets are not very common in the consumer market, but you can get them with special orders. They are rarely available in home improvement centers and are only used by professionals.

Types of Drywall

While standard drywall works well for bedrooms and living areas, there are other types of drywall for special purposes. Here are the types of drywall that you should consider on your next home project. They are excellent in humid areas such as bathrooms, kitchens, and laundry rooms.

Types of Drywall
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Fire-Resistant Drywall

Fire-resistant drywall contains glass fibers and other materials, enabling them to endure flames more than any other type of drywall. You can use it in the laundry room, near furnaces, stairwells, and garage ceilings. It will help reduce flames from spreading in case of fire break out.

In addition, they enable the walls to generate less smoke and are also good for sound control. When renovating your home, the building codes will request you to use a fireboard with fiberglass in areas where you have rooms with wood studs. You’ll also be required to install this type x drywall if you have furnaces, garages, and utility rooms.

buse-Resistant Drywall

This is the type of drywall that can withstand any abuse. It has a polystyrene layer that bonds well to the non-decorative gypsum board.

Mold and Moisture-Resistant Drywall

Both mold and moisture-resistant drywall panels are paperless panels with a special coating that blocks moisture and helps prevent mold growth. So, if you’re wondering how to get rid of mold from your home, installing this drywall will be your first solution. This combination is an excellent choice for bathrooms, kitchens, and laundry rooms. As it reduces mold, it extends the appearance and lifespan of surfaces.

Cement Board Drywall

Cement board drywall is durable drywall that’s designed to be installed on plywood or studs. It is available in 1/2-inch and 5/8-inch thicknesses. The cement board is made by sandwiching a cement core between two layers of fiberglass mat. You can use this type of drywall behind ceramic tile and marble for high moisture areas. It’s the hardest material to cut.

It’s also known as a backer board and can also be used under floors and counters. Its moisture-resistant quality makes it ideal for high-moisture areas.

Standard Sheet Drywall

This is the common type of drywall. It is ideal for residential remodeling and basements. It doesn’t have any interesting features and can be used for ceilings and residential interior walls.

Square-Edged Drywall

This type of drywall is most common, and it’s fitted into standard studs 16 inches apart. If you’re looking to plaster your ceiling or wall, here is the drywall solution for you.

Fire Code Drywall

Fire code drywall is thicker than half-inch material. It has a special gypsum core that resists heat and provides fire protection. Despite having a heavier core, it’s still easy to cut.

Tapered-Edge Sheets

This type of drywall sheet is great for finishing walls. The tapered ends allow the compound fillers between gaps.

Foil-Backed Drywall

They don’t offer much moisture resistance like moisture-resistant boards. But, it’s suitable for areas with less moisture but more for colder temperatures.

FAQS on Guide to Standard Drywall Sizes and Thicknesses

What is the best thickness of standard drywall?

Most drywall measures 1/2-inch thickness, which is the most common for interior walls. This is because they are easy to carry and hang, unlike other types of thickness.

What sizes does drywall come with?

The standard size of drywall includes 8, 9, 10, 12, 14, and 16 feet. However, 8, 12, and 16 work well for residential construction, so you’ll find it in most retail hardware stores.

Is it better to hang drywall vertically or horizontally?

Fire codes require seams to fall on the length of the framing, especially on commercial jobs, so ensure you hang your drywall horizontally. If your walls are 9 feet higher or shorter, hanging your drywall horizontally will leave you with more benefits.

Final Thought on the Guide to Standard Drywall Sizes and Thicknesses

As you can see, it’s very important to be careful when choosing drywall because choosing the wrong size and thickness can break your project. You don’t want to spend a lot of money and time on your home improvement project only to end up with losses.

 

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