Green boards are often required by local building codes to be used as a backing for tiles and wall panels in areas that are exposed to moisture; this includes bathrooms, laundry rooms, and kitchens. However, they are not allowed for use in parts of the home that have excess humidity, like near indoor pools.

Can you use regular drywall in a bathroom?

Regular drywall cannot. Regular drywall cannot be waterproofed for use in showers or other bathroom walls and ceilings. “Green board” moisture-resistant drywall can be waterproofed for use in shower walls, but it is not as effective as using a true waterproof backing board.

Should I use green sheetrock in bathroom?

IS GREEN BOARD WATERPROOF? Green board is water-resistant – it is not waterproof. Green board is highly efficient in bathrooms and kitchens, where moisture is frequently in the air, but it is not the drywall that should be set behind tile in your shower or any other areas where it can come in direct contact with water.

Do you have to use mold resistant drywall in a bathroom?

Space prone to moisture such as bathrooms and laundry rooms are also typically most prone to mold – which can be disastrous and costly to the structure of your home. Walls and ceilings in these spaces that are often damp due to humidity or splashing are suitable for mold-resistant drywall.

Is it code to use green board in a shower?

Changes made to the 2006 International Residential Code (IRC) no longer recognize moisture-resistant, paper-faced drywall (commonly known as “green board”) as a suitable tile backing material in wet areas such as tub and showersurrounds.

When to use green board? What is green board?

Can you tile directly to green board?

Never tile over green board in a shower—green board is not waterproof enough to be used for shower walls. Green board can be used as a tile backing in kitchens and bathrooms (excluding shower walls). Never tile directly onto green board that has not been painted with sealer.

What kind of drywall do you use in a bathroom shower?

Green. Green drywall is a type of drywall that’s mold resistant and is used in applications where moisture can be an issue—so most commonly, bathrooms. To maximize the mold resistance, use mold-resistant drywall mud, aka joint compound. Green drywall generally costs about 20% more than regular drywall.

Does green Board prevent mold?

In addition to mold-resistant drywall, greenboard is often used in bathrooms and showers as a mold-preventative building material. Though it’s less effective at preventing mold than mold-resistant drywall, it’s generally also less expensive.

Can you paint directly on green board?

Greenboard is a type of drywall that builders install in homes and other structures, over the beams in the walls. The next step after installing greenboard is to paint over it. The first thing to do is select an effective primer that will allow the paint to successfully cover the green tint underlay.

Is PURPLE board better than green board?

What’s the difference between PURPLE drywall and traditional green drywall? Traditional green drywall (also known as greenboard) is only moisture-resistant. PURPLE drywall, manufactured only by Gold Bond Building Products, is superior because it offers moisture, mold and mildew resistance.

What can I use instead of green board?

Greenboard is still manufactured and sold, but it is slowly being supplanted by paperless drywall that resists moisture and can be used in either dry or moist conditions.

Where should green board drywall be used?

According to the writers at Mr. Handyman, green board is typically recommended for use in place of drywall in areas that are exposed to some moisture. This includes green drywall for bathrooms (in indirect areas outside of the shower and bath), kitchens, basements and laundry rooms, for example.

Why is green board being phased out?

Green Board. Green board is a paper-backed, water-resistant drywall that has a light green “hospital” tint. It is an older form of water-resistant drywall that is gradually being phased out in favor of products that combine both moisture resistance and mold resistance.

Is Green board better than drywall?

Studies show that greenboard is actually weaker than standard drywall when it gets wet and the added thickness helps compensate for this. When installed properly the slightly weaker material isn’t a problem at all and offers superior moisture resistance.

Can you paint green board in bathroom?

Drywall greenboard is water-resistant but not waterproof. It is a good choice for painted bathroom walls and other damp rooms in place of regular drywall, but is not a good option to use under tiles in showers and other wet places. Water may seep through grout and cause mold to grow on the greenboard.

Is green board good for shower walls?

Green board is not the proper backer for a shower stall unless a complete waterproof-membrane system is applied over it.

Does green Board need to be primed before tiling?

Greenboard has a waxy surface that makes it difficult to get tiles to adhere to it. One solution is to coat it first in a layer of Kilz or other flat sealing primer, which will stick to the board while providing a suitable surface to hold the tile.

What happens if Green drywall gets wet?

While drywall is made of some pretty sturdy stuff, it can sustain damage when exposed to water for too long. If moisture damage isn’t addressed swiftly, the structural integrity of the drywall becomes compromised, causing it to become soft, weak and susceptible to mold growth.

Should I use moisture resistant drywall?

While moisture resistant gypsum panels hold up better than traditional drywall in areas that receive unusual amounts of vapor, they do have limitations. Wherever water contact is frequent and direct — such as tub and shower surrounds, saunas and backsplashes — use concrete backer boards instead.

Is green board waterproof?

Green board is a type of drywall that is commonly used in bathrooms. It is moisture and mold resistant, but not waterproof. Green board is used mostly for damp environments, but not to be confused with wet environments.

What is the best backer board for a shower?

Cement board is a good, reliable backer board that works well on both floors and walls. Keep in mind that most tile setters err on the side of caution and brush a waterproofing membrane on top of cement board when it is in wet areas like showers or tub surrounds.

Can you waterproof drywall for shower?

It is possible to waterproof drywall in a shower by covering the drywall with a waterproof membrane. This waterproof membrane can be bonded to drywall with thinset adhesive to create a waterproof layer. Never tile directly over drywall in a shower.


About the Author

Tommy E. Junkins

Head of writers

We believe that everyone needs to have free access to a wealth of information. Feel free to explore our rich categories and find answers to your questions. We hope you enjoy our world.

View All Articles