Magnesium Oxide Board Versus Gypsum Board Pros and Cons Explained

Magnesium Oxide Board Versus Gypsum Board

Magnesium Oxide Board Versus Gypsum Board Pros and Cons Explained

If you want strong walls in 2025, magnesium oxide board is better than gypsum board. Magnesium oxide wallboard fights fire, water, and damage more than gypsum wallboard. Magnesium oxide wallboard lasts longer, even in tough places. New building rules like magnesium oxide wallboard for safety and the environment. Gypsum wallboard is cheaper at first, but magnesium oxide wallboard saves money on repairs and insurance later. Here is a cost comparison:

Material

Cost per square foot

Gypsum Board

$0.30 – $0.70

MgO Board

$1.50 – $3.50

If you want strong walls or need to stop mold, magnesium oxide wallboard is better than gypsum wallboard.

Key Takeaways

  • Magnesium oxide board is very good at stopping fire. It can last up to four hours without burning. This makes it a safer choice for buildings.

  • Magnesium oxide board works best in wet places like bathrooms and kitchens. It does not let water or mold damage the walls. This helps keep walls strong.

  • Magnesium oxide board costs more at first. But it saves money later because it lasts a long time and needs little fixing.

  • Gypsum board costs less and is simple to put in. It is good for fast jobs in dry rooms. But it might need more repairs as time goes on.

  • Picking magnesium oxide board helps the environment. It makes less pollution and people can recycle it.

Fire Resistance Comparison

Magnesium Oxide Board Fire Safety

You want walls that keep you safe from fire. Magnesium oxide wallboard is very good at stopping fire. This board does not catch fire, even when it gets very hot. It can stop fire for up to four hours at 1,472°F. Many lab tests and building rules show this is true. Magnesium oxide wallboard passes the ASTM E136 test and gets an A1 non-combustible rating. Insurance companies say magnesium oxide wallboard is a top pick for fire safety. If there is a fire, you get less smoke and no bad fumes. The board lets out water vapor, which helps slow the fire down.

Here is a table that shows how magnesium oxide wallboard compares to other materials:

Material

Fire Resistance Rating (ASTM E84/UL 723)

Fire Resistance Characteristics

Magnesium Oxide (MgO) Boards

0/0 (Flame Spread/Smoke Developed Index)

Class A1 fire product; does not burn and releases water vapor to help stop fire.

Plywood

N/A

Not flame-resistant; can help fire spread.

Oriented Strand Board (OSB)

N/A

Not fire-resistant; can help fire spread.

You can see that magnesium oxide wallboard works better than the others. It does not let flames spread and makes almost no smoke. You can use mgo boards in homes, schools, and offices for more safety.

Tip: If you build where fire rules are strict, magnesium oxide wallboard helps you follow those rules.

MgO Board On Fire ProtectionGypsum Board Fire Safety

Gypsum wallboard also helps protect you from fire, but it works in a different way. The middle of gypsum wallboard has water, which slows fire for a short time. You get fire protection for 30 to 60 minutes in most cases. Some special gypsum wallboard types last up to four hours, but they cost more and need extra steps to install. Gypsum wallboard can crack or break if it gets too hot. It makes more smoke than magnesium oxide wallboard. Insurance companies think gypsum wallboard is okay, but not the best for fire safety.

Here is a table that compares magnesium oxide wallboard and gypsum wallboard:

Board Type

Fire Resistance Duration

Structural Integrity

Smoke Production

Temperature Resistance

Magnesium Oxide

Up to 4 hours

Maintains integrity

Less smoke

Up to 1200°C

Gypsum

30 to 60 minutes (up to 4 hours under specific conditions)

Can crack or break

More smoke

Lower than MgO

You can see that magnesium oxide wallboard gives you better fire protection and lasts longer. Gypsum wallboard is fine for simple needs, but magnesium oxide wallboard is better for fire safety.

Moisture and Mold Resistance

MgO Board Performance

You want walls that do not get weak from water. Magnesium oxide wallboard stops water from getting in. You can use it in bathrooms, kitchens, and basements. It does not soak up much water. Many tests show magnesium oxide wallboard stays strong. Over 1,000 samples did not bend or break after two years in wet air. The panels did not show water drops. Even after 840 days at 90% humidity, magnesium oxide wallboard kept water out. You get safe walls in places with lots of water.

Note: MagPanel® stays strong in cold and wet weather. You can trust magnesium oxide wallboard in places with lots of rain or snow.

Here is a table that shows how magnesium oxide wallboard does in water tests:

Test Condition

Boards Tested

Duration

Humidity

Key Findings

Exposure Test i

MOC Boards (A-F), MOS Boards (G-H)

840 days

90% RH

Boards A and D did not show water drops after 840 days. MOS boards did not cry after two years in wet air.

Magnesium oxide wallboard keeps mold away and helps your home stay safe.

Traditional Gypsum Board Performance

Gypsum wallboard does not stop water and mold as well. You see problems when you use gypsum wallboard in wet rooms. It can soak up 3% water. This makes mold grow and hurts the wall. Gypsum wallboard can break and lose its shape when wet. You may need to change it often in bathrooms or basements. In wet or cold places, gypsum wallboard gets weak.

Here is a table that compares water resistance and mold risk:

Material

Moisture Resistance

Mold Risk

MgO Board

Excellent (0.34% water)

Low

Gypsum Board

Poor (3% water)

High

Magnesium oxide wallboard is best for wet places. Gypsum wallboard works better in dry rooms. If you want walls that last, magnesium oxide wallboard is the best pick.

Durability and Strength

Magnesium Oxide Board Durability

You want walls that stay strong for many years. Magnesium oxide wallboard is tough and strong. You can use mgo panels in busy places. These panels do not crack or bend easily. They last longer because they resist water, fire, and damage.

  • Mgo panels are great at stopping fire and bending.

  • The compressive strength of mgo panels is between 12 and 25 MPa. This means the panels can hold heavy things without breaking.

  • Mgo panels are strong when you push or pull them. They do not snap or break.

You can trust magnesium oxide board in schools and hospitals. Mgo panels stay strong even if people bump into them. MagPanel® gives a 5-year warranty for defects. This shows that makers believe in magnesium oxide wallboard.

Here is a table that compares how well the panels handle hits and busy places:

Material

Impact Resistance

Suitability for High-Traffic Areas

Mgo panels

Superior

Yes

Gypsum board

Less strong

No

Tip: If you want walls that are tough and hard to damage, pick mgo panels.

Gypsum Board Durability

Gypsum board is not as strong as you may think. It works best in dry and quiet rooms. In busy places, gypsum wallboard gets chips and dents. It cannot hold heavy things well. You need extra help like metal frames or more studs.

Gypsum wallboard does not stop water. Water makes it weak and moldy over time. You may need to change gypsum wallboard often in wet rooms. Some special gypsum boards were tested for bending. They broke quickly when pushed hard. This means gypsum wallboard can break fast when stressed.

Here is a table that shows common problems with gypsum wallboard:

Disadvantage

Why It Matters

How to Reduce the Risk

Moisture Sensitivity

Gets weak and moldy over time

Use moisture-resistant board, improve ventilation

Low Load-Bearing

Cannot hold heavy things easily

Add studs or metal frames for support

Impact Vulnerability

Gets chips and dents from hits

Use stronger board in busy places

You see that mgo panels are better at handling hits and staying strong. Magnesium oxide wallboard is best for places that need tough walls. Gypsum board works better in quiet, dry rooms. If you want walls that last, magnesium oxide wallboard is the best choice.

Environmental Impact

Environmental Benefits Of Magnesium Oxide BoardMgO Board Sustainability

You want to use building materials that are good for the earth. Magnesium oxide wallboard is a green choice. Making mgo panels traps carbon dioxide, which means less pollution. Mgo board only makes 340 kg of CO2 for each ton made. This is much less than gypsum wallboard. Getting magnesite for mgo panels uses surface mining. It does not need bad chemicals. You do not have to worry about asbestos, formaldehyde, or benzene with magnesium oxide wallboard.

You can recycle mgo panels all the way. Leftover mgo board can be crushed and put in soil as food for plants. Builders call mgo panels “nutritional waste” because they help the earth after use. Mgo panels also keep bugs away, so you use fewer bug-killing chemicals. This makes magnesium oxide wallboard even better for the planet.

Tip: If you want a green building, mgo panels help you meet eco rules and lower your carbon footprint.

Here is a quick look at carbon emissions:

Material

CO2 Emissions per Ton Produced

Magnesium Oxide Wallboard

340 kg

Gypsum Wallboard

740 kg

Gypsum Board Sustainability

Gypsum wallboard is used a lot, but it hurts the earth more. Making gypsum wallboard gives off 740 kg of CO2 for each ton. Mercury can also get out during the making process, especially with FGD gypsum. Mercury is very bad for people and animals. The U.S. EPA made rules to stop mercury from getting out of factories.

It is hard to recycle gypsum wallboard. Most recycling places will not take it, so a lot goes to landfills. Builders throw away about 300,000 tonnes of gypsum wallboard every year. This is bad for the environment.

Environmental Concern

Description

Carbon Emissions

High emissions during manufacturing

Mercury Release

Mercury can escape during FGD gypsum production

Recycling Challenges

Few recycling options for gypsum wallboard

Waste Generation

Large amounts of waste from new construction

Gypsum wallboard does not keep bugs away like mgo panels. You may need more chemicals to stop bugs. If you want to build green, magnesium oxide wallboard is the best choice.

Cost and Value

Magnesium Oxide Board Cost

When you look at the price of magnesium oxide wallboard, you see that it costs more than gypsum wallboard at first. You pay between $1.50 and $3.00 for each square foot of mgo panels in North America and Europe. The price per square meter ranges from $16.14 to $32.29. You also spend more on installation because mgo panels are heavier and need special tools. Many builders say that mgo board takes extra time to install. You pay more for labor.

Board Type

Price per Square Foot (USD)

Price per Square Meter (USD)

Magnesium Oxide Board

$1.50 – $3.00

$16.14 – $32.29

Gypsum Board

$0.50 – $1.50

$5.38 – $16.14

You save money over time with magnesium oxide wallboard. Mgo panels last 20 to 30 years. You do not need to repair or replace them often. You spend less on maintenance because mgo panels resist water, fire, and mold. Many homeowners see that mgo panels give better long-term value. You avoid frequent repairs and replacements.

Tip: If you want walls that last and save money in the future, magnesium oxide wallboard gives you strong long-term value.

Gypsum Board Cost

You pay less for traditional gypsum board when you buy it. The price is about $0.50 to $1.50 per square foot. Gypsum-based sheetrock is easy to install. You spend less on labor because it is light and simple to cut. Many builders use gypsum wallboard for quick projects.

Cost Factor

MgO Panels

Gypsum Wallboard

Initial Material Cost

Higher ($2.50 – $3.50/sq. ft.)

Lower ($0.40 – $1.00/sq. ft.)

Installation Cost

Higher

Lower

Maintenance Cost

Low

Moderate

Long-term Durability Savings

High

Low to moderate

Total Lifespan

20-30 years

10-15 years

Total Lifecycle Cost

Lower over time

Higher over time

You may spend more on repairs with gypsum wallboard. Water, mold, and dents can damage gypsum-based sheetrock. You might need to replace panels in bathrooms, basements, or busy rooms. Many people find that the total cost of gypsum wallboard goes up over ten years. You get less long-term value from gypsum board compared to mgo panels.

Note: If you want a low upfront cost and quick installation, gypsum wallboard works well. If you want fewer repairs and better durability, mgo panels offer more value.

Installation and Handling

Fireproof Wall Panels InstallingMgO Board Installation

Installing magnesium oxide wallboard is not easy. Mgo panels weigh more than gypsum wallboard. You need more people to lift them. It takes longer to put them on ceilings or tall walls. You should plan for higher labor costs. You need special tools to install mgo panels. You must be careful so you do not break them.

Here is a table with problems contractors see when using magnesium oxide wallboard:

Challenge

Description

Moisture Absorption

Boards can take in water from the air when it is humid. This can cause water drops to form.

Corrosion

Water with salt can make metal fasteners rust faster.

Mold Growth

Too much water can make mold grow on the boards and other surfaces.

Cracking

Some boards can crack. You need space and sealant, but this can be hard to do.

You should keep mgo panels dry before you use them. If you work in a wet place, check for water drops and use fasteners that do not rust. If you do not leave space between panels, they may crack. Sealant helps stop cracks, but it costs more and takes time. Mgo board is better at stopping fire and water, so the extra work can be worth it in wet or risky places.

Tip: Wear gloves and lift mgo panels slowly so you do not get hurt or break them.

Gypsum Board Installation

Gypsum wallboard is light and simple to use. You can cut and put up panels fast with regular tools. Workers do not get tired as quickly. You finish jobs faster. You do not need special fasteners or sealant in most rooms. Gypsum wallboard works well for ceilings and walls in dry places.

Here is a table that shows weight and handling:

Board Type

Weight Characteristics

Handling Impact

Magnesium Oxide

Heavier than gypsum

Needs more work and time, especially for high walls.

Gypsum

Lighter

Easier to carry, so workers do not get tired.

You save money on labor with gypsum wallboard. You can use it in homes, schools, and offices without problems. If you want to finish fast and easy, gypsum wallboard is a good pick.

Note: Always check if the room is dry before you put up gypsum wallboard. This helps stop mold later.

Best Use Cases

When to Choose Magnesium Oxide Board

You need walls that stay strong in hard places. Magnesium oxide wallboard is best for safety and strength. It works well where there is lots of water, heat, or people. Mgo panels stop fire, mold, and water from hurting buildings. These panels last many years, so you spend less on repairs. Builders use magnesium oxide wallboard in homes, offices, and schools. You also see mgo panels in hospitals and modular homes. If you want to help the earth, magnesium oxide board gives you green building points.

Here is a table that shows where mgo panels work best:

Use Case

Benefits

Applications

Fire Safety

Great at stopping fire, good for safe places

Offices, schools, hospitals

Moisture Resistance

Stops water, mold, and mildew, good for wet rooms

Bathrooms, kitchens, basements

Durability

Strong and lasts long, saves money on repairs

Homes, modular homes, commercial

Environmental Impact

Helps get green building awards

Many commercial and residential

Installation Efficiency

Easy to put up, saves time and work

All types of buildings

Tip: Pick magnesium oxide wallboard for places with fire danger, lots of water, or busy use.

When to Choose Gypsum Board

You want walls that look nice and cost less. Gypsum wallboard is good for dry rooms and quick jobs. You can use gypsum board for many designs. It bends into arches or special shapes for style. Builders use gypsum wallboard in homes, offices, restaurants, and cafes. Gypsum board helps air stay clean inside, which is good for health. It also keeps rooms warm or cool, so you save energy.

Here are the best ways to use gypsum boards:

  • Homes where you want cheap and easy walls.

  • Offices, restaurants, and cafes for flexible designs.

  • Rooms that need quiet, like bedrooms or meeting rooms.

  • Spaces with cool shapes, like arches and niches.

  • Projects that want to save energy and have clean air.

Note: Use gypsum board for dry rooms, creative looks, and jobs where you want to save money and finish quickly.

Quick Comparison Summary

MgO Subfloor InstallationPros and Cons Overview

You want to pick the right wallboard for your project. This table shows how magnesium oxide board and gypsum wallboard do in important ways:

Feature

Magnesium Oxide Board (MgO)

Gypsum Wallboard

Fire Resistance

Non-combustible, A1 rating, withstands extreme heat

Slows flame spread, lower fire resistance

Moisture Resistance

Excellent in humid environments, resists water damage

Vulnerable to water, can swell and mold

Durability

Highly impact-resistant, longer lifespan

Prone to cracking and damage

Cost

Higher upfront costs

More affordable, budget-friendly

Environmental Impact

Eco-friendly, made from sustainable materials

Can be recycled, but often ends up in landfill

Magnesium oxide board gives better fire and water safety. It lasts longer and is good for the earth. You pay more at first, but you save money later. Gypsum wallboard costs less and is simple to put up. It works best in dry rooms and easy projects.

Here is another table that shows how each board works in buildings:

Key Aspect

Magnesium Oxide Board

Gypsum Wallboard

Weight

Heavier and denser

Lighter

Strength

High impact resistance

Adequate for most rooms

Sound Insulation

Superior

Decent

Installation

Needs skilled labor

DIY friendly

Typical Applications

Wet, busy, or risky places

Dry, quiet, or decorative

Tip: Use magnesium oxide board for places with fire danger, water, or lots of people. Pick gypsum wallboard for dry rooms, fast jobs, and cool designs.

Pros and Cons at a Glance:

  • Magnesium oxide wallboard:

    • 👍 Great fire and water resistance

    • 👍 Very strong and lasts long

    • 👍 Good for the planet

    • 👎 Costs more

    • 👎 Harder to put up

  • Gypsum wallboard:

    • 👍 Cheap

    • 👍 Easy to install

    • 👍 Best for dry rooms

    • 👎 Not as strong against fire and water

    • 👎 Does not last as long

You can use magnesium oxide board in tough spots. You can use gypsum board in simple, dry rooms. Magnesium oxide board helps you build safe, strong, and green walls. Gypsum board helps you save money and finish work fast.

You can spot big differences between magnesium oxide board and gypsum board. Magnesium oxide board is better for fire safety. The table below shows how they compare:

Material

Fire Resistance Rating

Notes on Fire Resistance

Magnesium Oxide Board

Up to 1-2 hours; noncombustible

Superior fire protection

Gypsum Board

Needs extra layers

Less fire resistance unless enhanced

Experts say magnesium oxide board works well in busy places. It does not break or get wet as easily as gypsum board. Think about these things when picking a board:

  • Magnesium oxide board lasts longer and saves money later.

  • Gypsum board is cheaper at first but needs more fixing.

  • Some people think magnesium oxide board is hard to put up, but good brands and the right steps help a lot.

Make sure to think about safety, strength, and cost before you choose.

FAQ

What makes magnesium oxide board better for wet areas?

You get strong protection from water with magnesium oxide board. It resists mold and does not swell. You can use it in bathrooms, kitchens, or basements. Gypsum board absorbs water and may grow mold.

Can you install magnesium oxide board by yourself?

You can install magnesium oxide board, but it feels heavy. You need help to lift panels. Use gloves and special tools. If you want an easy job, gypsum board is lighter and simpler to handle.

Does magnesium oxide board cost more than gypsum board?

You pay more for magnesium oxide board at first. It lasts longer and needs fewer repairs. Gypsum board costs less, but you may spend more on fixing damage over time.

Is magnesium oxide board safe for the environment?

You help the planet when you choose magnesium oxide board. It uses fewer chemicals and creates less pollution. You can recycle it. Gypsum board often ends up in landfills.

Which board is best for fire safety?

You get top fire protection with magnesium oxide board. It does not burn and keeps you safer. Gypsum board slows fire but does not stop it as well.