
03 Jun What Is The Best Board For a Subfloor?
Table of Contents
When picking the best mgo subfloor, you need it to be strong, water-resistant, and affordable. MGO boards are a great choice for a subfloor. They are tough and resist mold, water, and fire, saving repair costs later. Plywood is also good and holds heavy weight well. OSB is cheaper and works if money is tight. Each type has its own benefits, so choose based on your needs.
Key Takeaways
MGO boards are the best for subfloors. They resist water, mold, and fire, making them great for wet or busy areas.
Plywood is strong and cheap. It works well in most places and handles heavy weight and moisture.
OSB is a low-cost choice. It’s good for less-used areas but not for wet spaces because it absorbs water easily.
Think about how easy it is to install. Lighter boards like plywood and OSB are simpler for DIY projects, saving time and work.
Always pick a subfloor that fits the room’s needs. Choose based on strength, water resistance, and how it works with your flooring.
Types of Boards for Subflooring
Plywood
Plywood is a common pick for subfloors because it’s strong. It can handle heavy weight and lasts a long time. If you need a sturdy base, plywood is a good choice. It’s made by gluing thin wood layers together, which makes it tough.
One big plus of plywood is that it resists water. It doesn’t easily swell or bend, so it works well in wet areas. For example, bathrooms and kitchens often use plywood subfloors. It also works with most flooring types, so matching isn’t a problem.
Studies show plywood holds nails and staples better than OSB. This means your flooring stays in place longer. But plywood can move sideways more than OSB, which might matter for some projects.
OSB (Oriented Strand Board)
OSB is a cheaper option for subfloors and fits tight budgets. It’s made by pressing wood pieces and glue into flat panels. While not as strong as plywood, it works for most home projects.
One benefit of OSB is its smooth surface. Unlike plywood, it doesn’t have knots or flaws, making it easier to use. This is helpful for floors needing a flat base. But OSB doesn’t resist water as well as plywood. If it gets wet for too long, it can swell and weaken.
When comparing plywood and OSB, OSB moves less sideways, which helps in some cases. It’s fine for areas with light to medium use if you keep it dry.
MGO (Magnesium Oxide) Board
MGO boards are the best choice for tough, water-resistant subfloors. They’re made from magnesium oxide, a strong and stable material. These boards are great for wet or humid places.
MGO boards stand out because they resist mold, fire, and water damage. They stay strong even in harsh conditions, making them perfect for basements or busy areas. They also help with temperature control because they don’t conduct heat well.
Studies show MGO boards are non-flammable, adding safety to homes. Special additives make them even better at resisting moisture. If you want a durable subfloor, MGO boards are the top pick.
Cement Board
Cement board is a strong choice for subfloors in wet areas. It’s made from cement mixed with fibers, making it tough and stable. If you plan to use tile flooring, cement board works well. It gives a flat base that stops tiles from cracking.
A key feature of cement board is its ability to resist water. Unlike wood, it doesn’t soak up water, but mold can grow if it stays damp too long. This makes it good for bathrooms and kitchens. Adding a waterproof layer helps protect it even more.
Here’s how cement board compares to other materials for water resistance:
Material | Moisture Resistance |
---|---|
MgO Boards | |
Cement Boards | Resists water but may get surface mold |
Cement board also resists fire, adding safety to your home. It’s heavier than plywood or OSB, so you might need help installing it. Once installed, it’s strong and works with many flooring types.
If you need a subfloor that handles water and heat, cement board is a good pick. Seal it well to make it last longer.
Particle Board
Particle board is a cheaper option for subfloors but has downsides. It’s made by pressing wood chips and glue into sheets. This makes it light and affordable, great for low-cost projects.
However, particle board isn’t as strong as plywood or cement board. It swells and bends when wet, so it’s not good for bathrooms or basements. Use it in dry places like bedrooms or closets with little foot traffic.
One benefit of particle board is its smooth surface. It’s easy to work with and suits flooring like carpet. But it doesn’t hold nails or screws well, which can cause flooring problems later.
While particle board saves money upfront, it’s not the best for long-term use. If you need strength and water resistance, consider other options.
Key Factors to Think About
When picking the best board for your subfloor, consider a few key things. These will help you choose a material that works well and lasts a long time. Let’s look at the most important ones.
Strength
Strength is one of the top things to think about. You need a subfloor that can handle daily use without breaking. Boards like plywood and MGO are strong and last a long time. They can hold heavy furniture and lots of foot traffic without bending.
For busy areas like living rooms or hallways, strength is very important. A sturdy subfloor keeps your flooring in place and stops it from sagging. It also helps you avoid expensive repairs later.
Tip: Always check the board’s quality before buying. Better materials last longer and handle pressure better.
Water Resistance
Water can damage a subfloor if you’re not careful. That’s why water resistance is so important. Some boards, like MGO and cement boards, are great at resisting water. They don’t swell or weaken when wet, making them ideal for bathrooms, kitchens, and basements.
But boards like OSB and particle board don’t handle water well. If they get wet, they can warp or lose strength. For humid areas, it’s smart to pick a board with good water resistance.
Note: Even water-resistant boards can use extra waterproofing. Adding a layer of protection helps them last longer.
Price
Price is always something to think about when planning a project. You want a subfloor that fits your budget but still works well. Plywood and OSB are good choices because they balance cost and performance. They’re cheaper than high-end options like MGO boards, making them great for saving money.
However, cheaper boards might not last as long. Particle board is affordable but not as strong or stable as other options. Spending more on a better material can save you money over time.
Pro Tip: Compare prices and features of different boards. Paying a bit more can mean better strength and water resistance.
Ease of Installation
Picking a subfloor that’s easy to install is important. Some boards are simple to handle, while others take more time. If you’re doing the work yourself, choose a material that’s beginner-friendly. This can save you time and stress.
Plywood and OSB are lightweight and easy to cut. You can shape them to fit your space without special tools. They also come in standard sizes, making measuring and installing easier.
MGO boards and cement boards are heavier and harder to install. Cement boards need careful cutting and handling to avoid cracks. These boards are durable and water-resistant but take more effort to work with.
Here’s a quick comparison of some subfloor products and their features:
Product Name | Features | Price per Sheet |
---|---|---|
Diamond Premium Subflooring | Easy-fit tongue-and-groove edge, Down Pore drainage system | $53 |
Durastrand PointSix | Tapered edges to accommodate swelling, 50-year warranty | $37 |
Stabledge | Guaranteed to never swell, 50-year warranty | $55 |
LP Legacy | Rain channels for drainage, self-spacing edges | $40 |
LP TopNotch 350 | Notches for drainage, carbon-negative | $44 |
Tip: If you’re new to DIY, pick boards with tongue-and-groove edges. These snap together easily, saving time and effort.
Compatibility with Flooring Types
Not all subfloors work with every flooring type. Picking the right match keeps your floors stable and looking good.
Plywood and OSB work well with most flooring, like hardwood, laminate, and carpet. Their smooth surfaces make them a popular choice for many homes.
MGO boards are great for tile or vinyl floors. They resist moisture and stay stable, making them perfect for kitchens or bathrooms. Cement boards are also ideal for tiles. They stop tiles from cracking by providing a strong, flat base.
Particle board works best in low-traffic areas with carpet. It doesn’t handle heavy loads or moisture well, so avoid using it with hardwood or tile.
Here’s a table showing compatibility based on performance standards:
Standard Title | Description |
---|---|
F137-08(2024) | Flexibility of resilient flooring materials with cylindrical mandrel apparatus |
F1265-03a(2024) | Resistance to impact for resilient floor tile |
F1304-18(2024) | Deflection of resilient floor tile |
F693-01(2023) | Sealing seams of resilient sheet flooring products by use of liquid seam sealers |
F2659-23 | Moisture condition evaluation for concrete and other floor slabs |
Note: Always check the flooring manufacturer’s advice. This ensures your subfloor and flooring work well together.
Recommendations for Specific Scenarios

Bathrooms and Wet Areas
Bathrooms and wet areas need subfloors that handle water well. Moisture can ruin floors and make them wear out faster. Picking the right material is very important.
Here are some good choices for these spaces:
Plywood: Strong and affordable. It handles water better than OSB and works with most flooring types.
Cement Board: Very durable and waterproof. It’s great if you’re using tiles.
Fiber-Cement Panels: These boards resist moisture well, making them perfect for bathrooms.
For flooring, use hard materials like ceramic tile, stone, or vinyl. These hold up well in wet places. Avoid hardwood, laminate, bamboo, or cork. These can swell or warp when wet.
Tip: Add a waterproof layer under your subfloor. This protects it from leaks and saves money on repairs later.
Basements
Basements often have dampness or flooding, so choose water-resistant subfloors. Materials that fight water and mold work best here.
MGO Boards: These are great for basements. They resist water, mold, and fire, making them strong and safe.
Cement Board: Another solid choice. It stays strong in humid areas and works well with tiles or vinyl.
Plywood: If your basement is mostly dry, plywood can work. Seal it well to stop water damage.
For basement floors, vinyl or tile is a smart pick. Both resist water and are easy to clean. For warmth, add a moisture barrier and underlayment before installing flooring.
Note: Check for leaks or cracks in your basement first. Fixing these problems helps your subfloor last longer.
High-Traffic Areas
Busy areas like hallways, kitchens, or living rooms need strong subfloors. They should handle heavy use without breaking.
Plywood: A dependable option. It supports heavy furniture and lots of foot traffic.
MGO Boards: Even stronger than plywood. They resist impacts and stay stable, perfect for busy spaces.
OSB: A cheaper option for medium-traffic areas. It’s not as strong as plywood or MGO but works if you’re on a budget.
For flooring, hardwood or laminate adds style to high-traffic areas. Make sure your subfloor is strong enough to support these materials.
Pro Tip: Use tongue-and-groove boards in busy areas. They fit tightly, reducing movement and noise.
Budget-Friendly Projects
If you’re on a small budget, you can still find good subfloor materials. Focus on options that are durable but not too expensive.
Two affordable choices are OSB (Oriented Strand Board) and Plywood. OSB is the cheapest, costing about $16 for a 4 x 8 sheet. Plywood costs a bit more at $21 per sheet but is stronger and resists water better. Here’s a simple comparison:
Material | Cost per 4 x 8 Sheet |
---|---|
OSB | $16 |
Plywood | $21 |
OSB is great for areas with light or medium use, like closets or bedrooms. It’s easy to install and works well for DIY projects. But it doesn’t handle water well, so don’t use it in wet spaces.
Plywood is more flexible. It’s stronger and resists water better than OSB. This makes it a good choice for kitchens or living rooms. Spending a little more on plywood can save repair costs later.
Tip: Look for sales or discounts at hardware stores to save money. Buying in bulk can also reduce costs.
Eco-Friendly Options
If you care about the environment, there are subfloor materials that are eco-friendly. These materials are made from recycled or renewable resources, helping reduce waste.
MGO (Magnesium Oxide) boards are a great green choice. They’re made from natural minerals and don’t release harmful chemicals. They’re also strong and resist mold, fire, and water, making them long-lasting.
Another eco-friendly option is bamboo plywood. Bamboo grows quickly and is easy to regrow, making it renewable. It’s lightweight, strong, and works in most parts of your home.
Note: Look for certifications like FSC or GREENGUARD when buying eco-friendly materials. These labels show the product meets environmental standards.
By picking sustainable subfloor materials, you’re building a strong base and helping the planet too. 🌱
Picking the right subfloor depends on what you need. MGO boards are strong, water-resistant, and stable. They work well in wet or busy areas. Plywood is also a good option. It’s strong and affordable, great for spaces needing extra support.
Think about cost, durability, and how it fits your flooring. Match the subfloor to the room, like a bathroom, basement, or busy space. This helps your floors last longer and stay in good shape.
Tip: Spending more on a good subfloor now can save repair costs later and make your flooring last longer.
FAQ
What is the most durable subfloor material?
MGO (Magnesium Oxide) boards are the most durable. They resist water, mold, and fire, making them perfect for high-traffic or wet areas. If you want a subfloor that lasts for years, MGO is your best bet.
Tip: Use MGO boards in basements or bathrooms for extra durability.
Can I use OSB in a bathroom?
It’s not a great idea. OSB swells when exposed to water, which can weaken your floor. For bathrooms, choose water-resistant materials like plywood, cement board, or MGO boards.
Note: Always add a waterproof layer under your subfloor in wet areas.
What’s the cheapest subfloor option?
OSB is the most budget-friendly choice. It costs less than plywood and works well in dry, low-traffic areas. However, it’s not ideal for wet spaces or heavy loads.
Cost per 4×8 sheet:
OSB: $16
Plywood: $21
Can I install subflooring myself?
Yes, you can! Materials like plywood and OSB are lightweight and easy to cut, making them beginner-friendly. Look for tongue-and-groove boards—they snap together easily and save time.
Pro Tip: Use a circular saw for precise cuts and wear safety gear while working.
Which subfloor is best for eco-friendly homes?
MGO boards and bamboo plywood are excellent eco-friendly options. MGO boards are made from natural minerals, while bamboo plywood comes from renewable resources. Both are durable and sustainable.
🌱 Eco Tip: Look for FSC-certified products to ensure they meet environmental standards.