questions about mobile home subfloors - what a mobile home looks like under the subfloor

This week in our Ask a Mobile Home Expert series, we are covering questions about mobile home subfloors. Subfloors are an important subject in the mobile home world. Most every home with the standard OSB subflooring will need to have their subfloors replaced eventually.

OSB, or particle board, is a material made from small chips of wood that are glued and pressed together. It is a strong material but it soaks water up like a sponge. If you live in a manufactured home with OSB subfloor you will likely need to replace it eventually.

Before we continue, you may want to check out our step-by-step guide to replace flooring in a mobile home here.

4 Popular Questions about Mobile Home Subfloors 1 

Lowering a Raised Platform Kitchen Floor

I have a question, we have a 1967 Magnolia single wide, mobile home, 12’x 63′, with a front step up the kitchen. I would like to strip out the kitchen and lower the floor so it would be the same level as the rest of the house for our retirement years. Is a raised kitchen framed up on an existing sub floor so it could be removed?? I would really appreciate your help in this matter. We need new cupboards, appliances etc so would be a complete renovation.

Our 1978 Hommette single wide has the exact same step-up kitchen! I love it right now but I know it will be an issue as we age.

In our home, the platform kitchen is framed up (there’s a frame on top of the original floor joists). To lower our kitchen, we would need to remove the floor covering, the sub flooring, and then remove the additional framing for the platform. Once it is all removed, we can lay new subfloor down (assuming the bottom joists are healthy). Your home is probably the same way.

Without a doubt, this would be a large undertaking. However, if you are gutting the entire kitchen (cabinets and appliances) you could do it without too much of a hassle.


questions about mobile home subfloors - floor tile finished for stove installation


Installing Tile in a Manufactured Home 

We just purchased a 1999 24×48 double wide home and we plan to remodel the whole thing one room at a time. My question is that I want to put the “wood” look tile in the laundry, kitchen, and living room. What is your opinion on installing tile in a mobile home? The home will never be moved nor has it been moved since the original owner had it set on the acreage.

Tile is a great choice for many situations but there are a few things that should be considered.

First, it is not recommended to install tile across the marriage line of a double wide. Tile is a more permanent choice and can be a real burden if you have to remove it for any reason. Settling issues are another factor. Manufactured homes can settle over time which is why it is recommended to do a re-leveling check every 2-3 years. One side of the home can settle differently than the other and cause cracking.

Secondly, tile is a great addition to bathrooms but when installing tile in bathrooms or laundry areas it must be installed correctly with proper pans and liners. You want to protect the subfloor from water at all costs.

The material of your sub-flooring will play a big factor when deciding to install tile. The cheaper OSB sub-floor that is s0 notorious in manufactured housing is not a good foundation for tile. The material acts like a sponge and soaks up water quickly which will bow and warp the wood. Tile doesn’t do well on wet and warped wood. if you are laying tile you need to consider upgrading the subfloor to plywood that doesn’t soak up water so quickly.

questions about mobile home subfloors - mod manufactured home - subflooring installedl



Best Sub Flooring Material

I have water damage to my floors. I am in a 1995 single wide mobile home. The insulation is what came with it. I’ve read that I should keep the insulation below the wiring and pipes. Is this true? Or does heat get under the flooring from the heat duct? I’m tired of being cold!! What is the best subflooring to use?? Also, if the water has damaged the walls — how should I go about repairing them? states that as much as 25% of a home’s heat will be lost through the vents and floor. That’s a lot! It is recommended that you have your heat ducts and vents checked annually. You’ll want cracks and holes sealed with duct tape and that insulation be used under and around the ducts. This helps the heat that escapes from the heating vents to remain in the home.

One of our readers installed insulating foam board under their mobile home and was kind enough to give us a full step by step guide. You can read it here.

The most recommended subfloor material is 5/8″ plywood. If you can afford water resistant marine plywood for your kitchen, laundry, and bath that would be a good idea.

 Related: How to Replace Flooring in a Mobile Home 


questions about mobile home subfloors - laying new subfloors down in a mobile home

Step-by-step images provided Phillips Place Renovation, a blog that shares a couple’s gorgeous mobile home remodel. We featured the home here

Questions about Mobile Home SubFloors

What polyurethane coating would you recommend when painting a sub floor? 

Painting your subfloor is a good idea because it can help seal the cheaper OSB and protect it from water. There are a few things to keep in mind when painting your subfloor. First, you shouldn’t use water-based primers or paints. The standard OSB subfloor that is so common in mobile homes soaks up moisture. has a great list of all the best primers and paints for painting your mobile home’s subfloor. Suggestions include:

  • Sherwin-Williams ArmorSeal Enamel
  • Valspar Porch and Floor Enamel
  • Dutch Boy Latex Porch and Floor

Summary: Questions about Mobile Home Subfloors

A big thank you to all our readers that have asked questions about mobile home subfloors. If you have any questions please feel free to comment below and we will do our best to find your answer!

We hope you have enjoyed these questions about mobile home subfloors and our Ask a Mobile Home Expert series. As always, thanks so much for reading Mobile Home Living!

Disclosure: Any answers to questions posed and any recommendations or information provided herein should not be used as a substitute of an expert or any relevant professional that has inspected the issues in person.

Share on pinterest
Share on facebook
Share on twitter

Kim Alley

Kim Alley has written several articles for Mobile Home Living and has lived in a manufactured home for over 20 years.

14 thoughts on “4 Popular Questions about Mobile Home Subfloors”

    1. Hi Daniel,

      Maybe, if the doors can still open and close with that second layer and the initial subfloor are healthy you may be able to do that – I’d have someone check it out to make sure it can be done. If you do it, be sure to seal around the wood inside your vents (with mastic and the shiny aluminum tape). let me know how it works!

    1. Hi Deb,

      Chances are very slim that a homeowner can find a floor plan, construction plan, or schematics for their particular mobile or manufactured home model. Manuals usually don’t even have them as the manuals are usually based on size more than the actual model (single wide, double wide). You may luck up with a brochure or sales pamphlet on ebay or if someone uploads one somewhere. Sorry!

  1. We recently bought a lot with a 1992 Fleetwood double wide (40′ x 22′). We are in process of DIY renovating it.

    Having problems finding exact size replacement window 24″ x 52″ side by side making overall size of 48″ x 52″. Any suggestions?

  2. we have one spot, in mbile home, that is slightly , uneven, , but solid, , like bowed a little, , osb board, , has warped , a little there, is this a concern?, , while fixing floor sqeaks, by screwing the floor to joists, will it also help to level the subfloor a little, , , is there a way to level the subfloor there a little better, than god, pulling it up, that’s a major job, in , main bedroom, , , , , as stated, the floor is solid, but has , slight , hump, concern, ?, , , , pull carpet up , there, and , , compound, to relevel?, , its not the joists, , , even pulling carpet , up from a mobile home room , would be daughnting?
    unevenness, , not bowed, but slightly uneven, , can we use slightlylonger screws there to joists, will that help a little?, , or no?, slight unevenness, but , solid, , it did cause a few sqeaks, whih we will fix, , sqeaks, , any hope to , relevel, , ?, concern?, , solid, no bounce there at all, just , slightly uneven?

    1. Hi Ruth,

      You should get the warped MDF subfloor replaced as soon as possible but before you do that you need to find out what warped it and make sure that is repaired first. If the subfloor is warped by moisture then there is a big chance that the joists under it have gotten wet as well. If the issue has been fixed and the floor is now dry I don’t see any issue with trying to tighten it down. I’ve seen special screws at Lowe’s specifically for bowed subfloors so you may want to look into that. This is, of course, assuming there is a joist under the warp to screw into. If there isn’t it’s probably best to just cut the damage out and replace it.

      Best of luck!

  3. Hi Crystal,

    Again, thank you for a wonderful blogsite.

    In reference to insulation and subfloors, we have a 2003 Redman 24X48 DBLWide, and we’ve had to pull up some floors. When we installed our new hardwoods, we used underlayment before laying the hardwoods, which serves the same purpose as insulation. This underlayment covers any cracks in the seams and any gaps. So far, its worked great. As previously stated, replacing subfloors with plywood is always the best route. Avoid pressed wood all together (OMB). We’ve replaced sections with new plywood due to cost controls. Should anyone want to install new insulation, any local home improvement store will have the type and size you need. Hope this helps.

    1. Hi Stuart,

      The underlayment under the floors are a great help with squeaks and such but I don’t think it has a very good R-value? I’m not real sure about that though. All I really know about insulation is that you want the thick pink stuff under the subfloors and over the belly wrap, pretty much the same with foam insulation board.

      I bet your floors look great – hardwoods are gorgeous!

  4. I own a 2003 double wide embedded inground on concrete , We removed all carpets , since carpets collect dirt and dust, no matter how much you clean and vacuum them , Put down wood laminated flooring from Costco . easy to install . and tiled each bathroom Get pure delicious water from our well drilled down to 486 feet. The point I am trying to make is, those improvements were easily done . Your article gives the impression that adding to, or modifying a Mfg. Home is a big deal and hard work . No its not.

    1. Hi Liam,

      Glad you are remodeling and updating your home. We absolutely encourage DIY. However, I think you may be confusing subflooring and floor covering. Replacing subfloors in a mobile home IS a huge undertaking. You really need to have a good command of your tools as to not damage framing and understand the schematics of your home (especially venting, plumbing, and wiring). All while not damaging belly wraps or insulation and getting the right cuts. Laying tile and some floating flooring is a day in the park compared to subfloor replacements.

  5. Have to replace the subflooriing in my single wide trailer. Should I work on the walls first or floors first. Repairing holes and painting.

    1. Hi Tammy,

      Your floors are more important than your walls in most cases. It’s reduces heat loss and helps add structural security to the home (walls do too, of course). If you have water damage I’d def replace the floors first, after the leaks have been repaired.

      best of luck!

Leave a Reply

Your email address will not be published. Required fields are marked *

Dreamy Double Wide Porch
Double Wides

Dreamy Double Wide

Mobile Home Living’s newest featured home is a newer double wide with beautiful and creative handiwork inside and out . It is owned by Molly …

Read More →
Monster Inspired Mobile Home - Bedroom
Double Wides

Monster Inspired Mobile Home Decor

Dr. Frankenstein and his infamous monster would love this mobile home. The creator of this monster inspired mobile home took great care to combine Hollywood …

Read More →
37 Sequoia Cir, Santa Rosa, CA00003
Mobile Home Remodels

Can You Remove Walls in a Mobile Home?

One of the most popular questions we get in our Facebook group, Mobile Home Living: Remodels and Repairs are about removing walls in mobile homes. …

Read More →
Double Wides

This Completely Renovated Double Wide is Stunning

This time of year is prime buying and selling season for real estate. Luckily, you can find as many manufactured homes being sold through sites …

Read More →
Cedar Siding
Before and After Makeovers

Cedar Siding on Mobile Homes: Richard and Marie’s Whim

  Cedar siding on mobile homes is rare but it shouldn’t be! It takes guts to be different but luckily there are unique people that …

Read More →
Mobile Home Camper Fad Pink Camper
Campers and RVS

The Vintage Camper Fad is Awesome!

There’s a new fad that has hit the internet wide open. The masses have found out about our long held secret called…get ready for it……camping. …

Read More →