Tiny House Sub-Floor Redo

Tiny House Sub-floor Re-do - Casey Friday

The Big Picture

It turns out that the plywood I purchased for the tiny house sub-floors was too thin.  It crackled under my weight, so I tore it off and replaced that 15/32″ crap with high quality 25/32″ (about 3/4″) plywood.

It’s now MUCH stronger, and it makes for a great foundation on our little tiny house!


  1. Use 3/4″ or bigger (25/32″ is what I used) plywood for your flooring!

Random Hi-Res Photo For You

Tiny House Sub-floor Re-do - Casey Friday

Oh Lordy, I Overdid It

Tiny House Walls Over-Engineered - Casey Friday

Tiny House Walls Over-Engineered - Casey Friday

I kind of went overkill with designing the walls.  I aligned the studs 12″ OC (on-center), which makes our Tiny House look a lot like a prison.  Hehe.  Also, in most Tiny House floor plans I’ve seen, they position wall studs 24″ OC.  I went double-time overkill.  Whoops.

So my goal tomorrow is to strategically remove all the unnecessary studs and get it to minimum required spec.

Squeaky Floor

I used 2 different types of plywood on the floor.  It happened due to a cutting mistake, but it was quite fortunate that it happened at all.  When I purchased the plywood, I thought any plywood would do.  We ended up getting 15/32″ plywood, which is definitely not thick enough for a floor.  It’ll work fine for the walls/ceiling, but not the floor.

The raised, middle section of the floor has some 3/4″ goodness, and it’s immediately noticeable when you step on it that it is substantially more stable than the rest of the floor.  It’s like night and day difference.

So, although it’s going to suck, I’m going to unscrew and pry up the front and rear sections of flooring.  I will then re-cut new 3/4″ plywood sheets to fit and place them where the old sheets once were (after sanding the Liquid Nails glue off).  It seems like a lot of work and a waste, but I’d much rather have solid floors and fix this now than to be unhappy with walking in our house all day long.


  1. Use 3/4″ thickness plywood for the floor in your tiny house!
  2. Position your wall studs 16″ OC (on-center) or even 24″ OC – nothing closer than that.  It’s just more weight and unnecessary.

Last 3D Tiny House Model Before Walls ‘Go Up’

Tiny House Design Front - Casey Friday

I’ve put together one final 3D draft of the Tiny House before I ‘build’ the wall frames in SketchUp.  We finally finally ordered our windows and door today, so I now have rough measurements to design around for the wall joists.  I’m not entirely comfortable with how to install windows yet (based on the few internet tutorials I’ve read), but with a bit more reading, I’ll know how to design the wall frame around the windows.

By the way, the windows and door we picked out are absolutely fantastic, and I haven’t seen a Tiny House to date that looks how ours will look.  It’s seriously going to blow your minds, folks.

Tiny House Design Front - Casey Friday

Tiny House Design Back - Casey Friday

[box type=”info” style=”rounded” border=”full”]PS – Those sexy Sketchup models are the same height as me and Jessica. Now you have an idea of what sort of space we’ll have in the house![/box]

Our Tiny House Floor Is Done

Tiny House Middle Subfloor Closed In - Casey Friday

OMG!  The floor is done!  The last time I showed you pictures of the Tiny House, I had only recently finished drilling holes through steel.  Now though, I am happy to say that I’m done with what will probably end up being justified as some of the hardest work on the Tiny House.

[box type=”info” style=”rounded” border=”full”]This thing is a lot harder to build than I initially thought; but that doesn’t mean I won’t have fun doing it![/box]


Don’t worry, I did insulate that final slat in the middle section that lies right in front of the porch area.  It’s all good!


  1. Using Liquid Nails to seal the plywood flooring to the floor frame is incredibly important.  It seals everything up so that the insulation can actually do its job.
  2. Make sure you place the plywood flooring grain perpendicular to the floor joist beams, as it will add strength to the floor.
  3. It doesn’t all have to be perfect.

It’s All Coming Together Now

Tiny House Sketchup Design - The Rich Life - Casey Friday

Tiny House Sketchup Design - The Rich Life - Casey Friday

We’ve made decisions on all the windows and the doors, and we’ll be buying them tomorrow.  They’ll take a couple weeks to be delivered from Lowe’s, but I’ll have plenty to keep me busy until then.

I’ll be updating the SketchUp drawing to finish up the wall studs, then I will

  1. plan all of my wall stud cuts
  2. buy the lumber
  3. cut the lumber
  4. build the walls!

We’re still waiting on the insulation (OMG Home Depot – get it together!), and I’ll also be buying new 2×10 slats for the raised middle section.  We’ve gotten quite a bit of rain here, and the middle boards have become quite warped, so I’ll be replacing those with new straighter 2×10 beams and using the old beams as bracing between the new ones.

When the insulation gets delivered, it will be installed, plywood will be glued and drilled down, and the floor will be officially done!

Updated Tiny House Model

This is requiring a bit more thoughtful engineering that I first thought it would take; but the good news is that this Tiny House will be over-engineered to the max.  A meeting with my BFF K Allen M led to a discovery of how to build the floor and walls with no leakage.

I’m learning quite a few things that I’ll do right (from the start) on the next tiny house I build, but this is nonetheless a crazy fun build, and I’m pretty sure I’m addicted to Google (Trimble) Sketchup.  Here’s the progress up until today.

Tiny House Mockup in Sketchup - Casey Friday