Steve Baczek and Jake Brutton | November 06, 2018


details // Concrete & Masonry, Framing, Insulation & Air Sealing

Animation: Floating Insulated Subfloor on a Slabless Slab

 

Wait, what? 

 

Insulating on top of a slab is a fast way to warm up a slab-on-grade concrete floor. In the case of a house in central Missouri, it is also a way to eliminate the concrete slab from the equation.

A slabless slab may sound far-fetched, but peeling back the layers, we can see that the assembly begins with compacted base over undisturbed ground. 

 

Step by step:

  • On top of that sits four inches of crushed gravel, which replaces the slab.
  • On the gravel goes a sheet of 10-mil plastic with the edges folded up and sealed to the mudsills. 
  • Seams are overlapped six inches and taped.
  • Over the plastic goes rigid insulation with sufficient compressive strength.
  • Along the bottom of the wall, a ½ inch sub-base is placed so the spray foam installers can get a continuous air seal at the inside connection.
  • The first layer of subflooring is laid without fasteners.
  • The second layer is glued and screwed perpendicular to the first layer.  
  • The edges of the sheets are kept about ¼ inch from the walls to allow for movement in the future.

Exterior insulated sheathing makes this an airtight, thermally isolated, water-tight subfloor that is rock solid over a slabless slab that is not far-fetched. 

 

—This detail comes from the drawing board of Steve Baczek in Reading MA and the jobsite of Jake Brutton, Aarow Building in Columbia, MO (climate zone 4/5)

 

Comments

I appreciate your sharing, the information is great and rewarding.

asianfanfics

This is one of the main site which you can use in any kind of related issues because once you approach cheap essay writing service for these type of work then it will be easy for us to understand all the work and can implement all the work easily, Also when you give us such an informative news then it will be more easy for us to tackle all the hurdles with our best experts team.

 

Add new comment