This part took quite a long time, it was very fun but it was something I didnt want to rush.  There are endless possibilities when youre looking at an empty shell trying to make sure youre going to set it up exactly the way you want it.  Remember, think 10 steps ahead, itll save you some serious headaches and things will turn out the way you want them to. 

With limited space, you arent going to want to use a traditional water heater with a tank.  I took my time researching tankless water heaters and went with a Precision Temp NSP-550.  It doesnt have a pilot light so it only uses propane when youre using your hot water.  It runs off of 12 volts, so I had to get a little DC converter to plug into my 110 electrical system.  If the water heater senses water temperature under 40 degrees it kicks on the heating element to make sure none of the innards of the water heater are damaged due to freezing water.  Im very happy with this little guy, you turn the water on and the 55,000 BTUs heat the water with ease.  Id reccomend this bad boy and I would deffinitly use this again. 

With limited space, you arent going to want to use a traditional water heater with a tank.  I took my time researching tankless water heaters and went with a Precision Temp NSP-550.  It doesnt have a pilot light so it only uses propane when youre using your hot water.  It runs off of 12 volts, so I had to get a little DC converter to plug into my 110 electrical system.  If the water heater senses water temperature under 40 degrees it kicks on the heating element to make sure none of the innards of the water heater are damaged due to freezing water.  Im very happy with this little guy, you turn the water on and the 55,000 BTUs heat the water with ease.  Id reccomend this bad boy and I would deffinitly use this again. 

I used PEX lines throughout the entire house because it was easy and is far more resistant to damage in case the pipes do freeze.  The only thing I would have done different is put the lines at an even steeper angle toward my drains.  The house is easy to drain but there are some low points that trap some water, so I need to use an air compressor to blow all the water out if I winterize it.  

I used PEX lines throughout the entire house because it was easy and is far more resistant to damage in case the pipes do freeze.  The only thing I would have done different is put the lines at an even steeper angle toward my drains.  The house is easy to drain but there are some low points that trap some water, so I need to use an air compressor to blow all the water out if I winterize it.  

I ended up going with a 110 volt system for the house, that way everything functions as a normal home.  I didnt run any 220 in the house because my larger appliances run off of propane, wanted the appliances to pull a light load so I wouldnt put strain on the solar system.  I installed all the boxes and drilled all the holes for the wires, anything to offset the price of the electrical install.  The only thing I hired out was was the electrical system, it was one thing I didnt want to have to do is trouble shoot a faulty electrical system once the walls were up.  It was well worth it, everything works perfectly in the house.  Its very similar to an RV, I tie my 50 amp cable directly into a power source and that hooks into a 65 amp breaker.  

I ended up going with a 110 volt system for the house, that way everything functions as a normal home.  I didnt run any 220 in the house because my larger appliances run off of propane, wanted the appliances to pull a light load so I wouldnt put strain on the solar system.  I installed all the boxes and drilled all the holes for the wires, anything to offset the price of the electrical install.  The only thing I hired out was was the electrical system, it was one thing I didnt want to have to do is trouble shoot a faulty electrical system once the walls were up.  It was well worth it, everything works perfectly in the house.  Its very similar to an RV, I tie my 50 amp cable directly into a power source and that hooks into a 65 amp breaker.  

Went with some pretty stout mounting brackets for the stairs, I wanted the stairs to be effective as storage and very stable stairs.  All said and done the stairs doubled as a bracket that made the structure more ridged.  Like I said, plan 10 steps ahead.  I used a lot of grid paper to write everything down with my build so when all of this was covered up with siding I know exactly where the studs were. 

Went with some pretty stout mounting brackets for the stairs, I wanted the stairs to be effective as storage and very stable stairs.  All said and done the stairs doubled as a bracket that made the structure more ridged.  Like I said, plan 10 steps ahead.  I used a lot of grid paper to write everything down with my build so when all of this was covered up with siding I know exactly where the studs were. 

Again, nice solid brackets for the couch and the stairs going into the lounge area.  You lose a little insulation but I haven't noticed any cold spots. 

Again, nice solid brackets for the couch and the stairs going into the lounge area.  You lose a little insulation but I haven't noticed any cold spots. 

Decent ventilation system for the bathroom to help get rid of moisture while showering, and to get rid of whatever other stank the bathroom produces. 

Decent ventilation system for the bathroom to help get rid of moisture while showering, and to get rid of whatever other stank the bathroom produces. 

Getting the windows prepped for the spray foam. 

Getting the windows prepped for the spray foam. 

I used a do it yourself spray foam kit from foamitgreen.com that worked fairly well, it was straight forward and didnt take much time.  Tried heating the house as much as we could before we sprayed it but still wasnt able to obtain the expansion I was looking for.  Still, after it was all said and done the house is very warm and I don't have any complaints. 

I used a do it yourself spray foam kit from foamitgreen.com that worked fairly well, it was straight forward and didnt take much time.  Tried heating the house as much as we could before we sprayed it but still wasnt able to obtain the expansion I was looking for.  Still, after it was all said and done the house is very warm and I don't have any complaints. 

The cost of this spray foam is a little outrageous, it does provide an airtight seal and adds to the rigidity of the structure but I don't know if I would go this route again.  I think you could obtain the same amount of tightness (insulation term) by using polystyrene sheets and spray foam to fill in the gaps.  The one perk to the spray foam is it was fast and easy to trim up.  The down side is that it is expensive and sensitive to temperature during application.  I sprayed the house in January here in Wyoming, wish I could have planned it better but it just didn't work out that way.  Lessons learned. 

The cost of this spray foam is a little outrageous, it does provide an airtight seal and adds to the rigidity of the structure but I don't know if I would go this route again.  I think you could obtain the same amount of tightness (insulation term) by using polystyrene sheets and spray foam to fill in the gaps.  The one perk to the spray foam is it was fast and easy to trim up.  The down side is that it is expensive and sensitive to temperature during application.  I sprayed the house in January here in Wyoming, wish I could have planned it better but it just didn't work out that way.  Lessons learned. 

December 2016 marks the second winter the house has survived and Im happy to say that I haven't had any issues with freezing water lines and the inside of the house stays toasty warm.  

December 2016 marks the second winter the house has survived and Im happy to say that I haven't had any issues with freezing water lines and the inside of the house stays toasty warm.