It was pretty hairy putting this up and it included almost having the main beam dropping onto the solar panels. It will be a lot easier taking it down.
I spent Friday and today putting the insulation in for the floor. My first choice was wool from Oregon Shepard but they didn't reply to my inquiries. I ended up going with rock wool and here are my reasons:
- loose fill has a lower R-value per inch
- loose fill has to fluffed up
- fiberglass is itchy and has a slightly lower R-value
- rock wool is pretty dense and will probably resist settling and shifting
- rock wool is fairly water resistant
- rock wool was $220 vs fiberglass $130
My little spreadsheet to help my choice
Floor insulation | |||||
Cubic ft needed | 92 | ||||
ruxul loose | ruxal batt | FG loose | FG batt | Cellulose | |
Coverage/pkg in cubic feet | 22.49 | 18.24 | 56.63 | 35.89 | 18.12 |
Cost/pkg | 34.47 | 36.38 | 36.20 | 43.66 | 14.22 |
Weight/pkg | 33.00 | 42.10 | 30.00 | 29.90 | 25.35 |
R/inch | 2.82 | 4.00 | 2.70 | 3.64 | 3.33 |
Weight/cu ft (lbs) | 1.47 | 2.31 | 0.53 | 0.83 | 1.40 |
Cost/cu ft | 1.53 | 1.99 | 0.64 | 1.22 | 0.78 |
Cost/R | 0.045 | 0.042 | 0.020 | 0.028 | 0.020 |
Weight total (lbs) | 134.51 | 211.56 | 48.57 | 76.37 | 128.24 |
Bags needed | 5.00 | 6.00 | 2.00 | 3.00 | 6.00 |
Cost | 172.35 | 218.28 | 72.40 | 130.98 | 85.32 |
Now the fun part, installing it. I wore long sleeves, leather gloves and a mask. Rock wool is nowhere near as itchy as fiberglass and it washes off much easier. I found it would give slivers without the gloves. I've finished installing 3 1/2 bags out of five.
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