Wednesday, May 15, 2019

Attic insulation

Got the attic insulated today! Clint from Mitchell Insulation added about 14 inches of blown-in fiberglass insulation into my attic today. It had only an inch or two before. Looking forward to a cooler house this summer.

Update # 1 (2019)
The fiberglass blown-in insulation made a HUGE difference. Also had Brian Hinojosa out from Texan Air out to tune-up and clean the a/c, which is a new unit he installed when I moved in. The temp inside the house has remained about 20 degrees below par. Prior to the insulation the house would have been over 80 degrees at this time of summer. Now that the insulation has been added and lots of gaps sealed up, the inside temp has remained steady at 71-73 degrees.

Update # 2 (2020)
Something weird is going on. We live in a hot swamp called Houston where summer temperatures commonly reach 100° at 80% humidity. While the house is slightly cooler after post-insulation, the difference has not been quite as spectacular as my *fairly-extremely comprehensive research efforts indicated.

Yes, Mr. Holmes, we investigated this quizzical mystery. 
We discovered the attic is FRIGID COOL.  
Unlike the STICKY WARM interior living quarters.
The temperature is much more comfortable in the attic.

We troubleshooted:
      Is it an unconnected duct blowing cool air into the attic?

      Is it a leak in the air duct system?

      Is it anything else that a reasonably seasoned and knowledgeable homeowner should be able to identify?
          Apparently not. 

      So what is it????
            Beats me. Not a clue. 

So riddle me this:
Why—in a hot southern swamp—would a previously boiling attic become a freezer after blowing in one-metric-ton of insulation?

I have no answers. 
The internet—it seems—has no answers.
Or does it?


Update # 3 (2021)
After having the backup AC drip line started dripping. We leveled out the main line and that reduced the humidity in the house. 

If I were to go back in time, I wouldn't do blown-in fiberglass insulation. 
It's messy.
It's hard to breath up there. 
It's hard to move around in a cloud of fiberglass.
It gets everywhere.

Instead I'd do a radiant barrier + closed cell foam.

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