Hello all! Been reading a bit, trying to learn as much as I can, and hope to be starting to make actual plans soon.
Do not plan to build for 2-3 years, but have recently acquired property (electric at the road, no water yet) and hope to start laying out foundational work for the whole project soon, like getting electric ran to the back, a shop build for storage and working out of, figuring out water (well or long tie to water district), driveways back into the property, etc.
I am sure I will leave out some info, but to get started:
Climate Zone 3, North Texas.
Tornado concern, but not top priority
Rural, on acreage, no building restrictions.
Due to some personal and medical issues, my priorities for the build start with *Quiet*, followed by comfort/ efficiency.
To this end I have been leaning hard toward ICF, but if I should be considering something else, please let me know.
This leads to the first set of questions: I am inherently an "if this is good, overkill is more good, and massive overkill seems better yet".
I have seen a buildingscience paper that says in zone 3 I need R20 walls, but also information that ICF loses much of its thermal mass benefits when there are not wider swings below desired interior temps, and with much of our summers seeing 75+ for overnight temps, and 95-105 highs, I understand the reasoning behind this.
So do I need/see a real benefit of bumping the insulation up a bunch, or will a true Rvalue around 22-23 for the wall keep me happy and comfortable for years to come? I do plan to stick with 6" thick concrete, so considering 8" block with inserts, added foam on the outside, specialty blocks, etc.
I am also torn about roof systems. I plan on a steel roof, and again *quiet*/noise abatement is a priority, but I am not sure that a concrete poured roof is the best option. Am I crazy, or should I consider a more traditional roof with lots of insulation and just a poured concrete roof over part of the master suite/the interior room for the "safe room" in the design?
Lastly (for the initial learning, lol) - is there a rough estimator for AC use by square or cubic feet with an ICF house in climate zones 2 or 3? With our high humidity I am looking into an in-line dehumidifier, but am curious about the need for that along with sizing for the AC. We are currently looking at 2200-2700 sq ft houses as we narrow things down. They will be in in a shaded area, with trees to the north, east, a little ways away on the south and west sides. Because of this we are looking for houses with large porches for the overhang (front toward west) combined with trees in the front yard. |