Quote:
Originally Posted by cRiPpLe_rOoStEr
As construction methods in my country often differ a lot compared to what is done in the USA, Tyvek and similar materials are more often placed below the roof tiles, and it's still not much common. But anyway, besides preventing the moisture from being trapped inside, another matter of concern for me would be the air renewal, exhausting COČ too.
|
You would be impressed how much a home leaks air. They still build them 1970s style in Arkansas to this day. No code. no inspection. Code wise on energy standards i bet we are tied for last or in the running for last usa wise. Even Texas follows a pretty recent code but we don't lol. Its impressive how bad they are. But typically they are set up so badly they will typically have a blower door score of 7-12 air changes per hour. You can look into ACH50 and it will lead you down a rabbit hole. So they get plenty of fresh air exchanges above required through just air leaks (typically all wall penetrations and top and bottom plates as they don't seal up spec homes). Usually the only problem we might face in relation to indoor air quality is like he said above, dust and humidity from the outside will typically get inside your house and cause problems. Mostly just make your indoor air uncomfortable, make you run your air more, and probably slightly more allergies.
Interesting Aerohead. I know from my human senses that typically my attic in the summer is much warmer than 10 degrees over ambient ( i would honestly have to say probably more like 135 degrees actual temp). I am installing rafter vents though now and sealing up my top plates and electrical connections this week to get ready to update my insulation up top. Should help a lot with venting. When the vents aren't blowing the loose fill insulation out of place towards the center of the house, the insulation is usually blocking them. lol
Mold wise the house has been mold free for 17 years now so i guess we are good.
Water heater and central heating wise we are fully vented. Too inefficient to meet code to go ventless. Only sightly though.
Aerohead, what are your thoughts on stapling up infrared heat barrier to the 2x6's like they are doing on the new energy efficient builds? Gives a 6" air gap and is supposed to cut down a bit on energy transfer. Seems cheap enough.