Replies

1. 
   walta100 | Jul 12, 2021 09:33pm | #1

   In my opinion there is no good reason to plan a conditioned attic. The only reason to condition an attic is that someone made the poor choice to install the HVAC in the attic since you are still planning say NO. When you build a house lot of dumb ideas will end up in front of you and it is your job to be strong and say NO.

   The way I see it if you see spray foam on a set of plans it is a big red flag pointing to a quick and easy fix put there by someone with little or no regard for how your money gets spent.

   A conditioned attic has twice the surface area and is mostly spray foam the most expensive Rs you can buy so to stay on budget you end up with an R3o for 4X the price of an R60 ceiling.

   I do not think there is a code approved semi-conditioned attic. Vented is best and a conditioned attic is approved but in between is a recipe for mold and rot.

   Walt

2. 
   art_kiwacz | Jul 12, 2021 09:48pm | #2

   Thank you Walter, this helps. Spray foam is a big no based on prior experience. House will have 2 furnaces, so will try to make the second floor unit use in-floor ductwork. Will probably need floor trusses with opening for ductwork which will be expensive but will eliminate soffits.