I have framed my house in climate zone 6 and now planing for my exterior insulation/ rain screen/ and cladding choices. So far this is my assembly from inside out.
2×6 wood studs 16″ oc
Stud cavity insulated with damp spray cellulose
1/2″ osb sheathing w/ taped seams
Tyvek house wrap
The windows are installed as outie windows and their bucks sit 2 3/4″ proud of the sheathing
I have also purchased enough 2″ Rockwool Comfortboard 80 to cover the exterior.
My original plan was to put vertical 1×4 furring over the rockwool to create my rainscreen and side with LP Smartside Lap Siding.
(** Side note – I posted another question about this assembly back in December and Michael Maines alluded to the fact that lp required 2×4 furring over mineral wool. I thought I found a work around by using 3/4″ southern yellow pine as stated in LP’s technical note 18. However, after more research recently, that is only acceptable over “rigid foam insulation” and does not allow 1×4 over mineral wool insulation. Thanks Michael, I should have listened to you sooner.)
Now my beautiful bride wants the look of board and batten for our house. I have read as much as I can about rainscreens (mostly on this site). So I looked into horizontal rainscreens. There have been some comments asking about running the rainscreen diagonally to allow for vertical siding while still having the benifits of vertical rainscreen. So here are my questions and remember i must achieve 2 3/4″ thickness for insulation and rainscreen for my windows and doors.
1. Does anyone have any good information on running a rainscreen diagonally?
2. If running the rainscreen horizontally is there a fastening schedule for going over 2″ of mineral wool? (all fastening schedules I have found for rainscreens over insulation have them running vertically)
3. Is there any way to detail this in which lp would approve of or do I need to find another cladding?
4. Is there any product other than wood that is 3/4″ thick that I could use?
Thank you in advance for your help,
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