Sheathing

07-17-2011, 03:25 AM	#1
Hrose77 Newbie   Join Date: Apr 2011 Posts: 25	Sheathing When I install the plywood sheathing do I put it right on the foundation or is it flush with the sill plate?

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07-18-2011, 01:54 AM	#2
jklingel Member   Join Date: Dec 2008 Location: Fairbanks, AK Posts: 1,747	Sheathing Try not to contact concrete w/ wood, if untreated. Whatever you do, make sure you air seal either inside, outside, or both; that means caulking, EPDM gaskets, and/or taping (use non-hardening materials).

07-18-2011, 07:07 AM	#3
Ron6519 Member   Join Date: Mar 2007 Location: Long Island, NY Posts: 9,519	Sheathing Quote: Originally Posted by Hrose77 When I install the plywood sheathing do I put it right on the foundation or is it flush with the sill plate? The sill plate and rim joist should be in the same plane as the foundation edge. The plywood should extend down past the sill plate ( by an inch or so) to cover the sill plate concrete connection. __________________ Ron "They that can give up essential liberty to obtain a little temporary safety deserve neither liberty nor safety." B. Franklin 1759

07-18-2011, 10:49 AM	#4
Hrose77 Newbie   Join Date: Apr 2011 Posts: 25	Sheathing I'm I'm extending down past the sill plate then do use a pressure treated strip so avoid rot?

07-18-2011, 11:21 AM	#5
DangerMouse the Musigician     Join Date: Jul 2008 Location: I'm right here! Posts: 10,404	Sheathing If the plywood is in contact with the concrete or ground, be sure it's not "just" pressure treated, but pressure treated FOR ground contact! There IS a difference and inspectors can fail you if the proper material is not used and you will have to do it all again. DM __________________ [SIGPIC][/SIGPIC]Click To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts. to see some of my original magic tricks and trick boxes!

07-18-2011, 12:41 PM	#6
jklingel Member   Join Date: Dec 2008 Location: Fairbanks, AK Posts: 1,747	Sheathing Quote: Originally Posted by Ron6519 The sill plate and rim joist should be in the same plane as the foundation edge. The plywood should extend down past the sill plate ( by an inch or so) to cover the sill plate concrete connection. Ron: What is the need to extend the plywood if you have an EPDM gasket under the sill plate?

07-18-2011, 04:52 PM	#7
Ron6519 Member   Join Date: Mar 2007 Location: Long Island, NY Posts: 9,519	Sheathing Quote: Originally Posted by jklingel Ron: What is the need to extend the plywood if you have an EPDM gasket under the sill plate? It keeps wind driven rain from getting through. The poured foundations are sometimes a little wavier then the sill seal thickness. This allows air infiltration as well as water. It also looks neater. __________________ Ron "They that can give up essential liberty to obtain a little temporary safety deserve neither liberty nor safety." B. Franklin 1759

07-21-2011, 04:35 PM	#8
Gary in WA Moderator   Join Date: Mar 2009 Posts: 8,792	Sheathing Add a metal flashing under the sheathing as any contact with the concrete (moisture reservoir) wall could wick to the wood. Bad enough the p.t. mudsill contacts the sheathing without a capillary break; http://www.greenbuildingadvisor.com/...-building-code Remember, #5; http://publicecodes.citation.com/ico...9_3_sec017.htm Gary __________________ Clothes taking longer to dry? Clean the dryer screen in HOT water if using fabric softener sheets. They leave a residue that impedes air-flow, costing you money. Clean the ducting in the last six months? 17,000 dryer fires annually!