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Skids 03-14-2008 04:54 PM

Siding
 
I am planning to put certain teed shakes all around the house. I have one contractor that will install the foam board all around and another that suggests to put ty-vex all around without the foam board. Which way should it be?????

oldfrt 03-14-2008 06:24 PM

It could be either way.

While the foam board(depending on the thickness) will offer extra insulation value,the Tyvek is designed to cut down on wind penetration through cracks in plywood.

If this siding is going over the sheathing and you have sufficient insulation in your wall cavities(2x6 construction with R19)then the tyvek would be better.
If you are going over existing siding,than the foam board can be used as a leveling system for the new siding.

hmbuilder 03-14-2008 08:35 PM

i would worry about the foam board especialy if it is clad with alluminum. the foam board tends to condensate on the side against the home. i would go with just tyvek. the insulation value of foam board ist woth the cost also. if the walls a properly insulated the foam board wont do much, just remember you loose the most heat through the windows, doors, and underinsulated attic.


chris

http://www.homebuildingclinic.com

USP45 03-14-2008 09:05 PM

We use foam boards when there is such an uneaveness in the old siding that installing the new would look terrible. We install the foam board and now we have a nice flat surface.

Not only does Tyvek stop air from comming in, it allows the house to breath, sort of a one way vapor barrior, lets moisture out, but not in

Skids 03-15-2008 08:25 PM

siding
 
Thank you all for the reply. I feel much better about my contractor..

Happy building,
Skids


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