Tyvek And T1-11 Siding Question

Nov 16, 2006 2 Replies

Hi,



In the Spring, will be having new horiz. clapboard put up. Live in New England.



Presently, the house has T1-11 siding.



The contractor suggests putting the new horiz. clapboards right over the existing T1-11, which he will not take off, and also to have a layer of Tyvek between.



Two questions, please.



a. The T1-11, except for some holes, etc. is still pretty flat and in sort of "decent" shape.



Any caveats to putting the new siding directly over the T1-11 ? Anything to worry about if done this way, etc. ?



b. Was thinking a bit about the Tyvek.



Is this a good idea to have between the T1-11 and the new stuff ? Any chance of rot developing on the existing T1-11 by now having Tyvek over it ?



Anything I should also consider asking him, or worrying about, with this approach that I am not thinking of, perhaps ?



Any thoughts on all of this would be most appreciated.



Thanks, B.


tyvek descriptive answer at:

https://www.dup> Hi,

I don't think there is any problem putting tyveck over t-111. in this case think of the t-111 is functioning as the sheathing.

I would worry about keeping water out of the doors and windows. He should have a piece of drip flashing tucked behind the tyveck and directing water out over the window trim or brickmold of whatever.

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