siding over T1-11

Reply

  #1  
Old 09-11-07, 11:18 PM
J
Jst
Jst is offline
Member
Thread Starter
Join Date: Dec 2000
Location: usa
Posts: 99
Received 0 Votes on 0 Posts
siding over T1-11

I've read the forums and learned that it's OK to side over T1-11 but questions remain...

I'm debating on HardiePanel vs. vinyl.

My house apparantly has no plywood sheathing, just 1 inch foamboard over the studs, and T1-11 over the foamboard.

1. Can either Hardie or vinyl still be nailed to the T1-11? or do the nails need to penetrate the studs in this situation?

2. T1-11 rotten in spots. Replace before siding with more T1-11 or OSB?

3. I think mice are gaining entrance to the house by burrowing into foamboard near the ground where the siding/foamboard stops.
What can I do here to 'seal' off this area. Probably some kind of metal flashing?...is there a commercial product for this purpose? Previous owners used aluminum gutter guard mesh and nailed it to the siding--looks like crap and doesn't work.

Thanks much,
Jst
 
Sponsored Links
  #2  
Old 09-12-07, 05:14 PM
XSleeper's Avatar
Group Moderator
Join Date: Dec 2004
Location: USA
Posts: 25,987
Received 666 Votes on 616 Posts
1). Hardie's instructions allow their lap siding to be blind nailed to a minimum of 7/16 OSB, provided you nail 12" OC, with the correct sized nail that they recommend. Vinyl siding is quite similar, although you probably won't find any official manufacturer's recommendation in that regard. So yes, you could probably install it right over your T1-11, provided it is all still nailed tightly to the studs and is not loose. You MUST install building paper over the existing siding, as per Hardie's instructions. Don't forget to consider what affect the added siding thickness (roughly 3/4" if using hardiplank) will have on your window trim, and especially your window sills. Window sills MUST stick out past the siding to provide a drip edge over the siding.

2). Depends how rotten you are talking about. If it's punky and raised, you might be able to get away with chipping the loose material off, belt sanding it flat if necessary, then covering it up with Tyvek. If it stays dry, it should not get any worse.

3). Not sure if there's anything premade that will work, but I'd suggest that you take prepainted aluminum trim coil (or vinyl coil such as Pro-Trim) and make your own flashing to cover the bottom edge of the foam. It doesn't need to be anything more than an "L". After you figure how much flashing you need, you could buy the coil, cut some lengths, rent a metal break, bend it up, and get the break back to the rental store in a matter of hours. Heck, you could probably even do it in their parking lot if you want to save time hauling it.
 
  #3  
Old 09-12-07, 11:21 PM
J
Jst
Jst is offline
Member
Thread Starter
Join Date: Dec 2000
Location: usa
Posts: 99
Received 0 Votes on 0 Posts
Thanks Xsleeper

The T1-11 is pretty bad in some spots-- I kicked it and a piece the size of my foot fell off exposing the foamboard. More would easily come off if I tried (probably just by looking at it). Would OSB be a better choice to replace--is it more weather resistant than plywood?

How would the L-shaped piece fasten onto the house. The vertical side would touch the brick-textured concrete foundation. Caulk? If so what kind?

Thanks again.
 
  #4  
Old 09-13-07, 04:44 AM
XSleeper's Avatar
Group Moderator
Join Date: Dec 2004
Location: USA
Posts: 25,987
Received 666 Votes on 616 Posts
OSB is, IMO, less moisture resistant than plywood. Either would work fine to patch rotton areas, though. Like we discussed, it should not get wet again, provided nothing gets behind your housewrap.

If the L is long enough, the vertical flange will attach to the bottom edge of the siding, and it would be nailed to the siding. It would not need to be attached on the bottom horizontal edge, but if you wanted to seal it there probably wouldn't be anything wrong with that. Only problem would be if water got in, it would be trapped inside that flashing. Leaving it uncaulked would allow any water to escape. But again, if the housewrap overlaps your flashing, it should be a moot point.
 
Reply
Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Thread Tools
Search this Thread
 
Ask a Question
Question Title:
Description:
Your question will be posted in: