Hardie plank siding installation

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Old 08-31-18, 11:44 AM
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Hardie plank siding installation

we're looking to install hardie siding. there is existing wood type shiplap toungue/groove now no damage, in decent condition
this is in florida
can we place the hardie over the existing wood if so, adding a tyvek wrap would not be needed?
 
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Old 08-31-18, 11:47 AM
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let me add the existing is flat, no bumps or pop outs

also we want to install the hardie vertically.
 
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Old 08-31-18, 12:15 PM
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I suspect you're still going to want to install Tyvek, as it's both a water barrier and air barrier. Tyvek is cheap insurance. BUT, I would strongly suggest you call Tyvek and talk to tech support. You want to be sure that what you want to do isn't something that might void their warranty.
 
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Old 08-31-18, 02:15 PM
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What do you mean by vertically? Are you doing a board and batten or 4x8 panels or what? You always want a web directly behind the siding.
 
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Old 08-31-18, 03:34 PM
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Info

the hardie is 7.25 x 144. We are placing these vertically on the wall hopefully ober the existing siding.
Nothing under the current siding seems wet or damp and we’re in florida
 
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Old 08-31-18, 03:37 PM
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.

Not sure what you mean by webbing?
 
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Old 08-31-18, 03:53 PM
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That was autocorrect changing WRB to web.
 
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Old 08-31-18, 04:01 PM
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My neighbor said i shouldnt need a barrier wince the existing is in good shape and there should be protection under that
now i am not sure how true or accurate that is
 
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Old 08-31-18, 04:06 PM
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I would never do that. Your old siding becomes the sheathing, and the WRB goes between the sheathing and siding. If you don't mind that old siding rotting if and when it gets wet, listen to your neighbor.

Course I don't think I would install lap siding vertically either. Not without battens.
 
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Old 08-31-18, 04:40 PM
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Thank younfor the info!
inam defintely getting the tyvek now it just rained here can i install that over the existing if its alittle wet?
the battens my wife is not a big fan but i like them planned on caulking along all seams if thatvwould work
 
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Old 08-31-18, 04:54 PM
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Yes, housewrap can breathe.
 
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