[ShariH]

I have a contractor currently replacing our cardboard (practically) siding with Hardiplank. He is intalling the new siding directly to the studs after attaching the Dupont barrier.

Should there also be plywood or some other supportive barrier? We live near Houston, Texas so heat, humidity and critters are a concern.

Thanks in advance!

Blessings!

Shari

 

[RickyBobby]

I can only speak for my northeast experience, but all siding I have ever installed, including Hardiplank, has been over exterior sheathing. I would not want the plank to span the stud cavities without something solid behind it. That stuff is way too flexible IMO to do that.

Not sure what the mfg instructions state, but seems to me that there should be some backer for installation. One of the pro siders should be along to help you out better.

 

[rossfingal]

Do not install the siding directly over the studs!!!!!!!
Any siding!

rossfingal

 

[rossfingal]

Check the manufacturer's instructions/warranty info -
It may invalidate the warranty!
(Some type of "house-wrap" is required)

Regards!

rosfingal

 

[fulton 22175]

siding over sheathing with barrier , how else are the critters supposed to stay out they can eat thru anything

 

[rossfingal]

Yeah, see "critters" (squirrels) eat through .024 aluminum!
(If I hadn't seen it - I would not have believed it!)

rossfingal

 

[rjniles]

The sheathing provides structural integrity to the building. It prevent racking and ties all the framing together (the bottom plate to the studs and the studs to the top plate). Stop the job and get the building inspector involved it the contractor is a jerk.

 

[kwikfishron]

Although I strongly disagree with installing Hardi without sheathing but the manufacture allows it.

http://www.jameshardie.com/pdf/install/hardieplank-hz5.pdf

 

[Joe Carola]

I have a contractor currently replacing our cardboard (practically) siding with Hardiplank. He is intalling the new siding directly to the studs after attaching the Dupont barrier.

Should there also be plywood or some other supportive barrier? We live near Houston, Texas so heat, humidity and critters are a concern.

Thanks in advance!

Blessings!

Shari

This has to be a joke. Unless it's a shed.

 

[Gary in WA]

Fig.301.2(4), halfway down the page.
Appears you are in the 120-130 mph wind Zone here; http://publicecodes.citation.com/icod/irc/2009/icod_irc_2009_3_sec001_par004.htm

You should at least be building to this; http://www.awc.org/pdf/WFCM_90-B-Guide.pdf

The existing (hopefully) let-in braces are far to weak for your area, though may be acceptable for local Code, ask your Building Department. http://bct.nrc.umass.edu/index.php/publications/by-title/insulating-on-the-outside/

Perhaps there was shiny cardboard under the siding- called Thermo-ply- it is structural, I stopped installing that in the ‘80’s; http://www.berryplasticsbpg.com/products.aspx?page=thermo-ply

And, welcome to the forum!

Gary