thompson
Registered Users
Posts:3
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| 08/05/2008 1:17 PM |
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Hello,
I am considering Hardie lap siding over my SIP walls.
I've been told by a Hardie rep that the 50 year warranty isn't valid on SIP walls unless the siding is face nailed as well as the blind nailing.
Now we all know that this will look like crap. So what can be done? Any experience?
I am considering applying furring strips, osb or plywood, @ 12" o.c. to not only provide an additional nail base, but also a good drainage layer in front of the housewrap.
Thanks in advance for the wealth of information provided on this forum. |
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rnortman
Registered Users
Posts:94
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| 08/05/2008 3:54 PM |
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Posted By thompson on 08/05/2008 1:17 PM
Hello,
I am considering Hardie lap siding over my SIP walls.
I've been told by a Hardie rep that the 50 year warranty isn't valid on SIP walls unless the siding is face nailed as well as the blind nailing.
Now we all know that this will look like crap. So what can be done? Any experience?
I am considering applying furring strips, osb or plywood, @ 12" o.c. to not only provide an additional nail base, but also a good drainage layer in front of the housewrap.
Thanks in advance for the wealth of information provided on this forum.
I don't have specific experience with Hardie siding, but a drainage plane is a good idea in any case. Make it ventilated top and bottom. There's a product called Cor-a-Vent for that purpose. (They mostly sell ridge vents for roofs, but they have a siding system too.) The primary advantage is that it keeps bugs and debris out of the drainage space.
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AUSTENNN
Registered Users
Posts:13
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| 08/05/2008 7:54 PM |
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| I once went to the Hardie site and I think I confirmed what you are saying as I too wanted the same exterior look. I moved on to stucco. |
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The Smiths
Registered Users
Posts:4
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| 08/06/2008 9:38 PM |
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| CertainTeed makes a fiber cement siding product that is covered by warranty using blind nailing. We had the same concerns with Hardie and this product seems like a real good alternative. |
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AUSTENNN
Registered Users
Posts:13
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| 08/07/2008 10:07 AM |
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Remember: You will be fastening WeatherBoards Siding to the studs, not the sheathing. You can use either nails or screws.
The above is from the Certainteed installation manual. Seems there is no Studs with SIPs so I don't t think this will work |
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tapper
Registered Users
Posts:8
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AUSTENNN
Registered Users
Posts:13
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| 08/10/2008 6:15 PM |
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| If you go with screws the it gives you 50lbs of lifft. How does that stack up? (comparable to what wind speed) . It seems like a lot but is it? I may change my mind on the stucco. |
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Louie FischerSIPs
Registered Users
Posts:10
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| 08/13/2008 2:58 PM |
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Thompson,
I was curious about your question myself. I got on Hardie's website and it said you must install the siding to their installation instructions in order to not void the warranty. I went to the installation instructions and the first line says you can install to wood or metal studs "or" sheating no less than 7/16" thickness. I don't see why this would void the warranty. I think your supplier may not know much about SIPs and is so used to stud frame. The drainage plain has to be a good idea also. |
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thompson
Registered Users
Posts:3
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| 08/14/2008 12:32 PM |
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Here's the problem
*"only nailed to sheathing, plank can be a maximum 9-1/4” wide and must be face nailed at 12”o.c. with 0.09”
shank x 0.221“ HD x 1.5” long corrosion resistant nails"
So they have to be face nailed. Again, I think that will look like crap compared with blind nailing, not to mention more labor intensive to cover up. |
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cmkavala
Registered Users
Posts:807
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| 08/14/2008 1:30 PM |
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| Nails won't hold in sheathing...... blind screw instead |
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Chris Kavala
chris@southernsips.com
1-877-321-SIPS |
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Louie FischerSIPs
Registered Users
Posts:10
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| 08/14/2008 1:54 PM |
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The screw idea has to be good. The lifting plates for an 8x24 OSB panel can lift the 800lb. panel screwed to one skin with about 20 1 1/4" wood screws (Picture Below). I know this doesn't help your warranty issue but as was mentioned, Certainteed has a specification for screwing into SIPs.
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cmkavala
Registered Users
Posts:807
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| 08/14/2008 1:59 PM |
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| I point it out beacuse the Hardie instructions don't say you can't screw it to the sheathing, they only mention nails |
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Chris Kavala
chris@southernsips.com
1-877-321-SIPS |
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bkcoburn
Registered Users
Posts:2
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| 08/15/2008 6:57 PM |
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| I encountered the same issue with Hardiplank and my SIPS. Builders in my area had discovered that hardiplank could be reliably fastened to OSB SIP skins using a roofing coil nailer, blind nailing at 8 inch intervals. The wire stubs on these roofing nail are the key differentiator. After numerous calls to James Hardie, I spoke to a knowledgeable technician there who agreed that this would be a fine installation, even though it probably didn't meet the letter of the law for their warranty. I installed over 4000 square feet in this manner on my house in the Colorado mountains two years ago and have had zero problems. And, if I ever did have a problem, I could perform some remedial face nailing. Furthermore, the roofing coil nailer is fast, easy and cheap. Contact me at bkcoburn25@hotmail.com with further questions |
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bruce a james
Registered Users
Posts:1
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| 08/15/2008 7:19 PM |
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| Is there an ASTM Standard that qualifies SIPS for 50 years? |
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Paulcf
Registered Users
Posts:17
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| 08/15/2008 11:41 PM |
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| We can manufacture our SIPs with the Hardie board as the outside skin with OSB on the inside. Saves a lot of time. You would NEVER be able to pry the Hardie board off the foam that it is glued to! |
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GeorgiaTom
Registered Users
Posts:130
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| 08/16/2008 5:34 AM |
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Posted By Paulcf on 08/15/2008 11:41 PM
We can manufacture our SIPs with the Hardie board as the outside skin with OSB on the inside. Saves a lot of time. You would NEVER be able to pry the Hardie board off the foam that it is glued to!
Paulcf;
sounds like a good idea, do you have the blessing (in writing) from the hardie company to do that and still maintain their warranty.
and do you glue just flat sheets or is it available in glued lap siding as well?
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rnortman
Registered Users
Posts:94
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| 08/16/2008 7:53 AM |
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The problem with using Hardie as your outside SIP skin is that you can't ever (easily) replace your siding. Exterior claddings need to be repaired and replaced occasionally, and if your cladding is a structural member, you've got trouble. (Remember: your SIP skins aren't just to provide a nailing surface -- they're load bearing.) Nevermind that exposing structural members to the elements is also a little questionable.
On the other hand, if you don't care if your structure survives more than 50 years, it's certainly a cost-effective way to do it.
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Louie FischerSIPs
Registered Users
Posts:10
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| 08/18/2008 11:17 AM |
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| How do you stagger the joints in the hardie siding if it is pre-applied. I can see using it as a structural skin as a measure to reduce mold, mildew, and pest concerns while having the finished surface drywall provides. However, how you do you stagger the butt joints. Will that look funky if they are all lined up. Will you have craking problems in the future if all the joints are aligned to a seam. Do you know where I could go to see pictures of the panels being installed. |
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All SIPs
Registered Users
Posts:2
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| 08/28/2008 12:06 PM |
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Paulcf... what SIP company do you represent? I'd like to know more.
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rnortman
Registered Users
Posts:94
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| 08/28/2008 4:33 PM |
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EDIT: The post I was replying to was deleted, therefore my response is irrelevant. Unfortunately, there seems to be no way to delete my response, so this is the next best option.
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