How to Avoid Wavy Look on Hardie Siding
walking around my neighborhood at night, I saw some wavy hardie siding. It was likely the lighting that emphasized it, but i felt alarmed by how bad it looked. I don’t have a photo, but have questions.
My situation:
I have framed some walls at 16″ o.c. and others at 24″. I’m putting up housewrap now, and will add strips of wood for a rainscreen (about 1/4 – 1/2 inch, maybe plywood strips?).
I plan to staple the furring strips up on top of the studs (locating the studs using a studfinder which hopefully can ‘read’ through my 1/2″ cdx plywood sheathing and the housewrap. (Before putting up the top layer of housewrap, I can see where the stud layout is above and start the furring strip install by plumbing down.) I know it’s critical to hit the studs when installing the hardie plank siding.
I haven’t decided on a width for the hardie. Was planning to install with hd galvanized 8d nails (2 1/2 inch) with a pneumatic nailer.
我确实找到了一篇文章，说使用镀锌螺钉改进了结果，尽管不确定为什么。我也确实看到一些波浪性是由不当加冕的螺柱引起的。我认为我做得很好，确保我的螺柱都被“加冕”，但我想这可能是真实的时刻！
1.更宽的木板更容易发生波浪状？我可以透露6-8英寸。
2. I’ve appreciated the look of the 16″ wide stuff that is applied flat with z flashing above each strip (can someone tell me what that is called)?
Anyway my concern is that installing the siding over 24″ spacing will create that wavy look.
3.我应该添加额外的rainscreen条帮助苏pport the hardie?
4. Consider the thicker artisan hardie (2-3x much more expensive as I recall)?
I’m not getting the prepainted hardie, not using the woodgrain textured, in case that matters.
I would hate for it be obvious where the studs are and aren’t!
Thanks for any advice on this. I’m attaching a picture of the house I built this summer…
p.s. I used metal to cover the exterior crawlspace insulation (rockwool comfortboard). Pretty happy with how that turned out although it was tricky to figure out the entire assembly.
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Replies
我对主要问题没有评论，但是我确实对2-1/2英寸的指甲发表了评论。我的房子里有哈迪，安装人员使用了2-1/2”的指甲。我花了数年的时间才找到了他们击中管道的所有地方（假设我已经找到了它们）。有时，直到指甲生锈，泄漏才会发展。我想他们也碰到了电气，但到目前为止，这并没有引起问题。将2-1/2英寸的钉子驾驶到成品房屋的墙壁上要求问题。
我的回忆是，Hardie壁板的安装说明允许屋顶指甲。那就是我要使用的。
批准取决于的紧固件circumstances. Roofing nails aren't going to be sufficient to go through a rain screen and embed deep enough in the stud. 2.5" doesn't seem overly long to me. The planks are 0.75", the rain screen 0.25-0.5". That only leaves 1.25-1.5" embedding in the stud. You shouldn't have plumbing that close the exterior. Electrical is supposed to be 1.25" away from the stud edge, according to code. If that is the case, going with a 0.5" rain screen will give the 1.25" clearance.
I think it's unlikely you'll detect studs through plywood using a standard stud finder. You can buy special ones that detect metal, which will detect the nails or screws under the house wrap.
我建议您不锈钢钉与镀锌。
安装说明在这里：
https://www.jameshardiepros.com/getattachment/513223b4-054b-4112-ab6b-6b-38974c62c9cb/hardieplank-hardieplank-hardieplank-hz5-us-en.pdf
For attaching to wooden framing, they recommend:
• Siding nail (0.09 in. shank x 0.221 in. HD x 2 in. long)
• 11ga. roofing nail (0.121 in. shank x 0.371 in. HD x 1.25 in. long)
For attachment directly to OSB they recommend:
•壁板指甲（0.09英寸柄x 0.215英寸HD x 1-1/2英寸长。
• Ribbed Wafer-head or equivalent (No. 8 x 1 5/8 in. long x 0.375 in. HD)
I wouldn't hesitate to nail to the sheathing. If you've ever stripped roofing or siding you know that the nails hold far better to the sheathing than they do to the shingles or siding.
Back to my house: I don't have a rainscreen. The siding is 3/8" thick at the nailing point and the OSB is 7/16". A 2-1/2" nail is going to go in 1-11/16". My framing is 2x6 and I have 3" PVC drain pipe running in the exterior wall. The PVC has an actual dimension of 3.5" and the fittings are 4". So the pipe is 1" from the stud surface and the fittings are 3/4". The plumbing never had a chance.
Thanks for the reply, DC Contrarian. I have not yet installed the plumbing, and the majority of my plumbing will not be in the exterior walls, since I have a conditioned crawlspace. However it is worth considering using shorter fasteners in the walls that will contain plumbing (only a few locations).
我不太明白这一评论：“我会毫不犹豫地钉在护套上。如果您曾经剥离过屋顶或壁板，您就会知道，指甲对护套的效果要比对带状疱疹或壁板好得多。“
I plan to aim for the furring strips which hopefully will coincide with the studs, although I've missed the studs plenty of times in the past. If I nail to the sheathing between furring strips, that seems like it would increase the waviness, so I guess I could increase the number of furring strips, especially in walls where I have 24" spacing between studs.
Finally, thanks for your observation that the waviness is possibly worse on wider hardie planks. I haven't yet chosen a width so going a little narrower at this point is an easy way to get a better effect. Does anyone else have similar observations to share?
最后，我确实有18英尺或24英尺长的墙壁，窗户有很多干扰，因此希望较短的跑步能够帮助整体外观。
指甲的任何地方都必须距离墙壁相同的距离，因此，如果您想钉在两者之间，那么是的，您需要在那里毛茸茸。由于您要钉在毛圈上，因此您需要将固定剂穿过足够深的毛茸茸，以使底层底物中的固体固定，或者必须比钉书钉更加固定毛茸茸。我认为，与上面链接的一份有关基材的底物要求，包括雨屏，包括雨屏。
I've only installed factory painted hardie clapboard, and it was ten years ago, we did a bunch in a new subdivision in Maine. It is a funny product imo...
I think the wavyness would be reduced to non visible by the shorter runs your dealing with, not to mention your vantage point like you said... I was siding 70ft runs on 2 stories..
Keep that siding dry and off the damp ground, bottom of the pallet was usually floppy like compared to the top pieces which has a noticeably more solid integrity.
感谢您提醒您保护Hardie免受水分的影响。建议我在准备安装之前不要将其交付，并防止它免受雨水的侵害。感谢您的提醒，詹姆斯。
只是一个观察：安装传统的雪松壁板时，在下面的层上钉上钉时会稍微卷曲。虽然这些碎片是软的，但卷发足以使其更加刚性，并使其保持直线。虽然哈迪也很软，但我看不出它以同样的方式卷曲。
I know the wavy look you're talking about but I don't know how to prevent it. It seems more pronounced on wider planks.
The easiest way to avoid wavy fiber-cement siding is to use a different product. I prefer natural wood, but when clients insist on something with petroleum in it, I spec LP Smartside.
为什么LP Smartside（一种木纤维产品）比纤维水泥更容易发生波浪？
它很硬。
Fiber cement boards don't have any petroleum products as far as I know, I even double checked the SDS and didn't see any.
LP Smartside does though.
我没有说是这样，但是我本来可以更清楚的。我尝试规格天然木材和其他未经处理的材料。当客户坚持使用木材以外的其他东西时，出于美学原因，我一直能够从纤维水泥中说出来。但这剩下的要么是我偶尔做的金属壁板，要么用石油（乙烯基，Boral Truexterior，LP Smartside，可能是我忘记的其他人）。
Fair enough. The indefinite article strikes again.
Cedar siding will last a very long time if it is oil primed on all sides and ends before installation. I have had some jobs that did not need a repaint until 20 years later. The oil back priming is the key to wood siding longevity. I prefer cedar rabbeted bevel as it is thicker and nails flat against the exterior.
当我住在高火危险区域时，我非常适合哈迪。否则，雪松壁板本来是我的首选，而且我确实在几年前建造的较小的木工工作室上使用了它。我使用了“一生”的木材处理，对到到目前为止的外观很满意。
谁能对工匠哈迪（厚得多）评论，而不是常规的哈迪木板？
A mesh rainscreen will provide better horizontal support to the siding than an air gap.
Not clear to me that if you have nails/screws into the studs that you can't also put a midpoint nail/screw into the sheathing - providing better vertical and horizontal support.
When you install your furring strips, use a string line and shim out your furring strips to make the wall as flat as possible. It will take a bit of time but the wall will look much better. There are some examples on youtube if you want to see how it's done.
Thanks Alex. That sounds tedious but probably would go a long way to improving the end result. Do you agree that wider hardie plank will make the problem worse?
宝拉，
There are two things that can cause waviness in Hardi-siding. The first is the distance between supports, that you have already got advice on. The second is the gapping between the bottom edge of the boards and the piece below, and that is a function not only of the frequency of fasteners, but their correct placement.
Thanks Malcolm! For example if I put the fasteners up too high on the board, it might not lay tight to the board below it? That makes sense. I"ll be sure to follow the installation recommendations for that detail. I didn't mind the exposed fasteners when I did cedar (I used stainless nails). But here I was planning to use blind nailing since that seems to be recommended. The only place nails are also recommended is where I am butting two boards together. I have seen exposed nails lower on the boards in that case.
我会跳过对接接头上的裸露指甲，如果需要，您可以随时添加它们。如果还没有，请考虑一小部分15磅的焦油纸或铝闪烁的铝。