为什么EPDM屋顶，欧洲乙烯基窗户，而乙烯基壁板是邪恶的？
我看到了许多“绿色”建筑物，他们重点关注占用健康，同时拥有EPDM或TPO屋顶，乙烯基窗户，但我从未见过乙烯基壁板。
So I guess this is a two part question based on heavily processed materials and their effects on indoor air quality.
我正在设计一个级别的家中的单个故事板。如果没有地下室或爬网空间，我一直在辩论带有缝线金属的条件式桁架屋顶，或一个有条件的开放式网底桁架组件，并在屋顶上俯仰，盖上60或90 mil的EPDM盖。
The flat roof assembly is just simpler to run ductwork through the open web trusses than deal with dropped ceilings, or enclosing and conditioning a pitched trussed roof without spray foam.
I hate rodents and bugs with a passion so any roof assembly is going to be unvented in as much an attempt to keep them out as possible.
So my questions are these:
1: Are there health concerns with EPDM rubber that would make it far less preferential than a standing seam roof?
2：为什么三重釉面的乙烯基窗户如此受到追捧，但是乙烯基壁板被回避了？是否有与窗户相同的乙烯基制成的乙烯基壁板，使它们更容易接受？
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Replies
CC，
当查看可能具有负面影响的材料时，重要的是要区分它们是在建筑物的空气弹药内还是在外部使用。乙烯基壁板和EPDM屋顶都不应对室内空气质量产生任何影响。也许可以说，非常敏感的人应该避免乙烯基窗户，因为他们的内部框架暴露于室内空气。
I think the case against some plastic uses comes not from their health effect so much as when a large amount is needed to make a product that has reasonable alternatives. I think that's the problem with vinyl siding for most critics.
A lot of vinyl siding looks like sh--t.
Besides most of these green builds that you see around here are either big $$$ custom homes or rehabs on a shoestring budget where existing siding will remain in place.
I think the main reason vinyl siding is frowned upon is that many green builds are very high end homes, and they tend to use premium materials. Vinyl siding is usually considered to be be a cheaper alternative to fancier siding materials like fiber cement. This is similar to the difference between using laminate or granite for your kitchen countertops.
As Malcolm mentioned, materials used on the exterior shouldn't really contribute to indoor air quality concerns. Any smell coming off of a new EPDM roof, for example, will be quickly dissipated outdoors and is unlikely to be a problem for the occupants of the structure. Vinyl windows are the only one of the three items you mentioned that are inside the home's envelope, but I'm not aware of anyone complaining of health problems due to vinyl window frames.
In my opinion, many of the supposed health concerns regarding modern materials used inside homes is due to people misunderstaning things, or just being scared, often because of bad information floating around on the Internet. Modern plastics tend to be VERY stable materials, which means they don't react with many other things, so they don't release any of themselves into the air. The major exceptions to this tend to be more related to improper installation (such as a bad spray foam install) rather than any inherent problems with the materials themselves. I have often seen people get scared of materials when they hear the scientific name (for example, table salt sounds much more chemical-y when you call it "sodium chloride", but it's the same thing). For a funny take on this, check out the dhmo.org website. "Dihydrogen monoxide" is a different way to say H2O -- water. That site is commonly used by science teachers to point out the just because something might have a chemical-sounding name doesn't necassarily mean it's bad for you.
Bill
The main reason I would choose standing seam over EPDM is longevity; steel roofing can last 50 years or more with a little maintenance, while EPDM will last 20-25 years at best. At the end of its life, steel roofing can be recycled while EPDM will be landfilled or possibly burned for energy. Eating either one is not good for your health. For what it's worth, I've never heard of bugs or rodents getting into a vented roof if there are screens over the openings.
该网站的前编辑马丁·霍拉迪（Martin Holladay）最近在这里讨论了乙烯基壁板问题：//m.etiketa4.com/article/environmentally-responsible-siding。每个产品选择都涉及一组决策。有了三层玻璃窗户，我认为我们大多数人都更喜欢使用木框装置，但是它们的成本比PVC高 - 有时更多 - 并且要么具有更高的维护需求，要么在外部使用铝像乙烯基一样，环境影响负面影响。对于屋顶，EPDM或TPO用于低矮的屋顶上，因为很少有其他产品可以使用，而这种产品（如平滑铜）在天文学上昂贵并且具有重大的环境影响。有了壁板，有很多选择可供选择。马丁认为（我同意）乙烯基是一个不错的选择。但是我从来没有一个客户发现乙烯基壁板的美学是可以接受的。
There is little difference between the PVC used for siding and windows. Some window reps make a bid deal about windows using unplasticized vinyl, but as far as I know there aren't plasticizers in vinyl siding either.
Thanks, Michael. Here's a link to another relevant article on this topic:"Vinyl Windows and Vinyl Siding"
马丁，
这篇文章将重点放在了我周围的东西。我的邻居是该地区的一个开创性家庭。他们失去了一个儿子伐木事故，他的弟弟使用了另一个轮椅。然而，尽管他们似乎是致命的，但我敢打赌，他们会从失去与工作场所暴露有关的癌症的癌症中退缩。我们是一个有趣的物种，并不总是根据纯粹理性的考虑进行设计。
Michael,
The pest infestations I've found ion roofs and attics have often been due to the ventilation strips protected by bug screen. That's one of the reasons I'm not keen on relying on them for the bottom of rain-screen cavities.
Malcolm, I briefly thought about the best choice of word and went with "screen" for expediency. Have you seen infestations when the screening is metal, as required by the IRC, or when punched aluminum strip vents are used?
Michael,
这都是没有规律的纱门从专业网bably the '70s or '80s. I just evicted two recently deceased rats from the eaves of our Community Hall which has the added bonus that the screening was stapled from the now inaccessible top side. I'd like to replace it all, but with current material prices I'd probably have to sell a kidney first.
I put up a lot of fiberglass screening before seeing the code requirement for metal screening, and I imagine this is why it's there. But yeah, everything is $$$ these days for sure!
>”PV几乎没有区别C used for siding and windows. Some window reps make a bid deal about windows using unplasticized vinyl, but as far as I know there aren't plasticizers in vinyl siding either."
You are probably correct there. Plasticizers are used to modify the physical properties of the material, which in this case usually means to make it more flexible. The example I like to use is between PVC pipe and PVC extension cord insulation. PVC used in pipes is in it's natural rigid state, so no plasticizers are needed or used. PVC used for extension cord insulation needs to be relatively soft and flexible, so plasticizers are used to make the normally stiff PVC resin more flexible. Modern plasticizers are much more stable than they once were, so there are less problems with them getting out of the material over time. If the material looses the plasticizers over time, it will gradually get hard and crack.
I agree the PVC resins used in windows and siding are probably very similar. Both will likely have UV stabilizers, and both probably have some kind of fire retardant (maybe), but in terms of plasticizers, both applications use a rigid PVC so plasticizers aren't needed.
Bill
I like you flat roof idea the question becomes can you insulate it to a reasonable level a reasonable cost?
如果您与EPDM一起使用，请考虑使用再生泡沫将绝缘材料放在屋顶顶部。
Architecturally your flat roof may look out of places in most neighborhoods.
In my opinion triple pane windows do not make sense until you are very far north.
I think of my home as green complete with vinyl siding and windows.
Walta
I used Vinyl siding on my vacation home in Canada 25 years ago, mostly so I didn't have to maintain it. It aged well and only required power washing a few times. Would I use it for my main residence here in the NE? No, but I see it all the time. It's relatively inexpensive and maintenance free.
Blue Vinyl the Movie from 2002
https://www.imdb.com/title/tt0303307/
https://en.wikipedia.org/wiki/Blue_Vinyl
What happens at the end of the vinyl siding life. Couldn't recycle it then, not much has changed.
视觉上乙烯基壁板的最大问题是角落。我认为可以通过高端角落治疗赚钱。
EPDM roofing will last much longer than 25 years. Mine is 12 years old and still has the white printing on it. Metal,. other than soldered is not really a flat roof material. I don' t think EPDM ever fails in the way a shingle roof fails.