Pros and Cons of ISBU Design [ArchDaily]

By Preston on Aug. 30, 2011 | Topics: Container Design | 27 Comments

We’ve seen teams around the world doing great things with shipping containers, or intermodal steel building units (ISBU). That said, even carefully designed projects seem to have challenges. ArchDaily, in a recent article called The Pros and Cons of Cargo Container Architecture, said: “Shipping container homes makes sense where resources are scarce, containers are in abundance, and where people are in need of immediate shelter such as, developing nations and disaster relief.”

The pros — adaptive reuse and strong, steel-frame construction — are obvious and don’t need much discussing. ArchDaily describes some of the following potential cons of cargo container architecture:

Con #1: Toxic Paint Coatings
“The coatings used to make the containers durable for ocean transport also happen to contain a number of harmful chemicals, such as chromate, phosphorous, and lead-based paints.”

Con #2: Toxic Wood Floors
“Wood floors that line the majority of shipping container buildings are infused with hazardous chemical pesticides like arsenic and chromium to keep pests away.”

Con #3: Upcycle Energy
“The entire structure needs to be sandblasted bare, floors need to be replaced, and openings need to be cut with a torch or fireman’s saw.”

Con #4: Ecological Footprint
“The fossil fuels required to move the container into place with heavy machinery contribute significantly to its ecological footprint.”

Con #5: Awkward Spaces
“Taking into account added insulation, you have a long narrow box with less than eight foot ceiling. To make an adequate sized space, multiple boxes need to be combined.”

Con #6: Opportunity Cost
“In many areas, it is cheaper and less energy to build a similarly scaled structure using wood framing.”

What do you think? If you’ve worked with shipping containers, do you agree?

Credit: Håkan Dahlström.

About Preston: Founder/Chief Editor of Jetson Green. Preston is an entrepreneur, innovator, and LEED AP living near the mountains of Salt Lake City, Utah. You can follow him on Twitter at @JetsonGreen or connect on Facebook at JetsonGreen.

http://nickwallen.posterous.com/ Nick Allen

They’re Just the wrong size as well. Once you board up the inside to flatten out the corrugations, you end up with a space JUST wide enough for a king bed, so the idea of a master bedroom you can walk around in is gone. I do like the portability, and perhaps larger freezer sized containers could work, but as said, SIPS and framing is probably faster, more portable and easier to tailor to your needs.
http://www.ronestudio.wordpress.com Jeremiah

While all of the cons are true, what is being missed here is the fact that anyone interested in building a home out of shipping containers (if they’ve done even the most rudimentary investigation) knows that there are significant changes to their lifestyle that will need to be made such as sacrificing that monstrous master suite for something more scaled and manageable.
And also, where are the Pros in this article? How about the fact that you end up with a solid steel structure that is bug proof, water proof, and nearly tornado/hurricane proof? Or that site erection can happen in days (once prefabrication is complete of course) instead of weeks or months like similar panel systems or stick framing.
Oh, and Con #5 is actually wrong. While a standard container is 8′-6″ in overall height (about 7-10″ in interior height) a high cube container (which is what you would want to use for most enclosed spaces) has an overall height of 9′-6″ which gives you an interior height of about 8′-10″. Using exposed ducting and LED lighting you can easily maintain a very comfortable ceiling height. Not to mention insulating the exterior of a container frees up the interior width, again making a more comfortable interior space.
The bottom line is there are cons and pros to every single building material used in modern construction. Are container homes viable despite the above mentioned Cons? Absolutely. Are they for everyone? Definitely not. As with any home design, you have to seek out a design and a designer that can meet your needs.
Paulo

I agree with Jeremiah… The title mention “Pros and Cons”… But the post only point to the Cons… Seems like propaganda for the wood framing industry… :
http://www.jetsongreen.com Preston

Yeah, because years of shipping container articles amount to propaganda for the wood framing industry: http://www.jetsongreen.com/design/container-design
http://www.jetsongreen.com Preston

I thought the pros, if any, were pretty obvious, but I’ve drawn that out in the article a little more.
http://www.facebook.com/profile.php?id=686346538 Anonymous

Pro: they make great coffee shops, food trailers, weekend cabins, or a backyard office.
http://www.facebook.com/profile.php?id=602290612 Neill Hope

Where are the pro’s?

Some of us live in environments where wood frame buildings would be inappropriate and unlikely to get planning consent.
Jeremiah

I actually laughed out loud walking down the sidewalk when I read that response Preston. Nicely done!
Mj13young

Con# 4 is complete BS. All building materials requires transport and lifting with heavy equipment. Do you really think that pieces of lumber just groes legs and walks out of the mill?
http://everydayishalloween.wordpress.com/ April

I have to weigh in on this one, because we are just about to build a shipping container home. Most of us don’t board up the corrugations–why hide the material? You can insulate one side or the other of the container, or use insulating paint.
Also, depending on the layout of the bedroom (maybe opening up the wall of a container and combining it with another), you can certainly have a king size bed–we will.
http://everydayishalloween.wordpress.com/ April

Also, and this is just replying to the general cons above, the flooring is controversial: it depends when and where your container was made. And the paint is the same issue that we’d all have to deal with if we were remodeling older homes. The ecological part isn’t exactly true either. My home designer’s last project produced only 12 contractor bags of trash during the entire building process. See here: http://numendevelopment.com/cordell

I’m no expert, but I’ve been gathering info for a year on containers. My blog is http://rocknrollproblems.wordpress.com, and I’ve been chronicling our preparation and building process there.
http://nickwallen.posterous.com/ Nick Allen

Thanks April, I’d love to hear of your progress. And I guess to your point – Insulation could be external. I tend to have a fairly restricted view. Already thinking about planning permissions in the UK.
I guess, its relative to your needs and desires too! I’m trying to think of that californian builder who did exactly what you’re describing, placed two long containers together lenghtwise to get a more traditional space.
Nick
Bill

April,
I am in need of some of that insulating paint for a project! Where can I get my hands on some of that?
http://www.jetsongreen.com Preston

Caveat emptor: http://www.scientificamerican.com/article.cfm?id=benefits-of-insulating-paint
http://www.jetsongreen.com Preston

Thanks for sharing and looking forward to following your project!
Atom Dari

i’m working out a really nice cabin idea (well, sort of a hobbit house from space) using these, and one benefit of them is that if you are building something out in a rural area, or on the side in your free time, you can use the containers themselves with very little start-out modification as a sort of barracks while you are out on site working each day.

also the treated floors can be coated with a wood-absorbant sealant, and then double coated with an industrial sealant and they would likely be up to snuff. not ultra eco friendly sounding, but the greenest thing is to use whats already there.
http://www.tincancabin.com/ Steve

Preston:

Interesting post, but I’ll have to disagree with some of your points. I’m almost finished with a three container cabin build from the past two years, so I do speak from some experience. I have dealt with Cons 1 and 2 through encapsulation. I researched the flooring treatment on my specific containers (new, one trippers), and feel confident that they are well encapsulated after several coats of industrial grade epoxy. In regards to the interior paint, it’s in great/new condition and with another coat of paint I can’t imagine how I could be exposed to anything. In fact, the vast majority of the interior painted surfaces are covered with 2″ of spray foam insulation and drywall.

The upcycle energy of Con 3 for my container cabin was virtually nil. I had two welders cut out all of my interior sidewalls in about three hours – not much energy use there. The ecological footprint of Con 4 is similar in that it only took about an hour or so for a small crane to lift the three containers into place. The builders crane we used is mostly used by him to place prefab frame home components into place, so they’re no better in this regard. The containers did have to be transported there by truck, but so would any building material I would have purchased in quantity.

You are correct with Con 5 in that you will want to combine multiple containers together as I have done, but consider that to have a large enough frame structure you need to combine multiple 2×4′s together. Either way it takes time and energy to create a larger space from smaller components.

Your Con 6 is right on the mark, and this is where many people make a mistake with shipping container construction. I could have built a similar sized frame building in less time and with much less cost than my shipping container cabin. I would have also gotten a lot less strange looks from my neighbors too. You may ask why I did it then. I really had no interest in their architecture or being green. For me, it was all about the security shipping containers offered. I was tired of my previous cabin being broken into and finally almost being burned down.

Even though I like my cabin and what it affords me, I will still recommend standard timber frame construction for anyone unless they have an overriding concern such as mine.

Steve
http://www.tincancabin.com/
http://www.jetsongreen.com Preston

Steve, thanks for sharing your experience. I’ve been following your project since maybe November of last year. Love it and hope to share what you’ve done here on this site when the project is complete.
Will

Jeremiah “How about the fact that you end up with a solid steel structure that is bug proof, water proof, and nearly tornado/hurricane proof”

In my opinion that is the number one reason to look into ISBU construction. In 2005 FEMA asked fire departments across the county to send help in response to Katrina,Rita,Wilma I was one of the people my department sent. I will never forget the destruction. This year my parents old home in Joplin Mo was destroyed by a F5 tornado only the foundation was left. I think it is a good idea to build a house that at least has a chance of standing up to what nature keeps throwing at it.
Will

Jeremiah “How about the fact that you end up with a solid steel structure that is bug proof, water proof, and nearly tornado/hurricane proof”

In my opinion that is the number one reason to look into ISBU construction. In 2005 FEMA asked fire departments across the county to send help in response to Katrina,Rita,Wilma I was one of the people my department sent. I will never forget the destruction. This year my parents old home in Joplin Mo was destroyed by a F5 tornado only the foundation was left. I think it is a good idea to build a house that at least has a chance of standing up to what nature keeps throwing at it.
Bill Cunningham

Pt. 1 – Toxic paint coatings – those can be sealed away….

Pt. 2 – ditto…

Pt. 3 – depends on the container… some are bare metal inside.

Pt. 4 – I suppose it depends on where you get your container from. They are in shipyards, train yards, scrapyards, etc…

Pt. 5 – You should also take into account that beyond the standard 8x40x8 container, there are those models that come in the 10, 12 foot heights.

Pt. 6 – And yet, when anchored into the foundation (which takes a day or so) you have a structure that is halfway complete and enclosed. It takes many weeks to get to an “enclosed” structure…

Besides, this is hot: http://youtu.be/AqLs2WCjiBo
http://pulse.yahoo.com/_E6TBIWIGO7WCTRBNMSFMUMNCQM Daniel

I build cabins from containers and the cons you mention are non-issues. Epoxy encapsulation for the floors work fine and foam insulation over the interior kills the other, too. Shipping? How do materials (wood, etc.) get to the site in the first place? Fly? Four containers and your ready to go – 1,200 sq/ft ready for fitting. Who needs more?
Richard Sheridan

The biggest impediment I have found with containers is the width which is designed for multi trip movements. The width when lined restricts design options
http://pulse.yahoo.com/_62IW5KKDO56PJJTDLJVMDRYCUA Gene

To use ISBUs as the material for a home does not mean that all of your rooms must be the width of a container. There are far more options for building a home out of these than lining up several containers or stacking them vertically. I prefer the plans that use the containers as the outside walls of the home with a great room in the center. Plus, once completed, a home built from containers does not need to look like it was made from them. The same coverings for conventional wood frame homes can be used to cover and insulate the exterior of a container home.

One more pro that seems to have gone unmentioned is the R Value of a home built from shipping containers. With good insulation practices (which others have pointed out can go on the home’s exterior) and a solid roof, a home built from shipping containers is going to be much less expensive to heat and cool. This will help greatly to reduce the need for power, allowing for clean local power sources like solar to heat and cool A home.

I plan to build a home from shipping containers and do most of the work myself. The roof will be made from SIPs with a metal roof on top of that. The metal roof channels will allow solar panels to be clamped onto the roof, eliminating the need to put nails, screws, or bolts through the brand new roof.

My goal is to build a house without a mortgage, eliminating the need for a house payment. I also want to use solar, wind, and possibly water power sources in order to be independent from the grid, with a back up bio-diesel generator for any days that aren’t windy. Having no mortgage and little or no electrical bill will leave quite a bit of income left over to prepare for retirement and for any disasters that might befall us before.
Harvey

Where have your found 10′ or 12′ containers? Aren’t the standard sizes 8’6″ and 9’6″? Correct me if I’m wrong.
http://www.facebook.com/profile.php?id=100000206227282 Joe Raidho

I really loved your comment Mj13young. It is true. Some of the Cons are to be considered, but there are more pros as well. One of the most important is the cost. Very cheap to buy, transport, and modify.
Msmaryntn

what about arch style steel buildings? they have a more usable space, can be converted into a residence and are more versatile for about the same price per sq ft.?

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