Simon

December

0

Posted on December 28, 2012 by

Overview

DrawingThis past year was different to the previous ones because we finally started bringing in other professionals to share the plan with.  Confessing what I planned to do made it all more real.  In exchange for bringing people in, I had to relinquish some control, which was also a bit of a stress for me.  But I have to admit that having someone else do all the work of drawing the elevation views did free me up to think about details…

I some times think of it as “paying for friends to talk about stuff you like”, kind of sad and it didn’t really work out as collaboratively as I had hoped.   And since I am paying most of them, I could never really trust their affirmation that I was sane ;^).

The plan had been to start construction during Q3, 2012.  It didn’t work out, primarily due to delays with the engineer (who slowed down the architect because he was waiting for the architect).

If those delays had a silver lining, it was that they gave us more time to figure things out and time to set aside even more money for the build.  It also gave me time to meet Scott who was building his own earth shelter near Battle Creek and I learned some valuable things there.  I guess I will just keep right on learning things and improving the design, but at some point, I would like to start building and let the mistakes fall where they may.  My wife and I just had a little discussion about what could put off our plans to start in 2013…  That list of hurdles may be a good New Years post.  In the mean time, here is our year end update…

Plans

I went to the architects last April with a pretty complete idea of what I wanted to build.  I wanted help with the construction drawings and I wanted to get some perspective and collaboration.  The drawings are coming, and I certainly appreciate how delegating that task has freed up my time for details.  Collaboration (which I define as “talking thru ideas to come up with a better than either of us would have come up on our own) was elusive, but they did add a few good features to improve the design.

For instance, I had originally designed the front of the house with three concrete sunshades, but the architect combined them into a single one that really helped unify the front of the house.  He also improved the way the hall passed the sun room for better flow, adjusted the extent of the two smaller vaults for better rhythm and a few other things.  Some times, these changes caused problems that were left un-fixed… For instance, the combination of changing the way the hall went thru the sun room and adjusting the location for the end of the vault over the sun-room left us with a very undefined ceiling and load paths that hung in mid air.  I asked them about that for months without an answer.

Mid November, my architect mentioned that he thought his assistant had taken care of all our complaints and question and they were almost done…  I didn’t think so, so I went thru my emails (over 100 of them) and collected all the un-resolved issues into a ppt slide deck 21 slides long.   I mercifully broke things up so that each slide focused on only one sheet of the drawing.

These are sketches of the storm room that I got from the architect.  He never explained any of them to me (no collaboration)

These are sketches of the storm room that I got from the architect. He never explained any of them to me (no collaboration)

Some of the slides were short, such as the slide for the title sheet that simply pointed out an incorrect note about the foundations…  but other slides were quite long and detailed and included many points and drawings about various concerns that I had been waiting for answers to…  The architects took it pretty well, but over a month later, they are still working their way thru the corrections (and have not actually fixed that silly note on the title sheet) and have not gotten back to me on even one third of the questions.

The design development for the storm room never really got anywhere although the architect did send me a few sketches.  Perhaps these designs were not what I was looking for, or perhaps I was just looking for collaboration (an interactive back and forth exchange), but I didn’t like any of them.   I wanted something that would unify the design of the house, and I didn’t think any of these ideas did that…  Eventually this December, I sat down with my pencil crayons and solved a number of these problems so I could just present my solutions to the architects so we could move forward.

Our architect also drew up some quick 3D sketches.  We ruled them out for various reasons.

Our architect’s assistant also drew up some quick 3D sketches. We ruled them out for various reasons.

 

My wife and I met with the architect and his assistant the Friday before Christmas.  We showed our latest sketches for the “storm room” (the tower on the top of the house that will let us view 360 degrees of weather), and the structure for the entry and sun room (aka “green house”, but that would be hyperbole).  We also discussed our new window list and answered questions about the HVAC layout (ventilation actually).  While there, the assistant quickly modeled up something in 3D CAD (rhino3D) for the storm room and also showed us an interesting 3D model of the entry way in order to propose a new feature.  We liked his suggestion and are hopeful that the plans will actually be completed within a month or two, at least with the architect.

I am quite a bit more concerned about the engineer since we haven’t heard anything from him in over 7 weeks.  I will check up on his progress in early January.  The biggest mistake with the engineer was expecting too much collaboration instead of just validation.  I am sure it was frustrating for him since “collaboration” is not easy to estimate.  Now that I am neck deep, I wish I had been more specific about what I expected him to bring to the team, and I would have expected a lower price tag with that reduced uncertainty.

 

Sourcing

This past month, we meet again with Marvin windows and Pella windows.   Again, perhaps collaboration is a bit too much to expect from a window company…  But that really is what we wanted.   We originally planned on Marvin because they were one of the few American window companies that produced low-E glass with high solar heat gain.  They also had “push out” casement windows that I preferred to the crank outs… And they had very wide casement windows (possible due to their aluminum extrusion construction), french windows, more size flexibility, etc.  I totally ignored Pella for my first round, along with other “big box” brands.

Sherri and I never really liked the Marvin reps in our area.  Some never did get back to us with a quote (even though I visited several times) and the ones who did were a bit too pushy.  We got pretty far into the process with one location (that will remain nameless to protect the guilty).  Maybe it was just a generational thing, but we didn’t like their sales technique or how they talked to us without giving us useful information.  They used lots of phrases like “of course you want to buy the best”…  When I asked about how the features of a window affected the price, they kept saying they “hardly matter”.  For instance, I wanted to understand the difference between the cost of a round top casement and a regular casement mulled with a fixed arch top transom…  I knew the opening round top window would be more, but I wanted to understand how much more.  They went on and on about how I certainly wouldn’t want to even consider the fixed transom option, how it wouldn’t go with the style of the house and that the round top wouldn’t be much more expensive anyway…  Well a few days later when I finally got the price for each, I found the round-top was quite a lot more expensive.  Again, perhaps it was just their age, but they always acted like getting a price on anything would be a huge amount of effort and I had to come in to see them because it was difficult to get the quotes into an email…

In contrast, the Pella rep was very likable.  She understood that we wanted to understand the pricing so we could make good decisions.  She also joked that she was a part time marriage counselor  a roll we found she was pretty good at.  Every time we wanted to know a price for something, she would just enter it into her computer various different ways so we could see the effect.  This was enormously helpful.  She built the window list on her computer right in front of us.  We could see the options she was entering and ask her about adjustments, etc.  For instance, while the Marvin rep had hardly said anything about Tempered glass or given us the rules for it, the Pella rep explained all the rules (so we could design around them) and showed us the resulting price difference.  When she didn’t know something, she was frank with us and took a note for later…

Some of the windows from our window schedule.  The shape of W3 and the width of W4 were only available from Marvin

Some of the windows from our window schedule. The shape of W3 and the width of W4 were only available from Marvin

The quotes we had received from Marvin had ruled out the push out casements (double the price), along with French casements (quadruple the price).  We also found out that Pella now had the passive solar gain glass that we wanted.   We were down to a couple “special” windows forcing us into Pella…  These were a half arch top (W3) and its neighboring 40″ wide casement (W4) (Pella topped out at 35″ wide).   Not only would we have to pay the much higher Marvin price for these two windows (x2 for symmetry), but we would need to buy all the windows from Marvin (even the ordinary ones) and it actually more than doubled the overall cost of the window package.  Sherri and I liked the look of W3, it was one of the enhancements the architect added when he put the wide sunshade across the front of the house, but it wasn’t worth adding more than $30K to the cost of the home.  Neither was having W4 be 40 inches instead of 35.

 

Here is the window arrangement for the front of the house.  W3 tucks under the sunshade.  It is really a single window with a faux mull (to save money).  We decided to save even more money by making it a rectangle.  W4, the casement next to W3, would lose 7 inches of width.

Here is the window arrangement for the front of the house. W3 tucks under the sunshade. It is really a single window with a faux mull (to save money). We decided to save even more money by making it a rectangle. W4, the casement next to W3, would lose 7 inches of width.

We decided to make the switch to Pella.  We worked with the rep to adjust our window schedule to standard Pella sizes and tool that list into the architect.  One non “brand” change we made was for the 3 part windows at the ends of the vaults (W12)…  Each of the 3 sections costs the same price as a full width window of the same overall area, but the wall curvature forced us to break it into 3 sections.  The W12 combo of 3 windows was nearly $4K; since there were 6 of these, that would add up to a big headache.   We decided to reduce the height and have only the single central arch top for about 1/4 the price.

A CAD drawing of the rib, done by the engineer.   We talked a bit about this today and I would like to make it 4 inches thicker (12 x 12) so we can reduce some of the rebar.  I will also put some holes thru the right side so I can thread rebar thru and tie these into the central column more easily...

A CAD drawing of the rib, done by the engineer.

Another sourcing issue was finding a company to handle my precast architectural ribs.  I contacted a bunch of companies, but the first round were all concerned that they didn’t have the skill to handle it.  They were mostly experienced with highway construction or sewer components.  They did point me toward some companies that could help (the key was to include the work “architectural” in my search for “precast concrete”), but I have not received quotes from those companies yet.

 

Website

The website development is going slow (no blog posts in more than 7 weeks doesn’t help).  I did some work on some pages (such as this inspiring one on urinals ;^)).   At this point, we have had nearly 7500 visitors from all over the world (check out the map on the right) with a max of 127 hits on Nov 14th.

For some reason, my comment system has stopped working on the home page.  I will try to figure that out, but it looks like you can still leave comments if you browse to the post thru the tree on the right.

On the Houzz site, they did a bit on Hobbit homes that I thought I should post a link to

Oh yea, if you are reading this in your email, that doesn’t work as well as clicking the link and reading it on the website…  You get the pictures that way. ;^)  I also tend make a bunch of typo’s on my first draft that I catch 10 seconds after I post.  The live link includes any updates…

 

Eye Candy

And now the part you have all been waiting for…  A gallery of eye candy.

 

 

 

Resolution

I put this at the bottom so few will find it, but I here by resolve to create more, but much much shorter, posts for 2013 ;^)

November

3

Posted on November 7, 2012 by

This is another status update…

Sourcing

Lately, I have been getting quotes on plumbing related things and learning a lot about Solar Hot Water…  I haven’t had time to do the page justice yet, but here is the start of my Solar Hot Water page.  I have seen that there are many ways that these systems are put together in terms of connections between the solar array and the hot water tank and between the hot water tank and the backup heating system…  Many of the ways seem like terrible ideas, but I will talk about that on the separate page.

We have also updated our well quotes and things seem to have gone up by 20% over the past year.  Now that I have an actual site plan, I planned to put the well quite some distance from the house, but apparently that is not a good idea and I will need to find a closer location.

Engineering

Today we had our 3rd face to face meeting with the engineer.  It was our first since our G8 summit (which I thought I had written about, but I guess I didn’t) 5 months ago.  I have offered to meet many times, but they have not been interested.  I think our architect prefers to stay between his customers and his engineer, or perhaps they didn’t think I would help, or perhaps they didn’t have time to meet with me.  What ever the reason, I really think this separation has wasted a lot of time for this particular engineering intensive project where I could have helped a lot.  The project was supposed to be done already, but it feels like we are just getting started with the engineering.

Anyway, we had the meeting to get on the same page.  I had been asking questions over email for months without any answers since July.  We asked for the meeting because the 5 pages I have received so far showed that the engineer was not getting or not understanding the long and detailed emails, ppts and other documents I was sending.  He appeared to be designing the steel arches to carry the full weight rather than seeing it as support for the rebar and Shotcrete, which would ultimately carry the full weight.  Plus, as he put it, he had made the design even more “robust” than it needed to be.   The problem for me is that his more “robust” design would cost many times more to build, to the point where it might break my budget and prevent me from moving forward with construction at all.

Rib support drawing

The Engineer came up with this design to support the inside end of the ribs. It was different than I had originally planned, but would allow me to setup the ribs before the shotcrete work began, which might save a lot of hassle, even if I had to pay a bit extra for the post. We also talked about adding some holes thru the vertical portion so we could thread rebar thru and better tie these into the central column of the home.

At the meeting, I asked if he had considered the dimensions of the steel and rebar shown in the example plans that I had sent him back on May 4th.   These were fully engineered plans for a similarly constructed earth sheltered home that I thought he could use as a reference; but he clearly didn’t recall seeing those at all.   This was frustrating because I have been referring back to those in many of my emails and he never even replied to ask what I was talking about.  He also didn’t appear to have looked at any of the ppts of construction photos I had sent him that showed the kind of arches and assembly process I was talking about.  He did have a print out of my most recent sketches, and that helped with the conversation.

I had brought in a list of topics to discuss.  These had been building up for 4 months and we went thru them one by one.  It only took about an hour.  He said that he would “revisit” what he had done so far with my smaller sized arches, rebar, etc. as shown in the other engineered drawings, but of course, he will need to prove out the math himself.  That sounded reasonable to me.

We also talked a little about some other aspect of the design that he was struggling with (the overhang off the front of the house) and I told him he could simplify the problem by adding pilasters on the outside that took the weight off the curved wall completely.  Hopefully he saw that as an example of how I could help simplify future discussions…  We will see.

Most importantly, we talked about needing to get all the drawings done in the next 3 months or so.  They agreed it would be “no problem”.

 

Website

I expect we will reach 5000 all time visitors this week (since June), last week alone we had 416 visitors…  Not bad considering I have hardly told anyone about the site.  I will start talking about it after the pages get filled in better or maybe not until we are actually ready to break ground…  I got a deal when I started my site to get 100$ worth of Google Adwords that I can use when I am ready.  Google Analytics tells me that the most popular search term used to find my site is still “The Hobbit” (brought in 135 visitors since June).  A search for “Earth Shelter”, my main focus, was only in 6th place and “Earth Tubes” were in 8th place.

 

Eye Candy

This is the part of the show where I just dump a gallery of pics I have been looking at or making lately…

Construction industry insight

Posted on October 29, 2012 by

While sourcing to build your own home, you can find out all sorts of interesting things about the industry.  Of course, a lot of money goes into the housing industry, and along with that money comes incentives for various groups and corporations to game the system…  Here are two short examples.  For a third one, consider the Low-E, High SHGC controversy on the Windows Page.

Flush-less urinals

A typical toilet uses a lot of water to flush away a liquid.  Euro toilets have a second “number 1” button that uses much less water.  A urinal uses even less water, but still a lot.  A “flushless” urinal uses no additional water and with two boys, could save me thousands of gallons a year.  I asked a plumber about it and he said “no, those are very dangerous, you shouldn’t install one, they aren’t even legal in most states”.  Well, I have seen them in many airports and public buildings, and I know that the US Core of Army Engineers has switched to flushless urinals exclusively, so that didn’t sound right.

TO THE INTERNET! for research.  I found a lot, here is one with some good numbers and details, and here is one source that had a nice video, but here is the jist of the story in my own words.

Illustration of how the Falcon Waterfree Tech flushless urinal works… This is really the money maker behind the business as it represents a continuous revenue stream (no pun intended)

These flushless urinals are more common in Europe.   An american business man (James Krug, ex-exec of Disney corp and big donor to Al Gore) thought it would be a good green business opportunity here in the USA and started a business, Falcon Waterfree Technologies.  Not being totally altruistic, his design is based on a cartridge fluid trap that need to be replaced periodically at $40 a pop, but it would still be much cheaper than all the water that a regular urinal requires. I personally prefer the H2Zero model by Caroma because of its longer lasting trap design.  Click Here for a demo video.

James and others in the industry were “blindsided” by the plumbers union.  Of course, the union claimed it was a public safety issue and had some unqualified hack write a ridiculous report (based on no research, she had never even seen a urinal before being hired) to support their position that the urinals were actually “deadly”.   You don’t need to stretch your imagination to suspect that the union was actually more concerned about the fact that people who install flush-less urinals wouldn’t be paying plumbers to install water lines or do as many repairs.  Whatever story you believe, the building code was actually adjusted to ban the flush-less urinals.  But James Krug couldn’t let that happen to his fledgling business, so he used his connections to push the green angle.  So now the Democrats (yes it gets political) were on both sides of this one. They had union lobbyists trying to keep the plumbers paid and they had environmental groups lobbying for the water savings…  They had to come to a solution that made everyone happy, and they did, sort of.  The residential building code was adjusted so you can now install one of these flush-less wonders, and save all the water you want, but only if you also have water lines run to it (preferably by a union plumber ;^).    That is what political compromise looks like.

Steel stud framing

The front wall of the main portion of my home will not be earth sheltered or significantly load bearing… As a result, I am planning to use 6 inch steel stud framing.  This was definitely my architects preference (over wood studs).

We could not use ICFs for that south wall because there are too many windows (and not enough structure) to support the weight of the concrete above.  I guess we could have used ICFs below the windows, but the startup costs would be too great.  Also, ICF can be made to handle curved walls, QuadLock does it better than others, but it is still relatively expensive.

There are many advantages to steel studs, including reduced cost, longer life, increased precision, no chemical treatment, etc.  From an environmental perspective, wood is renewable but the steel is much lighter, longer lasting and very recyclable…   The only clear downside is excessive thermal bridging with the steel studs. Even though these steel studs are thin, they still act like a heat conduction highway.  In addition to allowing the heat out via high speed conduction around the insulation, they also produce cold spots on the interior walls that can result in condensation and visible ghost lines as dust and soot in the air get stuck in the condensation.

As usual, when looking for a solution…  TO THE INTERNET!!!

I found lots of very interesting papers such as this one or this one. They all seemed to be about 10 or 12 years old and they included lots of interesting ways to reduce the heat conduction…  The three main categories were;

  1. cut slits or holes into the stud to increase the distance the heat must travel thru the stud (like a maze).
  2. Stamp the faces of the stud to reduce the contact (conduction) with the wall coverings
  3. wrap the stud or the whole wall with insulation

 

The first two options are just a stamping process and could actually reduce the weight and cost of the studs while improving the thermal performance.   However, they did require an investment in research to figure out how best to stamp the steel for minimal conduction with maximum stiffness.  The third option is the simplest in terms of technology, but increases the cost of building considerably.  The third option could be done by wrapping each stud individually or by sheathing the wall its self, which is the most expensive because it uses the most foam and then also requires special attachment of an exterior covering to protect the rigid foam sheathing.   So, clearly improving the efficiency of steel stud construction would be in the best interests of the home owner, the steel companies and the planet.  Clearly, there would be a lot of money available for research and the winning design should easily take over the market…  But the steel companies didn’t count on the power of the petrochemical lobby.   While the steel researchers were busy figuring out a better steel stud, Dow Chemical and others were lobbying and adjusting the building code so it now requires all exterior steel stud construction to include insulation sheathing.  This undercut the innovative efforts of the steel industry and I couldn’t find any companies that sell the more advanced steel studs.  (Update, actually, now MarinoWare does sell studs like this, but you will need to special order to get them).

Here is a gallery of pics to illustrate…