Up On The Rooo-ooofff…

The roof is going up!   A little later than planned, but weather and finances, health and mood all have to come together in a perfect storm.   It’s OK though, because I spent the time re-thinking (for approximately the thousandth time) how I wanted the roof to come together.   And of course I changed my mind…again!   Actually, I didn’t so much change my mind, as recall a method of insulating my flat roof that I’d run across more than a year ago.   So glad I came found it again!  This is the illustration from the website Building Science Information:

Breaking the thermal bridge

Basically, you build a thermal break into the roof with an extra layer of exterior grade plywood over a layer of rigid foam insulation.   You can’t use OSB, which can’t handle moisture or breathe ~ it has to be plywood.   One of the local lumber yards sells what they call “utility” grade 3/8” sheets for only $10, which I feel is fine for this purpose.   The more (thicker) insulation you use, the better ~ I used 1 1/2 inch expanded foam.   I really wanted to use extruded foam, but it’s out of my financial reach.   This extra layer goes up before the trusses, and creates a thermal break, making the insulation laid between the trusses more effective.   It adds to the total R-Value, as well.

An important step is to keep interior moisture from getting into the foam, so having a vapor barrier between the rigid insulation and the interior air is vital.   On the other hand, it’s also vital to allow any moisture that does get into the foam or wood an easy path back to the outdoors.   Good ventilation combined with keeping rain out is key here.   I’ve purchased perforated foil radiant barrier to ensure air flow, and will keep wind and wind-blown rain out of the roof with a good-sized overhang and deep fascia.  The point of the foil is to keep insulation fluff in place, while still allowing it to breathe with the perforations.  I’m using this stuff:

perforated radiant barrier foil watermarked

48 inches wide so easy-peasy to install

 

There are products made specifically to create air channels, too, called Attic Vents or something similar.  Some I’ve seen are made out of cardboard ~ easy to DIY.

 

Here’s a simplified list of the roof layers:

Ceiling treatment ~ in my case, I’ll use painted barn boards.

Vapor barrier of visqueen/thick plastic sheeting

3/8 inch CDX plywood

1 1/2 inch rigid foam board (R-Value 7.5)

3/8” CDX plywood

2×8 trusses filled with 5 1/2″ Roxul (23 R-Value)

ROXUL COMFORTBATT

Almost as good as sheep wool, and more familiar to any inspectors who nose around once I’m on my property.

Perforated radiant barrier

23/32” CDX plywood sheathing, with the gaps filled with a flexible sealant

.60” thick EPDM from Gentite fully adhered to the sheathing

10 by 25 feet ~ no seams!

 

I am pretty sure I have linked to this site before, but it’s so full of good information that I’m going to do it again.  You can get lost in there, digging ever deeper in technical building goodness.  Anyone thinking of constructing a building should check out the Documents section, even if it’s not a DIY.

UPDATE: I started writing out this blog entry on June 2nd, and didn’t get around to finishing up that day.  Now, a couple days later, I am embarrassed to say that I’ve managed to injure myself (again).  I’d like to pretend it hasn’t happened, but this is a record of my experience building my own home.  And part of that experience is the occasional (I HOPE it is only occasional) booboo.  Soooo, this time I jacked up my right knee pretty well.  It’s actually kind of amusing, as I first hurt this knee way back a couple years ago when I was first starting out on the build, by tearing the meniscus.  A few shots of cortisone, several weeks in a brace, and many painful months later I could walk without a limp.  But the dratted thing locks up multiple times daily, and on Saturday morning it locked up while my hands were full of plywood, causing me to force it straight instead of babying it out ~ ow!  Then, a few minutes later, I dropped that same sheet of plywood (on edge) onto that knee.  Swearing ensued.  THEN, and I’m still not clear how I managed to do this, I hyper-extended the SAME KNEE with my full weight plus (you got it) a sheet of plywood TWICE, and felt something finally give in the back. OMG OUCH!!!

Yeah. Don’t work alone with heavy stuff if you can help it, and always make safety your highest priority.  Trying to get the roof on in dry weather, meaning fast, caused me to do several clumsy things, and now I’m in a sort of removable cast to keep the knee immobile, and supposed to stay off the leg entirely.  Probably won’t happen, as I still need to get the roof on before it rains again.  We’ll see.

Here’s some pictures of what I gotten done so far:

1/4 inch sheets of plywood are hard to manage when you're short and out of shape

1/4 inch sheets of plywood are hard to manage when you’re short and out of shape

I painted these sheets top, bottom and sides because I wasn’t sure if they are CDX.

 

Laying out the rigid insulation

Rigid insulation

Starting to frame in the rigid insulation “sandwich” layer.

 

Covering the foam with thin CDX plywood

Covering the foam with thin CDX plywood.

This is still pre-knee destruction.  Look at the cool camo paint, heh.

 

This is some of the pile I schlepped back and forth on the roof

This is some of the pile I schlepped back and forth on the roof.

My son came over early Saturday morning to hoist a bunch of heavy/bulky stuff up to the roof for me.  I really wanted to do this whole house by myself, but I simply could not get these heavy things up there.  Of course, this meant I had to repeatedly move a big pile of (heavy!/bulky!) stuff around, trying to keep it out of the way.   Great workout.  At this point I’ve already done some of the knee damage, but the hurt hasn’t truly hit yet.

 

Trusses laid out, before cutting them into the right shape

Thermal break put in, and more room to work in!  Trusses laid out, before cutting them into the right shape.

My 2×8 trusses measure out to literally 7 inches, not 7 1/2 like I expected.  This meant I could only use 5 1/2 inch insulation batts instead of the 7 1/2 inch I originally planned on because  I want a good inch and a half of air between the Roxul and the sheathing.  I purchased the planks from two different lumberyards, so I guess it’s just lumber math?  Heh, or instead insert men measuring joke here.  So now I’m only getting an R-Value of 23 between the trusses, instead of 30.

 

Waste, but not too bad.

Waste, but not too bad.

The middle of the trusses are left at the full 7 inches, and are cut down to 6 inches at the ends.  Not quite as much of an angle as I wanted, but there’s that whole “7” instead of “8” inches thing again.

 

All washed up and ready to be cut to size.

All washed up and ready to be cut to size.

Part of my huge pile of wood pulled out to use for the flying rafters and barge boards.  I had to scrub a couple years worth of dirt off of them, due to losing the pile in canary grass.  That stuff grows to over 6 feet here!  Not my fault for piling it in the pasture, nope!

 

DIY bird blocks to ensure great air flow and hopefully no bugs.

DIY bird blocks to ensure great air flow and hopefully no bugs.

Bird blocks are those wood pieces with holes covered by mesh you find up under the eaves.  From the research I did, the holes don’t offer enough air flow in most cases, so I made these.  The mesh I used is 1/8th inch to deter insects stapled to 2x4s.  These will be obscured by the deep fascia boards I plan, which in theory should keep rain and direct wind out of the roof interior.

That’s all for now!

 

Offline Antics

I just got a taste of off-grid life I’ve been dreading ~ no internet.  I’m still in the middle of a city, and cut off from my life-line….

One of the consequences of choosing land way out in the wilderness is a lack of  amenities.  No easy-on power, no land phone lines, no internet (no 4g or even 3g).   Spotty cell phone coverage.  No fire department close by, nor police presence. I  bought the property knowing all of this. Good thing I like simple living, right?   Being certifiably nuts helps, too….

It took a couple days for the Comcast-free lifestyle to sink in…No Netflix?!  No  quick google searching?  What’s going on with Pinterest today, who’s emailed me,  what can I expect from the weather?  Ack!  Simple breathing exercises helped with  the adjustment.  Once the panic (seriously, panic) subsided, I remembered a precious  thing ~ books.

Oh, lovely books.  I have such a huge library, even after purging time and time  again, that I don’t anticipate running out of reading material for years.  However!   Most of them are boxed up and stored away and not accessible in preparation for my future move.

I also kept busy with the build.  The top plates are on, all windows and doors  framed in, and some other details attended to.  I used the time to revisit proper  roof framing, too.  So glad I have Building Construction Illustrated, by Francis  D.K. Ching.  I will use it again and again while building the other structures I’ll  need.

I finally found and purchased a pretty sink.  It definitely was a bathroom sink, but  is deep and wide enough to do dishes in.  Kitchen sinks are just not attractive to  me, and seem to run either very large or laughably small.  If not for living in this  trailer, I’d not have known how important having a big enough sink is. I’m totally  over wanting a “cute” tiny kitchen sink.

Last, I unexpectedly located two more windows from the Tacoma ReStore.  If I’d found  the windows even a day or two later, too much would have to be changed in the  framing, so the timing was very good.   I decided to move the two 4-foot, non- opening arched windows from the loft and replace them with the new, openable (is  that a word?) windows to allow more air flow and cross breezes.  One of the arched  windows is now framed in over the french doors.  The other is being kept for a  planned add-on once Oliver’s Nest is in place on my land.  I love that the addition  will sport an identical window, tying it in with the original space.  Oh, and the  new windows I found?  $25 each.  Brand new.  Same brand as most of the others I  have, too.  Very big smile on my face.

Newest windows framed in

Newest windows framed in

 

So very tall!

So very tall!

 

I still haven't re=stacked the barn wood

I still haven’t re-stacked the barn wood… There is so much more than it looks like here.

 

 

So lucky to have found great windows that match

So lucky to have found great windows that match

 

Gratuitous critter pic.

Gratuitous critter pic.

Sheathing Is Up! Well, Some Of It….

Yes!  All the trusses have been cut off:

2014-03-13 12.38.41

Several of them are still “hanging around” (heh, I amuse myself) up on the top plates to keep them out of the way.  I need to set aside a block of time to take them apart and try to salvage all that metal strapping on their joints.  If they won’t come apart, I’m considering throwing them onto the burn pile to remove the wood.  I really would prefer not to, as the wood might be usable in some project, but I really want that strapping – it’s a nice, heavy gauge, and definitely reusable.

The hurricane straps are all finally on the lower portion of the house, and the frame is looking strong!  Even before putting them on, I could climb the structure like a monkey and nothing would move, but having all that extra strapping tying things together soothes the worrier in me.  The weight it adds is negligible.

There was nothing keeping me from starting on the sheathing, so I went for it!  And quickly realized a big problem – I canNOT put 4×8 pieces of wood up by myself.  Nope.  Not gonna happen.  So, what’s a girl to do?  Why, ask her 78 year old mother for help, that’s what!  Oy.

It sounds worse than it was.  I did all the heaving and hefting , and piled up cement blocks to prop the plywood sheets at the proper height.   My mother just sort of leaned on them while I clamped them into place.  She helped eye the spacing between sheets, too, while I shifted left, right, left, right, holy cow this is getting heavy, left, right… Yeah.  I strongly recommend having at least two reasonably strong and healthy people working together during sheathing.  Three would be better.  One person…nope.  Unless it was He-Man.  Or The Hulk.

Working together, we got sheathing up all around the lower half of the house.   None of the sheets are completely nailed up yet, only enough to hold them firmly in place.   This has allowed the upper half of the vertically placed plywood sheets to wave in the wind a bit.  I know it looks funky and unprofessional, so refuse to post a picture.   Once everything is neatly nailed up, then I’ll get some pictures up for posterity.

So.  I need to finish nailing up all the sheathing that’s in place, and to salvage the metal straps from the failed trusses, and then to get the loft beams into place.  Been popping outside to work between rain showers the last couple days.  I plan to start on the loft by the end of this month, weather permitting.  Yay!

I want to put out a request to anyone reading this, to feel free to give feedback on my interior layout sketches.  Did I miss anything?  Is there something that you like, or don’t?