We have been long awaiting the day when we would raise our first wall of the tiny house, and it finally arrived! Right after we finished the subfloor we though we were ready to go, but quickly realized that we needed to do a bit more planning. As I’ve mentioned, we bought the plans to hOMe, built and designed by the Morrisons; however, with the drastic changes we made to the interior floor plan came a few small tweaks to the framing in terms of window positioning and the exact location of the front door. The little tweaks were enough to prevent us from completely following hOMe’s framing plans though, and we had to go back to the drawing board. As a fun little add on before heading back to the house to crack open Google Sketch-up, we decided to lay out our floor plan on our completed subfloor using painter’s tape. Here is the very first tour of our tiny house, on YouTube!
So, we went back to the drawing board and confirmed the position of each and every stud, and the exact position of each window and door. Tim is the SketchUp guy, so he worked on this, and it was very time consuming. I would highly recommend this software program though, it has been instrumental in our planning. Tim will write a post about his experience with it soon. We made an estimate for how many 2″ x 4″s we would need, and the number of those that would be 8′, 10′, 12′, 14′ and 16′ long.
The next day, we purchased the 2″ x 4″s, and organized them into stacks according to length, under our trailer – a great way to keep them out of the way and accessible at the same time. At that point, there really wasn’t anything standing between us and our first wall anymore. I don’t know why this was so intimidating… I feel like everything up to this point was just manual labour, that really anyone could do if they have time and willingness. There was something about the framing though that make me feel like we should have someone else there to at least supervise. As it turns out, of course, my worry was all for naught. Framing is SUPER fun, and very straight forward once you just dive into it. It’s sort of comparable to a puzzle of sorts, figuring out where everything goes and each piece fitting perfectly with its neighbours.
I’m no carpenter, but all you really need to know is that there are four types of studs: a regular stud, a king stud, a trimmer stud, and a cripple stud. Regular studs run through the entire wall space from the bottom plate to the top plate, and provide the structural skeleton of your wall. Often, they’re positioned on 16″ centres, but in our build we are using 24″ inch centres. The remaining three types are used to handle windows and doors. Since windows and doors are not meant to be structural, load bearing surfaces, they need help from the framing. The window header acts like a bridge that runs over the top of the window, transferring the above load to two trimmer studs at either end of the window. Trimmer studs run from top plate to bottom plate but they pinch a header, and in the case of a window, they also pinch a sill. This breaks the trimmer into three pieces. Trimmer studs are also called jack studs by some people, and they are always buddied up with king studs. King studs, one on each side of the window (outside the trimmers, header and sill) tie together the entire window framing assembly to keep it all nice and straight, and add additional rigidity.
Cripple studs are just like regular studs, except they run from the bottom plate up to a window sill, OR from the top plate down to a header. They are positioned on the ever important 24″ centre lines, and would normally run all the way through the wall space, but windows and doors get in the way sometimes!
It is possible for a window and a door (or two windows!) to share king studs, which we did on both sides of our front door. If one of your window/door assembly studs lands close to a 24″ centre, it may be tempting to forgo putting in a cripple or another regular stud, but it is really important to do it anyway. When it comes time to put the exterior (and interior for that matter) sheathing up, you need to have studs right on those intervals as a nailing surface. If you don’t, you’ll have floating edges of plywood, and that will create major weaknesses in your wall with respect to moisture, and structural integrity. WITH that said though, it is possible for a king or trimmer stud to land on a 24″ centre, and act as a nailing surface for the sheathing. We also had this situation many times in our design, which is great, because studs that run double duty let us use less wood, and the wall is that much lighter.
A note on headers: the size of a header is proportional to the width of the opening it is bridging. The instructions in our plans communicated that a 4′ wide opening would need a 4″ x 4″ header, a 6′ wide opening would need a 4″ x 6″ header, an 8′ wide opening would need a 4″ x 8″ header, and so on. Of course, like regular ol’ 2″ x 4″s, all these call outs in reality are 1/2″ smaller in both directions. It seems though that you can’t always buy wood of these dimensions, so you have to get creative. The three windows that go along the top of our front wall are all 5′ wide, so we constructed 4″ x 6″ headers using two 2″ x 6″s, with a strip of 1/2″ plywood sandwiched in between. The three pieces were nailed together liberally.
So, with that information, we went about building the first piece of our wall, flat on the deck of the trailer. Once it was built, we then lifted it up and stood it in place where it needed to go. From start to finish, this first 16′ long piece took us two days to complete. The second piece, which was just over 12′ took us only 7 hours to build and raise. Thank you, learning curve 🙂 It’s important to have a brace ready to go once you get your wall raised, so it can stay in place without needing someone to hold it. It’s also equally important to nail on some blocks to the edge of the subfloor, to prevent the wall from sliding off the edge of the trailer when raising it.
Tying the two pieces of wall together to form one cohesive unit wasn’t too hard. We are using what’s called a double top plate, which means that for each piece of adjoining wall, there’s an extra 2″x4″ stacked on top that is either longer or shorter than the regular top plate. Our first piece of wall was 16′ long, with a 12’3″ double top plate stacked on top. Our second piece of wall was 12’3″ with a 16′ double top plate stacked on top. When the two pieces come together, we can nail the double top plates together from above, and the seam between the two lies staggered and away from the seam of the two pieces of wall.
As you can see in the picture, the front wall is higher than the back wall – a difference of about 1’3″. This difference allows the roof to be sloped towards the back of the house, which is essential to prevent rain or snow from pooling on the roof. It makes sense for the slope to angle away from the front door too, so you don’t get soaked trying to get in on rainy days. The angle of the slope is what’s called a 2 and 12 (for every 12″ run/horizontal, there is a rise/vertical change of 2″) which converts to about 10°. A lot of people building tiny houses, and any house for that matter, use a gable style roof (peak in the centre, sloping down to either side). We think it makes more sense to go with the style in our plan, also known as a shed roof, because it allows the maximum amount of head room in the loft to be concentrated at one end. If you’re sitting in bed, chances are you’re going to be leaning against the headboard / wall, and your feet will be at the opposite end, so this configuration for head room is the best. Having the maximum head space in the centre would work if you like sitting in the centre of your bed, but really, when do you ever do that?