When designing a house, is it weird to
have the north/south roof pitches be 12/12, while the east/west ones be 9/12?
This includes dormers and gables.
have the north/south roof pitches be 12/12, while the east/west ones be 9/12?
This includes dormers and gables.
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Replies
As long as you don't care about frying in HELL, no.
AitchKay
It'll fall over
A La Carte Government funding... the real democracy.
Even if the roof is on top rather than the bottom?
Even if the roof is on top rather than the bottom?
View Image "...craftsmanship is first & foremost an expression of the human spirit." - P. Korn
bakersfieldremodel.com
Those are all 12/12 pitches!
Wrong. Its a 3:12 pitch. You're looking at it upside down!"...craftsmanship is first & foremost an expression of the human spirit." - P. Korn
bakersfieldremodel.com
Well, 9 (one pitch) plus 12 (other pitch) is 21, and 12 on the one roof has a 1 and a 2 ( 12/12) and 21 has a 1 and a 2 so it balances out. Sure.
Spheramid Enterprises Architectural Woodworks
Repairs, Remodeling, Restorations
They kill Prophets, for Profits.
Seriously, the only drawback that I can see is that you'll need a bonafide roof cutter.
Rather than saying, "OK, the hips for this 12/12 roof will be laid out at 12/17," you'll have to solve for the diagonal in plan view -- what is normally the diagonal of a square, on a regular roof, will be the diagonal of a rectangle in your case.
And therefore the jacks on one side of the hip will be cut at a different (but still complementary) angle than the jacks on the other side.
It's all doable, though, and I've seen it look cool, too.
AitchKay
I'm not sure why it's weird other than the designer is attempting to give the house more height by having the east west slopes steeper.
Well, the location suggests some form of solar collection. PV, solar water heat, something. A 12/12 pitch for the north-south pitches would accommodate the collectors more easily.
But, the east-west ones, if too high, would block the view of the lake from some second floor bedrooms. A 9/12 would let the windows fit the view more nicer.
Are these design characteristics enuff to violate the "house falling down" rule?
What is the house falling down rule?
http://forums.taunton.com/tp-breaktime/messages?msg=117438.3
I know I can cut it (I have, once -- a 12/12 v 4/12), just don't ask me to bid it. I'm not THAT good!
Aitchkay
It is not unusual to design a roof with unequal pitches like that. I do it if there is a height restriction, which we have to deal with a lot here in the Greater Seattle area (the main roof would have a lower pitch), but the elements that contribute to a certain architecture could be steeper. The main thing is that the composition and massing is good. As far as small elements such as dormers, if they come off the lower pitched roof, they may look better with the steeper pitch, as opposed to vice-versa. A lot depends on the style of the home; a period-style design will give you less flexibility for instance. Unequal pitches will add some challenges for the guys in the field, but a good framer should not have any issues with it.
Ben
I think you will have abnormal levels of static electricity due to the unequal roof slopes gamma ray exposure delta.
May the moon shine where the sun won't.
no....it can be quite attractive.... draw it up
sounds like the main roof has dutch hips ?
Are the hips on the Dutch different than the Poles?
I prefer my wife's Irish hips, though.
With your blessing, I'm off to the board...
But seriously, what's a Dutch hip?
what's a Dutch hip?
http://www.easyrafters.com/dutchhip.htm
Not sure how this solves the problem.http://www.quittintime.com/ View Image
Just to answer Mike's comment.
And to that, now that I know, the Dutch will likely not be involved.
in your first post , you said the 9/12 would also be on the "gables"that implied dutch hips to meMike Hussein Smith Rhode Island : Design / Build / Repair / Restore
Forgive my misinterpretations.
But my plan is when looking at the hopuise from the east or west, I'll view 12/12 pitches, on everything.
When looking at it from the north or south, the roof pitches will be 9/12's.
In brief, I'm looking at a longish rectangle running east and west. Another also runing the same direction, but separated by 24 feet. And then in between, I'll connect the two with another rectangle, thus forming a bastardizied "H." That's the ruff floor plan.
The first rectangle being the garage, kitchen and dining porch. The second to be the bedrooms. The third to be the common living/loft areas.
And then these dormers/hipped roofs. Although a gable maybe employed someplace, most will be hips. I expect some serious wind forces on this site.
I'm doing hand sketches now before I start it in Chief. After that, I'll take it to a house designer I've used a couple of times over the past decades. Let him pretty 'er up. Then, it goes to the timber shops for pricing. Then, we plan in a TimberFest...
sounds good... you can post your sketches here as .jpg'sMike Hussein Smith Rhode Island : Design / Build / Repair / Restore
It's pretty typical in my area, with kick tails used to create equal overhangs. If no kicktails are used then either pony walls or unequal overhangs are used.
As far as cutting the roof, this is 2009. If you can't cut this roof, you have no business cutting any roof. Bastard pitches are framing 101.
Joist can be cantilevered or carry a plate for the steep side rafters to run equal overhangs. That is the main consideration, the overhangs. They have to be planned for. Square tail fascia and unequal pitches don't work well together, unless you have a planer on site, and a good grasp of trig.
In my opinion, kick tails look the best. that is when you maintain the same plate line around the house, but allow the steep side rafters to switch pitch at the plate line into the shallow side pitch. This gives a flared look.
I thought a Bastard Pitch was what the salesmen try to sell you wandering round your subfloor shouting up at you while you try and frame the roof.
Depends on your political affiliation..
Us liberals can have a 27/12 pitch on the west wing, a 9/12 pitch on the east wing and a 17/12 pitch on the main house and it looks fine and generates praise..
Conservatives can't.
Houses around here have all kinds of roof pitches.
To me, they're just numbers. What matters is the elevation of the house. If the house looks good, what does it matter what the roof pitches are?
Looks are #1. But,
Future (or present) solar installations should be about the lattitude in degrees. Where I'm building, it's close to the 45th. So that south facing roof I want to be a 12/12.
Snow loads are a factor. On the east side of Lake Michigan, I expect a far dumping from time to time. Although the structure should easily handle it, I have room for slide off.
And then, from the inside, a timber frame looks a bit more dramatic if it goes up more than a 3/12. But some at 12/12 are a bit much.
So, I've become focused upon the pitches...
If I'm correct, the old times had pitches in 5's , like 2/5, 3/5, 4/5. If you want classic looks, pick one near them.In case I'm wrong, I highly recommend this book for ideas on scale and style. http://www.amazon.com/Get-Your-House-Right-Architectural/dp/1402736282
Why not 10/12 all around?
Thie roof pitchs are fine.
Some roofs get too pointy and you need to lower some of the pitches to create a longer ridge line.
I know, but man I get sick of all the steep roofs.
You must not remember the 60's and 70's when everything was 4/12
Blue, I am 54, I remember, and have reroofed many!
Around here it was 3/12!
I suppose then you really hate my 27/12 pitch roof then?
not really.. you can roof those standing upMike Hussein Smith Rhode Island : Design / Build / Repair / Restore
I have a 24/12 and yes I hate them. But Mike is right, roofing them are easy!