Let's take a typical bi-level house, say 26' x 40'. Attach an addition
of 16' x 40'. The addition would be parallel to the existing house -
i.e., the 40' dimension of the addition is on the same axis as the 40'
dimension of the existing house.
The existing roof is pitched at 4/12.
Here's a line drawing (only 4K). There is no roof depicted yet on the
addition. (The arrow points to the back yard)
The best solution so far, avoiding any dead valleys and resultant leak
problems, would have the roof of the addition at 90 degrees to the
main roof, and therefore higher than the main roof (by ~ 2') like
I see that the addition roof now looks much more massive. Outside of
some practical construction problems with the meeting area there right
at the main peak, what other flaws are in this approach?
(The rafters would be about 22', if the base of the right triangle is
20+1' and the height is 7', I wonder if I'd need trusses...)
The thing that nags at me is that this basic problem of extending a
bi-level/ranch must be encountered all the time - but I can't see a
good, basic solution, unless the whole addition comes off at ninety
degrees to the main house.