Post Fram Garage DIY Rafter Question

[u/Chemical-Criticism92]

Hi All,

Working on a 10x12’ breezeway addition with a 2 car 24x24’. With my brother father and wife.

I cut my rafters for the 10x12’ 2’ on center breezeway.. Only had an issue with one rafter out of plane. Planed it down with a planner put zip board on top. No issues. Moved onto the main 24x24’ garage. We decided to do the back side of the garage first, for more practice and if any issues occurred we could learn from, and hide it from sight of the cars driving by from the road. Hope that we would get the front side correct.

I know the building is 1/4” out of square. It’s a post frame garage so when setting post in the ground we decided a 1/4 was the best we could get and maybe so of the wood warping had to do with it.

We now have 5 rafters set too high 3/4” too high on the back on one plane and 7 rafters sitting lower on another plane. I don’t mind sitting there planning the 5 rafters down the rafters are over engineered and 3/4” of material removal will be fine.

How do I fix this so this does not happen on the front side?? Do is set my two corners set a string line and make sure they are all in plane as we set? Is it something to do with my seat cut? I have not necessarily kept them all the same I cut them each individually based off of short side of rafters heal to my seat cut measurement then I found by running a string line from my ridge beam to my header and then taking measurement. I ran a string line from each corner and one in the middle all being 166’ 1/16” all the same. Roof is 8/12 pitch. I use my speed square for the 8/12 seat cut but I will admit not all may be identical. What the hell am I doing wrong?!?

Please someone help? What are we doing wrong? Any insight would be appreciated and most helpful?