How much door gap via season


Do doors ALWAYS stick in the winter when it is cold and dry? This is contrary to what I would have predicted. I think it would be the other way around. The wood of the door itself, with the grain pointing up/down I thought would shrink inwards, and the rough-out framing wouldn't move, because the grain, running side to side, would not be affected as much. But I have done doors before, and they seem to stick not when it would otherwise be expected.
The substance of answer to the above question is not necessary. However, I do need a practical solution to the following problem. I have 4 doors I have hung by myself into 2x4" rought out with mdf jambs. I thought I had given myself enough of a gap for expansion, etc. I am totally surprised, but after using bondo, shellac, primer, and now one of possibly two coats of oil paint I no longer have enough gap. I have to trim the edges of the doors. This I can do with a power sander as they are hanging and I can just swing them over to check for fit. But how much to sand, now that all I have left to think about is temp & humidity. There seems to be enough gap still on some corners, but it has disappeared at others. It is spring here in Toronto, and I can only guess at the peak of the dryness. But since I cannot reason what is going on, I have a hard time knowing what to do because my intuition and experience tell me completely opposite.
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Dry doesn't stick. Wet sticks, shifting frames stick, loose screws in the hinges from dry wood contracting stick....
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An old carpenter's rule of thumb: a dime on the sides and a nickel on the top.
Commercial doors are thicker. The point of beginning is to bevel both the strike and hinge side of the door with a 3 to 5^ bevel. The door dimension on the wide face of the door should be about a quarter inch smaller than the jamb face to face dimension (wide face of door 35 3/4" in a 36" jamb). This is the tolerance and fit of steel and Formica clad doors hung in steel frames.
______________________________ Keep the whole world singing . . . . DanG (remove the sevens) snipped-for-privacy@7cox.net

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It has just turned spring, so its the end of the long dry winter. Also a curiosity, what I am after is what others have noticed w/r/t doors sticking: winter, or summer.
Then I can go ahead with these corners gone wonky based on whether I am tight or loose now. Good news is I can get the gap perfect. I'm capable if I know what I'm doing - I ain't gonna do it and have anyhting touching anywhere ever, ir I can (just).
Is there a problem with (oil) paint sticking? Maybe during a hot sticky summer. I've got the hinges set. But if I sandwich (pinch) the inner sides paint to paint tightly (zero or negative gap) am I in danger of the (oil) paint sticking ever?
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