If the main door is on a negative pad, does a clockwise or anti-clockwise route to the boundary gate change its results?
Yes. A correctly placed door with an anti-clockwise (heen bahu) exit gives fewer good results than it should. A door on a negative pad such as E5 or E6, whose route runs clockwise to a gate on W4 or W5, gives much less negative effect than the pad alone would.
Related questions
Must the house be at 0 degrees for a sarvatobhadra dwar?
By definition it is at 0 degrees with doors in all four directions, but it can be made otherwise too: build the doors on whichever pads fall on Pushpdant, Grihakshat, Bhallat and E4.
Can doors be opened anywhere by vastu, or must the birth chart be checked?
Check the birth chart. If the Sun in the chart is debilitated and you forcibly open an E3 or E4 door, it will be wrong and not appropriate at all.
Can yellow mustard and gomti chakra be put at a South-West main boundary gate?
Yes, it will benefit. These two items are not limited to any direction and can be used anywhere. Put the yellow mustard in properly dug pits, because if it meets moisture and sprouts it does no good. The specific South-West gate remedy is taught separately.
Do the main door rules apply to the outer boundary gate too?
The boundary gate carries only about 10 percent weight. The door through which you enter the house itself is the main door; the outer one is just the boundary-wall gate.
Do these pada results apply to the boundary wall door, the main door or every door of the house?
There are three types of doors: the boundary wall door (for example the entrance of a multi-storey building or the gate of a bungalow), the main door through which you enter your own home, and room doors such as the kitchen or bedroom door. The interpretation applies mainly to the main door. The boundary wall door also plays a role, but much less, because even after entering the gate you cannot get into the house if the main door is locked.
If the main door and boundary gate face each other but fall on different pads, is it still good?
Yes, if the offset is within one pad (11.25 degrees). For example, a gate on N4 with a main door spread over N4 and N5, mostly in N4, or a main door on N4 with the gate on the N4-N5 junction, still counts as utsang (sammukh) dwar.