Cutting height from internal doors

Hi All,

I bought the below doors to replace my existing. I bought the size closest to my existing frames. The width is fine, I might have to shave a small bit off but the height I may need to take 20mm off.

Every YouTube video I have watched says you always cut off the bottom when adjusting for height but the issue is that this door says it has 11mm lippage all the way around.

It's a solid core door but I assume it's MDF inside once you get past the lippage..

Whats best practice here, cut 10mm off the top and bottom or just take the 20mm off the bottom because it won't be seen?

Thanks

https://murphylarkin.com/NM5-Primed-Internal-Door

Lumen

20mm off the bottom because it won't be seen?

Surely it will be seen because the shaker panels will be different heights top and bottom.

I've only hung a couple of doors but I'd be inclined to cut top and bottom to keep it symmetrical.

Hooked

I'd go top and bottom - skill saw (with makeshift guide) or plunge saw on a rail if you can.

Panels top/bottom will be even and you won't compromise the door.

You could first drill a pilot hole with a small bit to gauge the depth/solid portion.

https://www.boards.ie/discussion/comment/122223071#Comment_122223071

The shaker panels are always different sizes, the bottom is always bigger than the top unless you chopped 3 inches off it, the reason is depth perception, same as why the hinges top and bottom of a door are different heights.

I am actually going to call them tomorrow because the doors arrived now and to me they look completely solid and the packaging makes no reference to lipping like that website I referenced does