Print at Dec 20, 2025, 4:56:10 AM

Posted by Jonnie63 at Apr 15, 2019, 8:32:11 PM
Re: Guide To Creating A Flat Roof With Cut Outs For Skylights
Additions:

I did not explain the following bit very well....its about making the White liner for the hole in the roof.

I wrote...

"The useful thing about walls created on a level is that they start not at the top surface where you would walk but on the bottom surface of the level."

Yes that is true but what I did not mention is that even before you add any height to the wall it is already as high as the floor is thick - the wall is measured in terms of its height above the top surface of the floor. If you could have a zero height wall it would in reality be as high as the thickness of the floor.

If I recall you cannot have a zero height wall so the wall can be set to a height of say 0.1 cm, this means it will start at the same level as the ceiling - pass through the entire thickness of the floor ( actually our roof ) and stick above the top surface of the floor (actually our roof ) by 0.1 cm.

Just remember when setting the height of the White liner that you already get the thickness of the floor ( our roof ) for free !!!