Hi,
I am trying to model a pitched roof which has a number of flat roof dormers built into the pitch of the roof.
When I go to model the vertical parts of the dormer, the vertical parts of the roof form a rectangle shape which appears to form a wall within the room below the roof.
Is there a way of modelling the vertical parts of the dormer roof so that they form a triangle shape which follows the pitch of the roof?
Thanks
Andrew
Thanks Shane
Hi Andrew,
I would firstly advise entering two separate roofs - one just over the ground floor and one just over the first floor (ie attic/dormer rooms). This will allow you to select only the relevant floor beneath each roof, and will stop irrelevant wall sections rising up to meet roofs when set up.
Secondly, you will need to be very careful that the outline of the roof matches that of the rooms below, and fully covers them. See image below where this is not the case - this will cause problems when setting up the roof,.
The above should also resolve the issue with the vertical roof section not correctly meeting the line of the pitched roof. Please let me know how you get on.
Shane Regan | Principle Building Performance Support EngineerHevacomp to OpenBuildings - A complete guide for every user | Bentley Communities
Hi Shane,
Thanks for looking into this, so if I build a roof over the ground floor should I treat the ground floor roof like an internal floor?
No, internal floors are taken care of by the 'Set Up intermediate floors/ceilings' option.
Taking a look at the Set Up Roof menu may help to clarify what I mean - see below where you must specify the floor immediately below the roof. Only one can be selected at a time.
With this in mind, what I was suggesting was to enter a one roof over ground floor rooms that have an exposed roof above them, and likewise a second roof over the first floor rooms.
If this proves too difficult due to the geometry (roof pitch etc) and if you would rather just have one roof drawing, then there is a second option, where you could:
1. Set up the Roof over the ground floor, but omitting all rooms that do not have exposed roof above. (For example for the area below, all rooms bar C5-10LK and C5-08C should be omitted).
2. Then, set up the same Roof over the first floor, again omitting any irrelevant rooms.
3. Finally, use Set up intermediate floors/ceilings to correctly set up room adjacencies.
Answer Verified By: Andrew Campbell
Thanks for your help on this. I ended up removing the dormers, putting the roof lights on the pitch of the roof and hand calc'ing the dormer heatlosses.
Andrew.