Extenal Roof and Interior floors

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Dear e-Quest Users,

I have modelled my 3-storey building in the detailed Wizard. There, I
described 3 building Shell components, each one is located above the
other. When I check the building at the component tree I see that the
internal floors/ceilings are defined as external Roofs. E Quest seems to
add up the layers of the Internal Roofs and the External Roof
construction to define the intermediate construction. Has anybody had
the same problem in the past?


Christina Galyfianaki

Christina Galyfianaki's picture
Joined: 2011-09-30
Reputation: 0


Did you remove any definition of roof in the 1st and 2nd floors?

Wizard Screen 3 - under roof definition - no exposed roof (or something
like that).

That should fix it.

John R. Aulbach, PE, CEM

Aulbach, John's picture
Joined: 2011-09-30
Reputation: 0

Yup - eQUEST builds an external roof over your entire lower shells if
you define a roof for the shell, not just the exposed bits. So, if you
have a building with decreasing footprints, you either have to add roofs
in in the detailed edit and leave them out of the wizard, or define them
in the wizard and then delete the non-exposed sections in the detailed
interface. This is one of my biggest frustrations with eQUEST -- mostly
because it was a client who caught this one for me as I had triple the
roof area of the actual building (not good for credibility).


bfountain's picture
Joined: 2011-09-30
Reputation: 201

Can you go into greater detail about how you acomplish this. I have been
playing with it in the Detailed Mode but cannot seem to figure out how to
re-draw the roof boundaries to define my exposed/unexposed areas.

Marcus Eliason

Marcus Eliason's picture
Joined: 2011-09-30
Reputation: 0

Typically, what I do is leave the roof off in the wizard on the shells
with partial roof exposure (and on where the shell has full roof
exposure). In the detailed mode, where a defined space has a fully
exposed roof, you can simply add an exposed roof to the top of that
zone. The issue is when a space has a partially exposed roof. Here,
there are two options, the selection of which depends on my client and
their understanding and expectations. The simple method is to define a
roof of equivalent area to the exposed portion (I usually add a
rectangle). This adds the appropriate thermal roof load to the space --
but doesn't look good in the 3D view.

Or -- you can define a new polygon in the detailed interface that
represents the shape of the exposed roof. Then you create the exposed
roof portion, link its shape to the new polygon and locate it correctly
with respect to the space -- this gives you the 3D view. I have done
both -- depend on how important that 3D view is to my client
(surprisingly important sometimes).

It does have to be accomplished at a space-by-space level.
Occasionally, I will modify my zoning to take the roof exposure into
account to make the process easier.


bfountain's picture
Joined: 2011-09-30
Reputation: 201