Sloped Roof with Tapered Insulation

[architeach]

In RA2008 is it possible to create a roof that has a continuous slope for the deck and also have a variable for the tapered insulation to some drains? I want the tapered insulation to be the variable height object in the roof family structure. When we try to model this the tapered insulation will adjust to the slope and the deck becomes flat. If you use slope arrows or edges of the roof to define the slope you can't use the sub-elements points options to show the tapered insulation. We figured out that we can probably make two seperate roofs, one with the continuous slope of the deck and another for just the tapered insualtion with points. But I am curious if anyone has come across this issue or am I missing something? Will Revit just not do this as a single roof?

[twiceroadsfool]

Did you specify in the structure of the roof that the Insulation is the Variable material? I did a building roof in this fashion with tapering insulation to shed water, using the sub-element points to control it. It took a few tries to get it right, but in the end it worked...

[robert.manna]

Architeach, I recently saw this issue come up on a project here as well. They have essentially flat roofs that will be sloped, thus in some locations they need to cricket the roof to get the water to the drains. We tried to define the overall slope of the roof then use the VT feature to create the crickets. In our case the roof object was composed of a non variable metal deck, with a variable thickness layer of rigid insulation with a minum thickness of 4". Same as you, we couldn't use the sub regions & points once an overall slope was defined. We ended up having to "warp" the whole thing to get both the overall slope & cricket. I think in some cases they did as you did, and created seperate roof objects which were just insulation, to make the crickets. Its really unfortunate, but the feature is brand new for Revit Arch, so for the moment I'm willing to give the factory the benifit of the doubt.

-R

[t1.shep]

So, what's the best plan of attack to accomplish a sloped structure and tapered insulation roof?

[tecnicheparametriche]

Hello,

looking and searching around for this topic
I found out that there is a feature in the roof
structure that allows for variable materials.

Check out this tutorial by "The Revit Kid":

http://www.screencast.com/users/TheRevitKid/folders/Video%20Tutorials/media/088eb7e4-200c-410e-a548-ff38a89e8015

The tapered insulation varies, while the bottom
stays flat.


Stefano

[patricks]

Hello,

looking and searching around for this topic
I found out that there is a feature in the roof
structure that allows for variable materials.

Check out this tutorial by "The Revit Kid":

http://www.screencast.com/users/TheRevitKid/folders/Video%20Tutorials/media/088eb7e4-200c-410e-a548-ff38a89e8015

The tapered insulation varies, while the bottom
stays flat.


Stefano

Doesn't work if there is sloping structure and sloping deck.

[twiceroadsfool]

Sloping structure + deck, with tapered variable thickness insulation, we model as two seperate roofs. The first, using whichever method is most convenient for creating the geometry. The second (tapered), we use modified-sub-elements.

[Scott Womack]

We have actually created a roof-hosted obect that is a cricket. You set the slope of it, then drag its point, and the tiangular shape will change size and thickness.

[crawfords]

Sloping structure + deck, with tapered variable thickness insulation, we model as two seperate roofs. The first, using whichever method is most convenient for creating the geometry. The second (tapered), we use modified-sub-elements.

Would you care to elaborate on how you create the second roof. I'm not quite grasping what you mean by the use of "modified sub-elements." Thanks.

-Crawford

[Andre Carvalho]

Create the first roof (the structural one), then create another one on top of it (which will contain the tapered insulation). Then select this last roof and you'll see the Modify sub elements option in the ribbon. By clicking there, Revit will add points to each corner of the roof, which you can move up or down. If needed, you can add more control points or ridges/valleys.

By the way, I always create the structural portion of the roof as a slab (instead of a roof) and the tapered insulation as a roof, so the slab can be copy/monitored by structural team.

Andre Carvalho

[crawfords]

Hmm, that's what I thought. However, unless I'm mistaken, this will result in either:

A) Two roofs with overlapping volumes, or

B) Two roofs with a void in between them.

The trick seems to be to get the underside of the tapered insulation roof to match the top side of the structural roof.

I've attached a view of the type of roof I'm trying to achieve - a ginned this up in section using the Cut Profile tool i n section, but the ideal solution would be a 3D one. I've always thought that if it can be built in the real world, it ought to be able to be modeled in Revit...

-Crawford