footing insulation

[andy_vick22]

I've got a slab on grade building, for which I want to insulate the perimeter of the foundation - how do I go about this in IES? The footings/foundations aren't specifically part of the geometry, so I don't know how to assign constructions; could it be part of the construction for the 'ground/exposed floor'?
Thank you

[Marc Jensen]

Hey Andy,

I would try the following:

Draw in your foundation then draw another room around your foundation. Make this room your insulating material and you are good to go.

Try this:




That would be ok accuracy wise. But you will need to simulate both the ground and the layers of the floor etc.

However in the past I have just manually calculated the total construction floor R Value and created a standard floor with that R Value. I would say that this technique would give an easier simulation etc.


There is probably an easier way but these are what I have done in a pinch when I cant be bothered messing around.

[PCully]

I think the Ground Contact U-value Adjustment in CDB allows you to enter the characteristics of the edge insulation, as Marc says this results in the overall u-value being modified to account for the effects (in this case of the constructions being in contact with the ground as well as the defined insulation) so that is as far as I know as far as you need to go to model this as part of your simulations really. You can calculate yourself or have a look at the adjustment VE can make for you via either EN ISO or F-Factor methods if you are unsure.

Phil