I have building permits in hand for a new home.
Now I’m experimenting with Sefaira to evaluate energy usage vs REScheck’s numbers.
Sefaira seems focused on commercial construction with a flat roof.
Our home design has a simple gable roof. The attic space is unheated.
It’s not clear which attributes to assign to an uninsulated gable roof and uninsulated gable walls.
Our design is simplicity itself: 1411 Honeysuckle_Sefaira_001.skp (171.7 KB)
• 4 Walls … R-27 SIPs
• 1 Ceiling … R-45 SIPs
• 1 Floor … R-50 Frost Protected Shallow Foundation Ribbed Concrete Slab w/ Hydronic Radiant Heat
The 5:12 pitch gable roof has 2’ overhands all around.
It’s clad with standing seam metal over plywood sheathing on conventional wood trusses.
I understand the ceiling is the thermal boundary.
What’s not clear is which attribute to assign to the gable roof and gable walls.
I presume they should be considered ‘Shading’ elements. ??