1. MODULE 9 – Building Envelope
Module Contents:
MODULE 9 – Building Envelope
• What is the Building Envelope?
• Envelope Details
• Wall Framing
Module 9
ARCH – Architectural Studio 2

2. What is the Building Envelope?
A building envelope detail show:
Structure
Insulation
Air Barrier
Vapour Barrier
Back Ventilation (rainscreen)
Finishes (interior and exterior)
Scale
Lineweight, Linetype, Separating Elements
Laying out masonry & masonry sizes
Module 9
ARCH – Architectural Studio 2

3. Rainscreen = a system, not a thing it manages moisture
Building Envelope – The Rainscreen Principle
Rainscreen = a system, not a thing
it manages moisture
Every well-designed rainscreen wall needs:
A water-resistive barrier (WRB);
An air gap between the WRB and the back of the siding;
Flashings at all penetrations and vulnerable areas; and (usually)
Weep holes at the bottom of the wall.
Ventilation openings at the top of the wall are optional.
Module 9
ARCH – Architectural Studio 2

4. Building Envelope - Pressure Equalized Rainscreen Wall
Module 9
ARCH – Architectural Studio 2

5. Envelope Details – Drainage @ Brick
Module 9
ARCH – Architectural Studio 2

6. Envelope Details – Drainage Plane for Siding
Module 9
ARCH – Architectural Studio 2

7. Envelope Details – Section for Wood Shingles + Cement Board
Module 9
ARCH – Architectural Studio 2

8. Envelope Details – EIFS @ Window Sill and Jamb
Module 9
ARCH – Architectural Studio 2

9. Envelope Details – EIFS @ Window Head and Jamb
Module 9
ARCH – Architectural Studio 2

10. Balloon Framing Wall Framing ARCH 28544 – Architectural Studio 2
Module 9
ARCH – Architectural Studio 2

11. Platform Framing Wall Framing ARCH 28544 – Architectural Studio 2
Module 9
ARCH – Architectural Studio 2

12. What your house is supporting…
Module 9
ARCH – Architectural Studio 2

13. ARCH 28544 – Architectural Studio 2
Module 9
ARCH – Architectural Studio 2

14. Wall Framing
Module 9
ARCH – Architectural Studio 2

15. Maximum spans for wood lintels, design snow load 9.4.2.2
Wall Framing Calculating lintel spans
Maximum spans for wood lintels, design snow load
OBC + Supplementary Standard SB-1
Canadian Wood Council Tables 21 & 22
Handy dandy tool:
Module 9
ARCH – Architectural Studio 2

16. Wall Framing
Module 9
ARCH – Architectural Studio 2

17. ARCH 28544 – Architectural Studio 2
Module 9
ARCH – Architectural Studio 2

19. Wall Framing
Module 9
ARCH – Architectural Studio 2

20. Required Reading Reminder:
Course Reader:
Canadian Wood-Frame House Construction – CMHC:
“Framing the House” p
“Wall Framing” p
“Thermal Insulation” p
Module 9
ARCH – Architectural Studio 2