3. Learning concepts
• Set assumptions for Ventilated Rainscreen Facades
• Common themes
• Design in process; detailing, specification
• Design through to construction
• Combustibility and code
• Constructability
• Value Engineering
• Other systems
• Precast
• Curtain wall
• Brick
2018 Confidential 3
4. What Matters with Ventilated Rainscreen Facades
• Building Envelope: Insulation, thermal bridging, air, water and vapour.
• External of structure best, continuous, more = higher effective R Value
• Issue of thermally bridging solved
• AVB and Weather membranes can also be continuous.
• Between studs; last resort, bridged, ineffective.
• But we are “wrong” because code allows imperfect envelopes because modelling can reduce
importance of better building envelope.
• Enforcement insufficient?
• Rainscreen
• Vertical girts, typically 1” deep. Can be wood, galvanized steel, aluminum
• Wall open top and bottom, protected by bird screen
• Often open at horizontal joints; aesthetic choice
• Panels, attached in various ways, allowed to expand and contract at will
• Detailing for aesthetics, durability, constructability and structure.
2018 Confidential 4
5. Confidential 2018 5
All examples of ventilated rainscreen
Early modern example
Ventilated aluminum rainscreen
Water and weather shedding and
protection part of rainscreen idea Ventilated panel architecture of today
6. 2018 Confidential 6
So What
➢ Open top and bottom = ventilation = moisture
management
➢ Thermally broken insulated façade = effective
7. Learning concepts
• Set assumptions for Ventilated Rainscreen Facades
• Common themes
• Design in process; detailing, specification
• Combustibility and code
• Constructability and construction expectations
• Value Engineering
• Other systems
• Precast
• Curtain wall
• Brick
2018 Confidential 7
8. 2018 Confidential 8
Concept Design
Detailing
and
Specifying
Engaging
Contractors
(Tender)
• Design intent
• Finish
• Shape and
direction
• Aesthetic
• Panel choices
• Role of
supplier /
agent
• Narrow panel
choices
• Layout
• Code compliance
• Budget
• Role of supplier /
agent
• Details with other
elements
• Not too much! Be sure
Contractor owns it.
• Narrow choices of
installers
• Spec
• Role of supplier / agent
• Tighten budget
• Contractor
credentials
• Shop drawings
expectations
• Value Engineering
• Constructability
• Role of supplier /
agent
Common Themes: Design in process; detailing, specification
9. 2018 Confidential 9
Common Themes: Combustibility and code
Basics; egress and spread
Facades
• Can ULC S114, 135 and 134
• 134 impact in Ontario
• Alternate solutions
• Insulation choices
• Membranes
Interiors
• S102
• Fire code
• Structural issues / role of engineer
• Most of key issues not covered in Code, so
important to refer to Manufacturer’s
Instructions
• CCMC and Part 3
10. 2018 Confidential 10
Common Themes: Constructability and Construction
Constructability
• Weather, vapour and air barriers
• Insulation in right place and
thermally broken.
• Subgirt assembly and spacing,
including clips
• Allowing for expansion and
contraction
• Structural engineering
• Trade handoffs
• Framing to Cladding
• Cladding to Windows/Doors
• Cladding to Roofing
Construction: what happens on site
• Safety = Quality!!
• Confidence in contractor
• Wall acceptance handoff
• Spaces, gaps
• Process
• Accuracy
• Waste
11. 2018 Confidential 11
Common Themes: Value Engineering do it now.
• Impact of design
• Layout
• Complexity; details
• Labour
• Experience
• Learning curve
• Benefit of speed
• Product
• Base price
• Waste
12. 2018
Confidential
12
Other systems: What matters to you?
Ventilated
Façade
Precast Curtain Wall Brick Stone
Design
Freedom
Detailing
Durability
Thermal
performance /
investment
Price range
Speed
Environment
EIFS
Metal Panel
Siding
Residential
products
Spandrels
13. 2018 Confidential 13
Solid Phenolic
Brick Rainscreen
Fibre Cement Rainscreen Siding
Terra Cotta Rainscreen
Stone Composite Rainscreen