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Thermally Broken Facades TClip System for Rear Ventilated Rain Screen Facades
- February 22, 2013 page 1
2
Products
Design
Installation
Engineered Assemblies’ Values Celebrate Architecture Better buildings matter for the world Uniting the house of Design with the field of Construction
Forces influencing design of TClip
- February 22, 2013 page 3
Contractor in mind: • Constructability • Cost • Adjustability
Architect in mind: • Aesthetic freedom • Allow for greater amounts of insulation
Code/ Building Envelope Science • Morrison Hershfield
Directions in the Code
• Higher thermal resistance requirements and increasing over time • Effective R Value, not nominal • Thermal resistance set by geographic location • Less window areas, more opaque walls
• Based on ASHRAE 90.1, being adopted in Ontario, Quebec, BC and those using NBC.
- February 22, 2013 page 4
Note: Code changes are for the whole building. There are various ways for you to comply. Although EA is an active participant with the Code, like you we rely on the NRC and the Consulting Engineering community for clarity on specific projects. A good overview is available in both French and English at http://www.nationalcodes.nrc.gc.ca/eng/presentations_necb/presentation.php?pres=3-envelope
Tren
ds in
Bui
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g Co
des
- February 22, 2013 page 5
What EFFECTIVE R Value do you need?
Geographic Location
- February 22, 2013 page 6
- February 22, 2013 page 7
Effective Insulation requirements going up, by zone in the country
Thermal Bridges – yes the old ways just wont work. Now We Know!
- February 22, 2013 page 8
Its all about metal going through the insulation in an opaque wall
Anything bridging from warm to cold causes a thermal bridge AND Breaks the plane of the insulation AND Worse the more insulation required
Old Ways Wont Do
What were the choices in the past
- February 22, 2013 page 9
Old Ways Wont Do
Source Morrison Hershfield
How we got here
- February 22, 2013 page 10
Passion for something
better
Materials Knowledge
Simple Building
Principles
Committed to
Architecture
Façade Design
Cladding Installation
- February 22, 2013 page 11
Its Time
Why TClip patent pending
• Thermally broken façade suitable for Rear Ventilated Rain Screen ( RVRS ) • Non combustible construction • Adjustable for subwall misalignment • Cladding joints not tied to stud locations – design freedom • Easy construction, cost effective
– fewer rows of clips than others, no insulation stickpins, insulation installed easily and completely, simple window, door and edge conditions
• No premium over double girt system • Suitable for weather barrier (as required by European DIN Standard) • Suits all structures; steel stud, block, concrete • Black vertical girts – corrosion resistant and best aesthetic • Traditional installation practices, no training needed • 3 clear field insulation thicknesses • Designed to European DIN Standards, with prescribed airflow • Supports Engineered Assemblies materials • Made in Canada
- February 22, 2013 page 12
- February 22, 2013 page 13
Trends in Design
- February 22, 2013 page 14
RVRS interest
Higher R Values
Building Envelope
Engineers on team
Building Performance
Better Design
Building Aesthetic
- February 22, 2013 page 15
Thermal Performance of Engineered Assemblies Thermal Clips Summary
Presentation based on the Executive Summary written by
- February 22, 2013 page 16
Executive Summary The Engineered Assemblies Thermal Clip System is an aluminum thermal clip
system for attaching rain-screen cladding systems for steel stud wall assemblies with exterior insulation. Morrison Hershfield was contracted by Engineered Assemblies Inc. (E.A.I) to model the system in order to provide thermal performance values.
The system is comprised of aluminum clips connected to horizontal and vertical sub-girts that support rain-screen panel cladding. The clips are attached to a steel stud back-up wall.
Thermal breaks are provided at the connection between the sub-girt and clips via a cork/neoprene pad and between the clips and exterior sheathing via an aerogel
insulation pad. See Figure 1 for a simplified rendering.
- February 22, 2013 page 17
Source: Morrison Hershfield
- February 22, 2013 page 18
• Meets the prescriptive requirements for non- residential steel stud walls in ASHRAE 90.1-2007/2010 for all climate zones.
• Performance of the system is validated through Modeling and the Finite Element Analysis (FEA)
• Designed for Mid- and High-Rise (Non-Combustible) building envelopes
• Engineered to accommodate Façade panels generally 8-26mm in thickness
• Engineered for wind loads up to 50psf • Optimized vertical spacing – 900mm up to 1200mm apart
- February 22, 2013 page 19
TClip Performance Engineering Complete
Results of Old Girt Systems
- February 22, 2013 page 20
One example – Designer wanted R25. With Vertical / Horizontal girts, ended up with R17 (U.058 or 69% effective – not compliant!)
Thermal Performance modeled for 3 clear field dimensions and vertical Tclip spacing
- February 22, 2013 page 21
94% effectiveness or 47% which do you prefer
- February 22, 2013 page 22
Thermal Profile of TClip System
Continuous Z Bar Thermal Performance
TClip Thermal Performance
Model holds for all insulations
- February 22, 2013 page 23
The slope of lines are similar, so effective thermal resistance is independent of - Thickness of insulation - Type of insulation
So pick the best insulation you can afford, and TClip provides you the ASHRAE 90.1 and highest effective solution
Conclusion
- February 22, 2013 page 24
The O
ld S
tand
ard
- February 22, 2013 page 25
Horizontal Girt
The N
ew S
tand
ard
- February 22, 2013 page 26
Adjustable Horizontal Girt
TClip
Thermal Breaks
- February 22, 2013 page 27
T100
T150
T125
Three Clear Field Dimensions - Adjustable for wall alignment
- February 22, 2013 page 28
Plan
Vie
w
- February 22, 2013 page 29
Plan
Vie
w W
ide
Hat
Bar
- February 22, 2013 page 30
Win
dow
Jam
b
- February 22, 2013 page 31
Out
side
Cor
ner
Why TClip patent pending
• Thermally broken façade suitable for Rear Ventilated Rain Screen ( RVRS ) • Non combustible construction • Adjustable for subwall misalignment • Cladding joints not tied to stud locations – design freedom • Easy construction, cost effective
– fewer rows of clips than others, no insulation stickpins, insulation installed easily and completely, simple window, door and edge conditions
• No premium over double girt system • Suitable for weather barrier (as required by European DIN Standard) • Suits all structures; steel stud, block, concrete • Black vertical girts – corrosion resistant and best aesthetic • Traditional installation practices, no training needed • 3 clear field insulation thicknesses • Designed to European DIN Standards, with prescribed airflow • Supports Engineered Assemblies materials • Made in Canada
- February 22, 2013 page 32
What matters with Thermally Broken Façade Solutions
- February 22, 2013 page 33
System Design Freedom =
Cost effective
Non combustible
Suited for Ventilated facade
Works w All Insulations
Design freedom = clips free to be anywhere so Architect can create with no limits from substructure
What panels?
- February 22, 2013 page 34
Engineered Assemblies Panels
Competitive Façade Panels
Metal Panels
Stone
Open to ideas!!!
EA has all the info for you
- February 22, 2013 page 35
Youtube Installation Animation
Design Guide
MH full report
LnL Preso
Sources of more information
- February 22, 2013 page 36
http://www.engineeredassemblies.com/products/t-clip-thermally-broken-facade-substructure/articles,-links-and-references.aspx
NECB / NRC
Morrison Hershfield website
CAGBC, OBEC, CEBQ
Many others
- February 22, 2013 page 37
John Kubassek
Blair Davies
Engineered Assemblies
905 816 2218
Go to www.engineeredassemblies.com - Full MH report - Executive Summary - Youtube video showing installation
