AIA Rainscreen Presentation 2007

Download
Share  Add to  Flag Embed
Views:
 
Category: Entertainment
     
 
License:   All Rights Reserved

Presentation Description

No description available.

Comments

Presentation Transcript

Slide 1: 

Presentation on the Application of the Rainscreen Principle with Current Construction Practices by Pohl Inc. of America

Slide 2: 

Public Concern for Mold & Mildew

Slide 3: 

The Case for Rainscreen

Slide 4: 

Litigation on the Rise

Slide 5: 

The Case For Rainscreen 888 O'Farrell Condo Project San Francisco California

Slide 6: 

International Building Code 2000-03Chapter 14 – Exterior WallsChapter 21 – Masonry AAMA 508-05 Test For Rainscreen Cladding Systems Compliance with Code Provisions

Slide 7: 

The Evolution of the Wall

Slide 8: 

Walls for weather protection

Slide 9: 

Walls for weather protection Early rainscreen Terra cotta shingles Eaves Vertical cedar veneer Water tables

Slide 10: 

Cavity Wall with Air Space Drawbacks: Drafty wall cavity Condensation Shortens life of mortar due to freeze/ thaw cycle Efflorescence Walls for Comfort & Heat

Slide 11: 

Insulation added (circa 1960) Drawbacks: Introduction of condensation Need for vents and weeps Walls for Comfort & Heat

Slide 12: 

Cavity Wall with Air Space and Insulation Drawbacks: Water infiltration Air

Slide 13: 

Fully Sealed Wall Drawbacks: Lack of adequate ventilation Wall failure in ten years or less Walls for Energy Efficiency

Slide 14: 

Design Principles & Objectives

Slide 15: 

Structural Wall Air/ Vapor Barrier Insulation Wall Cavity Rainscreen (Veneer) Plane Identification

Slide 16: 

Kinetic Moisture Infiltration

Slide 17: 

Surface Tension Moisture Infiltration

Slide 18: 

Gravity Moisture Infiltration

Slide 19: 

Capillary Moisture Infiltration

Slide 20: 

P1a P1b P2 Structural Wall Air/ Vapor Barrier Insulation Wall Cavity Rainscreen (Veneer) P1 P2

Slide 21: 

P1 Back ventilation Drainage allowance Easy access Aesthetics Open Joint P1

Slide 22: 

Controls air flow: Vertical Wind Heat Horizontal Wind Compartmentalization

Slide 23: 

How can energy efficiency be obtained and walls kept adequately ventilated? Rainscreen.

Slide 24: 

Build from the inside out Achieve insulation continuity Key Points for Wall Success

Slide 25: 

Related Interfaces

Slide 26: 

Products don’t fail. Interfaces do.

Slide 27: 

Continuity at Structural Interfaces Roofs Floors Walls Beams Columns

Slide 29: 

Continuity at Wall Openings Windows Louvers Doors Soffits

Slide 30: 

Structural Wall(Precast) Air/Vapor Barrier Silicone Sealant Joints (Continuity of Air/Vapor Barrier) Anchor Devices for Veneer Air/Vapor Barrier Membrane around Window

Slide 31: 

Membrane ApplicationAround Windows Localized membrane application required. Material to be installed in a shingling fashion.

Slide 32: 

Membrane ApplicationAround Windows Membrane must properly interface with window or curtainwall framing materials Termination bar

Slide 33: 

Membrane ApplicationAround Windows Apply termination bar & sealant to the exposed top edge of all membranes

Slide 34: 

Exterior Applied Insulation

Slide 35: 

Stud Cavity Application

Slide 36: 

Continuity in Insulation Mechanical fastening of insulation Lateral anchor assembly Precast substrate

Slide 37: 

Anchorage of Rainscreen to Primary Structure

Slide 38: 

Movement Differentials Floor to Floor Roof to Floor Deflection - Cause and Magnitude Live Load Dead Load

Slide 39: 

Gravity Load to Floors

Slide 40: 

Gravity Load to Base

Slide 41: 

Rainscreen Support Elements

Slide 42: 

Strongback frame Tracks (vertical) Girts (horizontal) Baffles (vertical & horizontal) Stiffeners (If required)

Slide 43: 

“Unitized” Stone on Strongback

Slide 44: 

Features and Benefits

Slide 45: 

Longevity 100+ Year Service Life No Dependence Upon Wet Applied Sealants

Slide 46: 

Constructability Allows code-compliant construction Unobstructed plane and access Air-barrier continuity Unitized assembly options

Slide 47: 

Thermal Performance Structural wall heat-sink balance Continuity of air barrier Full usage of insulation R-value

Slide 48: 

Aesthetics Various Cladding Materials Clean Straight Divisions No sealant bleed or visual distraction Pre-Engineered Wall Assembly Facilitates field quality control

Slide 49: 

Rainscreen Cladding Material Stone Metal Ceramics Terra cotta Glass RHEINZINK Recycled or manmade materials

Slide 50: 

Leavitt Center for University Advancement

Slide 51: 

Employers Mutual Company Headquarters

Slide 52: 

“We heat and cool our 437,000 square foot office building for the same money as our 1972 building which has 191,000 square feet. The new building has exterior applied insulation, a precast air barrier, and an aluminum panel rainscreen...” Harold Capps, Real Estate Manager Employers Mutual Companies Proven Results

Slide 53: 

Ventura College

Slide 54: 

Significant long-term cost savings No sealants to replace Decreased capacity of mechanical systems needed – zero air-infiltration (as identified in ASHRAE guidelines)

Slide 55: 

Physical Properties of Rainscreen Materials Co-efficient of expansion Density Size limitations

Slide 56: 

ENGINEERED FAÇADE SYSTEMS POHL RAINSCREEN METAL PANEL SYSTEMS POHL RAINSCREEN TERRACOTTA SYSTEMS POHL RAINSCREEN GLAZING SYSTEMS

Slide 57: 

References The Construction Specifier Feb. 2000 and November 2005 Articles: Rain Screen Cladding, Air Barriers, and Curtain Walls Guidelines for Glazing Selection in Commercial Buildings Windows, Walls and Water

Slide 58: 

References Rainscreen Cladding A guide to design principles and practice

Slide 59: 

Special thanks to WJ Higgins & Associates