FMA / AAMA / WDMA Installation Committee Update. Jim Katsaros / DuPont Building Innovations FMA Installation Committee April 24, 2012

Transcription

1 FMA / AAMA / WDMA Installation Committee Update Jim Katsaros / DuPont Building Innovations FMA Installation Committee April 24, 2012

2 Topics for discussion. Review & Update on FMA/AAMA/WDMA Window & Door Installation Standard Practices Initiation of Exterior Rigid Foam Insulation (ERFI) Guideline Initiation of Replacement Window Guideline

3 FMA/AAMA/WDMA Installation Committee Background: Formed by FMA in 2005 (after extreme 2004 Hurricane season) to address fenestration water intrusion concerns with residential construction in the southeast region AAMA and WDMA joined document development and ballot review process Developing robust, easy to follow (something that could be given to an installer) illustrated installation standard practices for specific window/door/wall system combinations Representative installations have been wall tested per ASTM E547 to 12 psf water pressure Guidelines have been adopted into Florida Building Code and expected to become part of ASTM E2112 regional matrix, for extreme exposure and southeast / CMU walls

4 FMA/AAMA/WDMA Installation Committee Background: Window & Door Standard Practices organized into Four Series: FMA/AAMA 100: Windows in Wood Frame Construction FMA/AAMA 200 & FMA/WDMA 250: Windows in Surface Barrier CMU Walls FMA/AAMA/WDMA 300: Doors in Wood Frame Construction FMA/AAMA/WDMA 400: Doors in Surface Barrier CMU

5 FMA / AAMA Windows in Wood Frame Wall System Specific for extreme exposure on water sensitive (wood) framing materials Document under revision to upgrade WRB wrap methods (per 300), sealant guidelines (per 200) and enhanced illustrations

6 FMA / AAMA 200 & FMA / WDMA 250 Surface Barrier / Direct applied Stucco onto CMU Wall

7 Surface Barrier CMU Wall System Water Management Strategy: 1) Use the storage capacity of masonry wall to contain moisture 2) Excess moisture drained out the bottom of the wall 3) Rely on HVAC to handle inward driven moisture from hot/humid climate 4) Fill cracks / joints with paint / sealant (need to do this at least twice)

8 The Concrete Block (Mass) Wall Mass Wall is Highly Water Absorptive When moisture capacity exceeded (i.e. heavy rain / hurricane seasons or internal wall leak), excess moisture drains inside the wall and eventually is directed to exterior at bottom (if properly flashed) However, wall openings (i.e. windows & doors) intersect drainage path results in appearance of Fenestration Leak at rough opening Fenestration Manufacturer blamed for window leak Fenestration Manufacturers can t fix the wall, but need to own the rough opening

9 FMA/AAMA/WDMA Installation Principle: Protect the Rough Opening Installation Committee developed guidelines designed to protect the rough opening by use of Liquid Applied Flashing Deflects moisture to drainage plane within mass wall Interior wall AAMA Liquid Applied Flashing specification / to be referenced in FMA installation documents Potential Concerns: stucco bond durability with external application of Liquid Applied Flashing Documents being revised to include enhanced illustrations & address concerns

10 FMA / AAMA /WDMA Door Installation Standards FMA/AAMA/WDMA 300-XX Standard Practice for the Installation of Exterior Doors in Wood Frame Construction for Extreme Wind / Water Exposure Includes: methods for mounting flange, exterior casing (brick mold), and box frame / non-flanged attachment systems wood, concrete flat, and concrete recessed flooring provision to seal WRB to / around rough opening in order to prevent water intrusion from under the WRB migrating into the RO (per wall test results with vinyl siding lots of fastener holes) Wall Testing Completed in 2010 New Upgraded Illustrations! FMA/AAMA/WDMA joint ballot nearly complete!

11 FMA / AAMA /WDMA Door Installation Standards FMA/AAMA/WDMA 400-XX - Standard Practice for the Installation of Exterior Doors in Surface Barrier Masonry Construction for Extreme Wind/Water Conditions first draft Includes methods for: mounting flange, exterior casing (brick mold), and box frame / non-flanged attachment systems concrete flat, and concrete recessed flooring / sill systems (not wood) Wall testing completed May, 2011 Working on document draft.with illustrations

12 FMA Installation Standards Overview Document Fenestration Wall System Status (more details to follow) FMA / AAMA FMA / AAMA Flanged or Mounting Fins (Wood, Al, or Vinyl) Frontal Flanged (Aluminum and Vinyl) Wood Frame Surface Barrier CMU In the process of republishing thru AAMA / updated to reflect new WRB wrap learning's and enhanced illustrations (in line with 300). Published in 2009 revision with enhanced illustrations being developed FMA / WDMA Non-frontal flanged (Wood) Surface Barrier CMU Published in 2010 revision with enhanced illustrations being developed FMA / AAMA / WDMA 300 Exterior Doors with mounting fins, brick mold, and box frame Wood Frame Completed several ballots with enhanced illustrations should be ready to publish 2Q12 FMA / AAMA / WDMA 400 Exterior Doors with mounting fins, brick mold, and box frame Surface Barrier CMU Initial draft complete / testing complete on six representative installations (2011) creating illustrations

13 New Focus Area Energy Management Proper Integration of Exterior Rigid Foam Insulation (ERFI) / Window / Building Envelope

14 2012 IECC: Changes to the Energy Code - Wall Systems Mandates substantial increase in wall insulation requirements (R-Value), particularly in northern climate zones This can be achieved either by using: 2x6 construction with traditional interior cavity insulation (R20) or 2x4 with Exterior Insulation (R13+5), commonly achieved with rigid foam board insulation

15 Integration of Windows and Doors with Exterior Rigid Foam Insulation Key Application Concerns: Structural Attachment to Support the Windows Maintaining Water Management Principles (integration with Building Envelope / WRB) Finishing Details with the Façade / Siding

16 FMA/AAMA/WDMA Exterior Rigid Foam Insulation Standard Practice Initial meeting April 4-5 in Orlando with ~25 participants FMA/AAMA/WDMA - XXX Standard Practice for the Installation of Exterior Windows with Exterior Rigid Foam Insulation Foreword: This standard practice encompasses procedures for the installation of exterior windows with exterior rigid foam insulation to address energy code requirements for continuous insulation; and addresses window installations for residential and light commercial buildings of not more than three stories above grade in height. This standard practice is to address: best practices for structural attachment and support of windows; water management principles; and finishing details for windows installed with foam insulation. Thermal performance has been taken into consideration when developing best practices but final thermal performance of the installation is outside the scope of this document. The exterior rigid foam insulation as referred to in this practice is being utilized for its thermal value, and not as a primary drainage plane or weather resistive barrier.

17 FMA/AAMA/WDMA Exterior Rigid Foam Insulation Standard Practice Configuring 6 Different Installation Sequences: RFA 1 & 2 - Flange in plane with exterior face of sheathing, WRB under foam, install window before or after WRB RFBO 1 & 2 - Window flange is in plane with buck frame, WRB over foam, install window before or after WRB RFBU 1 & 2 - Window flange is in plane with buck frame, WRB is under foam, install window before or after WRB RFA-1 RFBO-1

18 FMA/AAMA/WDMA Exterior Rigid Foam Insulation Standard Practice Status & Plan: Still working on initial draft conference call scheduled for 6/17 to address follow up items (let me know if you d like to participate!) Putting together plan for wall testing of the 6 configurations likely this summer.

19 Next Focus Area.. Replacement Windows (Dennis Chappel to lead) The vast majority of window installations in current market (80%?) Methods do not follow water management / building envelope integration principles that are required for new construction Why? How do you integrate with a Building Envelope behind the façade? Is there a reliable drainage plane / WRB there anyway? Thus, need through-cavity system.

20 Any Questions?

21

22