Friday, June 29, 2012

2012 IgCC Codes


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Technical Service Advisory - 2012 IgCC Codes - Impact on Exterior Veneer Applications
The newly released 2012 International Green Construction Codes (IgCC) include new energy conservation requirements that will impact the installation and specification of exterior adhered tile & stone veneers.

Chapter 6 – Energy Conservation, Efficiency and CO2e Emission Reduction covers the requirements to create a more energy efficient building envelope. The area that affects direct adhered tile or stone veneers is as follows:
Air leakage – the use of LATICRETE Waterproofing Membranes (LATICRETE® Hydro Ban, LATICRETE 9235 Waterproofing Membrane and LATICRETE Air & Water Barrier) can be used to effectively reduce air leakage in building envelopes.

Appendix A – Normative Appendix A (ANSI/ASHRAE/IES Standard 90.1) – Prescriptive Building Envelope Tables – these tables include the minimum R value requirements for various wall constructs (both residential and commercial) to demonstrate compliance with the new energy codes.

Appendix B – Normative Appendix B – Prescriptive Continuous Air Barrier – Building Materials that demonstrate compliance with these requirements must have an air permeability not to exceed 0.004 cfm/ft2 under a pressure differential of 0.3 in. water (1.57 lb. /ft2) [0.02L/s.m2 under a pressure differential of 75 Pa]  when tested in accord with ASTM E2178.
LATICRETE Hydro Ban and LATICRETE Air & Water Barrier pass this requirement.

With these new requirements potentially in play for adhered exterior veneer projects; please closely examine the images above of two of several exterior veneer options that include a layer of rigid foam insulation which in many cases would satisfy the energy requirement. However, bear in mind that the project design professional / engineer must make the final R-value contributions, total energy calculation and decide how to incorporate the various building envelope materials into the design of the veneer system.

Have  questions or concerns on this subject or like to discuss your tile or stone installation ?  Call our technical support team +1 (203) 393-0010 x 235 or send us an email: techservice@laticrete.com
 

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