Upcoming Courses.

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1 Upcoming Courses Commercial courses November 11, 2015 LEDs: technology, controls and costs Green Bay, WI Residential courses November 3, 4 and 5 Problem free basements, crawlspaces and attics in new homes Green Bay, Minocqua, La Crosse March 2-4, 2016 Wisconsin Better Buildings: Better Business Conference Live and on-demand webinars December 1 Live webinar VRF system optimization December 2 Live webinar Evolving Wisconsin s home construction practices: with or without code

2 COPYRIGHT 2015 by Seventhwave All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in any form or means: electronic, mechanical, photocopying, recording, or otherwise, without written permission from: Seventhwave 749 University Row, Suite 320 Madison, WI Attn: Professional Education Department For information on reproduction, purchase or borrowing of this material, please contact Seventhwave at the above address or call

3 Problem free basements, crawlspaces and attics in new homes Presenter: Joe Nagan November 3, 2015 in Green Bay November 4, 2015 in Minocqua November 5, 2015 in La Crosse Seventhwave G175 Problem free basements, crawlspaces and attics in new homes RES321 Joe Nagan 11/3/ /4/ /5/2015 Credit(s) earned on completion of this course will be reported to AIA CES for AIA members. Certificates of Completion for both AIA members and non-aia members are available upon request. This course is registered with AIA CES for continuing professional education. As such, it does not include content that may be deemed or construed to be an approval or endorsement by the AIA of any material of construction or any method or manner of handling, using, distributing, or dealing in any material or product. Questions related to specific materials, methods, and services will be addressed at the conclusion of this presentation.

4 Course Description When there are home comfort, moisture or mold problems in basements, crawlspaces and attics they can be a hassle to solve after a home is built. How do you get to the root causes of such problems at the time of construction? Join Joe to find out. Learning Objectives At the end of the this course, participants will be able to: DISTINGUISH between code and best practices related to managing moisture and energy in basements, crawlspaces and attics EXPLAIN why managing moisture and energy with equal intensity is a necessity DISCUSS basement slab insulation installation best practices and applications CONTRAST the construction details of a basement and crawlspace EXPLAIN how to prevent wet attic problems and enhance roof system performance Problem free basements, crawlspaces and attics in new homes Approved for: 3.5 General CE hours by Seventhwave GBCI cannot guarantee that course sessions will be delivered to you as submitted to GBCI. However, any course found to be in violation of the standards of the program, or otherwise contrary to the mission of GBCI, shall be removed. Your course evaluations will help us uphold these standards.. Approval date: 09/23/2015 Course ID: '

5 Basements, Crawl Spaces & Attics Insulation options & moisture control Detailing for PERFORMANCE: Presented by: Joe Nagan Home Building Technology Services Kaukauna, Wisconsin House as a SYSTEM

6 House as a SYSTEM BUILDING SCIENCE : what s this? knowledge acquired by careful observation, by deduction of the laws which govern changes and conditions, and by testing these deductions by experiment ~ a branch of study, especially one concerned with facts, principles and methods Reference: Webster school, home & office edition 1995 In other words: The study of buildings Resources available from Energy & Environmental Building Alliance (952) phone (952) fax

7 Guidelines I try and follow: 1. Make decisions based on good building science 2. Get information from proven reliable sources 3. Trust your experience but ask questions 4. If uncertain, bounce an idea off of a colleague FINALLY: no matter what: Don t do anything CORNBALL Be comfortable with your decisions Basements & Crawl Space Insulation & moisture control Detailing for PERFORMANCE: Presented by: Joe Nagan Home Building Technology Services Kaukauna, Wisconsin jnagan@wildblue.net

8 Wisconsin Uniform Dwelling Code 2009 INSULATION Reference values Foundation INSULATION issues Exterior options & concerns 18

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12 Foundation INSULATION issues Interior insulating options for rim and walls Moisture and/or surface temperature control

13 REMOVE HEAT expose to moisture! = sweating

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15 Control condensation by raising the surface temperature! (water pipe)

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19 2 exterior + 2 interior spray?

20 Box sill issues & options

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22 Knee-wall issues & options 60

23 Lower level knee-walls 61 Not good enough! Kneewall / foundation combo: all spray foam

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26 COMM Vapor-retarders

27 74 75 Radiant slab floor heating Insulation placement & R values Detailing for PERFORMANCE: Presented by: Joe Nagan Home Building Technology Services Kaukauna, Wisconsin jnagan@wildblue.net

28 CHAPTER COMM SPS 322 Issues slab & heated slab insulation Wisconsin MANDATORY SLAB INSULATION REQUIREMENTS!

29 REScheck compliance software or newer All slab edges 81 Un-heated slab edge

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32 Need to get details on the construction drawings! Walkout slab w/brickledge & interior insulation Pan project DePere: vertical foam at 45 degrees

33 Lower level walkout slab detailing (radiant project shown)

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35 Basement radiant in-floor details

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39 Foundation MOISTURE issues Sources Removal options

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49 115 cfm x 60 x 24 = 165,600 cfm every 24 hours! Vented Attics & Ventilation Air & moisture control (?) Detailing for PERFORMANCE: Presented by: Joe Nagan Home Building Technology Services Kaukauna, Wisconsin jnagan@wildblue.net

50 What are the issues? Customers usually don t like wet attics Good only if you were not the cause (repair or new) Really bad if you were! Good for business if you can solve the problem Make sure you know what you re doing 143 Where did this come from? Roof sheathing condensation/frost?

51 THE Question is: How effective is conventional attic ventilation in controlling moisture problems in a vented attic Moisture movement direction: more to less warm to cold Moisture movement can be controlled by: reducing the amount of moisture reducing the temperature difference? install a retarder and/or barrier Vapor pressure 148

52 Controlling natural forces 149 Building durability issues: How significant is air sealing How significant is a vapor-retarder Which is more important? What do you think?

53 DIFFUSION DIFFUSION = DIFFUSION DIFFUSION DIFFUSION 1/3 quart of water Test Period was one Cold Climate Heating Season DIFFUSION 4x8 sheet of gypsum board Interior at 70º F and 40% RH Source: Lstiburek, J Builder s Guide to Cold Climates. Building Science Corporation 4x8 sheet of gypsum board Interior at 70º F and 40% RH AIR LEAKAGE = 30 quarts of water Air Leakage 1 square hole 1 sq/in hole Lstiburek, J Builder s Guide to Cold Climates. Building Science Corporation House as a SYSTEM

54 House as a SYSTEM Ceiling or LID issues Look UP : that s where the PRESSURE is greatest during the heating season. Seal the holes with the most pressure Make sure you seal all the holes Any questions?

55 4x8 sheet of gypsum board Interior at 70º F and 40% RH AIR LEAKAGE = 30 quarts of water Air Leakage 1 square hole 1 sq/in hole Lstiburek, J Builder s Guide to Cold Climates. Building Science Corporation Lots of holes everywhere! ¾ -1 square hole around each box! Lots of holes in the ceiling plane! Junction boxes for lighting/fans

56 Lots of holes in the ceiling plane! Bath fans and air-registers Lots of holes in the ceiling plane! Recessed IC Rated lights

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58 Tub/shower detailing Shower stall detailing at ceiling Shower stall detailing at ceiling

59 Rock the lid before framing? Connected to attic? Fireplace chase detailing Great detailing

60 Architectural features-concerns? House connected directly to the attic! Architectural inside corners

61 Attic FRAMING RELATED air sealing issues: There are hundreds of running feet of gaps in an average attic lid Seal all of them Multiple materials can be used Spray foam is a practical choice as it can be used for many purposes in an attic Interior top-plate leakage

62 Exterior top-plate leakage No air seal here to interior walls!

63 182 Top-plate leakage* during Blower-Door testing Bull nose corner Bull nose corner trim

64 Perimeter drywall has no air seal either! Top-plate leakage-exterior* walls

65 Attic air-seal package 189 Install full-width vent chute & snuff under

66 Spray foam entire exterior perimeter Finish air sealing by spraying all top plates 193

67 194 Open knee-walls need to be air tight 195 Spray foam works great! 196

68 197 Spray foam can be used to seal ductwork! Cat-walk built in for access 199

69 Interior attic access hole details SUMMARY control airflow through and into building assemblies: control surface temps where possible provide home owner with adequate moisture control: tested ventilation for spot and whole house control evaluate your building practices regularly

70 FINAL TESTING on every home Blower door-building shell tightness (new & existing homes) Ventilation airflow- (new & existing homes) Thermal imaging Duct testing Combustion safety- where natural draft appliances are present THANK YOU! Questions?