LESSONS LEARNED FROM THE TRENCHES - CRAWL SPACES. David Treleven

Transcription

1 LESSONS LEARNED FROM THE TRENCHES - CRAWL SPACES David Treleven

2

3 AGENDA 1. Background 2. Exercise 3. Field Experiences 4. Take Aways

4

5 SystemVision Standards Air Tightness Ventilation & Moisture Management Insulation & Windows HVAC Sizing & Install Pressure Balancing Appliance & Fixtures Combustion Safety

6 What is a Closed Crawlspace? Vapor Retarder Insulation Drying Mechanism Drainage Air Sealing

7 What is a Closed Crawlspace? Drainage Air Sealing Vapor Retarder Insulation Drying Mechanism

8 Benefits in NC?

9 Energy Savings Thousands Season Summer Closed with Floor Insulated -22 % Closed with Wall Insulated -36% kwh 5 4 Fall -5 % -10% 3 2 Winter -10% +4% 1 0 Spring -19% -28% Jun-Aug '03 Sep-Nov '03 Dec '03-Feb '04 Mar-May '04 Annual -15% -18% Vented + R-19 Floor Closed + R-19 Floor Closed + 2'' Foam on Wall

10 Moisture Control Outside Wall Vented Closed 80 Relative Humidity (%) Jun-03 Jul-03 Aug-03 Aug-03 Sep-03 Oct-03 Nov-03 Dec-03 Jan-04 Feb-04 Mar-04 Apr-04

11 Closed Crawlspace Standard 2.6. All crawlspaces shall be closed in accordance with

12 Closed Crawl Designs

13 SV Builders Initial Reactions Slab only (3 builders) Dropped program (1 builder) Skeptical of Closed Crawls Excited to see this as a requirement

14 What SystemVision Provided ½ Trainings on Closed Crawlspaces Suggestions for materials Proposed a process Linked Builders Sent out Closed Crawl Books Technical Support Phone Onsite Blog

15 What are builders experiencing?

16 Closed Crawl Lego Land Your Goal: Build a closed crawl space incorporating all essential elements

17 Closed Crawl Lego Land Do not open envelopes until you are prompted Be gentle when putting together legos Do not build unless you are told to

18 Step 1 Build the Foundation

19 What is a Closed Crawlspace? Drainage Air Sealing Vapor Retarder Insulation Drying Mechanism

20 Build a Closed Crawl See what your team can get done in the next 3 minutes

21 Challenges

22 SystemVision Builder A Only knowledge is of D.A.V.I.D.

23 Open hint #1 in your bag

24 Build a Closed Crawl See what you team can get done in the next 3 minutes

25 Hint #1: Materials List Air Sealing Vapor Retarder Insulation Sill Seal Wall & Floor Rigid Foam Drying Mechanism Drainage Stand Alone Dehumidifier Floor Drain

26 Challenges

27 SystemVision Builder B Only knowledge is of D.A.V.I.D. Materials selected prior to construction

28 Open Hint #2 in your bag

29 Build a Closed Crawl See what you team can get done in the next 3 minutes

30 Hint #2 The Process

31 Challenges

32 SystemVision Builder C Only knowledge is of D.A.V.I.D. Good grasp on what Materials to use Well integrated Closed Crawl Process

33 Wake HFH Closed Crawls

34 SystemVision Builders A Basic Knowledge- D.A.V.I.D. B Trained D.A.V.I.D. & Materials C Process, Materials, D.A.V.I.D. D Subcontracted out

35 Envelope #3

36 Issues from the Field Issues not covered by the controlled lego land exercise

37 Other Issues MISSING

38 Other Issues MISSING

39 Other Issues MISSING

40 Other Issues

41 Other Issues

42 Other Issues

43 Other Issues

44 Other Issues Recap Missing inside drainage Crawl door is not air tight Crawl not separated from porch Pre-closing moisture issues Missing drying mechanism Incorrectly installed floor insulation No termite inspection gap

45 Success

46 Success

47 Success

48 Success

49 Success

50 Success

51 Success

52 Common SV Closed Crawl Drainage Drain to daylight Air Sealing Components Foam/caulk & sill seal Vapor Retarder 6-8 mil poly sealed with flashing tape/house wrap tape

53 Common SV Closed Crawl Components Insulation Fiberglass batts / Thermax Drying Mechanism Supply

54 Typical Cost Self-performed $0.50 to $1.00/SF 1200SF Crawlspace= $600-$1200 Subcontracted Out $2.00 to $2.25/SF 1200SF Crawlspace= $ $2700 Cost Includes Insulation

55 Take Aways for Success All components of D.A.V.I.D are selected prior to construction Materials/Tools identified prior to construciton Integration into construction process = success

56 SystemVision Builders A Basic Knowledge- D.A.V.I.D. B Trained D.A.V.I.D. & Materials C Process, Materials, D.A.V.I.D.

57 Advanced Energy 2011 All rights reserved Questions?

58 THANK YOU David Treleven Maria Mauceri Closed Crawlspace Research