Learning Objectives Page 41 Mold amp Moisture Health Effects Upper respiratory tract symptoms Coughing Wheezing Asthma symptoms Hypersensitivity pneumonitis Page 41 Page 41 Does water drain ID: 637923
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Slide1
Keep it dry
Steps to Healthier HomesSlide2
Learning Objectives
Page
4.1Slide3
Mold & Moisture Health Effects
Upper respiratory tract symptomsCoughingWheezing
Asthma symptoms
Hypersensitivity
pneumonitis
Page
4.1Slide4
Page
4.1
Does water drain
AWAY
from the house?Slide5
Moisture Sources
Poorly managed rainwater/groundwaterPlumbing leaksCondensation on surfaceConstruction moisture
Page
4.2Slide6
Interior Water Leakage
Page
4.2
Sources of interior water leakage, 2011 American Housing Survey
8.5 %
Interior Water Leak
Source of interior leak
%
among total
# of units
Leaking pipes
3.6%
Fixtures
1.9%
Broken
water heater
0.8%
Other or unknown
2.4%Slide7
Exterior Water Leakage
Page
4.2
Sources of exterior water leakage, 2011 American Housing Survey
11%
Exterior Water
Leak
Source of exterior leak
%
among total
# of units
Roof
5.7%
Basement
2.8%
Walls/windows/doors
2.2%
Other/unknown
1.2%Slide8
Construction Factors-Basement
Page
4.3
8
For Single Family Homes (excluding mobile homes) 2011 American Housing SurveySlide9
Exterior Physical Condition
Page
4.3
Occupied housing units, 2011 American Housing Survey
18%
One or More Exterior Problem
Exterior
condition
%
among total
# of units
Foundation
crumbling/crack/hole
5.4%
Broken windows
4.2%
Missing roofing material
3.6%
Missing outside wall material
2.5%
Sagging roof
2.0%
Hole in roof
1.5%
Sloping outside walls
1.2%
Boarded up windows
1.0%Slide10
Comfort Levels
Page
4.3Slide11
Page
4.4
How Water Enters a Building
Leaks
(liquid)
Cooking
Bathing
Watering Plants
Breathing
Washing
(water vapor)
Surface water
(liquid)
Air from soil
(water vapor)
Groundwater
(liquid)Slide12
Page
4.4
Stop Liquid Water Entry First
Flashing and gutters
Slope
DrainageSlide13
Step Flashing
Page
4.5
Copyright 2006, Livable Housing, Inc. All rights reserved.Slide14
Page
4.5Slide15
Retrofit rainwater protection
Page
4.6Slide16
Windows
leak
?Slide17
Clues on the outside shape your indoor inspection
Page
4.6
Masonry + rain & sun + air conditioning + vinyl wallpaper
= moldSlide18
Air conditioner condensate drains into building
Page
4.7Slide19
Porous material can wick water from outside
Page
4.7Slide20
Page
4.8Slide21
Below
grade
Ground slopes toward houseSlide22
Page
4.9Slide23
Moisture meters
Is material wet? Source of water?
Page
4.10Slide24
Page
4.10
Bad CrawlspaceSlide25
Good Sealed Crawlspace
Page
4.11Slide26
Failed drainage
systems
Page
4.11Slide27
Floor
Duct bottom
Looking
down
Page
4.12Slide28
Are there floor drains?
A dehumidifier?
Page
4.12Slide29
Steps to Dry Basements
Drain, drain, drainNo paper or wooden materials in contact with foundationKeep warm humid air away from earth chilled surfaces
Dehumidify
Page
4.12Slide30
Plumbing
problems
Page
4.13Slide31
Page
4.13Slide32
Page
4.13
Drain pan in the event of heater leak Slide33
Leaky refrigerator drip pan causes mold
Page
4.14Slide34
If humidity levels are greater than 95% for three to six weeks…
Vacuum bag with
mold
Page
4.14Slide35
Page
4.15Slide36
Mold can grow where we cannot see it
Bottom of toilet tank
Page
4.15Slide37
Page
4.16
Mold in the air conditioner?Slide38
Mold due to poor insulation or wind blowing through insulation.
Mold around window where there is no insulation.
Page
4.16
Condensation when cold outsideSlide39
Page
4.17Slide40
Page
4.17
Unsealable
recessed light allows warm, moist air into the unheated attic.Slide41
DEHUMIDIFIERS
Wattage
(
Energy Star rated)
Water removal rate
Noise
Drainage
Icing
Filter
Page
4.18Slide42
Response to Mold Problems
Page
4.18
42Slide43
South
roof
Page
4.19
North
roofSlide44
Cleaned with HEPA vacuum
Page
4.19Slide45
Page
4.20
For areas less than 10 square feet - clean it upSlide46
Page
4.20Slide47
For Bigger Jobs
Page
4.21Slide48
Containment may be needed for bigger jobs. See EPA Guidance.
Page
4.21Slide49
Code Requirements Related to Moisture
302.2 Grading and drainage. 304.7 Roofs and drainage.
304.6 Exterior walls
304.2 Protective treatment
Page
4.22
49Slide50
Key Messages
Excess moisture creates conditions that can affect health.
Moisture in the home comes from inside and outside.
Excess moisture in the home should be prevented through appropriate construction methods and plumbing systems, temperature control, ventilation and proper maintenance.
Page
4.22
50Slide51
Learning Objectives
Page
4.22