Dew technology centre_ppt_presentation_web_final

Basement Moisture Conditions, Their Cause andBasement Moisture Conditions, Their Cause and
Associated Damages are Creating Unfavorable ConditionsAssociated Damages are Creating Unfavorable Conditions
for Living Spaces. Improvement in Building Envelopefor Living Spaces. Improvement in Building Envelope
Requirements has Demanded Better Systems of ProtectionRequirements has Demanded Better Systems of Protection
for Below Grade Construction.for Below Grade Construction.
We will take a look at these Conditions, and someWe will take a look at these Conditions, and some
Advanced Materials that have Improved The BuildingAdvanced Materials that have Improved The Building
Envelope Construction over Traditional Materials andEnvelope Construction over Traditional Materials and
Methods.Methods.
DEW TECHNOLOGY CENTRE- 2010

Moisture Problems – Major Causes of Below Grade Moisture EntryMoisture Problems – Major Causes of Below Grade Moisture Entry
Concrete cracks - Cracks in a foundation walls of concrete or masonry compromises the
structures ability to provide a barrier to water/moisture entry. Causes of cracks are settlement,
expansive soils, frost, shrinkage due to natural process of concrete curing.
Hydrostatic Pressure – Ground water pressure build up that exerts lateral and vertical
pressures on the foundation structure
Capillary Action – The movement of liquid moisture through a structure or substrate
(concrete) using voids and fissures in the material acting as a path for water travel
Vapor Transmission – The movement of air borne moisture through a structure or substrate
due to vapor pressure equalization (high concentration to low concentration)
Condensation – The formation of liquid moisture on or within a structure or substrate due to
the airborne moisture concentration and temperature conditions being ideal for water to form

Let’s take a look at these Five Major Causes of Moisture Entry into BasementsLet’s take a look at these Five Major Causes of Moisture Entry into Basements
Capillary Action
Concrete Capillaries
Water
Pocket
Minimal Wall Protection
Water Intrusion
Capillary Development
Foundation Wall
Capillaries

Water
Pocket
Let’s take a look at how these Five Major Causes Affect Your BasementsLet’s take a look at how these Five Major Causes Affect Your Basements
Capillary Action
Insulation/Vapor Barrier
Saturated Wall Assembly
Mold & Mildew
Dampness on Floor
Moisture infiltration results in – Unhealthy Air + Dampness + Wall Assembly Damage

Let’s take a look at these Five Major Causes of Moisture Entry into BasementsLet’s take a look at these Five Major Causes of Moisture Entry into Basements
Vapor Transmission
65% RH
45% RH
RH = Relative Humidity
Water
Vapor
55% RH
Water Vapor

Let’s Review some Major Reasons for Defects in Foundation WallsLet’s Review some Major Reasons for Defects in Foundation Walls
Foundation/Soil Settlement Concrete Shrinkage
Construction Joints
Below Grade Services
Improper Grading

Traditional Materials and Application Methods toTraditional Materials and Application Methods to
Waterproof Foundations as a Stand Alone ProtectionWaterproof Foundations as a Stand Alone Protection
System are being Replaced or Complemented by NewerSystem are being Replaced or Complemented by Newer
more Reliable Materials and Systems.more Reliable Materials and Systems.
Building Codes are taking notice of their Success andBuilding Codes are taking notice of their Success and
Endorses Their Use with Recognition of Third PartyEndorses Their Use with Recognition of Third Party
Product Testing, Assessments and Approvals. ThisProduct Testing, Assessments and Approvals. This
Presentation will look at Two of the More Popular SystemsPresentation will look at Two of the More Popular Systems
being used in Construction Today.being used in Construction Today.

Advantages of Using Plastic Dimple Sheet & GeocompositeAdvantages of Using Plastic Dimple Sheet & Geocomposite
Drainage Products to Control Ground Moisture Migration, andDrainage Products to Control Ground Moisture Migration, and
Water Damage with the Potential to Reduce or Eliminate theWater Damage with the Potential to Reduce or Eliminate the
formation of Mould and Mildew in Basements.formation of Mould and Mildew in Basements.

How can Dimple Sheet Waterproofing Protect you from Water DamageHow can Dimple Sheet Waterproofing Protect you from Water Damage
Concrete Foundation Wall Cracks
Basement
Interior
Water
Pocket
Water
Pocket
Dimple Sheet bridges cracks in foundation walls to
continue protecting your home and family even after a
crack develops.
Structural Crack
Crack
Dimple Sheet

Water
Pocket
Dimple Sheet
Capillary Break (Stop)
Water
Pocket
Dimple Sheet
Capillary Break
Foundation
Basement
Interior

Water
65% RH
Vapor
Dimple Sheet
Vapor Transmission
Water
Vapor
Dimple Sheet for
Under Slab
Water Vapor
Dimple Sheet Vapor Retarder
Foundation
45% RH
RH = Relative Humidity
Interior

Soil
Temperature
37° F Soil
Temp.
37° F
Interior
Temperature
68° F
DEW Point
DEW Point
Condensation
Air Gap
Dimple Sheet
Foundation
Air Gap assists to reduce interior
condensation on foundation walls by
creating moderated air flow between
Dimple Sheet and foundation wall
Moderated Air
Dimple Sheet

Technologically Advanced Drainage Solutions over Traditional Drainage SystemsTechnologically Advanced Drainage Solutions over Traditional Drainage Systems
Don’t Let Ground Water and Hydrostatic Pressure Stop You From Enjoying Your HomeDon’t Let Ground Water and Hydrostatic Pressure Stop You From Enjoying Your Home

Conditions When You Should Consider UsingConditions When You Should Consider Using Composite DrainsComposite Drains
 Hill Side Construction
 High Ground Water Table (with mechanical pumping system)
 Perched Water Table
 Poor Draining Soils (Clay & Silt)
 Building in Flood Plain areas (with mechanical pumping system)
 Building near steep up sloped lands

Hydrostatic Pressure – What Affects it has on Your FoundationHydrostatic Pressure – What Affects it has on Your Foundation
Wall Deflection
Lateral Stresses
Stress Cracks and
Floor Slab Uplift
Hydrostatic
Pressure
Hydrostatic
Pressure
Hydrostatic
Pressure
Wall
Crack
Basement Floor
Foundation
Wall
Foundation
Wall

Let’s see why Hydrostatic Pressure is a Cause of Moisture Entry into BasementsLet’s see why Hydrostatic Pressure is a Cause of Moisture Entry into Basements
Water
Pocket
Hydrostatic Pressure – Ground Water
Concrete Capillaries
HydrostaticPressure
Pressure
Foundation Wall
Basement
Interior
The best way to deal with Hydrostatic Pressure is to “Redirect the Ground Water” to an outlet

Saturated Wall Assembly
Pressure
Basement Flood
Insulation/Vapor Barrier
Surface Finish Damaged
Let’s take a look at how Hydrostatic Pressure Affects Your BasementLet’s take a look at how Hydrostatic Pressure Affects Your Basement
Hydrostatic Pressure can cause – Basement Flooding + Structural Damage + Property Damage
Water
Pocket

How can Technologically Advanced Drain Products Protect your foundationHow can Technologically Advanced Drain Products Protect your foundation
from Water Damagefrom Water Damage
Geocomposite
Drain Board
Fabric
Drainage Core
Waterproofing
Foundation
Water
Pocket
Water
Pocket
Basement
Interior

Additional Uses for Geocomposite Drainage ProductsAdditional Uses for Geocomposite Drainage Products

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