Walls that dry / Guides

Installing Siding Correctly
Exterior cladding

How to install siding

...that the material be consistent in size to avoid walls looking warped. Air space behind correctly installed siding for drying and drainage © Ecohome Can you keep water and moisture out of walls? Some of the things we do that were originally intended to keep walls dry (polyethylene vapour bar...

Basement Design for walls prevents mold & midlew when renovating & finishing
Healthy indoor air quality

Basement renovations: How to prevent mold when finishing basements

...dry when standing in a cold rain, but it won't keep you dry when jogging under a hot sun. And unfortunately for many homeowners, the way basements were finished for the last few decades is about as logical as jogging in a raincoat. Above grade, walls are designed to dry to the exterior. That is impossible below grade...

Tyvek home wrap left exposed to wind and UV rays
Air and vapour barriers

Choosing the right house wrap / weather barrier, which is best?

...that will let liquid water drain out. Building walls that can dry © Ecohome If you have a loose or bunched up weather barrier that might block that space, you may be wise to install a thicker spacer to ensure that space is continuous. Care during installation is what will determine ho...

Gabion walls can be used for building homes
Concrete and masonry

Gabion Walls - what is a gabion cage & how to build with them?

...that we're going to continue to investigate for when using gabion cage walls for home building, is how to prevent air infiltration into and out of homes with gabion walls. But that really is about it. If there are more downsides to gabion walls that you have experienced, please let us know in the comments section below...

How to insulate basements properly
Insulation and soundproofing

Best practices for basement insulation in new home construction

...that prevent walls from drying. 6 mil poly vapour barriers are an above grade solution intended to allow walls to dry to the exterior, that is impossible below grade. The only drying that will take place below grade will be inwards. Building scientists agree that polyethylene vapour barriers on the inside of baseme...

How to Insulate Exterior Walls from the Outside US Canada Ecohome
Walls and Roofs

The easiest way to insulate walls from the exterior in older homes

...that walls are able to dry out. Be sure to either have your wall assembly designed by a professional, but better still, get an understanding of the science behind it yourself, that way you will be able to spot anything that seems fishy with enough time to change it. Check out some of the links below, and if you have an...

Building Climate Zones USA & Canada Maps Help with Specification of Homes
Planning and Design

Climate Zones in USA & Canada for Building Homes

...dry climate zone corresponds to the portions of IECC zones 2 and 3 in the dry category. Mixed-Dry climate zone Defined as: any region that receives less than 20 inches (50 cm) of precipitation annually, that has approximately 5,400 heating degree days (on the 65°F basis) or less, and where the average monthly outdo...

Slab-on-grade construction technical guide
Slab on Grade

Slab-on-grade technical guide

...walls need to be able to dry in at least one direction. In a cold climate, the walls above ground should be designed to dry predominantly to the outside. But, since soil is for all intents and purposes 'water', basement walls need to dry to the inside. Common building practice does not account for this, and a disturb...

What is Interstitial Condensation? (And how to stop it!)
Walls and Roofs

What is Interstitial Condensation in Walls or Roofs? (And how to stop it!)

...that problem would be when the day comes that you need to replace exterior siding, when you can add some exterior rigid insulation to the walls as a means of keeping your home cooler in summer. Remember, Insulation is the gift that keeps on giving, long after that fancy new central air conditioning system needs major...

Finished basements can lead to mold and mildew
Healthy indoor air quality

Why are basements moldy? How to fix or Prevent a Moldy Basement

...dry, they are already soaking wet. All it will do is prevent the thousands of liters of water that are already in the wall from drying safely to the inside, where it could easily be handled by a dehumidifier or by ventilation with an HRV or ERV System . The only way walls below grade can possibly dry is to the inside...

Poly vapour barriers in air conditioned houses can cause mold and rot
Healthy indoor air quality

Why you should Never Install Air-Con in a Home with a Vapor Barrier

...that. Vapor control measures that were originally intended to prevent walls from getting wet are now preventing them from drying. We know how to build walls better, but in a lot of cases we are prevented from doing so by regulatory bodies that have not updated codes to reflect better performing building envelopes. ...