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By Marc Lize on 2016-05-17
How to acheive good air quality in your home?
- A high efficiency heating system that provides air circulation complete with a heat pump to provide air conditioning during the summer is a good start.
- Home that heat with electricity, radiant heat, wood stoves all require mechanical air circulation to improve comfort and with the aid of a Heat Recovery Ventilator that brings in exterior air and mixing it with heated air while exhausting the stail air to the exterior.
- Simply opening a window here and there may not be sufficient with a home without a mechanical air circulation system, specially during the winter causing heat lost.
- A vapor barrier that is functional will prevent warm air condensing in wall cavities, attics and crawl spaces. An effective amount of insulation and good quality windows and doors will also prevent heat lost.
- A waterproof concrete foundation verses damproofing will prevent water ingress and with an effective perimeter drain tile at the footing will take the water away from the concrete foundation wall.
- A vapor barrier under the basement concrete slab and or a crawl space to prevent soil gases and humidity.
- Avoid building on flood plains and or areas that have a high water table during the winter months. These homes will require special planing from it's conseption and meeting all building standards, building codes and or the municipal district having jurisdiction. This will require meeting with the planing department of the municipal district for what they request prior to issuing a building permit.
- Homes with higher humidity readings in the 70% or greater will experience organic growth - (mold) on organic building materials and rust on metals products. Keeping the humidity level lower is important. Finding the cause by a hired professional to provide a permanent solution is best to prevent re-occurance.
- Warm air condensing in wall cavities and attic spaces will create organic growth derived from warm air and cold air condensing into moisture, a wet enviroment on plywood and engineered wood trusses will overtime rot the structure. Black mold with start forming and releasing it's gas even thought an attic space is concealed. A vapor barrier seperating the warm air from the cold air with adequate insulation will prevent heated air lost. For attic spaces with the addition of adequate number of air vent, or ridge vents. plus soffit venting at the bottom will help to mainatin an attic air temperature equal to the exterior. Also when building a new home a steeper roof will vent better by gravity that a lower roof profile that may require additional consideration in it's design for venting.