by Charles Hendricks | Feb 6, 2016 | architecture, Indoor Air Quality
Should you use spray foam insulation on your next project? Common questions answered by Ken Wells from Elite Insulation
A common question we face on each job is which kind of insulation is right for the goals established. I asked Ken Wells to answer some of the common questions we face. Here are his responses:
Does spray foam insulation cause indoor air quality problems?
Any improperly installed insulation has the potential to cause or lead to indoor air quality issues. This is why it’s very important to choose your insulation contractor carefully, just as you would with any other contractor. There are also many other building products and home goods inside your home which have the potential to be the source of indoor air quality issues. Spray Polyurethane foam insulation utilizes diisocyanate, which isn’t scientifically detectable after 1 hour of when the foam ins applied. Installing spray foam requires a professional certification and proper equipment to install it. Properly installed spray foam insulation is an inert plastic and is just as safe as the plastic trash bag in your kitchen trash can.
How are R13 insulation different between fiberglass and foam?
Fiberglass works by trapping air inside tiny glass fibers that contain small bubbles of air, which slows the transfer of heat. It’s installed by folding, wrapping and cutting pieces to place in stud cavities. Human installation error coupled with the fact that fiberglass doesn’t hold in heat well and loses 40% of insulating capacity when outside temperatures are below 20° F make it an inferior product in comparison. Fiberglass has been laboratory tested to lose 8% of its labeled R-value right out of the bag, and has a 28% loss in R-value as commonly installed. Spray foam is sprayed by a certified spray foam applicator, expanding into all gaps, cracks and cavities and can adapt to any structural design, virtually eliminating human installation error. Most importantly, it’s an air barrier with excellent thermal properties for your home that seals warm and conditioned air in your home year round.
How much does it cost?
The up front costs for spray foam can be as much as three times the cost of conventional fibrous insulations, depending on your project. The benefits far out-weigh the difference in the up front costs. With spray foam insulation, you will be more comfortable in your home, which for most is their biggest investment. Utility bills are documented to be half as much or more with spray foam, which makes for a quick payback period.
For more questions answered, give them a call:
Elite Insulation (866-841-3034) offers:
Fiberglass Blown Insulation
Cellulose Blown Insulation
Fibergalss Batt Insulation (ask about our R-40 and R-49 Batted Insulation)
Cotton Batt Insulation
Spray Foam Insulation, Through PolyPro Spray Foam
Free, no obligation estimates
by Charles Hendricks | Feb 6, 2016 | architecture, Building Science, Indoor Air Quality
Should you use spray foam insulation on your next project? Common questions answered by Ken Wells from Elite Insulation
A common question we face on each job is which kind of insulation is right for the goals established. I asked Ken Wells to answer some of the common questions we face. Here are his responses:
Does spray foam insulation cause indoor air quality problems?
Any improperly installed insulation has the potential to cause or lead to indoor air quality issues. This is why it’s very important to choose your insulation contractor carefully, just as you would with any other contractor. There are also many other building products and home goods inside your home which have the potential to be the source of indoor air quality issues. Spray Polyurethane foam insulation utilizes diisocyanate, which isn’t scientifically detectable after 1 hour of when the foam ins applied. Installing spray foam requires a professional certification and proper equipment to install it. Properly installed spray foam insulation is an inert plastic and is just as safe as the plastic trash bag in your kitchen trash can.
How are R13 insulation different between fiberglass and foam?
Fiberglass works by trapping air inside tiny glass fibers that contain small bubbles of air, which slows the transfer of heat. It’s installed by folding, wrapping and cutting pieces to place in stud cavities. Human installation error coupled with the fact that fiberglass doesn’t hold in heat well and loses 40% of insulating capacity when outside temperatures are below 20° F make it an inferior product in comparison. Fiberglass has been laboratory tested to lose 8% of its labeled R-value right out of the bag, and has a 28% loss in R-value as commonly installed. Spray foam is sprayed by a certified spray foam applicator, expanding into all gaps, cracks and cavities and can adapt to any structural design, virtually eliminating human installation error. Most importantly, it’s an air barrier with excellent thermal properties for your home that seals warm and conditioned air in your home year round.
How much does it cost?
The up front costs for spray foam can be as much as three times the cost of conventional fibrous insulations, depending on your project. The benefits far out-weigh the difference in the up front costs. With spray foam insulation, you will be more comfortable in your home, which for most is their biggest investment. Utility bills are documented to be half as much or more with spray foam, which makes for a quick payback period.
For more questions answered, give them a call:
Elite Insulation (866-841-3034) offers:
Fiberglass Blown Insulation
Cellulose Blown Insulation
Fibergalss Batt Insulation (ask about our R-40 and R-49 Batted Insulation)
Cotton Batt Insulation
Spray Foam Insulation, Through PolyPro Spray Foam
Free, no obligation estimates
by Charles Hendricks | Jan 22, 2016 | Building Science, Indoor Air Quality
If your crawl space looks like this:
then your indoor air quality is suffering. You are also paying too much to heat and cool your home. Vented crawl spaces usually have insulation located in the joist spaces. This insulation gets pulled away from the heated surface by moisture in the space, which opens up air gaps and reduces any insulation value at all. The space usually has high humidity levels promoting mold growth. The heating and cooling vents running in that space usually have minimal insulation allowing for condensation to occur in the ductwork, again impacting indoor air quality and efficiency of the HVAC system.
Instead of a vented crawl space in our mixed humid climate, you should have a conditioned crawl space – like this one. Here is an example of an excellently sealed space.
My community’s wellbeing is our main concern, so give us a call for some great referrals to businesses that you can trust. If you are looking to build your home or business, read this post about how to achieve a healthy building through proper HVAC installation.
by Charles Hendricks | Dec 21, 2015 | Building Science, Green Building, green term defined, Indoor Air Quality
Green Terms Defined Summary 2015
2012 International Energy Conservation Code: Minimum energy code standards adopted by the Commonwealth of Virginia
Air Changes per Hour (ACH): the measure how many times the air within a defined space is replaced.
ASHRAE 90.1: a standard in the US that provides minimum requirements for energy-efficient designs for buildings except for low-rise residential buildings.
Carbon Footprint: a measure of the impact our activities have on the environment in terms of the amount of greenhouse gases we produce.
Carbon Neutral Building: the process of taking into account measuring, reducing, and offsetting carbon energy used by the building.
Cellulose Insulation: a low-thermal-conductivity material use to reduce heat loss and gain from a building.
Ceramic tile: made from clay that has been permanently hardened by heat, often having a decorative glaze.
Commissioning: verification and documentation that a building and the systems used are designed, installed, tested, operated, and maintained to meet the project requirements set by the building owner.
Conduction: the flow of heat through an object by transferring heat from one molecule to another. Think frying pan on a stove or wood stud that touches the inside drywall and the outside wall sheathing.
Convection: refers to the transfer of heat by a moving fluid. Thing warm air rising and cool air sinking in a room. Convection loops circulate near walls. During the heating season, warm air is cooled by exterior walls and falls towards the floor, creating a convection loop. Convective loops can also happen within framing cavities if the insulation doesn’t completely fill the space.
Edible landscaping: the practical integration of food plants within your landscape for the purposes of decorating as well as producing food.
Erosion: the removal of soil and rock by water from one location to another.
ERV or Energy Recovery Ventilator: part of a balanced ventilation system that transfers water vapor and heat from one airstream to another.
Flashing: a strip of impervious material used to stop water from penetrating the junction of a wall or roof with another surface.
Fly Ash: a fine, glass like powder recovered from the coal-burning process for the production of electricity.
Formaldehyde: A gas used widely in production of adhesives, plastics, preservatives, and fabric treatments and commonly emitted by indoor materials that are made with its compounds.
Grasslands Conservation Carbon Offsets: similar to forestry, native grasses and other vegetation provide a natural source of greenhouse gas (GHG) absorption and sequestration.
Historic Building: a structure that has historic, architectural, or cultural significance.
Humidistat: an electronic device that measures the relative humidity in a space.
HVAC: Heating, Ventilation, and Air Conditioning system in your home or business.
Infrared Thermography, thermal imaging, or thermal video: a type of infrared imaging used for determining air leakage in energy audits.
Insulated concrete form (ICF): a wall building system made of reinforced concrete and most commonly rigid thermal insulation.
Insulating Curtains: Thermal curtains have a lining that resists temperature change and are heavy enough to stop air flow.
Interior design: the art or process of designing the interior of a room or building.
Karst Topography: an area of irregular limestone in which erosion has produced fisures, sinkholes, underground streams and caverns.
Lifetime Home: A design approach that encompasses specific design features that ensure that a new house or apartment will meet the current and future needs of most households.
Light Shelf: a horizontal overhanging element located above the eye-level and typically having a highly reflective upper surface.
Linoleum: a resilient flooring product that was developed in the 1800’s. It consists of cork flour, linseed oil, oak dust, and jute.
Natural Ventilation: the process of supplying and removing air by natural means from building spaces by using windows, doors, solar chimneys, and non-powered ventilators.
Net Metering: a method of crediting consumers for the electricity that is generated on their home or business in excess of the total electricity that they have used.
No-Step Entry or zero-step entry: a flush entry from the driveway or garage into your home.
Pervious Concrete: concrete that allows water to move through the material into a storage area under the pavement.
Radiation: flow of heat from a warm source through space in waves of infrared or visible light energy. Think sunlight through a window.
Renovation: the act of repurposing / updating / remodeling of a building.
Resilient Design: the capacity of a design to adapt to changing conditions and to maintain or regain functionality and vitality in the face of stress or disturbance.
Single-stream recycling: a process or system where all paper, plastics, metals, cardboard, glass, and trash goes into the same can and is sorted by the facility into separate commodities.
Solatube: a tubular daylighting system
Specifications: define the requirements regarding materials, products, installation and quality aspects pertaining to the execution of the work and contract.
Thermal Bridge: where heat occurs across more conductive components in an otherwise well-insulated material, resulting in disproportionately significant heat loss.
Tiny House: home designed to be less than 1,000 sf
Vampire Load: the power consumed by electronics and appliances while they are technically switched off or in standby mode.
Vapor Barrier: a barrier that reduces the rate that water vapor can move through a material.
Wastewater: water from bathtubs, shower drains, sinks, washing machines, and dishwashers is considered grey water.
WaterSense: a label program created by the Environmental Protection Agency for consumers to easily identify water efficient products.
Weatherization: the practice of using cost-effective strategies to modify a building to decrease energy usage and increase comfort.
Window: Casement or Double-Hung glass opening in a wall system.
by Charles Hendricks | Dec 7, 2015 | green term defined, Indoor Air Quality
Natural Ventilation is the process of supplying and removing air by natural means from building spaces by using windows, doors, solar chimneys, and non-powered ventilators.
solar chimney
Most of us spend about 90% of our time inside of a building. As a result, the indoor air quality is critical to our health, productivity, and comfort. Scientific studies clearly show that buildings with proper fresh air ventilation improves productivity and health for occupants. If designed right, proper natural ventilation can be used to increase comfort and reduce energy bills.
Read more from our Green Term Defined series here:
Green Term Defined: HVAC (Heating, Ventilation, Air Conditioning System)
Green Term Defined: Energy Audit
by Charles Hendricks | Aug 14, 2015 | architecture, Building Science, Harrisonburg Architect, Indoor Air Quality
There are some common things on the wish list for most custom homes. Clients want an open floor plan, lots of light, a beautiful kitchen, luxurious master bathroom, and connection to the outside. However, it is not often asked for – healthy indoor air quality.
Materials, structure, and the heating, ventilation, and cooling systems all contribute to indoor air quality. Making the right selections in all these areas is critical.
Fireplace
There are common elements that impact indoor air quality. A fireplace is a leak in the building envelope. When there is a leak, it will either bring dirty air into the home or pull dirty air through the building envelope into the home. This also happens with restroom ventilation fans, crawl space, and duct work.
Ductwork
If the ductwork is not tight, it will actually spread dirty air around your house. Insulate it right and seal it tight.
Building Envelope
The building envelope is critical in the design of a home for healthy indoor air quality. Keeping the air from moving through the walls will allow you to filter make up air through a filtration system. This will, along with a fresh air system, keep the air flowing through your house healthy and clean.
Moisture
Also, and this one has big impacts to durability and indoor air quality, keep the water out of the wall system. Water infiltration in your home will contribute to indoor air quality faster than anything else.
Finally, the materials used in your home impacts indoor air quality. Do the materials you use have VOC’s? What chemicals will they off gas into your air? Are they easy to clean? What do you use to clean the materials used? All of these questions impact indoor air quality and should be considered.
It is not going to be on the top of your list, but include healthy indoor air quality when building or renovating.
