I have been studying insulation lately, and how homeowners could improve their energy efficiency, but then I remembered moisture control.
Insulation is a big topic in my home inspections. Basic insulation practices can help a homeowner save money, and I honestly think that is the bigger motivator than being green or thinking about green insulation, because you want to help the environment. Adding insulation to your attic is such an easy way to improve energy efficiency. Placing a radiant barrier in an older home may not always be as simple, but this job is not beyond most homeowner’s abilities.
I was on a forum where a Realtor was asking what could he do to prepare a home for a home inspection? The other Realtors chimed in saying caulking. More properly we should say sealing the home. This project ties in with insulating your home. If cold air cannot flow into the home, the insulation does not need to deal with this lack of heat. I tell clients to seal joints to prevent moisture from entering the walls. The amount of water that can flow through a small crack is incredible. I hardly mention the fact that this has a benefit towards energy efficiency, but sealing a home does play an important factor in energy efficiency. I inspected a new home construction where the builder had taken eco-friendly, green steps. Most builders are incorporating green building techniques, yet home buyers are not always asking about these steps. In this three story home, I ran the downstairs heater. The home was so efficient that the second story was well heated with only the downstairs unit running. By the third story though, I began to feel the chill.
Why should we be worried about insulation or sealing if they do so well at reducing energy usage and costs? There is a flip side to insulating and sealing, trapping moisture in the home. Moisture in the home does more than damage your clothes, or cause mold. Moisture can weaken and damage the structure of your home. Moisture control needs to be on our mind when considering how to make our home more energy efficient. Simple moisture control steps are vents in the bathrooms and kitchen. Bathroom vents are mainly considered to be for odors, but these vents are meant for moisture control. Another moisture control device is the kitchen vent. Step back to look at your pans when cooking. You may not have added water, yet you will find steam rising. The kitchen vent is not always present in homes. We forget that the basic form of moisture control is opening a window. This technique was how moisture was vented, but we seem to have forgotten about it. Kitchen vents have to go to he exterior to rid the home of moisture. Many homes have recirculating vents. The cooking steam is drawn through a filter, which removes oil and some moisture, but then the vent allows the remainder of the moisture go back into the room. The moisture on the filter will go back into the room as well.
One popular device for moisture control is an HRV (heat recovery ventilator). These units vent stale, moist air out of the building while taking in fresh air. During cold weather, the HRV captures the heat from the interior air to heat the incoming fresh air. During hot weather, the device takes heat back to the exterior.
Insulating and sealing are good do it yourself projects, but before sealing and insulating is complete, consider how you will control the moisture which is now trapped inside the house.