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Residential Comfort & Energy Efficiency
Friday, August 28 2020
Get to the Root of the Problem
A doctor always wants to get the the source of the issue. Let's consider a lower back ache as an example. If you hurt your lower back chances are the doctor will give you a muscle relaxer for the symptoms. A good doctor will likely give you a pamphlet on core strengthening exercises to get to the root of the problem.
Specialized Contractor Needed for Damp Basements
Some issues inside the home can be confusing and confounding for many contractors. A damp basement and high humidity are hard to solve. As a homeowner, knowing where to turn for help might be difficult to figure out. Making matter worse, getting the wrong contractor can waste time or cost extra money.
Indoor Humidity and Seasonality
The recommended indoor humidity level - year round - is between 40-60%.
To get a handle on indoor humidity, the first thing to understand is the seasonality of indoor humidity.
In the summer the air outside is hot, humid and sticky in Maryland. We run our dehumidifiers in the basement. If you have not gotten around to attaching the hose most likely you are dumping water on the regular. This effort pulls extra moisture from the air.
In the winter everyone talks about the Polar Vortex. Aside from being very cold, the Polar Vortex is also very dry! In winter our hands are cracking, lips get chapped and we need to introduce moisture into the inside air. In this case a humidifier is used.
So, I will be clear. High indoor humidity is more of a summer issue.
Home Energy Audit
The key to solving a high indoor humidity issue is to look at it like a doctor. We need to find the source of the humidity in the air. We need to attack the problem. Where is the humid air getting in? Waterproofing will not completely solve the issue. Industrial strength dehumidifers are the muscle relaxer and treat only the symptom.
Having your home evaluated by a certified Building Analyst (BA) is a great way to identify home air leakage. It is important to understand that air leakage works both ways. Not only does air leak out of a house (exfiltration) air also leaks in (infiltration).
A blower door test can uncover air leakage points around a house.
Working with a Building Analyst is a great place to start for a damp basement due to a high indoor humidity issue.
Thursday, August 27 2020
Did you know that at any given time there are around forty approved BGE contractors to do energy audits for Maryland homes?
Every once in a while I get a call from a Maryland homeowner that already had an audit performed and they want to get another quote. It happens quite often and what I can report to you is that I am amazed at the lack of details in the audits that I get to review.
Once a homeowner gets an energy audit, their home's "scenario" is registered in the BGE database. All approved contractors can request access to the file if the homeowner authorizes it. So, I get to see my peers final product and I can say, I have been less than impressed.
Providing a comprehensive energy audit is a specialized service. It takes many hours of training, hands on experience and practice to give a great all around energy audit.
With so many houses in Maryland and so few BGE auditors how can you be sure to get a great auditor that hits on all points? After all, you only get the audit one time for the discounted price of $100.
Here are the questions you can ask the company (including us) you choose for your BGE energy audit:
1. How many BGE energy audits has the assigned auditor performed?
2. What is the auditors background before becoming an auditor?
3. What level of detail does the auditor plan to add to the energy audit report?
4. What is the physical condition of the energy auditor assigned to my house?
5. Is the auditor a good communicator and willing to engage?
1. How many audits have you completed?
Collecting the necessary data points during an energy audit is important. Having the repetition and experience allows a great auditor to assign time to the issues. If an auditor is new, taking accurate measurements may be a challenge. The auditor is learning on the job.
Everyone has to start somewhere, but do you want your one-time discounted audit to be the one? A great audit can unlock amazing concepts that will put you in control of comfort and energy usage.
2. What is the auditors background?
An energy audit looks at a house in a different way than a window consultation or roof estimate. An energy auditor is a three dimensional thinker whereas a window salesman has a one track mind. And, I am not even talking about making the sale.
An energy auditor needs to know a little bit about everything around a typical house. Having a background as a home contractor helps, but also being a homeowner is important. Experiencing and problem solving around your own home generates great learning experiences. These experiences along with learned concepts can go a long way towards helping you!
3. How is the final report going to look with a mediocre BGE energy auditor?
It is going to be a complete bore. The template for the BGE energy report is well designed and the information is good.
A great energy auditor will add details that pertain to discussions you had. Your BGE energy report final copy will be something you can keep for reference.
4. Should I really ask about my auditors physical condition?
Believe it or not, but doing a BGE energy audit the way it needs to is demanding work. An auditor must be able to get in small spaces, climb in attics and inspect crawl spaces. An auditor must be in good physical condition to perform a great audit.
5. Communication Pulls it All Together
An energy auditor needs to be so many unique things and on top of that if they are not personable, then it is a waste.
An energy auditor must be able to articulate key concepts in easy to understand ways. If the auditor cannot complete this task, the BGE energy audit could end up being useless.
Saturday, August 15 2020
Why does Mold Form on Plywood?
Typically, condensation in the attic starts due to a moisture issue created by introducing two completely different air masses. Here are the two possible reasons this problem is happening in your attic.
1. No air sealing at the attic floor to stop warm, conditioned air from escaping into the attic (warm air/ winter issue) coupled with a lack of adequate attic ventilation creating conditions that are right for condensation that adheres to the plywood and eventually forms mold.
2. In summer a leaking AC HVAC duct in an attic and other HVAC related inefficiency can allow air to seep out and interact with the hot humid attic air, particularly if the attic is not well vented.