Monday, May 15, 2017

As homes become more efficient, proper ventilation is increasingly important. Green building techniques and tighter building envelopes require proper air exchange to manage indoor air quality.

Why the increase in air quality problems? Older homes were “naturally” ventilated through uncontrolled air leaks and building products were manufactured without flame retardants and other additives. Today’s building products have more additives and homes are built tight compared to older homes. Tight building envelopes combined with the additives in construction materials require a controlled ventilation system to maintain optimal air quality and a home’s energy efficiency.

There are many factors that influence the type of ventilation system that is appropriate for a home. These can include local code requirements, building size, types of appliances, etc.

The four most common ventilation systems are:

  • Exhaust Only – This type of system uses a small exhaust fan that is commonly placed in a kitchen or bathroom. This is programmed to run either continuously or intermittently to pull out stale air and moisture. These systems are low cost and quite easy to install.
  • Supply Only – A supply only system includes a fan that brings fresh air into the home. The air escape happens through the natural air leaks in the home. A filter can be added to trap pollen and other outdoor air pollutants before they enter the home. A dehumidifier can be added inside the home to control indoor humidity levels.
  • Balanced – A balanced system includes both exhaust and supply, controlling ventilation at both ends. This system includes separate fans to manage air supply and air exhaust. Overall, this is a better ventilation system than exhaust only or supply only system.
  • Balanced with Heat Recovery – Like the balanced system, a balanced system with heat recovery will condition the incoming air prior to entering the home. This is a great system for cold climates, preventing cold air from being drawn into the home during winter.

Does your home have a ventilation system? Do you have questions about your home’s air sealing and ventilation? Contact us with any questions.

Tuesday, April 4, 2017

When winter begins to fade, thoughts of warm days and green grass are welcome. If you suffer from allergies, spring brings many symptoms that can make the season hard to bear.

If you or someone in your home suffers from allergies, air sealing your home is one way to keep pollen, dust and other irritants out of your home (not to mention it can make your home more comfortable).

A home’s envelope has many penetration points that allow air to enter and exit the home. These penetration points can be around things like duct work and chimney chases and exist between building materials (studs, framing, etc.). As a home naturally breathes, outside air is drawn into the home’s interior. This natural process draws outside pollen, dust and other irritants into your home’s inside air. 

Sealing air leaks helps keep outside air (and outside pollutants) out of your home. In addition to reducing interior allergens, air sealing your home has other benefits:
  • More comfortable living environment. Air Infiltration can contribute to problems with moisture, dust, as well as the entry of pests. Sealing air leaks can help control your indoor comfort.
  • Reduced energy bills. Sealing air leaks keeps conditioned air inside your home. This means your HVAC system will do less work to maintain your home’s internal temperature, which can reduce your energy bills
  • A quieter home. Air leaks also allow outside noise to enter your home. Sealing these leaks also keeps out noise, which can result in a quieter home.
Interested in air sealing? Contact or call us today for a free Air Sealing estimate!

Monday, March 13, 2017

Looking to upgrade your home with energy-efficient features? These five ideas will contribute to energy savings in your home.

#1 Exterior Doors   
Choosing the right exterior door for a home should be a carefully thought-out decision. When choosing a door for your home, first consider the doors' energy-performance ratings. This rating scores how well each door preserves the energy in your home by trapping heat or cool air inside.

#2 Insulation  
Insulating and air sealing your existing home is the number one way to reduce energy bills, save money, and reduce your home's carbon footprint. We have the tools (spray foam insulation, air sealing, and crawl space insulation to name a few) to make your home more energy efficient and more comfortable and keep your energy dollars from going out the window.

#3 Exterior Colors
The color of your home can greatly contribute to the heat inside it. A light exterior will help the home stay cooler, while a darker color will better maintain heat.

#4 Cool Roofs
Cool roofs are designed to reflect sunlight and lower roofing temperatures. Cool roofs are made from a type of reflective material within roofing materials such as tiles, shingles, paint or other substances. This energy-saving technique is ideal for houses in warm climates where air conditioning costs are high all year around.

#5 Flooring
The type of flooring you choose to place in your home can also save energy and money. Carpet traps heat and keeps your home warmer during the cold winter months. Choosing the right flooring for your home is an inexpensive way to save on climate-control costs.

Contact Us today for a free in-home estimate to make sure your insulation is doing it's job!

What’s this “R” thing all about when it comes to insulation? The "R" in R-value measures an insulation product’s resistance to heat flow. The higher the R-value, the greater resistance to heat flow and better thermal performance of the insulation.

R-value is important in determining how much insulation is needed in each area of your home (see our chart below). Depending on the area of your home you’re insulating (walls, crawl space, attic, etc.), different R-values are necessary.
Did you know R-value isn’t the most important factor when it comes to heat loss? More important than the R-value of the insulation in your attic, crawl space and walls is the air escaping in those areas through tiny (or sometimes not-so-tiny) penetration points.

Conditioned air (that you are paying to treat) is leaking out of your house from places like under your bathtub where a plumber cut a large hole for the pipes, where wood floor trusses of your house rest on the concrete blocks of your foundation, and an often repeat-offender is around recessed lighting.

If losing heated (or cooled) air isn't bad enough, the escaped air is replaced by unconditioned air from the outside of your house. That means more work for or air conditioner or furnace to bring your house back to your desired temperature. This is where power of spray foam insulation comes in. With this one product, your home is insulated and air sealed. It's a one-two punch in energy efficiency and lower heating and cooling bills for you. Check out this insulation chart to compare R-values across products.

Sound good? Give us a call and we can help with your project.

Monday, January 23, 2017

Spring means warmer weather and sunny days ahead. It’s also the time for winter melting and showers. Having your crawl space in proper condition will help keep water out of your crawl and help maintain the structural integrity of your home.

Here are a few things to keep in mind when checking out your crawl space:

One key to keeping water out of your crawl space is to move water away from your foundation. Making sure water properly drains away from your home will give water somewhere to go, rather than having it find a path of its own – into your crawl space.

It’s very common for cracks to form on the walls of a crawl space. Sealing these points will help water and pests out of your crawl space.


Insulating and conditioning your crawl space helps maintain the temperature of the floors in your home. It also creates additional storage under your home, increasing your home’s usable space. Spray foam insulation is a great product for insulating crawl spaces – in one application it insulates and seals cracks and other penetration points.

With spring moisture on the way, now’s the time to check out your crawl space. Contact our office for your free estimate. Have other crawl space or insulation questions? Give us a call!

Tuesday, October 18, 2016

Air sealing is the process of reducing the amount of air that leaks in and out of a home. It is an important step to reduce energy costs, reduce drafts and cold spots, help to keep out pests and allergens, and increase the overall air quality in your home.

Air leakage occurs when outside air enters and conditioned air leaves your house uncontrollably through cracks and openings. For years, it was believed that air leaks created proper home ventilation. Today’s building science proves this isn’t the case. Uncontrolled air leaks can cause too much or too little air to enter or leave the home. Either situation can result in poor indoor air quality.

Although air sealing is a very important part of home energy efficiency, it doesn’t eliminate the need for proper insulation. Foam insulation is a perfect solution to both insulate and seal air leaks.

Foam insulation expands when applied and completely fills a cavity. The product is applied as a liquid and expands to 100 times its volume. This means that the product fills cracks and crevices in a cavity, and expands to seal these gaps. With one application, your home is insulated and air sealed!

Interested in learning more about spray foam and getting an estimate for your next project? Contact us today and learn more.

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Delmarva Spray Foam
22976 Sussex Avenue
Georgetown, DE 19947

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