Friday, October 31, 2014

Your Spray Foam Questions Answered

Have questions about an upcoming project? Let us know, we'd be happy to answer your questions! Give us a call!

Where are the big leaks in my attic?
Typically, the biggest attic leaks are found where the walls meet the attic floor, above drop ceilings and overhangs, and behind attic walls. Look for dirty or discolored insulation to find the leaks. This indicates that air is moving through the insulation materials. There are many other “holes” in the attic ceiling that should also be sealed, such as recessed “can” lights, plumbing stacks, electrical wires, attic hatches or doors, around chimneys or flues, and duct chases. We have certified solutions for all of these areas.

Can I over seal my home or make it too tight?
While it is possible to seal a house too tightly, it is very unlikely in older homes. In new homes where we install spray foam insulation, we often recommend an energy recovery ventilation system be added. While this is an added cost, the reduction in tonnage needed to heat and cool the home can offset most or all of the cost.  A certain amount of fresh air is needed for good indoor air quality and there are specifications that set the minimum amount of fresh air needed for a house. 

Do you give free estimates? How long before someone returns my call?
We do give free estimates. You should receive a return call or e-mail to set up an appointment within 24 hours of your request. Simply fill out the form to the right and we'll be in touch!

Do you accept credit cards?
Yes. We accept Visa, Mastercard, Discover and American Express.

How much is attic insulation per square foot?
Because every job and condition is different, it is impossible to give square foot prices over the phone. We focus on energy efficiency and simply adding inches of insulation to your attic may not be the solution to your issues of high energy bills and comfort. We would be happy to provide a free estimate and energy analysis of your particular situation.
What is the R-value of spray foam?
Spray foam has an R-value of 3.7 per inch, which is comparable to fiberglass. The difference with spray foam is that it is an air barrier which stops the movement of cool air into warm areas, thereby preventing moisture problems. As an air barrier, spray foam prevents the leakage of air that fibrous materials allow. This saves energy, up to 25% in a typical home.

Why is spray foam more expensive than fiberglass?
While both are insulations, their physical characteristics are entirely different. Fiberglass is not an air barrier and lets energy escape. Spray foam fills every space in the framing, and seals the house while insulating it. The fact that spray foam is worth it resonates in our testimonial letters.

Can spray foam be sprayed in an existing home?
Yes, with certain conditions. Every home is different. We are happy to provide you with detailed options as to where and how spray foam can be used to improve your thermal performance and comfort level.

What is the difference between open cell and closed cell foam?
Open Cell foam is identified as a 0.5 pounds per cubic foot. It is made up of tiny cells of foam that are not completely closed. The cells are broken and air fills all of the “open” space inside of the material. This makes the foam have a soft feeling. Open Cell foam has an R-value of 3.4 to 4.5 per inch. 
Closed Cell foam is a 2.0 pounds per cubic foot. The cells are closed and packed tight together. They are filled with gas that helps the foam rise and expand. Closed Cell foam is a greater insulator due to its denser properties. Closed Cell foam has an R-value of 5.4 to 7.2 per inch.

How is spray foam better than traditional fiberglass?
Spray foam is applied in a liquid form, and then expands. As the foam is expanding it conforms to and fills every single nook, cranny, crevice, hole, crack and gap to create a continued thermal envelope. Spray foam insulation adheres to any clean, dry surface and will not shrink, settle or disintegrate over time.

Does spray foam support bacteria or fungal growth?
Open cell and closed cell offer no food value, and is an inert substance; therefore it does not support bacteria or fungal growth.

At what point during a construction project is spray foam applied?
Spray foam is applied after the windows, doors and roof, after the framing, plumbing, and electrical inspections are complete, and after any other systems located behind drywall is installed. Foam is the last installation to take place before drywall.

Can anyone install spray foam? 
Only trained, certified and licensed applicators can apply spray foam.

Still have questions? We're here to help! Give us a call!

Contact Us

Delmarva Spray Foam
22976 Sussex Avenue
Georgetown, DE 19947

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