As an expert in home insulation, I have seen the benefits of properly insulating an attic firsthand. However, before you jump into adding insulation to your attic, there are a few important steps you should take to ensure the project is successful. Not only will these steps help you achieve better results, but they will also make the process easier and safer. The first step recommended by the EPA is to seal any air leaks in your attic before adding insulation. This is crucial because if air can still flow freely through your attic, it will reduce the effectiveness of the insulation and lead to higher energy bills.
If you're not comfortable doing this yourself, don't worry - there are plenty of qualified contractors who can help you with this step. Before you start working on your attic, make sure it is cleared of any boxes or storage items. You'll need an empty space to work with. Then, grab a pen and notepad and draw a basic outline of your attic. As you inspect for air leaks, mark them on your drawing so you know where to focus your efforts. If budget allows, opt for the cheapest insulation with the highest R-value.
You may be able to find used insulation materials on sites like Craigslist or in your local newspaper. However, make sure to avoid using multiple layers of insulation with glued paper as this can trap moisture and lead to mold growth. When it comes to actually installing the insulation, I recommend starting with a layer of insulating sheets coated with kraft paper that can be unrolled between the beams. Make sure the paper touches the drywall on the ceiling of the top floor. Then, add as much loose insulation material as you can afford or place insulation blocks perpendicular to the existing ones.
Aim for a minimum R-value of 20, which is equivalent to approximately 15 cm (6 inches) of fiberglass or cellulose insulation. One important thing to keep in mind is to not block any ventilation grilles in your attic. This can turn your attic into a greenhouse and cause moisture issues. To prevent this, you may want to invest in special baffles that allow for proper air flow while still insulating your attic. If your attic already has insulation, you or your contractor will need to move some of it around to find any cracks, joints, or holes that need to be sealed. This is an essential step as it prevents moisture-laden air from reaching the attic and causing damage. While adding insulation to your attic is a moderately difficult DIY project, the benefits are well worth it.
And the good news is, you don't have to use the same type of insulation that is currently in your attic. As long as your attic is accessible and you feel comfortable tackling a larger home improvement project, insulating your attic can be a great DIY project. Now, let's talk about the actual insulation material. The most affordable option for DIY enthusiasts is uncoated fiberglass insulation. Simply place it over any existing insulation for an extra layer of protection.
However, make sure to check the recommended R-value for your area and add more insulation if necessary. When installing the insulation, make sure it is evenly distributed without any low spots. Sometimes, there may be enough insulation in the center of the attic but very little along the eaves. If you have any type of insulation between the beams, install the second layer on top of the first and perpendicular to it. And remember, the second layer should also be uncoated without any vapor retardant. If you're looking to transform your attic into a living space, you may want to consider insulating the attic floor.
This is especially important if you're on a tight budget or have a large attic to insulate. The recommended R-value for most attics is R-38, which is equivalent to 10-14 inches of insulation depending on the type.
