When it comes to adding insulation to existing construction, blow insulation is widely considered the best option for both attics and wall cavities. This is because it is installed quickly and efficiently by certified attic specialists, and can have a lifespan of up to 100 years. On the other hand, fiberglass insulation has a life expectancy of 20 years at most, while blown cellulose insulation is environmentally friendly, blocks air more effectively than other insulators, and offers a level of fire protection. However, expanded cellulose insulation is made from recycled materials and will begin to degrade between the ages of 15 and 30.
Rolled fiberglass insulation is bulky and can be difficult to place in the attic. Long, heavy rolls are very difficult to carry and install in attics. Foam insulation sheets are usually cut to size and installed on top of the wall, at the edge of the insulation. Laminated insulation and block insulation are similar, but their difference is that block insulation is already pre-cut to industry standard sizes, making it less prone to errors. As an expert in the field of attic insulation, I can confidently say that blown fiberglass insulation is the best option for attics.
It is much easier, faster, and provides a better R-value because of the way it is installed over any potential thermal bridge area and leaves no gaps. The movement of air through the insulation will reduce the R value of fiberglass insulation, so it's important to understand this when considering your options. The three types of fiberglass insulation are blown insulation, rolled insulation, and block insulation. Blown insulation is recommended in attics due to its ease of installation and long lifespan. Rolled fiberglass can be difficult to place in the attic due to its bulkiness, while block insulation is pre-cut to industry standard sizes.
Homes that do not have adequate attic insulation can be affected by high energy bills, uneven room temperatures, high humidity, or even mold. The use of an insulating machine with a hopper, fan and hose that supplies insulation to the area where it is needed can help ensure that your attic has adequate protection. Manufacturers use recycled newspapers for the insulation of cellulose and slag wool and fireproof rock wool for the mineral wool. If you have installed an insulator in the form of blocks and are considering placing a recessed insulator on top as reinforcement, make sure you understand how air movement through the insulation will affect its R value.
