Attic insulation has a very high ROI (Return On Investment) value since it can provide high energy savings. By just coming out with the initial installation cost, even though it’s a bit high compared to other insulation methods, you will essentially get it back in terms of reduction in your energy bills. In colder climates, quadruplicating a low attic insulation (say, three inches) may save up to 20% on house heating costs.
Attic insulation usually comes with loose-fill fiberglass, cellulose, rock and wool. In addition, attic also uses batts/rolls of fiberglass, cellulose and rock woll. Batt and roll insulation is a little bit more expensive than loose-fill insulation. Attic blown in insulation method is usually associated with loose-fill fiberglass or cellulose and it uses a blowing machine to do the installation.
Attic insulation which uses fiberglass is the most common and fiberglass is a cheap insulation material. Some people may prefer to use cellulose and mineral wool as they are good alternatives to fiberglass. Cellulose is considered as a ‘green’ insulator as it uses high content of recycled materials such as newspaper. The good thing is cellulose has a higher thermal and acoustical performance compared to fiberglass.
As mentioned above, attic blown in insulation is usually used on loose-fill fiberglass or cellulose. The installation isn’t difficult but the installation is best done with an insulation blowing machine. Precise calculation of the number of bags and thickness is required to obtain the desired R-value. Due to this reason, it’s best to hire a professional to do the installation for you.
Attic blown in insulation is best used to insulate the attic vertical walls (knee walls). If you are already living in a house and you don’t have any plans for renovation, attic blown in insulation is a better choice. The attic walls which are not insulated will loose heat readily. The heat loss can cause the drafts across the floor which leads to higher heating cost. Worst of all, condensation can occur on interior walls which can lead to mould growth, mildew and decay.
The average time required to install attic blown in insulation is usually less than 24 hours. Workers can usually multitask whereas one worker drills the wall cavities and also probes for blocking while another crew member does the blowing in the cavity using hose from a blowing machine. Generally a wall with a height 8 feet requires two holes. After the blowing of insulator, the holes are plugged using plastic or wood plugs.
In hot and mild climate, attics and roofs may greatly benefit from reflective insulation and reflective roofing such as membranes, coatings, ceramic light tiles, etc.
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