Attic Blown In Insulation
It is very important to insulate the walls. It increases the comfort level and savings. Before you proceed to install wall insulation investigate the various materials and the techniques that are available. It is wise to limit the investigation to blown in insulation if you are living in a house already and you donít have any plans of renovation.
The walls which are not insulated loose the heat readily. This heat loss can cause the drafts across the floor, higher heating cost, the discomfort from the loss of body heat to cool wall surfaces, condensation on interior walls which lead to mould growth, mildew and decay.
The insulating increases the thermal efficacy. This reduces drafts caused by air leaks in wall, keeps the interior warmer which is comfortable, cause reduction in movement of sound waves and dust which keeps the attic clean and warm, reduces potential condensation related problems. The insulation saves the money spent on the heating bill. There are several materials that can be used to insulate walls. The list of insulators includes cellulose, foam, and mineral fiber. Vapor barriers and vents are also use for insulation.
Cellulose is obtained from shredded newsprint which is treated with fire retardants. This is non-toxic, do not cause corrosion on pipes or wires and do not burn. Due to its ability to fill small nooks and corners it is particularly effective wall insulation. This is also very useful to block the penetration of the air through the cavities of the walls.
Fiberglass and rock wool are the mineral fibers that are generally used to install in walls for insulation. To pack these materials into the cavity greater pressure is needed because of their tendency to catch on objects like nails etc. To install mineral fibers larger drill holes are required. If moisture is a serious problem then the mineral fiber is the best insulation because mineral fibers dry out eventually.
The use of foam insulation is becoming obsolete. Some problems have been experienced with this kind of insulation. The major cause of avoidance is the expansion of foam which causes bowing of walls. After the foam shrinks it causes cavities in the insulation.
The holes and small cracks in the wall are the main culprits that cause moisture in the wall cavities. Negligible amount of vapor passes through holes on the walls. Hence the vapor barriers and vent are not suitable insulators.
Proper installation is of utmost importance to avoid the gaps and voids in any insulation material. Improper installation may cause poor thermal performance. It is best to contract a professional for effective and efficient installation.
The average time required to install the blown in insulation is less than 24 hours. One member of the insulation installation team drills the wall cavities. He also probes for blocking. Another of crew member does the blowing of insulation in the cavity using the nozzle and hose from blowing machine. Generally a wall of height 8 ft requires two holes. After the blowing of insulator the holes are plugged using plastic or wood plugs.
Mineral fiber insulators are costly than the other materials since it increase the job difficulty. Most of the contractors assure a warranty of one year.