Fiberglass Blown-In Insulation

Fiberglass Blown-In Insulation

Fiberglass Insulation

A common substance used to insulate dwellings is fiberglass insulation. It can either be professionally installed as blown-in insulation or as batts. Fiberglass insulation is able to increase sound deadening and resist water absorption since it is made from tiny pieces of recycled glass combined with sand. To avoid the potential of additional water damage, you should, however, take care of any current leaks and similar problems before insulating.

The energy efficiency and environmental friendliness of fiberglass insulation materials are continually enhanced, as with all other insulation products. Theoretically, it has been expected that heat transfer through fiberglass insulation positioned between two opaque, isothermal walls will occur by radiation and conduction. Depending on their size and direction, glass fibers can absorb, emit, and anisotropically scatter light. In order to determine the bulk scattering and absorption coefficients and phase functions that appear in the radiative transport equation, the measured spectrum optical constants of glass, as well as the fiber diameters and orientations, were used. The iterative solution of the energy problem and the discrete ordinate approximation to the radiative transfer equation were both necessary for the coupling of radiation and conduction. It was discovered that approximately half of the total heat transfer is accounted for by radiation and the other half by conduction and that this coupling generally results in a nonlinear temperature profile.

Fiberglass should always be topped off at a height of 20″-21″ to ensure the heat is kept in properly, while maximizing your savings with your utility bills.

What are the Pros and Cons of Fiberglass Insulation?


  • Can be paired with spray foam insulation and put in almost any place.
  • Resistant to fire and water (be sure to fix leaks and pre-existing issues first)
  • Provides sound absorption
  • Cost-effective
  • R-Value similar to that of cellulose insulation
  • Spray foam can be combined with it to great effect Drawbacks


  • Maybe requiring more airtightness or air barriers

Product We Use

Johns Manville residential insulation products aid in maintaining energy efficiency while lowering heating and cooling costs in the home year round. Providing thermal and acoustical control for horizontal and vertical applications, Johns Manville provides a range of thermal resistant R-values.