Building Materials That Can Affect Your Cell Reception

A woman using her phone with a cellular signal booster in a mall.

One of the major reasons for having a poor cell reception inside your building is the blocking of the cellular signals by building materials. A lot of people experience low signal quality inside their homes and offices because of this reason. 

Different building materials can affect the signal strength inside your building. The following are some such materials that can have a dramatic impact on your cell reception.

Building Materials That Can Disrupt Cell Signals:


The ceiling and interior walls of your building are most likely made using drywall, and they act as the first interior line of defense that prevents cell signals from getting into your building. Drywall might reduce the gain by 2dB. 

Fiberglass Insulation

Fiberglass insulation that can be present in the walls or in the attic might also block cellular signals. It can contribute to a loss of 2dB and when teamed up with drywall there can be -4dB loss. Hence, there will be a great reduction in the strength of the signals by the time they enter your building. 

Clear Glass

Clear glass used in your windows can also prevent the signals from entering your home or office. It will reflect and refract the signals thereby resulting in poor cell reception inside your building. Clear glass can result in a reduction of -4dB. 


Plywood is another common building material that can have a significant reduction in cell signal strength. And if this plywood gets wet, then it will act like a sponge that is capable of weakening the strength of the signals up to -20dB. 

Solid Wood

Your wooden door and furnishing can also act as a barrier for cell signals. Any type of wood including oak, maple, mahogany, etc. can absorb and block cell signals. The reduction in the signal strength will increase when the wood gets thicker. The loss of gain caused by wood might be between -5 and -12dB. 


Plaster is usually made from lime, gypsum, or cement and is used as a protective coating on ceilings and walls. It can cause a reduction of -8 to -15dB. 


Bricks made from cement, shale, or clay are among the commonly used building materials. They can also contribute to the blocking of cell signals. The reduction can be between -8 to -28dB. 

There are different building materials that can block the signals from entering your building. In this situation, a cell service booster can be helpful for you, as they can boost the strength of the signals. Such mobile network boosters are widely available now, and they can be a great solution for you if you experience poor signal quality because of the building materials.