Safety Issues

• Many basement windows are installed with special breakaway glass that will enable an escape from the basement in the case of an emergency. Placing any kind of non-removable apparatus that will block the windows can pose a fire hazard, depending on your home’s layout. It might also be illegal if you are renting your basement. Consult your state’s renting and building laws to determine the most updated regulations. Many codes require that basement bedrooms have unblocked escapes. Regardless, ensure that at least one window or door in the basement will allow for an emergency escape.
  
  

Light Issues

• You shouldn’t block out your basement light if you have plants in the basement that require light in order to grow. If you need to block the windows, move the plants outside or upstairs near a window where they will receive either direct or indirect sunlight, depending on the type of plant and the season.
  
  

Mental Health Issues

• Lack of sunlight has been linked to depression and other mental health issues. If you live in the basement or spend a lot of your time there, blocking the light can cause oversleeping or depression and should be avoided if you are particularly susceptible to depression.
  
  

Cost Factor

• Blocking up your basement windows can block out sunlight and air leaks, which can prevent the basement from becoming hot in the summer and too cold in the winter. Windows are generally the first place where heat will escape in the winter and where air-conditioned air will exit in the summer. Boarding up windows will help lower your heating and air-conditioning bills. You can also use insulation that you can see through so that you don’t block out the light, but keep in mind that this type of insulation will block out airflow.