https://themoversinhouston.com/2016/12/9-steps-to-building-a-tornado-shelter/ Underground shelters have a small advantage over their counterparts as debris from the storm does not impact the surfaces of the shield. However, the departure could get blocked, leaving you stuck in the shield. 5. Construction Material A semi permeable home made storm shield is constructed from concrete while a pre fabricated device is… Continue reading 9 Steps to Building a Tornado Shelter – The Movers in Houston