If you are certain that the stack effect is at work in your property, there are a few things you can do to protect your home’s internal environment. Prevention The best thing you can do to protect your home from the stack effect and the damage it can cause, of course, is to prevent it from taking root in the first place. In this endeavor, the best thing that you can do as a homeowner is encapsulate and waterproof your crawl space. By doing this, you will cut off the main source of exterior ventilation in the lower reaches of your home and protect your property from dampness and avoidable damage. Secondly, you should check your windows, doors, and utility inlets/outlets for signs of damage and wear and tear. The degradation of the sealant around these areas is a common cause of the stack effect in many homes, as well as an entry point for moisture. As such, regularly inspecting them will allow you to renew the sealant and repair damage quickly, preventing further issues in your home. Repair Once there is damage in your home and the stack effect has started to take effect, there is nothing you can really do except repair the damage and seal off exterior ventilation points. This task can vary in size, depending on the nature of the damage and how long the issues have been at work before you noticed them and began to rectify them. Of course, the more serious the damage is, the longer and more costly the repair process will be. If the cause of the stack effect is a seriously bowing wall, for example, the repairs could take some amount of excavation and time. By contrast, when the stack effect is being caused by an unsealed HVAC inlet or outlet somewhere in your home, it will simply be a case of renewing the sealant (assuming no secondary damage has occurred already).