Homeowners should also be more wary of wall cracks that are located on critical load-bearing area walls, also known as “bearing walls” which support the weight of a floor or roof above them.

It forcefully expands, ensuring that the full depth and length of the crack is filled and is used for cracks in walls up to 24 inches thick. Polyurethane foam can expand up to 20 times its volume.

A wall crack found at a building in the Olympic Park Foreon apartment complex, formerly known as Dunchon Jugong, in Gangdong ...

However, cracks wider than 5mm (about the width of a pencil) are a red flag, and may show it’s time to schedule professional wall crack repairs.

Spotting a crack on your wall ranks high in the category of “ signs that could indicate your house is in danger.” But it turns out that wall cracks are pretty common in homes, explains Mike Powell, a ...