As houses are built tighter, they exchange less air between inside and outside. This saves energy, but the inside air can get stale if you don't have a fan and a plan
Many remodels require matching an existing trim profile for new doors or windows. When an old profile isn't available, you can make new pieces with a little bit of 'millwork magic'—and a giant pencil
A snowball effect of physics vs. physical structures: water carries salt to the surface of masonry, which crystallizes and can blow apart its masonry host.