Exterior walls are walls that form the perimeter, or outer footprint, of a house. Homes in climates with termite problems often have a metal barrier installed under the sill plate to keep insects from climbing up the foundation wall and reaching the sill and all the other wood parts above. directly below and following the same path as the wall above. Pressure treatment protects the wood from moisture due to contact (or close proximity) to masonry foundation materials or from outdoor exposure. A house will rarely have an entire stretch of an exterior wall that is non-load-bearing. If the wall is a partial wall, meaning it stops short of an adjacent wall, it may or may not be load-bearing. On most homes, the sill plate is the first piece of wood in the entire house, and it essentially anchors the house to the foundation.You can see the sill plate from the inside of your house if you look along the top of the masonry walls in the basement or crawlspace. Because window glass and the exterior view take visual precedence, it is easy to miss the fact that substantially sized columns are in place. The first-floor walls are built on top of the slab or on short foundation walls surrounding the slab. The wood treatment also includes insect repellants to protect the wood from termites and other wood-boring pests. If you have remodeling plans that include removing or altering a wall, you must determine whether the wall is load-bearing or non-load-bearing. The sill plates are anchored to the foundation with large washers and nuts threaded onto the J-bolts. Either way, the wall studs form the underlying structure, and construction begins with fastening them together. When an exterior wall ignites, the fire can spread to the roof, windows, doors, and other building components resulting in substantial damage or total loss of the structure.The resistance of exterior walls to burning and decay is directly related to the material used and the amount of fire ignition components in the surrounding areas. In this case, it would not be incorrect to refer to the wall's bottom plate as a sill plate. Any part of a load-bearing wall that is removed must be replaced with a suitable structural support, such as a beam and/or columns to bear the same load that was supported by the wall. What Is Behind Drywall: Guide to Wall Studs and Framing, Guide to Removing Interior and Exterior House Walls, How to Build a Temporary Wall Inside Your Home, How to Replace a Load-Bearing Wall With a Support Beam, Reinforce a Bad Wall Stud by Adding a Sister Stud, How to Use a Lally Column (Adjustable Steel Column), Flooring Considerations When Finishing an Attic, Common Types of Brick Bonds Used in Masonry, How to Strengthen Floor Joists Before Finishing an Attic.