Treated Floor Joists Over Crawl Space

Use of pressure treated floor joists in a crawl space.

Treated floor joists over crawl space.

Both the beams and the floor joists are also sagging. A floor joist is one of the horizontal supporting members that run from wall to wall wall to beam or beam to beam to support the main floor. Any wood on a foundation wall and is less than 8 from the exposed ground. But most often it is wood 2 x8 s or 2 x10 s.

Learn how to fix these issues and shore up your crawl space supports. Floor joists in crawl spaces are closer than 18 to the ground. Pressure treated wood was developed as termite infestation prevention not so much as a rot prevention. The ends of wood girders entering into masonry foundation walls with less than 1 2 clearance.

It may be made of wood steel or concrete. The crawl space floor joist plays a vital role in the construction of your home. Typical beam installation includes pouring concrete pads in the crawl space then placing screw type house jacks on the pads and using the jacks to lift the beam perpendicular to the joists. These problems must be addressed firsthand prior to implementing any restoration steps.

The bottom 1 of 75 of the already overloaded floor joists are rotted. The sill plate is rotted in many places. Girders in crawl spaces are closer than 12 to the ground. When you re using fiberglass batting insulation material run it about 6 inches or so onto the crawl space floor.

The main beams down the center of the crawl space are staring to rot along the bottom edge and on the 2 outside plies. Cut pieces of insulation just large enough to fit along the rim joist the framing material into which all the floor joists are nailed. Wooden supports can easily rot and fail in problematic crawl spaces with open vents high humidity and standing water. Most often floor joists need to be sistered because of two problems either water damage which leads to rot or termite damage that crumbled the joist.