Foundation Jack Contractor Northern Virginia is Fairfax Contractor. If you are a Northern Virginia homeowner experiencing failing foundation basement or crawl space issues, we are a contractor that can help fix the problem. Foundation structure problems can be resolved by installing foundation jacks. If the load caring beam in your basement is failing, you may need to support the I-beam or load bearing member with one or more foundation jacks. Fairfax Contractor can analyze any failing first-floor issues and may recommend installing a support system called a foundation jack.