Plumbing and heating expert Richard Trethewey helps a homeowner replace his leaky outdoor faucet. Then, up in the loft, landscaping contractor Roger Cook shows host Kevin O'Connor how to sharpen a lawn mower blade properly. Afterward, Richard, Roger,... (more) and Kevin, along with general contractor Tom Silva ask, "What is it?" Then Tom and Kevin build custom shelving for a walk-in closet.