Baseboards. Seal narrow cracks with paintable or clear latex caulk, either at the top or along the bottom where the baseboards meet the floor. Run a continuous bead of caulk along the gap and smooth it with a caulk tool or wet finger. Wipe away the excess caulk with a damp cloth.Regarding this, how big of a gap can I fill with caulk?
Measure the size of the gap that needs to be filled. A single bead of caulk can fill gaps up to 1/4 inch. If the gap is slightly larger than this, fill it with a bead of caulk deeper into the gap, but not flush with the surface.
Beside above, does caulking baseboards keep bugs out? Keep Bugs Out! Caulk and foam can serve as the first line of defense by sealing gaps and cracks around a home, helping to prevent pests from entering.
Likewise, should you caulk between baseboard and floor?
Caulk is useful for sealing small, thin gaps between baseboards and the floor or wall. It's not, however, appropriate for protecting the baseboard itself, which must be painted to provide protection from water damage and wear and tear.
Should there be a gap between baseboard and floor?
No floor and molding will be completely level over really long rubs and shoe covers the gap. It's been said to death, but that's what 1/4 round (or base shoe) is for. It hides the gaps between the baseboard and the floor. You can find something nice that goes with the feel of the house to put in there.
Should you caulk trim before or after painting?
Masking protects the surfaces you don't want to paint. Cracks show up better after priming, and caulk adheres better to primed wood, so complete any priming before you caulk. For a neat job, caulk all joints. Caulk all the joints between trim and wall surfaces to prevent penetration of moisture vapor into walls.Do I need to caulk baseboards?
While bathrooms or kitchens—the “splash zones” of the home—may require a waterproof caulk like silicone around the baseboards, most molding in the house benefits from latex caulks (sometimes referred to as “acrylic latex” or “painter's caulk”).How do you fill a gaping gap?
Start by caulking the molding as per usual, and include a bead of caulk in the gap. This will stabilize the molding. Don't worry about trying for a cosmetic fix with the caulk, just fill the void and let dry. 
