To-Do #4: Caulk Cracks and Gaps in Siding
Even small cracks and gaps in your home’s siding and trim can make a big difference in the heating bill this winter!
Check your siding — particularly around windows, doors, and vents — for cracked boards, gaps and cracks. Repair cracks according to the size of the gap:
- Small Cracks: Fill cracks smaller than 1/4 inch with a bead of exterior-grade paintable caulk.
- Larger Cracks and Gaps: Before caulking, fill cracks wider than 1/4 inch by pushing foam backer rod into the hole until it’s just below the surface. Then, cover the backer rod with caulk and smooth the surface.
- Holes and Large Gaps: Fill large holes and gaps with expandable spray foam in a can. Carefully spray the foam into the space, allowing plenty of room for it to expand. After the foam has hardened, trim it flush and paint or stain it to match.