Ask the Builder podcast 12 features two homeowner phone calls, a small warning from Tim and a story about the dangers of delivery trucks. Tim calls Donn and offers up a cool solution to fix a large concrete step crack. Defective shingles are the next topic. Tim talks about why your asphalt shingles are falling apart. Tim then calls Scott and shares how to stop the chipmunks from destroying Scott’s paver sidewalk.. The final segment of the podcast is a story about how delivery trucks can harm or kill you.