On house wrap how far do you lap the edges and ends?

On house wrap how far do you lap the edges and ends?

• A. 6 inches on edges and 6 inches on ends
• B. 2 inches on edges and 6 inches on ends
• C. 4 inches on edges and 8 inches on ends
• D. 6 inches on edges and 10 inches on ends

Answer: (B)

Lapping house wrap is all about creating a weather-resistant barrier that sheds rain and protects the wall behind it. The best approach uses a small overlap where sheets meet along the long edges and a larger overlap where sheets end. The small edge lap keeps the wrap from building up too much along continuous runs, so it lays flat and the fasteners can hold securely without creating bulky spots that can trap moisture. The larger end lap is placed at the joints where one sheet ends and the next begins, ensuring the seam is well covered and water running down the wall has a better chance of being diverted away from the wall cavity. This combination helps the wrap seal effectively when taped and reduces the risk of water penetrating through seams. Always follow the manufacturer’s installation guidance, but the general idea remains: smaller overlaps at edges, larger overlaps at the ends to protect the seams.

Lapping house wrap is all about creating a weather-resistant barrier that sheds rain and protects the wall behind it. The best approach uses a small overlap where sheets meet along the long edges and a larger overlap where sheets end.

The small edge lap keeps the wrap from building up too much along continuous runs, so it lays flat and the fasteners can hold securely without creating bulky spots that can trap moisture. The larger end lap is placed at the joints where one sheet ends and the next begins, ensuring the seam is well covered and water running down the wall has a better chance of being diverted away from the wall cavity. This combination helps the wrap seal effectively when taped and reduces the risk of water penetrating through seams.

Always follow the manufacturer’s installation guidance, but the general idea remains: smaller overlaps at edges, larger overlaps at the ends to protect the seams.