In New Jersey (and virtually all other states), construction defect cases for common interest community associations are heavily reliant on expert witnesses. Even if a building system is obviously defective — in that windows leak every time it rains, cracks have developed in walls, and sidewalks have sunken from improper soil compaction — the association must still present expert reports and testimony to prove its case at trial. Litigation expert reports in construction defect cases must generally address the following five issues: