Evaluating a Contractor's Drainage Installation: Holes Up or Down?

Perforated Pipe: Holes Down Is Standard

Drain pipe perforations should face down (4 and 8 o'clock) to collect water from the surrounding soil. Holes up relies on surface water falling in—inefficient for subsurface drainage.

Other Concerns

• Pea gravel bed under pipe? Not observed.
• Sleeve (filter fabric) is good—prevents soil clogging.
• Backfilling with dirt temporarily is okay if fabric is intact.
• Lower third of yard: ensure pipe continues with consistent slope to outlet.

Needed Info for Full Assessment

House size, roof area, downspouts, soil type, climate, water volume, final grade. A photo of the whole yard would help.

Request the contractor to correct hole orientation and verify gravel bed before concrete pour.