Preventing Moisture Damage When Raising Grade Against Brick Wall

Preventing Moisture Damage When Raising Grade Against Brick Wall

Building a raised bed with backfill 2 ft above brick base—high risk of water intrusion.

Why It's Dangerous

• Soil against brick wicks moisture into wall.
• Freeze-thaw cycles spall brick.
• No weep holes or flashing in most veneers.

If You Must Proceed

1. Consult waterproofing pro (basement specialist) first.
2. Apply liquid membrane to brick up to soil line.
3. Install dimple drainage mat against wall.
4. Perforated pipe at base, daylighted away.
5. Use well-draining backfill (gravelly sand).

Better Alternative

Build freestanding raised bed 12–18 inches from wall. Air gap prevents contact.

Cost of waterproofing often exceeds bed value. Rethink.