Small Holes in a New Concrete Wall: Are They Bugholes?

Published 2026-10-25 · By Reagan Carrier · 449 words

Small, rounded holes visible after concrete forms come off may be bugholes: surface cavities left by trapped air. Ask the contractor to identify them before approving a patch or covering the wall. The useful next question is whether the surface meets the agreed finish and any requirements for the material that will cover it.

Identify the condition before naming the repair

The Concrete Society describes these cavities, also called blow holes, as air trapped against the form face. It treats ordinary blow holes as an appearance issue. That description is not a diagnosis of every opening in your wall, and a photograph alone should not become a structural acceptance decision.

Take one photograph showing the whole wall and another showing the affected area beside a ruler. Note whether the holes were visible immediately after form removal. Ask the contractor to identify what you are seeing rather than assuming all openings have the same cause. Mark any areas you want reviewed on the photographs so the discussion refers to specific locations.

Separate appearance from preparation for the next trade

For a wall that will remain exposed, bring the specified finish, approved sample, or relevant proposal wording to the walkthrough. Ask which areas are accepted as built, which need further review, and what a proposed repair is intended to achieve. If appearance is the concern, request a small repair sample before authorizing treatment across the entire face.

If waterproofing is planned, include that installer in the discussion before anyone fills holes. Ask the installer to identify the selected system and provide its current substrate preparation requirements. Who will confirm the surface is ready for that product? Who approves the repair material? Record those answers rather than choosing a filler solely because it promises a smooth appearance.

Leave the walkthrough with a short written decision

Record the wall location, the agreed next action, the responsible person, and whether covering the area must wait for review. Keep the original photographs with that record. This gives the concrete crew and the next trade the same reference instead of separate verbal instructions.

For a Middle Tennessee property, Milliken Corporation lists concrete foundations and retaining walls among its services. When requesting a review, explain whether the concrete will remain visible or receive another finish; include the project documents rather than requesting a particular filler in advance.

Frequently asked questions

Does every bughole need to be filled?

Not automatically. Confirm the condition, agreed appearance, and requirements of any subsequent waterproofing or finish before deciding on treatment.

Should I fill the holes myself before the walkthrough?

Leave them available for inspection first. Ask for an agreed repair scope and product compatibility review before changing the surface or concealing the original condition.

Sources and further reading