Three aging 32-by-16-inch basement windows in a concrete-block foundation replaced with new, properly sealed slider windows in Davenport, Iowa — cutting drafts and water infiltration while adding light.

PROJECT SUMMARY

Date posted: July 26, 2026
Service: Basement window replacement
Location: Davenport, Iowa
Problem: Three aging basement windows causing drafts, moisture intrusion, and energy loss
Solution: Replaced three 32” × 16” windows with new slider basement windows, securely anchored and sealed
Foundation / wall type: Concrete block
Window type: Slider basement windows (32” × 16”)
Quantity: 3 windows
Completion status: Completed

Project photos

New slider basement window installed in a concrete block foundation in Davenport, Iowa
Interior view of a newly installed slider basement window
New basement slider window letting natural light into the basement
Replacement basement window set and sealed in the block foundation
Interior of a new operable slider basement window
Basement window opening prepared for a new slider unit
New slider window secured in the foundation wall
Exterior view of a replaced basement window
Finished slider basement window seen from inside
New basement window installed and sealed from the exterior

Project overview

Older basement windows are one of the most common sources of drafts, moisture intrusion, and energy loss. On this project in Davenport, Iowa, we replaced three aging 32” × 16” basement windows in a concrete block foundation with new slider basement windows.

Properly installed basement windows help improve energy efficiency, ventilation, and resistance to water infiltration while allowing more natural light into the basement. When replacing windows in a block foundation, it’s important that the new units are securely anchored and carefully sealed to help prevent future leaks.

If your basement windows are rusted, difficult to open, or showing signs of water intrusion, replacing them can improve both the comfort and durability of your home. Behncke Construction proudly serves homeowners throughout the Quad Cities with professional basement window replacement services.

Project details

The old windows were undersized, leaky, and hard to operate. Each of the three openings in the block wall was fitted with a new 32-by-16-inch slider window, securely anchored to the block and carefully sealed at the perimeter, so the new units resist air and water infiltration instead of becoming the next leak.

What homeowners should know

Basement windows do more than let in light. In an older home they’re often the weakest point in the wall for drafts, moisture, and energy loss — steel-frame units rust, sashes seize up, and the seals around them fail.

When windows are replaced in a concrete-block foundation, the fit matters as much as the window itself. The new unit has to be sized to the block opening, anchored securely, and sealed carefully around the frame, because a poorly sealed basement window becomes a direct path for water. Slider units add easy ventilation.

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