Easily fixed pipes or a few outdated electrical outlets are no reason to back out of a deal. However, other issues that come up during a home inspection should give you pause to think about whether or not to proceed.

Here are some red flags that warrant closer attention.

1. Water intrusion and grading problems Water in the basement, condensation on the walls and mold in the air indicate moisture and drainage problems that could cost a lot of money to fix. These issues often suggest improper grading.

2. Structural damage Cracks in walls, ill-fitting windows and doors, and visibly shifted bricks on the exterior are all signs of structural damage. Your cost to fix these types of problems? Anywhere from $20,000 to $200,000.

3. Roof repairs Old shingles, water stains on the ceiling or rotting rafters are all signs that the roof may need to be replaced. This is another extremely expensive undertaking, so pay close attention during the roof inspection.

4. Window replacement Windows that don’t work, fit the frame poorly or show condensation between the panes may need to be replaced. Depending on the number of windows, this could easily run between $5,000 and $8,000.

5. Insect infestation A general inspection should show you whether the home has a pest problem, which may prompt a need for a more detailed report from a specialist. This is a serious issue because some pests can cause structural damage.