Unforeseen subfloor issues are common in renovation projects. To manage this budget risk, require a pre-installation site inspection to identify known issues, then maintain a contingency fund of 10-15% of the total budget. If repairs are necessary, ensure the contractor provides a documented estimate for any additional labor and materials before they proceed. This prevents budget creep and ensures you are aware of the exact impact on your total project cost before the work is finalized.

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