All cracks can present a threat to your concrete. Hairline cracks generally are less of a risk, but cracks that measure more than ¼” wide must be repaired as soon as possible. Avoid DIY repairs and invest in professional solutions from Dry Pro Crawlspace & Foundation Repair Specialists. Our PolyRenewal system lifts and stabilizes concrete and can help close cracks. Contact us for a free inspection and estimate.