e new subflooring using 8d galvanized nails or deck screws. 7. The Sealing of Cracks If you notice cracks on the carpet of your subfloor that has been damaged Seal the cracks. Sealing cracks repair the damages, but additionally prevents the possibility of further damage. Apply a generous amount of sealant on the cracks. Keep … Continue reading How to Address a Damaged Subfloor Under Carpet – Carpet Cleaning Fort Dodge