The answer to 'how to repair underlayment' is to carefully inspect the underlayment and address any issues. Underlayment is the layer of material installed between the roof deck and the shingles or other roofing materials. It provides an additional barrier against moisture, wind, and other elements. If the underlayment becomes damaged, cracked, or worn, it needs to be repaired or replaced to maintain the integrity of the roof system.
To repair underlayment, first identify the area of damage. This may involve removing shingles or other roofing materials to access the underlayment. Clean the area and apply a compatible roofing sealant or adhesive to seal any cracks or holes. If the damage is more extensive, you may need to replace the underlayment in that section. Be sure to follow the manufacturer's instructions and use the appropriate underlayment material for your roof type.