In case of wider gaps, stack the boards on top of each other and where necessary, cut them to size using a hand saw.
While pressure-treated lumber boards will seal off the crawl space and keep away pests and rodents, they will at the same time hinder proper airflow further interfering with the shed’s underside ventilation. Although wood is commonly known to be prone to decay, pressure-treated lumber says otherwise.
With a special chemical preservative infusion, this skirting material offers better protection from fungal growth, elements, pest infestation, and bacterial growth than untreated lumber. This makes the skirting sturdier and durable.
The boards are also less expensive than concrete and brick skirting. When exploring ways of closing off bottom of shed, this is one of the tried and true shed skirting ideas that will last for years.