That is Oriented Strand Board (OSB), typically used for sheathing. Looks like it has been used exposed to weather, which is not its intended use. There is no reasonable repair for that, other than r ... read more
That is going to vary depending on where you live, the particulars of your home construction, as well as particulars of your planned "pop-top". Here in Richmond, VA, the structure and exteriors, plus ... read more