When done correctly, most Class A installations take 1-2 days. Once we know the make, model and year of your coach, we can give you a better idea how much time to allow for the actual installation. Other factors include insurance approval and getting the glass to where you are — or will be, for the installation. Since we have virtually every RV windshield in stock, we can usually have it shipped to a qualified installer within 2-3 days.