That depends on several factors. Of course bad weather can prolong the time frame. An average sized home is 25 to 30 squares. If it’s a one layer tear off you can expect 3 to 5 working days depending on the pitch of the roof. 2 layer tear offs take longer as there are more shingles to tear off and more trash to dispose of. The size of the crew is also a factor, we have a crew of 4 very experienced roofers. We may not get the job done as fast as large crews but the quality of the installation will far surpass a large crew with inexperienced installers.  We don’t tear off if there’s a good chance of rain. We also try to tear off an area and install the shingles the same day. The best way to dry a roof is with new shingles. If we do only get synthetic felt installed and there’s a chance of rain we’ll also tarp the area over the felt paper. We do everything we can to make sure your house stays dry during the installation process.