We don't always need to, again, depending on the specific job and materials. However, once you've accepted the quote and we're ready to order materials, we may return to measure again before ordering materials or starting work (especially if it's an entry door or specialized windows).
Why? Because we'd rather measure twice and cut once.
Homes settle. Details matter. And custom work demands custom accuracy. This second measurement ensures that when we show up to install, everything fits exactly as it should the first time.