I've gotten three estimates from local roofers here in the Pittsburgh area for a new roof on our house. So far, the bids range from a verbal of $6,000 (nothing in writing) to $11,400, and I'm expecting one to come to me online today that exceeds the $11,400 bid and the fifth estimator will visit me this afternoon.
I have nearly 40 years' personal experience managing large, complex engineering and construction projects in the power industry. For me, a typical project is $100 million and up. And much of that has included projects in which more than half the total project cost has been for fixed price contracts for equipment, construction labor, etc. So I know a lot about how to evaluate fixed price bids. But not in the home roofing area.
I know that you have to put all the bidders on the same page with respect to scope and requirements. For roofing, that means they all have to measure the size correctly to estimate roughly the same quantity of shingles, etc. They all have to understand the owner's needs for things like new drip edge, new flashing around vents, new ridge vent, etc., consistently, so that everyone bids the same tasks, the same requirements, etc.
So let's assume, for the moment, that they all know how to run a tape measure. Let's say I know they all know I want the job to include complete drip edge along all rakes and behind all gutters, with all existing gutters to remain. Let's say they all plan to install a completely new ridge vent and new flashing. I.e., let's say I'm reasonably satisfied that they all know the "whats" of the job consistently and they all know the "how much" of the job consistently. [I know they're all pricing the same type of asphalt shingles with the same 25-yr guarantee, etc., so that shouldn't be the reason by itself for the spread, should it?]
From that point forward, what might be causing the wide spread in bid prices I've seen so far? I'm discounting the verbal $6,000; that's just too low to be credible. But I'm still looking at a spread from a bit below $9,800 to the $11,400 figure, and I won't be surprised if at least one of the two I still haven't seen are a $1,000 more than the highest I have now.
What am I missing? What questions haven't I thought to ask? If they all got the quantity right (one estimated 28 squares; the others haven't told me, and I know that in fixed price contracting I don't really care; I'm buying "enough" squares for him to do it right, even if he needs to do it three times!), could there really be that big a spread in labor rates between nearby competing bidders? Or is there something else at work entirely that I just have overlooked?
I have nearly 40 years' personal experience managing large, complex engineering and construction projects in the power industry. For me, a typical project is $100 million and up. And much of that has included projects in which more than half the total project cost has been for fixed price contracts for equipment, construction labor, etc. So I know a lot about how to evaluate fixed price bids. But not in the home roofing area.
I know that you have to put all the bidders on the same page with respect to scope and requirements. For roofing, that means they all have to measure the size correctly to estimate roughly the same quantity of shingles, etc. They all have to understand the owner's needs for things like new drip edge, new flashing around vents, new ridge vent, etc., consistently, so that everyone bids the same tasks, the same requirements, etc.
So let's assume, for the moment, that they all know how to run a tape measure. Let's say I know they all know I want the job to include complete drip edge along all rakes and behind all gutters, with all existing gutters to remain. Let's say they all plan to install a completely new ridge vent and new flashing. I.e., let's say I'm reasonably satisfied that they all know the "whats" of the job consistently and they all know the "how much" of the job consistently. [I know they're all pricing the same type of asphalt shingles with the same 25-yr guarantee, etc., so that shouldn't be the reason by itself for the spread, should it?]
From that point forward, what might be causing the wide spread in bid prices I've seen so far? I'm discounting the verbal $6,000; that's just too low to be credible. But I'm still looking at a spread from a bit below $9,800 to the $11,400 figure, and I won't be surprised if at least one of the two I still haven't seen are a $1,000 more than the highest I have now.
What am I missing? What questions haven't I thought to ask? If they all got the quantity right (one estimated 28 squares; the others haven't told me, and I know that in fixed price contracting I don't really care; I'm buying "enough" squares for him to do it right, even if he needs to do it three times!), could there really be that big a spread in labor rates between nearby competing bidders? Or is there something else at work entirely that I just have overlooked?