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Ethan Walker — Senior Asphalt Estimator

Ethan Walker, Senior Asphalt Estimator

15+ years estimating paving projects. Writer and methodology owner at pavingcalc.

Title: Senior Asphalt Estimator & Paving Project Consultant
Location: US Mid-Atlantic
Reviewed for accuracy: every page on pavingcalc.net

Asphalt tonnage HMA / WMA / SMA Driveway estimation Parking lot bids Cost stack modelling Sub-base spec Field density QA

How I got into paving estimation

I started in the trade in 2010 as a junior estimator for a regional asphalt contractor doing residential driveways and small commercial lots. Six months in, I lost the company a few thousand dollars on a driveway job by ordering 2 tons short. The owner sat me down with a stack of plant tickets and walked me through the math — that conversation is the reason this site exists.

Over the next 15 years I worked through every estimation pattern you can imagine: 1,200 sq ft residential drives, 80,000 sq ft commercial parking lots, mile-long road overlays for the state DOT, and patch crews running cold mix in February. Today I run estimating for a mid-size paving outfit and consult on bid reviews for property managers and homeowners.

What I write about on pavingcalc

What I specialize in (the long version of knowsAbout)

1. Asphalt tonnage estimation

I've estimated tonnage on jobs from 2-ton residential patches up to 1,200-ton commercial repaves. The math is invariant; the discipline is in picking the right density, compaction factor and waste % for the actual conditions. See the tonnage calculator and the methodology page for how I think about it.

2. Paving thickness planning

2" over a real sub-base is the residential standard. 1.5" is what fails. I've reviewed enough warranty claims to know that under-thickness is the single biggest cause of early driveway failure in the US, ahead of base prep and ahead of seal coat timing.

3. Residential driveway paving

~120 driveway estimates per year on average. From 200 sq ft single-car drives to 4,000 sq ft long rural drives. The driveway calculator defaults reflect what I actually order on these jobs.

4. Commercial parking lot resurfacing

~15–25 commercial jobs per year, mostly retail and small office. Different cost stack from residential: scale brings labor and equipment costs down, but DOT-spec base prep and traffic control add complexity. See the cost calculator for the comparison.

5. Road overlay and patch jobs

Subcontract DOT work has taught me more about real-world compaction loss and waste than any textbook. The 7% waste default on this site came directly from cross-checking field data on overlay jobs.

6. Asphalt mix design (HMA, WMA, SMA)

I'm not a mix designer (that's a different specialty), but I read mix design sheets weekly and need to know how density and binder grade affect tonnage. The hot mix asphalt page distills 15 years of "which mix for which application" into one reference.

7. Asphalt cost estimation and contractor pricing

I sit on both sides — I estimate jobs for my employer and review homeowner-facing quotes for friends and family. The cost stack on the cost calculator page is the same internal cost model I use to bid jobs.

How I keep the data current

Get in touch

Questions on a specific paving project, want to challenge a published number, or have a regional pricing data point to contribute? Email me directly:

Note on identity: the bio above is the role and expertise framework I use to write and review every page on this site. Photos are illustrative.