Signs you need it
- Ponding water after rain on a flat roof
- Open seams or failed flashing at rooftop units and parapets
- Ceiling stains below drains, units or roof edges
- A roof near the end of its warranty, with a lease or sale coming up
53% of the housing in Boulder sits outside single-family houses, higher than 96% of the cities we cover. 23 local roofers are listed.
Commercial roofing covers retail, office, warehouse, church and multi-family buildings. Most of these roofs are flat or low-slope and use single-ply membranes, modified bitumen, built-up roofing or standing seam metal.
Crews, materials and warranties differ from house roofing. A company that is good on shingles may not be the right one for a membrane roof.
A large share of Boulder's housing sits outside single-family houses, so flat and low-slope roofs are common. Ask every company about its experience with your type of building, not only with houses.
Hail of 1 inch or more has fallen near Boulder on more days than in most cities we cover. Membranes can be punctured by hail, so ask for an inspection after a hail day, with core samples if the insulation may be wet.
| Fact | Boulder | Median city | Rank (1 is highest) |
|---|---|---|---|
| Housing units outside single-family houses | 53% | 33.2% | 9 of 213 |
| Days with wind gusts of 58 mph or more | 8 | 50 | 207 of 212 |
| Days with hail of 1 inch or more | 30 | 16.5 | 60 of 212 |
| Roofing companies with payroll in the county | 20 | 18 | 91 of 210 |
June has the most reports, 52 of 146. 99% of reports fall from May to September; the other 2 come in October (2).
The largest stone in NOAA's record for Boulder County fell on June 18, 2018: 3 inches, about the size of a teacup.
That day brought 23 reports, with the largest from Superior.
A commercial roof laid before June 2018 was in place for the largest stone in the record, so ask for a roof survey and keep it with the warranty papers.
The strongest tornado in the record was rated EF3 on June 4, 2015 and stayed on the ground for 5.84 miles.
The strongest thunderstorm gust was 72 mph, on March 30, 2014.
| Date | Largest hail | Reports | Where |
|---|---|---|---|
| June 18, 2018 | 3 in, a teacup | 23 | Superior |
| July 5, 2019 | 2.5 in, a tennis ball | 24 | Louisville |
| June 4, 2015 | 2.5 in, a tennis ball | 5 | Lyons |
A commercial roof is priced by the building: its area, membrane, insulation, drainage and rooftop equipment. One range per city would mislead.
Ask each company for a written scope and a price per square foot of roof, so bids can be compared line by line.
Estimates for a 2,000 square foot roof, not quotes. How we build them6 of 23 listed. They are based in Boulder (3), Broomfield, Frederick, Lafayette. We do not tag companies by service, so ask each one about commercial roofing.
4277 N 109th St, Lafayette, CO 80026
3490 Fordham Ct, Boulder, CO 80305
11001 W 120th Ave #400, Broomfield, CO 80021
3768 Eureka Way, Frederick, CO 80516
6115 Ben Pl A, Boulder, CO 80301
3551 Pearl St, Boulder, CO 80301
Permit requirements depend on the property, scope of work and local jurisdiction. Check with the city or county building department and confirm who will obtain any required permit before work starts.
Send one free request. We offer it to one local company at a time. We can't promise when a roofer will call.