Longmont's Highest-Rated Vinyl Siding Pros, by Google
10 vinyl siding installers earned a spot on this Longmont page by Google rating, not by a state file this site doesn't have enough of yet. Wind risk reads Relatively High and hail risk reads Relatively High for the county around Longmont, exactly the two stresses a panel's ASTM rating is supposed to answer.
Google Maps ratings checked · How we rank
29° / 73°Fnormal January and July mean temperatures
Temperature swings in Longmont
Longmont's July mean of 73°F is well below what a dark vinyl panel can reach in direct sun, which is part of why manufacturers warn about nearby heat sources.
January's 29°F mean, on the other end, is cold enough that a crew has to widen fastening clearances to keep panels from cracking.
Data: NOAA National Centers for Environmental Information, U.S. Climate Normals 1991-2020 (annual/seasonal and monthly, by station) (1991-2020), from the nearest NOAA station 1.2 mi away.
Storm ratings on file for Boulder County
Boulder County carries a Relatively High hail rating and a Relatively High wind rating on FEMA's National Risk Index.
Around Longmont, hail typically dents vinyl before it cracks it; wind tests the fastening pattern and the panel's locking design more than the raw material.
- Strong wind
- Relatively High
- Hail
- Relatively High
- Wildfire
- Relatively High
Data: FEMA, National Risk Index for Natural Hazards - County-level table, v1.20 (v1.20, December 2025).
Vinyl siding installers near Longmont, by Google rating
A single five-star review counts for less here than a few hundred reviews averaging 4.8, since the order below blends the star count with how many people left one. Nothing about that order checks a license, so ask to see one yourself before you sign.
WestPro Home Exteriors
Siding contractor
- Google rating
- Reviews
- 783
- Area
- Longmont 80501
Bulldog Roofing
Siding contractor
- Google rating
- Reviews
- 670
- Area
- Longmont 80501
Safe Plus Roofing
Siding contractor
- Google rating
- Reviews
- 43
- Area
- Longmont 80501
Denny's Roofing
Siding contractor
- Google rating
- Reviews
- 66
- Area
- Longmont 80501
Siding Design Pro & SDP Renovation
Siding contractor
- Google rating
- Reviews
- 34
- Area
- Longmont 80501
Colorado Superior Roofing & Exteriors
Siding contractor
- Google rating
- Reviews
- 63
- Area
- Longmont 80501
Stone Creek Roofing & Solar
Siding contractor
- Google rating
- Reviews
- 154
- Area
- Longmont 80504
Complete Exteriors of Colorado
Siding contractor
- Google rating
- Reviews
- 112
- Area
- Erie 80516
Rockies Roofing
Siding contractor
- Google rating
- Reviews
- 9
- Area
- Longmont 80501
Boulder Valley Windows
Siding contractor
- Google rating
- Reviews
- 11
- Area
- Longmont 80504
Before you sign, ask about the panel itself
- What thickness, in mils, is this panel, and does it carry an independent ASTM D3679 certification listing?
- Is this standard vinyl or insulated vinyl, and if insulated, what R-value is certified under ASTM D7793?
- What wind-load rating is the product certified for, in miles per hour, and how does that compare to {county}'s wind risk?
- Will the installer leave the manufacturer's specified expansion gap at trim, corners and openings, or nail tight?
- If the color is a dark shade, is it separately certified for color retention?
- Does any wall face reflected sunlight from a neighboring low-E window, and has that been accounted for in the material choice?