MGS Construction LLC
Salem, NH · Since 1998 · Ranked #1 of 25 in Southern New Hampshire
About MGS Construction LLC
MGS Construction LLC (since 1998) is a Salem, NH-based siding contractor offering siding, windows, roofing. Manufacturer credentials: CertainTeed 5-Star. Holds a 5★ rating across 570 Google reviews.
Strengths
- Manufacturer-certified installer: CertainTeed 5-Star
- Established 28+ years (since 1998)
- Written workmanship / manufacturer warranty
- Financing available
Credentials
GAF Master EliteCertainTeed 5-Star
Warranty
Manufacturer-backed (GAF/CertainTeed/Velux) + workmanship coverage
Areas served
Salem, NH · Windham, NH · Derry, NH
How we scored MGS Construction LLC
Our 84/100 reflects four weighted pillars. See the full method for exact weights.
- Customer reputation — 100/100. Aggregated star rating across Google, BBB and Facebook, weighted by review volume on a logarithmic curve — so a handful of perfect reviews can’t outweigh a long, consistent track record, and an established firm isn’t buried by a brand-new one.
- Manufacturer credentials — 74/100. The heart of a siding rating: manufacturer installer programs (James Hardie Elite Preferred, CertainTeed, the Vinyl Siding Institute, LP SmartSide, Mastic/Alside), plus state licensing and liability insurance. Certified crews install to spec and unlock the strongest material warranties.
- Workmanship & warranty — 79/100. Years installing exterior cladding, the breadth of materials a crew works in (fiber cement, vinyl, cedar, engineered wood), and the strength of the written workmanship warranty behind the labor.
- Service & local fit — 83/100. How rooted the company is in Southern New Hampshire, whether financing is offered, and how easy it is to reach, schedule and get a written estimate from.
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