50 low data
PANTELEIMON HATZIVASILIADIS LLC
5.0(1)✓ Google-verified
Not enough recent reviews yet to synthesise a reliable sentiment read for this business.
Roof RepairGutters & SidingRoof Replacement & Installation
Gunner Roofing
Roof RepairMetal RoofingGutters & SidingFlat & Commercial RoofingRoof Inspection & Insurance ClaimsRoof Replacement & Installation
- Location
- East Side of Stamford, Stamford
- Services
- Roof Repair, Metal Roofing, Gutters & Siding
- Reviews
- 641
- Ranking
- #211 in Roof Repair
- Best for
- Customers who can monitor the work closely and document all promises in writing before the project starts.
Google Business Profile is the source for the business data shown here, last checked 2026-09-25. Details taken from their website were fetched 2026-08-25.
What recent reviews say
Strong crews and individual project managers (Zach, Joe, Jesse) earn consistent praise for on-time work, clean sites, and willingness to fix issues during the job. However, several customers report unresponsive management after completion, installation mistakes requiring correction, debris left behind, damaged landscaping, and significant leaks or performance problems emerging months later. Communication breakdowns worsen the experience when customers try to address warranty concerns.
The company excels at sales promises and initial execution but struggles with follow-through accountability. Problems range from minor (broken gutter hangers, drip edge concerns) to major (roofs leaking at 18 months, mysteriously bulging sections, downspouts clogged with construction debris). Customers emphasize documenting everything in writing before signing and inspecting the work closely during installation.
Praised for
- punctual and responsive project managers
- skilled crew workmanship on roof and siding
- attentive to detail and customer concerns
- clean jobsite practices
Watch-outs
- poor post-job follow-up and unresponsive management
- installation errors require rework
- inadequate property protection during work
- leaks and structural issues months after completion
skilled-workmanshippunctualresponsive-communicationclean-jobsitepoor-communicationshoddy-workmanshipleft-messleaks-after-repairno-show
Best for: Customers who can monitor the work closely and document all promises in writing before the project starts.
Think twice if: Warranty and post-completion follow-up remain weak; plan to inspect gutters, downspouts, and roof edges after work ends and document issues immediately.
Where this business shines
- Individual project managers earn strong customer loyalty
- crew arrives on time and works efficiently
- willing to address issues discovered during install
Worth knowing
- Project managers Zach, Joe, and Jesse cited for responsiveness and problem-solving during jobs
- Subcontracted installation crews perform well operationally but create communication gaps when site PM absent
- GAF-certified installer
- James Hardie siding offered
- Roof leaks and performance issues emerging 18+ months post-install despite initial visual quality
- Post-job follow-up and warranty claims response frequently slow or unresolved
What reviews say by service
- Roof Repair
- competent initial repair but post-completion leaks and unresponsiveness to warranty claims undermine confidence
- Roof Replacement & Installation
- crews execute efficiently and on schedule; installation defects (drip edge, bulging sections, improper valley detail) discovered afterward and resist management follow-up
- Metal Roofing
- limited evidence; one customer praised hand-polished copper flashing work
- Flat & Commercial Roofing
- no direct evidence in reviews
- Gutters & Siding
- multiple installation errors (upside-down drip edge, broken hangers, improper pitch) and post-job debris clogging downspouts; inadequate communication when issues raised
- Roof Inspection & Insurance Claims
- no direct evidence in reviews
How it compares
- Rated 4.8 against a 4.77 average across the 687 gutters & siding businesses listed here.
- Has more Google reviews than 100% of the businesses in this directory.
What earned this score?
Our Rubric Star rating 86
Review volume 100
Review recency 100
Review sentiment 48
Profile completeness 100
Verification 30
Rating breakdown
5
605
4
10
3
5
2
3
1
18
Common questions
- What should I do before hiring Gunner?
- Get every detail in writing (gutter handling, material placement, landscaping protection, specific design requests). Take before photos. Confirm which Gunner representative will be on-site during installation and plan to be present during the work.
- Who manages projects at Gunner?
- Named project managers include Joe, Zach, Jesse, and Anthony. Customer experience varies significantly depending on which PM is assigned; Zach and Joe are noted for responsiveness and follow-through.
- What happens if I find problems after the roof or siding is installed?
- Contact management immediately with photos and documentation. Some customers report delays of weeks to months in response, so document issues and follow up persistently.
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