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TRUSTED BY SHERMAN, CT HOMEOWNERS

  • Average homeowner rating star icon4.5
    Average homeowner rating
  • Verified reviews icon141
    Verified security door installation services reviews

Top-Rated Security door installation pros in Sherman - Updated Nov 2026

Avatar for ADT
ADT
4.5(
890
)
Security Bars - Install or Repair - For Business

Serving Sherman, CT and surrounding areas

Approved (Corporate)

Super Service Award Winner

In business since 1874

Free estimates

Emergency services offered

"Last weekend had someone pry our side door open to our exterior garage and the ADT door sensor picked it up immediately. The alarm siren was loud and scared the person off. Someone from the response center called within 30 seconds. We’re fortunate that the security system did what it is supposed to. Feels like we made the right call going with an ADT security system."
Home Security Essentials
Smart Home Security
Cameras
Our Team
Home Security Essentials

+35

35 neighbors recently requested a quote
Recommended by88%of homeowners
Avatar for The Builders & Cleaners
The Builders & Cleaners
4.9(
122
)
Security Bars - Install or RepairSecurity Bars - Install or Repair - For BusinessSecurity or Storm Shutters - Install+3 more

Serving Sherman, CT and surrounding areas

Approved

In business since 2018

Free estimates

Emergency services offered

Based in West Haven, Connecticut, our team has provided an excellent, affordable service to more than thousands of houses over the years. We are committed to supporting our customers throughout the evaluation process, during the service itself and are available to answer any queries once the work is complete. \nWe are a licensed and fully insured company aiming to respond to all requests involving our services within 24 hours or less. Our professional and knowledgeable staff have a combined experience of over 12 years within the construction, air duct cleaning, and landscaping industries, ensuring guaranteed satisfaction with every job. \nWe pride ourselves in providing a safe, hazard-free environment and maintaining respectful, cordial communications with all of our clients. All technicians can be relied on to keep project sites clean both during and after the work is complete. \n

Dust out from the ductwork
Dust out from the ductwork
Clean vent
Clean vent
Dust in the return

+1837

Response time1 day
Response rate92%
Recommended by85%of homeowners
Avatar for Agile Construction and Home Improvement
Agile Construction and Home Improvement
4.8(
80
)
Security Bars - Install or Repair

Serving Sherman, CT and surrounding areas

Approved

Super Service Award Winner

In business since 2000

Free estimates

Emergency services offered

"Rafael was great - he fixed our front door knob and lock, replaced another door handle, and our towel bar. He worked us into his busy schedule and came by on a day that was best for me. Rafael picked up parts he needed at Home Depot after assessing what we needed, and efficiently completed all three jobs."
Entry porch
House flip
House flip
House flip
House flip

+232

Response time4 days
Recommended by52%of homeowners
Avatar for 1st Security USA
1st Security USA
4.6(
362
)
Security Bars - Install or Repair - For Business

Serving Sherman, CT and surrounding areas

In business since 2002

Free estimates

Emergency services offered

"I have investigated many companies and chose 1st Security because of such good reviews. 
Well I must add my excellent review for this company. Larry installed everything for us and he was 
very knowledgeable and made sure everything worked perfectly before he left.  
If I have questions he answers them right away. 
I would absolutely recommend this company to do your work. "
Recommended by94%of homeowners
Avatar for Security One
Security One
4.1(
456
)
Security Bars - Install or Repair - For Business

Serving Sherman, CT and surrounding areas

In business since 2007

Credit card accepted

"The job went very smoothly. The tech ran a bit late, but he called to say so. He installed a keypad by the front door and assessed the house for security. He suggested, since there are several casement windows in the living room and adjoining dining room that a breaking glass sensor would work better and be more cost-effective than alarming all the windows. He did alarm a door that the previous company (inherited when we bought the house twenty-three years ago) had not considered significant. I feel safer with the current sensor choices than the ones I had before.
He took the time to make sure I knew how to use the system, so I am very pleased with the service. My one caveat: I was told that the motion sensor would not register my smaller pets (two cats) because they weigh under forty pounds. They must have set off the sensor, though, because the police responded. The system certainly alerts the authorities, but that motion sensor is very sensitive!
"
Pictures
Compare our Compact Door Sensors to our Competitors
Additional Photos
Additional Photos
Additional Photos

+16

Recommended by84%of homeowners
Avatar for CSI Secure Solutions
CSI Secure Solutions
4.4(
114
)
Security Bars - Install or Repair - For Business

Serving Sherman, CT and surrounding areas

In business since 2001

Free estimates

Emergency services offered

""What struck me most about Chris was his patience along with his professionalism. I had never used a private detective before and was a little nervous, but he took the time to answer all my questions and explain the process. He was extremely accessible and kept me updated on my case. If you want someone who is professional, courteous, thorough, and who gets the job done right, I highly recommend Chris and CSI Secure Solutions.""
Background Checks
Employee Check
Background Report
Surveillance
Infidelity Monitoring

+12

Recommended by85%of homeowners
Avatar for Protect Your Home
Protect Your Home
3.3(
325
)
Security Bars - Install or Repair - For Business

Serving Sherman, CT and surrounding areas

In business since 1998

Credit card accepted

"We like their service. We haven't had any problems. They are very good. This was the first time we've had an alarm/security system in our home. The supplier is ADT. I like that I can set my alarm every night before I go to bed."
Protect Your Home Vehicle
Recommended by63%of homeowners
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Security Doors FAQs, answered by experts

You should always install cameras at exterior doors and windows. Other areas where you should place cameras are your front and back yards, the garage and driveway, common living areas, hallways and staircases, and the basement. Remember, you can start with a small Wi-Fi security camera system and always add more cameras if needed.

It depends on the type of sensor your home security system uses. If it’s a motion detector, any moving thing could set it off, from a roaming pet to a wind-blown curtain. Contact sensors would be triggered by the window being opened or moved. Also, be aware that any sensors placed too close to your vents could trigger false alarms whenever your heat or air conditioning is running.

Standard residential deadbolt locks come with a steel bolt that locks your door into place using a key (or keypad) on one side and a thumb turn on the other. When you lock it, the bolt slides into a strike plate on your door jamb to secure your door shut.

Hiring a professional ensures optimal camera placement, secure installation, and integration with existing security systems. Professionals ensure reliable operation and can offer system customization to suit specific security needs or preferences.

The main difference between different security sensor options is the type of motion each detects. A motion detector monitors obvious movements in hallways, entrances, and exits. On the other hand, a presence detector is more sensitive and captures smaller moves. A window sensor typically focuses on the opening and closing of the window, whereas a glass break sensor alarms you when a glass is broken.

The Sherman, CT homeowners’ guide to security door installation services

From average costs to expert advice, get all the answers you need to get your job done.