Old black front entry door in Newmarket before replacement

Signs the hardware needs service

  • A deadbolt or cylinder is difficult to turn, loose, damaged or unreliable.
  • The lock works poorly because the bolt and strike no longer align correctly.
  • A failed deadbolt, cylinder or compatible component needs replacement.
  • A new residential deadbolt or lock cylinder installation is required.
Modern front entry door installed in Newmarket with sidelight glass beside it

What we check, repair and install

  • Review of the door, existing lock preparation, deadbolt, cylinder, strike and alignment.
  • Repair or adjustment of serviceable residential locking hardware within the approved scope.
  • Replacement of confirmed failed deadbolts, cylinders or compatible components.
  • New compatible lock installation, alignment and key or thumbturn operation testing.

Hardware repair or replacement is likely when

Adjustment or repair is appropriate when the deadbolt, cylinder, strike and door preparation remain serviceable.

When a new deadbolt or cylinder is needed

Replacement or new installation is considered when the locking hardware is worn, damaged, incompatible or no longer reliable.

Parts, compatibility and property details
Parts and systems
Deadbolt · Lock cylinder · Latch / bolt · Strike · Thumbturn / key cylinder · Door preparation
Typical properties
Homes · Condos · Residential rental properties
Standards and requirements
Manufacturer installation requirements for compatible residential locking hardware · Applicable safe-egress requirements for the residential opening
Need help with this problem?Call or send photos and we will confirm the next step

Hardware diagnosis and install sequence

  1. 01

    Review the full door, lock edge, strike, cylinder and reported operation problem.

  2. 02

    Confirm door alignment, existing preparation and the exact hardware condition.

  3. 03

    Complete the approved repair, replacement or new deadbolt or cylinder installation.

  4. 04

    Test bolt travel, locking, key or thumbturn operation and door closure.

Completed projects for this service

1 project

View all project categories

Questions about Deadbolt & Lock Cylinder Repair, Replacement & Installation

Can a deadbolt or lock cylinder be repaired?

Sometimes. We check the hardware, bolt travel, strike and door alignment before confirming repair or replacement.

Can you replace a deadbolt or cylinder without replacing the door?

Yes, when the existing door preparation is serviceable and compatible with the replacement hardware.

Do you install new residential deadbolts?

Yes. We can install a compatible deadbolt or cylinder after the door preparation, backset, alignment and selected hardware are confirmed.

What if the door or frame is the real problem?

Use Front Entry Doors or the symptom-first door page when the slab, frame, hinges or strike alignment needs complete-opening assessment.

Confirm hardware compatibility before replacing parts

Send photos and a short note. We will review the issue and recommend the next step.

DoorWin Google Reviews

Martin 4 reviews • 1 photo
★★★★★

Great price

I had a foggy window and was looking for some one to replace it for a fair price , their team showed up the same day for an estimate and got a fair price compare to other “big” companies, they did an amazing job got a new glass installed within a week , really recommend ! :)

Repair wait time
0–1 hr

Curtis Savage 8 reviews
★★★★★

I hired DoorWin services to replace two cracked glass windows for a unit at my triplex. An exterior porch window and interior stairwell window I just needed the panes of glass replaced and not the entire frame . DoorWin was happy to do the job. Unlike some other companies who wanted to replace the entire frame at a higher cost. They were very quick with a quote and were able to perform the job on an extremely tight timeline that I had to unexpectedly move up. Very professional. Friendly. Dependable. Competitive prices. Took away all materials and left a clean worksite. Would highly recommend and will work with them again if I need another window repair.

Ike Kvapil 6 reviews • 4 photos
★★★★★

Max at DoorWin completed a professionally executed job on our front door while being a pleasure to deal with...would recommend him for any services their company provides.

J1330i 2 reviews
★★★★★

Guys, thank you again for the excellent services!! Extremely fast and professional at a fair price...thanks again!!!

Nicole Seahra Local Guide • 62 reviews • 19 photos
★★★★★

Doorwin Services alongside Alex were amazing. Came in same day. Went above and beyond. Thanks so much!

Anastasiia Dashkevych 7 reviews
★★★★★

Great experience with the window replacement. The team was professional, efficient, and the quality of work exceeded expectations. Everything was completed on time and looks amazing. Highly recommend!!!!!wont be disappointed:)

Amir Malek 5 reviews
★★★★★

Had an amazing experience with Doorwin Services for my metal door installation. The quality of work, attention to detail, and professionalism were top notch from start to finish. Big thanks to Maksim for all his hard work and help throughout the process — everything was installed perfectly and the final result looks great. Highly recommend Doorwin Services if you want quality work done right.

yarin danan 9 reviews • 4 photos
★★★★★

Excellent service. I needed help with a broken window. They did everything quickly and efficiently. I recommend them

Oleksandr Branytskyi 4 reviews • 2 photos
★★★★★

Excellent service from start to finish. The work was completed professionally, quickly, and with great attention to detail. The technician gave us several options on how to strengthen and improve the glass unit, and we chose the best solution. Everything looks great now. Highly recommend!

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