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Medeco Deadbolt Installation: The Atlanta Owner’s Guide
Medeco deadbolt installation in Atlanta typically runs $340-$620 for a complete Grade 2 or Grade 3 unit, including the cylinder, strike reinforcement, and labor, with same-day service available when you call before 2 PM. We stock Medeco Biaxial, M3, and X4 cylinders on our trucks, along with Schlage and Kwikset equivalents for mixed-brand homes. Most Atlanta owners discover their Medeco deadbolt is failing when the key starts catching at 45 degrees in humid summer months, or when the thumb turn grows stiff after a winter temperature swing warps the door jamb.
Which Medeco Models This Applies To
Medeco deadbolts fall into three series you’re likely to find on Atlanta homes: the legacy Biaxial (keyway stamped “Medeco” with angled sidebar cuts), the M3 (same keyway with an added slider for pick resistance), and the X4 (Medeco’s ANSI Grade 1 commercial line, common on office conversions in Old Fourth Ward and Decatur). The deadbolt body itself, the part that throws the bolt into the frame, is model-specific in backset (2-3/8″ or 2-3/4″) and faceplate width (1″ or 1-1/8″).
Check the edge of your door for a stamped model number, or remove the interior thumb turn and photograph the cam orientation. Biaxial and M3 deadbolts use a right-hand or left-hand cam that must match the door swing; the X4 uses a reversible cam but requires a different strike box depth. We carry OEM Medeco deadbolt bodies and cylinders, plus Medeco-compatible aftermarket cylinders from GMS and Ilco that meet the same UL 437 pick-resistant standard at a lower price point. For a Medeco system with master-keying or an existing key schedule, OEM is the only path; for a standalone residential deadbolt, the aftermarket cylinder installs without modification and keys to the same blank.
Signs Your Medeco Deadbolt Installation Is Failing
- The key sticks or requires jiggling at the 10-o’clock position. This usually means the bottom pins have worn flat spots from grit tracked in on Atlanta’s clay-heavy soil, or the sidebar springs have lost tension after years of cycling. The Medeco sidebar rides in angled grooves; when those springs weaken, the sidebar drags instead of snapping into place.
- The thumb turn rotates but the bolt does not extend fully. The deadbolt tailpiece has likely cracked at the cam slot, or the bolt itself is binding against a misaligned strike plate. In Buckhead and Virginia-Highland, we see this after foundation settling shifts door frames by 1/8″ or more.
- The exterior cylinder spins freely when the key is turned. The set screw that locks the cylinder to the deadbolt housing has backed out, or the housing threads have stripped from overtightening during a previous installation. A spinning cylinder provides zero security; the bolt can be retracted with a flathead screwdriver.
- The key works in warm weather but not in cold. Brass cylinders expand and contract with temperature; if the plug-to-housing tolerance was already tight, a 30-degree Atlanta January night can seize the mechanism. We measure plug clearance with a dial indicator and ream or replace the housing if it’s out of Medeco spec.
- The bolt face shows scoring or the strike plate is dented inward. Someone has attempted forced entry or used the deadbolt as the primary latch, slamming the door against an un-reinforced jamb. The bolt is hardened steel and usually survives; the strike plate and jamb framing do not.
Replacement Cost & What’s Included
| Service | Typical Range | What’s Included |
|---|---|---|
| Medeco deadbolt installation, existing door prep | $340-$460 | OEM or aftermarket deadbolt body, cylinder, strike reinforcement plate, labor, written scope |
| Medeco deadbolt installation, new door or non-standard prep | $480-$620 | Above plus bore alignment, jamb reinforcement, extended lip strike if needed |
| Medeco cylinder rekey to existing key | $45-$75 per cylinder | Pin kit labor, key duplication, key control card update |
| Strike/jamb reinforcement only | $85-$140 | Box strike, 3″ screws, door frame repair as needed |
The range depends on three factors: whether we’re swapping a like-for-like deadbolt or drilling new holes in a solid-core door, whether the jamb needs a wrap plate or longer screws to meet the 1″ throw requirement, and whether you need the cylinder keyed into an existing Medeco key system. Every quote is delivered in writing before we start, per Haven Standard Clause 1: the price on the phone is the price on the invoice. The 365-Day Done Right Promise covers labor and materials; if the bolt binds or the keyway loosens, we return and make it right.
DIY or Call Us?
There is no dangerous spring tension in a Medeco deadbolt, so an owner with a Phillips head and a tape measure can safely remove the interior thumb turn to inspect the tailpiece or photograph the cylinder for identification. What goes wrong in DIY is the door prep: Medeco deadbolts require a 2-1/8″ bore and a 1″ crossbore at precise centerline alignment; a handheld drill and a borrowed hole saw usually yield an egg-shaped bore that lets the cylinder loosen over time. We also find strike plates installed with the original 3/4″ screws, which pull out of pine jambs with one kick.
If your door already has a clean bore and you’re swapping a Medeco for a Medeco, DIY is feasible. If you’re upgrading from a standard deadbolt, or if the door is metal, fiberglass, or thicker than 1-3/4″, call us. We’ll quote the full job on the phone, dispatch a background-checked technician with a documented photo record, and leave you with a written warranty. The name on the van is the warranty.
FAQs
In Atlanta’s climate, a properly installed Medeco deadbolt typically lasts 15-20 years for residential use, though the cylinder may need rekeying after 8-12 years as pin wear accumulates. Humidity accelerates corrosion in the sidebar springs; we lubricate with Houdini Lock Lube, not graphite, which cakes in high moisture. Call (470) 944-6813 if your key is sticking - early rekeying extends the housing life.
Sometimes: a sticky keyway can be cleaned and repinned, a loose set screw can be replaced, and a binding bolt can be realigned. But a cracked tailpiece, a stripped housing, or a cylinder with excessive plug wear requires replacement; Medeco does not sell individual tailpieces or housings to end users. We stock both repair parts and complete units, and we’ll tell you which path costs less before we start.
A straightforward swap on a prepped door takes 30-45 minutes. A new installation with jamb reinforcement, bore drilling, and strike alignment runs 90 minutes to 2 hours. We schedule a 2-hour window and call when we’re en route.
Yes. We carry Biaxial and M3 single-cylinder and double-cylinder deadbolts in satin nickel and oil-rubbed bronze, plus X4 Grade 1 units for commercial applications. If you need a finish or backset we don’t have on hand, we’ll source it from our distributor in Doraville and return the next business day - no additional trip charge. Novak Lock & Security Atlanta is an independent service provider, not affiliated with Medeco.
Written by Daniel Novak, Owner, Novak Lock & Security Atlanta at Novak Lock & Security Atlanta, serving Atlanta and nearby areas.