A commercial entrance can look fine while the closer, latch, threshold and frame are already working against one another. The first cold week exposes the problem: the door drags, stays open, slams or needs extra force to release.

That is not only a heating or maintenance complaint. A door that cannot be opened, closed or secured predictably can create accessibility, egress and security risks.

Quick answer: A pre-winter commercial entrance inspection should check the door and frame alignment, hinges or pivots, closer, latch, lock, panic hardware, threshold, sweep, weatherstripping, glass, sealants, drainage and connected access control. Test the entrance under normal building pressure and confirm that it remains usable along the accessible route.

Commercial Entrance Symptoms and Likely Causes

Symptom	Likely cause	What should be checked
Door rubs the frame or threshold	Hinge or pivot wear, frame movement, thermal contraction or loose hardware	Door clearances, hinges, pivots, frame anchors and threshold
Door closes but does not latch	Weak closer, latch/strike misalignment, pressure or stiff seals	Closer, latch, strike, hinges, weatherstripping and air pressure
Door slams in cold or windy weather	Closer adjustment, wind load or stack effect	Closing and latching speeds, closer condition and vestibule pressure
Card reader approves access but door stays closed	Electric strike under load, lock fault or mechanical misalignment	Strike, latch, relay, hinges, closer and door pressure
Cold draft is felt around the opening	Failed sweep, gasket, sealant, threshold or frame joint	Perimeter seals, door bottom, glazing gaskets and wall connection
Water appears inside after snow or rain	Blocked drainage, failed sealant, threshold gap or poor slope	Weeps, sill, joints, flashing, entrance mat and exterior drainage
Fog appears between glass panes	Failed insulated-glass edge seal	Glass unit, glazing system and replacement requirements
Panic bar sticks or needs extra force	Wear, misalignment, corrosion or door pressure	Exit device, latch, rods, strikes, hinges and door movement
Lower hardware shows rust or white deposits	Salt, trapped moisture or damaged finish	Fasteners, pivots, threshold, frame base and drainage

1. Check the Door Within the Frame

A door is a moving panel held within a fixed opening. It works only when the clearances, pivots and hardware remain aligned.

Inspect the gap around the door. It should be reasonably consistent and match the door and hardware design. Warning signs include:

Top corner rubbing the frame
Door bottom scraping the threshold
Uneven gap at the latch edge
Loose or missing hinge fasteners
Pivot movement
Cracked frame joints
Door leaf twisting or bowing
Fresh metal marks around the strike
Glass door rails moving or separating

Why a Small Alignment Change Matters

The latch must enter the strike at the correct height and angle. If the door drops even slightly, the latch may hit the edge of the strike. The closer then has to force the door through that resistance.

Cold makes the margin smaller. Metal contracts, seals stiffen and lubricants become more resistant. A door that latched with little clearance in September may stop securing during a January cold snap.

Do not raise closer force simply to push a misaligned door into the frame. That can make the entrance harder to open and place more stress on hinges, pivots, locks and users.

ACS Systems provides commercial door, glass and storefront support for Toronto and GTA properties, including hollow metal, aluminum, glass, security and fire-rated openings.

2. Test the Closer Through the Full Closing Cycle

A door closer usually controls more than one phase of movement:

Main closing speed
Latching speed near the frame
Backcheck as the door opens
Delayed action where provided
Spring force

Test the door from several opening positions. Confirm that it closes without slamming and engages the latch without someone pulling it shut.

Look for:

Oil leaking from the closer
Loose closer body or arm
Bent arm
Sudden speed changes
Door stopping before the latch
Excessive opening resistance
Closer cover interfering with movement
Different behaviour between quiet and busy lobby conditions

Stack Effect Changes Door Pressure

In a heated multi-storey building, warm air rises and escapes through upper leakage paths. Replacement air is drawn through lower openings. This pressure difference—stack effect—can pull or push on lobby doors.

The entrance may therefore behave differently when:

Exterior temperature falls
Elevator or stair doors open
Exhaust systems operate
A second vestibule door is held open
Wind strikes the façade

A closer adjustment made during mild weather may not solve a pressure problem. The entrance, vestibule and building air balance may all need review.

3. Inspect Locks, Strikes and Exit Hardware

Security depends on the door reaching the fully closed and latched position.

Check:

Latch engagement
Strike alignment
Electric strike movement
Magnetic-lock status where installed
Mortise or cylindrical lock operation
Key-cylinder condition
Door-position contact
Request-to-exit device
Panic bar or exit device
Vertical rods and floor strikes
Fire alarm or access-control interface where applicable

Credential Approval Is Only One Step

A reader can accept a card and the controller can send the correct release command while the door remains closed. This occurs when the latch is pressing hard against the electric strike or when the strike cannot move through its full travel.

Test the physical opening after every access-control approval. Then allow the door to close and confirm that the system reports the correct secured state.

The Door Hardware, Access Control & Security Upgrades page covers closers, panic bars, hinges, thresholds, weather seals, readers and electric locking hardware as one opening.

Exit devices and fire-rated door assemblies should be serviced according to the approved building and fire-safety requirements. Do not block a latch, tape an exit device or prop open a fire-protection closure to solve an entrance complaint.

4. Review Thresholds, Sweeps and Weather Seals

The bottom of a commercial entrance takes the greatest winter abuse. Boots, carts, walkers and mobility devices carry grit, water and salt across the threshold throughout the day.

Inspect:

Threshold anchoring
Loose or raised edges
Door-bottom sweep
Perimeter weatherstripping
Torn or compressed gaskets
Salt buildup
Corrosion
Entrance-mat position
Water trapped between mat and threshold
Ice on the exterior approach

Seals Must Not Create an Access Barrier

Weatherstripping reduces drafts only when it contacts the door correctly. If it is too tight, folded or frozen, it adds opening force and may prevent latching.

A thicker sweep is not always the solution. The door bottom, threshold height, floor level and required clearance must be considered together. A raised threshold or curled mat can also become a trip and mobility barrier.

Keep de-icing chemicals away from hardware where practical and follow product requirements for the walking surface. Salt residue should be removed during regular cleaning rather than allowed to remain against aluminum, steel and fasteners.

5. Inspect Glass, Glazing Gaskets and Sealant Joints

Storefront systems move with temperature, wind and daily door use. Glass and aluminum expand and contract at different rates, while gaskets and sealants age under sunlight and moisture.

Look for:

Cracked or chipped glass
Loose glazing stops
Gaskets pulling away at corners
Shrunk or brittle gaskets
Failed perimeter sealant
Gaps at mullion joints
Water staining
Condensation at frame edges
Fog between insulated-glass panes
Corrosion around fasteners and framing

Fogging Has More Than One Cause

Condensation on the room-side surface can be caused by high indoor humidity, cold glass, cold aluminum frames or poor airflow. Fog trapped between panes usually points to a failed insulated-glass edge seal.

The correct repair depends on where the moisture is located. Replacing perimeter caulking will not repair a failed sealed glass unit, and replacing the glass alone will not stop water entering through a failed wall or frame joint.

ACS Systems’ Storefront & Glass Entrance Systems page covers aluminum frames, glass doors, vestibules, entrance repairs, weather seals and access-control coordination.

6. Check Drainage Before Water Begins Freezing

Commercial storefront and window systems often manage water through internal paths, weep openings and sill drainage. If those paths are blocked, water can collect inside the frame or spill into the building.

Check for:

Blocked weep openings
Sealant placed over intended drainage
Dirt and leaves in sill areas
Negative exterior slope toward the entrance
Downspouts discharging near the doorway
Snow-storage areas that direct meltwater toward the building
Water trapped beneath entrance mats
Staining below frame joints

During freeze-thaw cycles, trapped water expands as it freezes. Repeated movement can separate joints, displace gaskets and worsen small cracks.

Do not drill new drainage holes without confirming the storefront or window-system design. An incorrect opening can bypass internal seals and direct water into the wall.

For adjacent glazing and building-envelope concerns, review ACS Systems’ Commercial Windows, Curtain Wall and Window Wall Systems page.

7. Test the Entrance as an Accessible Route

An entrance check should include real use, not only visual inspection.

Confirm that:

The exterior route is level, firm and clear
Snow-storage plans do not block the approach
Mats remain flat and secure
The threshold does not create a barrier
Manual opening force is not increased by binding or tight seals
Door controls and readers remain reachable
The door provides enough time and space for passage
Connected operators and push buttons work where installed
The door closes without striking a slower-moving user
An accessible alternative is identified during repairs

A security improvement should not make the entrance harder to use. Moving a reader, adding a bollard or installing new door hardware can reduce clear floor space or force someone to stand within the door swing.

Where an automatic operator is part of the opening, the automatic door repair service can be coordinated with the mechanical door and storefront inspection.

The Canadian Edge: Follow the Entrance Through the Seasons

Autumn: Grit Finds the Moving Parts

Leaves, sand and grit collect around thresholds, floor strikes, pivots and mats. Removing them before snow arrives reduces abrasion and lets the door complete its travel.

Early Winter: Salt Starts Holding Moisture

Salt attracts moisture and remains in contact with lower hardware. Watch for white deposits on aluminum, rust on steel and green or blue corrosion near copper-containing parts.

Deep Winter: Contraction and Pressure Expose Weak Alignment

At -30°C, metal contraction, stiff seals and pressure differences can turn a small clearance issue into a door that will not latch. Test during a cold period if the problem appears only in winter.

Freeze-Thaw: Water Moves Through Small Gaps

Melting snow enters open joints during the day and freezes overnight. Repeated expansion can worsen sealant cracks, frame gaps and threshold movement.

Spring: Hidden Corrosion Becomes Visible

After winter, remove residue and inspect lower framing, pivots, fasteners and electrical connections. A door may start moving more freely while corrosion remains.

Ontario Accessibility and Building Code Considerations

Ontario’s 2024 Building Code came into effect on January 1, 2025. Its application to a specific entrance depends on the building, occupancy, construction date and scope of permitted work. Review Ontario’s current Building Code information.

CSA/ASC B651:23, Accessible Design for the Built Environment, addresses routes, doorways, controls, clear spaces and other accessibility features. Its use depends on project requirements and the authority reviewing the work.

A door problem can become an accessibility compliance risk when it:

Requires excessive force
Does not remain open long enough
Creates an abrupt threshold or mat edge
Blocks the accessible route
Places a reader or control outside a usable reach area
Leaves no accessible entrance during service

The AODA does not replace the Building Code or create one mechanical door-inspection schedule for every property. Ontario organizations do need to consider accessible customer service and notice when a facility relied upon by people with disabilities is temporarily unavailable. Review Ontario’s accessible customer-service guidance.

The Accessible Canada Act applies to federally regulated entities and includes the identification, removal and prevention of built-environment barriers.

Existing entrances may have been approved under earlier requirements. Do not use a new-construction checklist by itself to declare an older opening non-compliant. Review permits, drawings, renovation history and the requirements applying to the work.

Commercial Door and Storefront Pre-Winter Checklist

Door and Frame

Check clearances around the door

Inspect hinges, pivots and fasteners

Look for rubbing, sagging or frame movement

Test the door from several opening positions

Confirm the closer controls movement

Verify the door closes and latches without assistance

Locks and Exit Hardware

Test locks, latches and electric strikes

Test panic bars and exit devices

Confirm access-control release at the physical door

Check door-position monitoring

Review mechanical entry and egress

Confirm approved fire alarm and door interfaces

Threshold and Weather Protection

Inspect threshold anchoring and edges

Check the sweep and perimeter seals

Remove salt and grit buildup

Keep mats flat and clear of the door

Check the exterior approach for drainage and ice

Confirm weather seals do not prevent opening or latching

Glass and Storefront Framing

Inspect glass for cracks and chips

Check gaskets and glazing stops

Inspect perimeter sealant and frame joints

Check for water staining and condensation

Clear designed drainage and weep openings

Review fogged insulated-glass units

Accessibility and Records

Test the complete accessible route

Check readers and controls for obstruction

Confirm automatic controls where installed

Identify an accessible alternative during repairs

Record faults and seasonal conditions

Verify completed repairs under cold-weather conditions

Frequently Asked Questions

Why does a commercial door stop latching in winter?

Cold can contract metal and stiffen seals, while stack effect and wind change pressure across the door. Hinge or pivot wear may leave too little alignment margin for the latch and strike.

Can the door closer be adjusted to force the door shut?

Increasing force may hide misalignment and make the door harder to open. Check hinges, pivots, latch, strike, seals and building pressure before changing closer settings.

Why does the card reader approve access without releasing the door?

The controller may be working while the latch is pressing against the electric strike. Mechanical alignment, closer force, seals and air pressure should be checked with the access-control relay.

Does fogged storefront glass need replacement?

Fog between panes usually indicates failure of the sealed glass unit. Surface condensation may instead come from indoor humidity, cold framing or airflow. Confirm where the moisture is before choosing the repair.

How does salt damage commercial entrances?

Salt holds moisture against metal and electrical connections. It can contribute to corrosion around thresholds, pivots, fasteners, frames and low-mounted access-control hardware.

Is a hard-to-open entrance an accessibility issue?

It can be. Binding, tight seals, excessive closer force, raised thresholds and unstable mats can create barriers along an accessible route.

Schedule a Pre-Winter Commercial Entrance Inspection

If the entrance rubbed, leaked, failed to latch or needed repeated adjustment last winter, have the full opening inspected before cold weather returns.

ACS Systems supports commercial doors, glass entrances, storefront framing, door hardware, access control and automatic-door coordination across Toronto and the GTA. The inspection can review the door, frame, closer, lock, threshold, weather seals, glass and connected entry equipment.

Contact ACS Systems to schedule a commercial entrance inspection.

Trust Note From ACS Systems

This article provides general guidance for commercial, institutional and multi-residential properties. Door, glazing, fire-protection, egress, accessibility and security requirements vary by building, opening and approved design. Repairs and changes should be completed by qualified personnel under the codes, standards and manufacturer requirements that apply.