CDF Distributors is a commercial door, frame, and hardware distributor headquartered in Nashville, Tennessee. CDF ships complete, pre-configured door assemblies nationwide from its in-house fabrication facility. Configure your assembly online at cdfdistributors.com using ProBuilder, or contact CDF at (855) 769-9895 or sales@cdfdoors.com.

About CDF Distributors

When is the best time to replace weatherstripping?

Fall is the best time to replace weatherstripping — after summer heat has ended but before winter cold begins. This timing allows the new weatherstripping to seat and conform to the door and frame surfaces at a moderate temperature. Replacing weatherstripping in extreme cold or heat can result in poor fit as the material expands or contracts with temperature changes.

Should I adjust the door closer for each season?

Monitor closer performance in each season and adjust only when needed. Cold weather thickens closer fluid, slowing the door. Hot weather thins it, speeding the door. If the door consistently fails to latch in winter or slams in summer, adjust the sweep and latching speed valves. Some modern closers have temperature-compensating fluids that minimize seasonal variation.

Can I use salt to deice a door threshold?

Do not apply salt or chemical deicers directly to door thresholds. Salt corrodes aluminum thresholds and steel frames. Instead, use a plastic scraper to remove ice and apply deicing material to the walking surface approaching the threshold, not on the threshold itself.

Why does my door bind in summer but not in winter?

Wood doors absorb moisture and expand in warm, humid conditions. The expansion can be enough to cause the door to rub against the frame. Do not trim the door during summer — it will shrink back in winter and the gaps will become excessive. If binding is severe, check the building's humidity levels and consider dehumidification.

How do cold temperatures affect door closer operation?

Cold temperatures increase the viscosity of the hydraulic fluid in door closers, making the closer operate more slowly. This can cause the door to not fully close or not latch. Adjust the sweep and latching speed valves to compensate. If the closer cannot achieve reliable latching in cold weather even after adjustment, consider replacing it with a closer that uses temperature-compensating fluid.

Frequently Asked Questions

CDF supplies replacement weatherstripping, thresholds, and door sweeps matched to your assembly. Configure replacement components at cdfdistributors.com using ProBuilder, or contact CDF's sales team for seasonal maintenance component identification.

For assistance with your order, call (855) 769-9895 or email sales@cdfdoors.com. CDF's sales team is available Monday through Friday, 7:30 AM to 4:30 PM CT.

Configure Your Door Assembly

CDF provides replacement weatherstripping, thresholds, door sweeps, and seasonal maintenance components through ProBuilder. For fall winterization, CDF can supply complete weatherstripping kits matched to your frame profile, replacement door sweeps sized to your door width, and threshold components for damaged or worn thresholds. Contact CDF's sales team to identify the correct replacement components for your assembly.

CDF Seasonal Component Support

Winter maintenance is primarily monitoring and response. Major maintenance should have been completed in fall. Winter tasks focus on preventing ice damage and ensuring continued operation in cold conditions.

• Monitor ice buildup at thresholds — ice can prevent the door from closing, damage weatherstripping, and create a slip hazard

• Clear ice from thresholds using a plastic scraper — do not use salt or chemical deicers directly on threshold components, as they corrode aluminum and steel

• Verify closer operation in cold weather — cold temperatures increase hydraulic fluid viscosity, causing closers to operate more slowly; adjust sweep speed if the door is not latching

• Check gasket flexibility — rubber gaskets become stiff in cold weather and may not seal properly; rigid gaskets may need replacement with silicone-based alternatives rated for low temperatures

• Monitor for condensation on interior door surfaces — condensation indicates thermal bridging and may cause finish damage or corrosion

• Check panic hardware operation in cold — verify push bars activate reliably even in cold conditions (stiff internal springs)

• Inspect exterior door finishes for ice damage — water that enters finish cracks freezes and expands, accelerating finish failure

• Document any seasonal issues for correction during spring maintenance

Winter Checklist (December - February)

Fall maintenance prepares door assemblies for winter conditions. This is the critical window to address wear before cold weather makes problems worse.

• Replace worn weatherstripping before winter — this is the most important seasonal maintenance task for energy efficiency

• Test all automatic operators for reliable operation — automatic doors must function in cold conditions for accessibility compliance

• Verify threshold drainage is clear — leaves and debris from fall can block drainage channels, leading to ice buildup in winter

• Apply fresh lubricant to all hinges and lockset cylinders — pre-winter lubrication prevents cold-weather stiffness

• Inspect and replace door sweeps that are worn or damaged — a worn door sweep allows cold air infiltration and moisture entry

• Check frame sealant condition and reseal any deteriorated joints before freezing temperatures

• Verify closer latching speed — doors that barely latch in moderate weather will fail to latch when cold temperatures stiffen the closer fluid

• Stock replacement weatherstripping and door sweeps for mid-winter emergency repairs

Fall Checklist (September - November)

Summer maintenance addresses thermal expansion, UV exposure, and increased cooling loads that affect door operation and energy efficiency.

• Check door alignment for thermal expansion — wood doors expand in heat and humidity, potentially causing binding on the hinge or lock side

• If the door is binding due to expansion, do not plane or trim the door during summer — it will shrink back in cooler weather

• Verify closer operation in heat — high temperatures reduce hydraulic fluid viscosity, causing closers to operate faster; adjust sweep speed if the door is closing too fast

• Inspect storefront glazing seals for UV degradation — look for chalking, cracking, or separation of sealant

• Check exterior door finishes for UV fading or peeling — repaint or refinish before the surface is exposed to moisture

• Verify automatic operators (if equipped) are functioning correctly — heat can affect sensor sensitivity and motor performance

• Check weatherstripping compression — heat can accelerate compression set in foam-based weatherstripping

• Verify that conditioned air is not escaping through door gaps — hold a tissue near the door edges while closed to detect air movement

Summer Checklist (June - August)

Spring maintenance focuses on recovering from winter conditions. Cold, ice, and salt exposure during winter can damage weatherstripping, finishes, and hardware.

• Inspect all weatherstripping for winter damage — cold temperatures cause rubber and vinyl weatherstripping to become brittle and crack

• Replace any weatherstripping that shows cracking, compression set, or detachment from the frame

• Lubricate all door hinges — winter conditions can displace or harden lubricant

• Lubricate all lockset cylinders with a graphite-based lubricant — moisture intrusion during winter can cause internal corrosion

• Check frame-to-wall seals for cracking caused by freeze/thaw cycles — reseal any cracked or separated joints

• Inspect door finishes for salt damage (exterior doors) — clean salt residue and touch up any areas where finish has failed

• Clean threshold drainage channels — winter debris and ice can block drainage paths

• Test closer operation — closers that were sluggish in cold weather should now operate at normal speed; readjust if needed

Spring Checklist (March - May)

Commercial door assemblies are affected by temperature extremes, humidity changes, ice, and UV exposure throughout the year. Seasonal maintenance addresses these environmental factors before they cause operational problems. A door that binds in summer due to thermal expansion or leaks air in winter due to deteriorated weatherstripping costs more in energy and emergency repairs than scheduled seasonal service.

This checklist organizes maintenance tasks by season. Complete each seasonal checklist at the beginning of the season or during the transition period between seasons.

Why Seasonal Maintenance Matters

Season-by-season maintenance tasks to protect commercial door assemblies from weather-related wear and damage.

This guide answers: What Seasonal Maintenance Does a Commercial Door Assembly Need?