Garage Door Panel and Seal Repair in Rockville, MD

What garage door panels and seals do

A sectional garage door is built from horizontal sections joined by hinges, each carrying a roller on each side. The sections have to stay straight for the door to bend smoothly over the track. The bottom section carries the bottom seal in its retainer, and the side and top weatherstrip close the gaps around the frame.

In Rockville, the panels and seals take the winter head-on: salt and slush at the bottom, ice that freezes the seal to the driveway, and humidity that swells wood doors in summer.

Signs a panel or seal needs repair

• A dent or crease across a section Especially one that changes how the door moves.
• Rust along the bottom edge Where salt water sits against the steel.
• Swelling, sticking or rot on a wood door Worst after the humid months.
• A seal frozen to the driveway Or torn off its retainer.
• Daylight, drafts or water under the door The seal is flat, torn or the wrong size.

Panel damage by cause

Dents from cars and snow shovels

Steel raised-panel doors dent when a bumper catches the bottom section, and snow shovels and snowblowers ding it every winter. A small dent is cosmetic; a section creased across the middle loses its strength and cracks the hinges beside it.

Rust from salt and standing water

The bottom section sits in the salty water that melts off cars all winter. Once the paint chips, the steel rusts from the bottom edge up. Rust through the bottom of a section, or spreading into the section above, is usually where a new door starts to make more sense.

Swelling and rot on wood doors

Older homes in Rockville Town Center, East Rockville and the West End still have wood doors. Summer humidity swells the wood until the door sticks, winter dries and cracks it, and the bottom rail rots where it meets a wet slab.

One section or a new door

Door makers, matching sections and HOA rules

Most Rockville garages have steel sectional doors from the large makers, such as Clopay, Amarr and Wayne Dalton. A replacement section has to come from the same maker and model, with the same panel design, thickness and color, or it will not line up with the hinges. The technician reads the maker's label on the visit. In King Farm, Fallsgrove and other HOA communities, the approved style and color matter too.

Bottom seals and frozen doors

A frozen seal is the most common winter call that is not a spring. The seal freezes to the driveway overnight, the opener pulls, and either the seal tears off the retainer or the opener strains and bends the top section. A seal that has already flattened or torn lets in water, cold air, leaves and mice.

• Free a frozen door gently Clear snow and ice along the bottom first. Never use the opener to rip the door free.
• Choose the right profile Seals come in several shapes and widths to suit the retainer.
• Replace a rusted retainer A bent or rusted retainer will not hold a new seal.
• Check the slab An uneven slab may need a thicker seal or a threshold seal.

Insulated and uninsulated sections

Insulated doors have foam between two steel skins, rated by R-value, which keeps an attached garage warmer in January, stiffens the sections and quiets the door. An insulated door takes insulated sections; a single-layer door cannot simply be given one insulated panel.

You hear the price before the work. When the door is past repair, new garage door installation explains the choice, and there is more on garage door repair here in Rockville.

Caring for the door through the seasons

• Rinse road salt off the bottom Salt on the bottom section starts the rust.
• Touch up chips on steel Bare steel rusts quickly in the wet months.
• Reseal wood doors Before the summer humidity and again before winter.

Repairing versus replacing a single section

When a matching section is still made, swapping one section is usually the better value for a door that is otherwise sound. The old section comes out, the new one goes in with new hinges where needed, and the door is rebalanced, because a new section can weigh a little more or less than the old one. When no match exists, you hear what a repair to the damaged section can and cannot do before deciding.

Panel and seal questions