Exterior Door Installation

Why Two Identical Doors Can Perform Completely Differently

You can buy the best door on the showroom floor and still end up with a leak. Installed wrong, it’s just a more expensive leak. An exterior door takes more day-to-day abuse than almost anything else on a building — people walking through it, weather hitting it, and the security expectations we put on a single opening. CCS installs entry doors as part of full turnkey builds and also as standalone upgrades, and in both cases the door itself is really only half of what matters.

What Actually Determines Door Performance

Here’s something most people don’t expect: two identical doors, installed by two different crews, can age completely differently over the years. The door slab itself is a manufactured product — its rating is whatever it is. What’s not standardized is the install. Was the rough opening actually prepped right? Did the sill pan tie into the wall’s weather barrier the way it should have? Was the unit shimmed plumb and square before anyone touched the trim? That’s usually where the real difference between a door that holds up and a door that leaks comes from.

It’s a little like buying a good car and having someone install the engine wrong. The door brand on the label doesn’t end up mattering much if the install underneath it was rushed. We’ve replaced plenty of “defective” doors over the years that turned out to be perfectly good doors installed without a sill pan or with flashing run in the wrong order.

Choosing the Right Door Type

If you’re not sure which category fits your project, it usually comes down to two questions: how much exposure is the door going to get, and how much upkeep are you actually willing to do? A high-traffic commercial entry calls for something tougher than a quiet side door on a residential addition, and a log home with a wood door is going to need attention a fiberglass door simply doesn’t.

How Exterior Doors Connect to the Rest of the Envelope

Door installation isn’t really its own separate job — it gets coordinated with siding and waterproofing, since the flashing around a door opening has to tie directly into the weather barrier running across the rest of the wall. We treat that as one continuous detail rather than handing it off between trades and hoping it lines up. That coordination is the part that’s easy to overlook when you’re just shopping for a door. A door crew working in isolation, without talking to whoever’s doing the siding or waterproofing, is exactly how flashing gaps happen. Keeping it under one roof means the person setting the door and the person running the weather barrier are working off the same plan, not guessing at where the other one left off.
Common Exterior Door Mistakes
FAQs

A single door replacement usually takes half a day to a full day, including removal of the old unit, flashing, and setting the new one. Multiple doors or a full commercial storefront system take longer depending on the number of openings.

In most cases, yes, if the existing rough opening is in good condition and close to standard size. We'll inspect the framing and flashing during the old door's removal to confirm before quoting a straightforward swap versus a full reframe.

Solid wood typically costs more upfront and requires ongoing maintenance, sealing and refinishing every few years, while fiberglass costs less initially and needs essentially no maintenance beyond occasional repainting. The gap widens over time once wood's upkeep costs are factored in.

Weatherstripping and hardware benefit from an annual check regardless of material, and wood doors specifically need periodic resealing to prevent moisture absorption. Fiberglass and steel doors need far less attention, mostly just occasional repainting or touch-up.

Sometimes. If the door slab itself is undamaged and the problem is isolated to flashing, weatherstripping, or hardware, a repair often makes sense. Water damage that's reached the surrounding framing usually means the opening needs to be addressed as part of the repair, not just the door.