Close the Gaps

Window and Door Installation in Seattle, WA

A window that sticks, a draft around an exterior door, or an opening that no longer seals well can affect more than appearance. Proper replacement depends on fit, framing, flashing, weatherproofing, trim, and the condition of the surrounding wall. Luna Park Construction LLC has worked in residential construction since 1996, installing windows and doors as complete openings, not isolated products.

01   The Opening Matters

A New Window or Door Is Only as Good as the Installation Around It

Replacement products arrive with fixed dimensions and specifications, but the house around them is rarely perfect. Existing framing, sill conditions, exterior cladding, trim, flashing, and interior finishes all influence how a new unit needs to be fitted and sealed. As a general contractor in Seattle , Luna Park Construction LLC coordinates window and door installation with the surrounding construction. That becomes especially important when replacement work overlaps with siding, interior trim, framing changes, or broader remodeling.

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Off your first project. New clients booking window or door installation with Luna Park Construction LLC receive 5% off contracted labor. Mention it when you call.

What Has to Work Around Every New Opening

Tall antique glass-panel doors installed in a custom frame
Carved wood double entry doors with wrought-iron glass panels

How an Old Opening Becomes a Finished Installation

01

Check the Existing Opening

Dimensions, framing condition, trim, sill areas, operation problems, and surrounding finishes show what the replacement will actually involve.

02

Match the Unit to the Space

Window or door size, style, operation, glass, hardware, and performance needs are considered against the opening rather than selected in isolation.

03

Remove Without Creating Extra Damage

The old unit and necessary trim are taken out carefully so the surrounding wall can be evaluated before the replacement goes in.

04

Prepare the Perimeter

Framing corrections, flashing, weatherproofing, and other opening preparation are completed before the new unit is permanently secured.

05

Set, Seal, and Adjust

The window or door is positioned, fastened, sealed, and checked for alignment, smooth operation, clearances, and hardware function.

06

Refinish the Opening

Interior and exterior trim, transitions, sealant details, and affected finishes close the installation back into the surrounding wall.

Replacement Cost Depends on More Than the Window or Door Price

Two products with similar dimensions can create very different installation scopes. Damaged framing, difficult access, wider patio openings, exterior trim replacement, siding transitions, flashing needs, interior finish work, and changes to the original opening can all add labor. A line-itemed estimate should reflect the opening as it exists, not just the unit being purchased.

Seattle Openings Have to Keep Moisture Outside the Wall

Rain exposure makes flashing and weatherproofing especially important around windows and exterior doors. Small gaps or weak transitions can allow moisture to travel behind siding or trim, where the problem may not be immediately visible. Installation should account for how water sheds around the entire opening, not simply how the new unit looks from the street. Homeowners coordinating exterior upgrades can pair this work with our siding replacement services , while our See Our Completed Projects page offers a look at finished construction work from Luna Park Construction LLC .

The Opening Is Finished Only When the Edges Are Finished Too

New doors and windows often leave trim, casing, or transition work around the perimeter. Our finish carpentry and trim work can carry those details into the surrounding room so the replacement looks integrated rather than simply inserted into the wall.

Get your openings priced

Free walkthrough, written estimate, and 5% off your first project.

Service snapshot

Common Projects

Replacement windows, entry doors, and patio doors.

Installation Focus

Fit, flashing, sealing, framing, and trim.

Performance Goal

Better operation and weather protection.

Estimate Details

Free, line-itemed, and based on scope.

Window & Door FAQs

Questions to Ask Before the Old Units Come Out

Sizing, framing, flashing, energy performance, and surrounding finishes can all affect replacement work. These answers cover five practical considerations.

How do I know when a window should be replaced?

Replacement may be worth considering when a window is difficult to operate, damaged, noticeably drafty, deteriorated around the frame, or no longer performing as intended. The surrounding opening should also be checked because not every problem originates with the window unit itself.

Sometimes, but it depends on the frame condition, dimensions, alignment, threshold, and planned door type. An opening that is damaged, out of square, or being significantly changed may require framing or jamb work rather than a simple door-slab replacement.

Window flashing helps direct water away from vulnerable parts of the opening and into the exterior drainage system. Sealant alone should not be expected to manage every moisture pathway, especially where the window connects with siding, trim, and the wall assembly.

Energy-efficient windows and doors can improve thermal performance when the products and installation suit the opening. Glass type, frame construction, air sealing, fit, and surrounding insulation all influence performance, so the window itself is only one part of the result.

Often, yes, provided the proposed unit works with the opening, structure, floor level, exterior access, and available wall space. Changing the size or type of door may require additional framing, siding, trim, flashing, or interior finish work.

Close the Gaps Properly

Replace More Than the Product

A new window or door should open properly, close cleanly, and meet the surrounding wall without awkward gaps or unfinished edges. Tell Luna Park Construction LLC which openings need attention, and we can start with the condition that is actually there.