Mercer Island Undrained-Wall Window & Door Replacement — Insured

Call (833) 519-6467 or send the form and we schedule a site visit in Mercer Island, usually within a couple of days. You get a written, itemized free estimate with materials and scope spelled out — no verbal ballpark, no pressure, and no charge whether you hire us or not.

We also serve Newcastle, WA and the rest of north King County. Everything starts at the Shoreline Window Pros homepage.

Shoreline Window Pros covers the same range of work in Mercer Island that we do in Shoreline — nothing is carved out because the address is a few miles up the road:

• Double-Hung Windows — The double-hung is not native to this housing stock, and knowing that changes the conversation. Shoreline's postwar plats were built with wood casements, awnings and fixed picture units, then re-fitted in the 1980s with horizontal sliders.
• Casement and Awning Windows — The crank-out casement and the top-hinged awning are the native window types of this housing stock, and they are still the technically better choice on most Shoreline elevations. That is not nostalgia.
• Horizontal Sliding Windows — Horizontal sliders are the most common replacement window in Shoreline and the one we inspect hardest. They are simple, cheap to make, easy to operate from a countertop, and they carry a design feature that a wet climate punishes: the sill is a track, and a track is a trough.
• Bay and Bow Windows — A bay or bow that already exists can be rebuilt well. Adding one to a face-sealed postwar wall is a different proposition: it creates a roof, two return walls and a projecting floor where none existed, and each is a new way in for water.
• Picture and Architectural Windows — Nothing performs better than fixed glass: no hardware, no moving seal, and the lowest air-leakage figure printed on any label. The trade is that it never opens, and in a house built before any ventilation requirement that trade has consequences.
• Basement and Bedroom Egress Windows — Shoreline is a daylight-basement town. The lots slope, the postwar builders took advantage of it, and the result is thousands of lower levels that are half above grade and half below.

See the full list of Shoreline services, or call (833) 519-6467.

Mercer Island sits in King County with a population of roughly 25,748 residents (2020 Census), close enough to Shoreline that crews move between the two constantly. Local landmarks and corridors residents know well include the Luther Burbank Park shoreline, the Island Crest Way spine.

Local knowledge is not a marketing line here. Mercer Island properties share soil, weather, permit rules and construction eras with the rest of King County, and a window contractor who works the area weekly already knows what fails locally and what holds up. That is the difference between a bid and an accurate bid.