Window Film & Seasonal Draft Kits
Window film and seasonal draft kits are the cold-weather fix that installs over single-pane, old aluminum-frame, basement awning, and historic-property windows when full replacement is not the right answer this season — clear shrink film heat-shrunk to clarity, magnetic interior acrylic or polycarbonate storm panels custom-cut per opening, and aluminum-frame seasonal kits on basement awnings — from $150 per window with the spring removal included. A properly installed shrink-film kit cuts the U-value of a single-pane window roughly in half for the winter; a magnetic interior storm panel does the same year after year. The bedroom that drops to 56 degrees overnight because of one single-pane window the previous owner never replaced, the basement awning windows that pour cold air across the floor of the playroom, the historic double-hung windows in a Phinney Ridge craftsman that the city's preservation rules will not let you replace with vinyl — the Department of Energy estimates 25 to 30 percent of residential heating energy is lost through windows, and on older homes the single-pane share carries most of that loss. We install in October and pull in April.
Service
How Window Film & Draft Kit Install Works
Six steps from the per-window product match to the scheduled spring removal — the actual sequence we follow on every shrink-film and magnetic-storm-panel install.
Per-Window Product Match
Walk every drafty window and pick the right product per opening — shrink film for budget single-pane and rentals, magnetic interior storm panels for historic-preservation homes where exterior storms are prohibited, aluminum-frame seasonal kits for basement awning windows, rigid-foam plugs for off-season AC sleeves. The wrong product on the right window fails in weeks.
Measure and Surface Prep
Measure every opening precisely — shrink film tape lines run along the interior trim, magnetic storm panels need exact-fit acrylic or polycarbonate cuts. Wipe trim with a dry cloth, test the double-sided tape on an inconspicuous spot on delicate historic finishes, switch to softer adhesive if the test pulls finish.
Shrink-Film Application
Apply double-sided removable tape along the interior of the window trim, lay the polyethylene film over the tape with a small overlap on every side, press to bond. The film creates a still-air pocket between the prime window and the film layer, which is the actual insulation mechanism — still air is one of the better insulators available.
Heat-Shrink to Clarity
Run a hair dryer or heat gun across the film, holding 4 to 6 inches off the surface and moving steadily — the film tightens and every wrinkle pulls flat. Properly heat-shrunk Duck Brand or 3M Indoor film reads newspaper through it. Trim film excess with a razor along the tape line.
Magnetic Storm or AC Sleeve Variant
Magnetic storm panels need magnetic strip applied to the prime window stop on first install, then the custom-cut acrylic or polycarbonate panel mates to it. AC sleeve plugs are rigid foam cut to the sleeve interior with foam-tape perimeter seal, slid into place when the unit comes out in October.
Spring Removal Scheduled and Logged
Every install closes with a scheduled spring removal visit on the calendar — late March or early April. Shrink film is pulled and disposed without trim damage, magnetic storm panels are removed and packed into labeled storage cases for next October, basement awning kits come down, AC plugs come out. No homeowner ever fights a film kit off a window with a razor in May.
Window Film & Draft Kit Pricing
Final pricing depends on window count, window type (standard double-hung, basement awning, picture window, irregular), and whether shrink film, magnetic storm panels, or both are specified. Spring removal is included on every install. Request a free estimate for an accurate quote.
Tell us which windows are drafty and whether replacement is on the table — we will recommend the right scope.
Why Choose a Professional for Window Film & Seasonal Draft Kits?
Most homeowners hear "window film" and picture the wrinkled, hazy plastic kit a previous owner stapled over the basement windows in 1998. The current generation of shrink-film kits is genuinely clear when heat-shrunk properly — you can read the newspaper through it — and the math on a single-pane window is real. Magnetic interior storm panels are even better and last decades. The right answer depends on the window, the rest of the house, and whether you are 5 years from replacement or never replacing. After dozens of Seattle window-kit installs on craftsman, Tudor, and historic-preservation homes, we know which products work, which fail in three weeks, and how to tell you on the booking call whether this is the right fix for your house or whether you should just budget for replacement.
Estimate
Tell us the window count, the window types (standard double-hung, basement awning, picture, historic), the rooms you want to address, and whether replacement is on the table for the next few years — we will send back a clear estimate and the honest recommendation.
Customer Reviews
Recent window film and draft kit reviews from verified Seattle customers.
1928 craftsman in Phinney Ridge, original windows we cannot replace because of historic restrictions. Tech measured every window in October and installed magnetic acrylic interior storm panels on the four bedroom windows. Nursery temperature stabilized — was running 6 degrees colder than the rest of the house, now matches. He stored the panels for us last spring and re-installed this October. They look almost invisible from inside.
Basement awning windows on our 1965 split-level — single-pane, broken latches, the original installer never sealed them. Tech installed the aluminum-frame kits in October. The basement playroom went from being unusable in winter to being a real room. He pulled the kits in April without any damage to the trim.
We knew we wanted to replace the bedroom windows but the contractor was booked 8 months out. Tech installed shrink-film kits on the four worst windows as a winter stopgap — said they would buy us one season. They did exactly that, no wrinkles, no falling off, and the bedrooms were warmer. Pulled them in April when the new windows arrived.
Through-wall AC sleeve in our 1958 condo. The unit comes out every September and the hole was leaking cold air all winter. Tech cut a rigid-foam plug to fit, weatherstripped the perimeter, popped it in. The bedroom holds temperature now. Removed it in May when we put the unit back in.
He told me upfront that shrink film was the wrong answer for our windows because the trim was wood-paneled and the tape would damage the finish. Recommended magnetic storm panels instead — $200 more per window but they will last 15 years and they will not damage the trim. Appreciated the honest comparison; some contractors would have just installed the cheap option.
Frequently Asked Questions
Common questions about window film, magnetic interior storms, and seasonal draft kits.