Clients need proper flashing at the rough opening so water doesn't infiltrate behind the window — more window failures are caused by improper flashing installation than defective window products.
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What clients expect and what professionals need to know
Window installation (replacement) removes the existing window sash and frame, installs a new window unit into the existing rough opening using a full-frame or insert (pocket) replacement method, shims the window plumb and level in the opening, secures with fasteners through the nail fin or frame, and seals the exterior with self-adhering flashing tape at sill, jambs, and head, then caulks the joint between flashing and siding. Interior trim and insulation in the rough opening frame complete the installation.
Clients need proper flashing at the rough opening so water doesn't infiltrate behind the window — more window failures are caused by improper flashing installation than defective window products.
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Common questions from clients looking for Window Installation services
Full-frame replacement removes the entire existing window including the frame, allowing new flashing installation and inspection of the rough opening — best for older homes or when siding is being replaced. Insert (pocket) replacement keeps the existing frame, is faster and less expensive, but assumes the existing frame and flashing are in good condition.
Double or triple glazing with low-E coating reduces radiant heat transfer; argon or krypton gas fill reduces conductive heat transfer; a thermally broken frame prevents the frame itself from conducting heat.
Low-emissivity coatings on the glass surface reflect radiant heat back to its source — low-E2 coatings keep heat inside in winter; low-E3 coatings reduce solar heat gain in summer (solar heat gain coefficient below 0.25).
Failed seals (foggy between panes), broken hardware, significant frame rot, and visible air infiltration around the frame sash are repair triggers; old single-pane or fogged double-pane glass warrants replacement.
AAMA (American Architectural Manufacturers Association) certifies windows to performance grades for air infiltration, water resistance, and structural load — AAMA-certified windows have been tested independently, not just rated by the manufacturer.
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