Window Installation & Replacement Services

Yes. Replacement windows are designed to fit into an existing window frame without disturbing the surrounding trim, siding, or interior finishes. New construction windows include a nailing fin that attaches directly to the wall framing and are installed before siding goes on. Using the wrong type for your project can result in air leaks, water infiltration, and added labor costs. Our window installation specialists will confirm the right product for your situation before work begins.

Yes. Modern replacement windows are significantly more energy-efficient than older single-pane or poorly sealed windows. Features like double or triple-pane glass, argon gas fills, low-E coatings, and insulated frames reduce heat loss and drafts, helping your home stay warmer in winter and cooler in summer. ENERGY STAR® certified windows, like our NOR'EASTER and Harvey Majesty Windows, are tested to meet strict thermal performance standards for cold-climate regions.

Look for windows with a low U-factor (0.27 or below), ENERGY STAR® certification for the Northern climate zone, and double or triple-pane glass with argon or krypton gas fills. Frame material matters too — wood, fiberglass, and insulated vinyl all perform well in cold climates. Our NOR'EASTER and Harvey Majesty Double Hung Windows are designed specifically for New England weather. Our window installation specialists can help you find the right replacement window for your needs and budget.

Not necessarily. Window replacement can be performed year-round, and our installation process is designed to minimize the time your home is open to the elements. That said, cold temperatures can affect caulking and sealant cure times, so proper technique matters. Our window installation specialists are experienced working in New England winter conditions and take the necessary steps to ensure a tight, weatherproof installation regardless of the season. It's also worth considering that replacing old, leaky windows with new airtight replacement windows typically delivers an immediate improvement in heat retention — the long-term energy savings of a properly sealed window far outweigh any temporary heat loss during installation.

Common signs that replacement windows may be needed include drafts when windows are fully closed, condensation between panes, warped or rotting frames, difficulty opening or closing, and rising energy bills. If the issue is a single broken pane or a hardware problem, a repair may be sufficient — we handle those too. Our window installation specialists offer free estimates and will recommend the right solution for your situation.

The cost of window replacement varies based on the number of windows, size, style, glass package, and installation requirements. Standard double-hung vinyl replacement windows are typically the most affordable option. Custom sizes, premium frame materials, and specialty glass packages are priced accordingly. We offer free, no-obligation estimates so you have a clear picture of costs before any work begins.

Yes, we can perform any window glass-related services you need, no matter how simple or complex.

Portland Glass services are always performed by our team of home window installation specialists.

Lead paint was used in more than 38 million homes before it was banned in 1978. This type of paint can create toxic dust when disturbed. The EPA’s Renovation, Repair and Painting (RRP) program was established to reduce lead contamination by training and certifying contractors to carry out simple lead-safe practices while on the job.

The purpose of the RRP Rule is to minimize lead-based paint exposure during painting, repair, and renovation activities. This is a key effort in reducing lead poisoning from home exposure due to lead contaminants. The RRP Rule also works to benefit adults and older children who are adversely impacted by lead-based paint dust exposure. Because lead poisoning can cause a wide range of behavioral, emotional, intellectual, and physical problems, this prevention-based program is a cost-effective solution.

R-value represents the resistance a material has to the flow of heat. The R-value measures a material’s insulation properties. The higher this value is, the greater the resistance to heat. Insulated glass has air pockets that help to increase its R-value.

U-value is an insulation rating for transparent objects that represents the amount of heat that escapes a surface, like a window. The lower the U-value, the better the insulation.

This type of glass is designed to reflect heat without letting warm internal air escape, which helps conserve energy.