Open window during a home window replacement project
ENERGY STAR Partner & GAF Certified Contractor

Energy-Efficient Window Replacement Engineered for Delaware Homes

Best Construction, Inc. installs Low-E glass replacement windows designed to eliminate drafts, reduce utility costs, and deliver measurable thermal performance. Our family-owned team has served Kent and New Castle Counties for more than 30 years, with the owner present at every installation.

Draft Elimination and Measurable Utility Savings

Best Construction, Inc. evaluates every window replacement project against documented performance standards, ensuring homeowners receive a system that performs to specification in Delaware's variable climate.

Draft Reduction

Multi-Point Sealing Systems

Modern sash and frame assemblies incorporate compression seals and weatherstripping engineered to close the gaps that allow air infiltration in aging window units.

Reinforced Frame Construction

Insulated frame cavities and multi-chambered profiles interrupt thermal conduction, eliminating the cold and hot spots commonly reported near original single-pane windows.

Utility Savings

Up to 12%

Reduction in Annual Energy Costs

Homeowners replacing single-pane or worn double-pane windows with ENERGY STAR-qualified units commonly document double-digit reductions in heating and cooling expenditure.

Lower HVAC Load

Reduced Mechanical System Strain

Thermally efficient windows reduce the heating and cooling burden placed on HVAC equipment, extending system service life and moderating utility demand during peak seasons.

All replacement windows installed by Best Construction, Inc. utilize Low-E glass technology, which applies a microscopically thin, transparent coating to control solar heat transfer without compromising natural light. This technology is a primary contributor to the draft elimination and energy cost reductions documented across our completed installations.

Window Styling Choices

Best Construction, Inc. offers a full range of window configurations, each evaluated for its aesthetic contribution and functional performance within a given room and exposure.

Two white wooden double-hung windows

Double-Hung Windows

Two independently operable sashes provide flexible ventilation control at the top and bottom of the frame, along with tilt-in sashes that simplify cleaning. A versatile choice for traditional Delaware home facades.

White wooden framed sliding glass window

Sliding Windows

Horizontal-glide sashes operate on a track system, offering a low-maintenance, space-efficient solution for rooms where an outward-swinging sash is impractical, such as over countertops or patios.

Brown wooden framed casement glass window

Casement Windows

Crank-operated sashes seal tightly against the frame when closed, compressing the weatherstripping for superior resistance to air infiltration — a strong option for maximizing thermal performance.

Living room filled with furniture and large bay windows

Bay & Bow Windows

Multi-panel configurations extend outward from the exterior wall, increasing interior floor space and natural light while framing panoramic views. A distinguishing architectural feature for living and dining rooms.

Not Sure Which Style Is Right for Your Home?

A member of our team will evaluate your home's exposure, framing, and architectural style before recommending a configuration during your free estimate.

Request a Free Estimate

Thermal Efficiency Ratings for Delaware's Climate

Selecting replacement windows requires an objective evaluation of published performance data. Best Construction, Inc. reviews the following ratings with every homeowner before installation.

U-Factor

U-Factor measures the rate of non-solar heat transfer through a window assembly. Lower U-Factor values indicate stronger insulating performance — a critical specification given Delaware's cold winters and humid summers. Best Construction, Inc. selects products with U-Factor ratings suited to the Mid-Atlantic climate zone.

Solar Heat Gain Coefficient (SHGC)

SHGC quantifies the fraction of solar radiation admitted through a window as heat. A moderate SHGC balances winter solar gain against summer cooling load, a specification our team calibrates based on each home's orientation and sun exposure.

ENERGY STAR Certification

ENERGY STAR-certified windows meet U-Factor and SHGC thresholds established by the U.S. Environmental Protection Agency for the Northern-Central climate zone that includes Delaware. Best Construction, Inc. documents ENERGY STAR compliance on every replacement window project.

As a GAF Certified and Owens Corning Preferred Contractor, Best Construction, Inc. maintains ongoing training on manufacturer specifications and current energy-code requirements applicable to Kent and New Castle Counties. Every window replacement estimate includes documented U-Factor, SHGC, and ENERGY STAR data for the products recommended for a given home.

Dual Warranty Coverage

Best Construction, Inc. provides two distinct layers of protection on every window replacement project — coverage for the product itself and coverage for the quality of our installation.

Manufacturer Defect Warranty

Every window installed by Best Construction, Inc. is backed by the manufacturer's warranty covering material and product defects, including glass seal failure, hardware malfunction, and frame integrity — terms vary by product line and are provided in writing prior to installation.

Best Construction Workmanship Warranty

Independent of the manufacturer's coverage, Best Construction, Inc. warrants its own installation labor, addressing issues arising from fit, sealing, or workmanship. As a family-owned company with the owner present at every project, we stand behind the accuracy of our installation directly.

Claims Process

Homeowners submit a warranty claim by contacting our office directly. Our team inspects the reported issue, determines whether it falls under manufacturer or workmanship coverage, and coordinates resolution — with the appropriate manufacturer or our own crews — at no cost to the homeowner where covered.

Request a Free Window Replacement Estimate

Submit your project details and a member of our team will contact you to schedule a no-cost, on-site evaluation. Best Construction, Inc. provides documented U-Factor, SHGC, and ENERGY STAR data with every estimate.

  • No-obligation, on-site assessment
  • Financing available with approved credit
  • Licensed, insured, and GAF Certified
Close-up view of a newly installed energy-efficient window

Improve Comfort and Lower Energy Costs With Certified Window Replacement

Best Construction, Inc. has served homeowners throughout Kent and New Castle Counties for more than 30 years. Contact our team to schedule your free, no-obligation window replacement estimate.