Sheffield Fusion Welded Vinyl Windows

The ultimate choice for maximum beauty, strength and energy savings.

Sheffield Windows
Sheffield Fusion Welded Vinyl Windows
Sheffield Vinyl Windows

Sheffield's superior performance starts with innovative engineered components that provide the basis for superior energy savings.

The multi-chamber design of the Sheffield Window helps trap dead air to produce an effective insulating barrier, while fusion-welded frames and sashes provide superior structural strength and create a permanent barrier against air and moisture infiltration. A special multi-layer weather stripping and a superior sash interlock system offer additional barriers to air infiltration adding up to a greater energy savings – and lower utility bills.

Sheffield's Intercept™ Warm Edge Spacer System with high-efficiency insulated glass creates an effective barrier that helps to prevent heat loss during winter or heat gain during the hot summer months. The quality construction ensures that it won't rot, peel, split, corrode or pit. The premium virgin vinyl (PVC) forms the extra-thick walls of Sheffield's sturdy frames and sashes. It's tough, durable and other than an occasional washing, requires minimal maintenance.

To ensure easy opening and closing of the Sheffield Window, the Constant Force balance system and E-Gard operating hardware will continue to operate perfectly, even after decades of regular use. A sloped sill helps prevent water and air infiltration while maintaining the timeless detailed appearance characteristic of double-hung windows. Beveled mainframes on double-hung, sliding and casement windows provide a finished appearance complementing every home style.

Energy Efficiency

Fusion welding assures lasting quality and performance.

Sheffield Fusion Welded Windows


  1. Vinyl frames and sashes will never chip, peel, crack or warp. Tough, solid virgin vinyl, with color formulated throughout so the beautiful luster lasts.
  2. Airtight insulating chambers help reduce conduction and cut high energy bills.
  3. Quad 4 weather stripping at the header adds even more protection from the elements.
  4. Insulated glass unit with optimal air space improves year-round performance.
  5. PPG Intercept™ Warm Edge Spacer System maximizes window performance and longevity.
  6. Interlock at sash meeting rails create a super-tight seal against air infiltration, providing security, comfort and well being.
  7. Metal reinforcement adds strength at the meeting rails.
  8. Drop-in glazing provides energy efficiency as well as interior aesthetic appeal.
  9. Compression bulb seal at the sill creates an all-season weather barrier.
  10. Sloped sill ensures quick water drainage to the exterior.
  11. Hidden screen track produces clean lines and added beauty.
Sheffield Fusion Welded Vinyl Windows

Decorative Options

For your home improvement project, there's no need to limit your design to a standard traditional look. Alside offers an array of grid and glass options to fit any style, any need and any design.

Interior Grids

Classic grids are available in complementary white or beige, with Colonial, Diamond, Prairie and Double Prairie patterns.

Contoured Colonial grids feature a modeled "cut wood" look and are available in complementary colors and in matching wood grains.

Sheffield also offers narrow Colonial grids with a bright-brass finish.

All grids are enclosed within the insulated glass unit for easy cleaning.



Sheffield Colonial Interior Grid
Sheffield Colonial White Interior Grid
Sheffield Colonial Beige Interior Grid


Sheffield Contoured Beige Interior Grid


Sheffield Contoured White Interior Grid


Sheffield Diamond Interior Grid


Sheffield Narrow Brass Interior Grid


Sheffield Prairie Interior Grid


Sheffield Double Prairie Interior Grid


Sheffield Contoured Cherry


Sheffield Contoured Dark Oak


Sheffield Contoured Light Oak


Cut Glass

Sheffield Windows are also available in a variety of cut and polished glass patterns.



Sheffield Colonial Cut Glass


Sheffield Diamond Cut Glass


Sheffield Double Prairie Cut Glass


Sheffield StarCrest Cut Glass
Sheffield StarCrest II Cut Glass
Sheffield StarCrest III Cut Glass

Authentic Beveled-Leaded Stained Glass

These options add elegance and distinction to any home.

All leaded glass is hand-crafted using hand-cut glass, crystal bevel clusters, and hand-soldered camings.

Available in four attractive cherry glass styles to suite your architectural decor.

Select a caming metal to match your taste - brass, pewter, or lead.



Sheffield St Joseph Leaded Glass
Sheffield Jackson Leaded Glass
Sheffield Hanna Leaded Glass


Sheffield Vicksburg Leaded Glass


Sheffield Brass Caming Leaded Glass


Sheffield Lead Caming Leaded Glass


Sheffield Pewter Caming Leaded Glass


All Sheffield Windows are available in white or beige with an optional American Brown exterior.

Sheffield White or Beige

Performance Options

Make your home an energy miser.

ENERGY STAR® compliant ClimaTech® Insulated Glass

By Choosing CLIMATECH® INSULATED GLASS PACKAGE featuring PPG's Low-E Glass and Intercept™ Warm Edge Spacer System, you can help reduce your energy costs even more, while helping cut consumption of the fossil fuels that pollute our environment.

ENERGY STAR® compliant ClimaTech® Insulated Glass Package combines PPG's Low-E Glass with Argon Gas and Intercept™ Warm Edge Spacer System for added energy efficiency.

Lifetime Limited Warranty

Alside backs all Sheffield Windows with a Lifetime Limited Warranty, an assurance of quality and satisfaction.

Alside and Climatech are registered marks of Alside. Solarban is a registered mark and Intercept is a trademark of PPG Industries.