FORTWELL
FORTWELL 100 casement window open in a minimalist coastal living room
Fortwell 100 Series — Casement
Fortwell 100 Series · Windows

Casement

Hinged at the side and cranked outward, pulling shut against a compression seal all the way round.

Best for: Rooms that need real airflow without breaking the glass line — kitchens, bedrooms, anywhere facing a breeze.

Hover the drawing to see how it opens.

Overview

A casement swings out on a side hinge and pulls closed against a compression seal, which is why it is the tightest-sealing operable window in the collection. Paired with fixed units it gives an elevation controlled airflow without breaking the glass line. Multi-point hardware locks the sash at several points along the jamb.

Design PressureThe wind load a unit is tested to hold, in pounds per square foot.
±65 psf
U-FactorHow much heat passes through the whole unit — lower is better.
0.30 – 0.48
STCSound Transmission Class — higher numbers mean a quieter room.
32 – 38
Impact RatingLarge and Small Missile Impact — resistance to windborne debris.
Large & Small Missile
Tested Size
32" × 52"

Is this the right system?

Choose it when

  • You want the tightest-sealing operable window we make
  • The full opening should clear for ventilation
  • There is room outside for the sash to swing

Consider instead

  • Awning — if the window must stay open in the rain.
  • Horizontal Sliding — if nothing may project into a walkway or terrace.

Pairs with

Configurations

  • Single casement

    One outswing sash, left or right hand.

  • Paired casement

    Two sashes meeting at a shared mullion.

  • Casement with fixed

    Operable sash flanking a fixed lite in one frame.

  • Casement with transom

    Fixed lite above the operable sash.

Glazing

  • Impact Laminated (standard)

    Heat-strengthened lites with a structural interlayer. Large and Small Missile Impact, HVHZ approved.

  • Low-E Insulated

    Insulating unit with a solar-control coating to reduce heat gain without dimming the view.

  • Acoustic Laminated

    Thicker interlayer tuned for airport, highway and dense urban sites.

  • Tinted & Reflective

    Grey, bronze and blue-green body tints, or a reflective coating for west-facing elevations.

Finishes

  • Class I Anodized

    Clear, champagne, medium bronze and black — a hard, integral finish for coastal exposure.

  • Architectural Powder Coat

    AAMA 2604 polyester finish in the standard Fortwell range, including matte black and warm grey.

  • Custom RAL

    Any RAL or custom-matched colour to project specification, minimum quantities apply.

Performance & Construction

Operation
Side-hinged, outswing
Frame depth
3-1/4" (100 Series)
Sightline
2-3/4" frame and sash stack
Thermal break
Polyamide strut thermal break through frame and sash.
Hardware
Multi-point lock with concealed hinges; folding or crank operator.
Screens
Interior-mounted roll-form or fibreglass mesh screen.
Design pressure
±65 psf
Air infiltration
≤ 0.06 cfm/ft²
Water resistance
12 psf
U-factor
0.30 – 0.48
SHGC
0.20 – 0.55
STC
32 – 38
Tested glass
1/4" HS + 0.090" Saflex PVB + 1/4" HS
Max tested size
32" × 52"

Applications

  • Coastal
  • HVHZ
  • Residential

Documents

  • Miami-Dade NOA 24-0226.02Notice of Acceptance — valid through November 2029
  • Specification sheetSizes, sections and performance data — PDF · on request
  • CAD detailsHead, jamb and sill details — DWG · on request
  • Installation guideAnchorage, flashing and sealant sequence — PDF · on request
  • WarrantyLimited warranty terms — read online

Related Systems

Next step

Confirm the approval and the sizesNOA numbers, design pressures, tested sizes and glass.Continue

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