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Description

Spring sash windows which offer a cost-effective alternative to traditional box sash designs. They deliver classic style, but incorporate a simpler, more compact and modern spring balance mechanism in place of weights and pulleys.

Double-glazed as standard, they are available with safety glass, obscured glass, acoustic glass or solar control glass. Triple glazing is also available to special order. Twin gasketing ensures reliable weather containment. The windows are suitable for mid-range new developments, as well as replacing classic windows on non-listed buildings.

Bespoke windows and doors are available; consult manufacturer for details.

General information
Size

As drawing

Insert reference.

As schedule

Insert reference.

Material

Engineered Accoya

Engineered European oak

Engineered hardwood

Engineered redwood

Standard.

Finish

Dual finish

Insert requirement.

RAL classic range

Insert requirement.

Stain

Insert requirement.

Color

Colour from RAL classic range - standard, dual finish or stain - optional

Features

Modern spring balance mechanism, cost effective, triple glazing available, good weather containment

Shape

Rectangle

Uniclass 2015
Wood window units (Pr_30_59_98_96)Primary
Specification data - Wood window units
Product Reference

Traditional Spring Sash Windows

Size

As drawing

Insert reference.

As schedule

Insert reference.

Material

Engineered Accoya

Engineered European oak

Engineered hardwood

Engineered redwood

Standard.

Sill projection

35 mm

50 mm

60 mm

70 mm

80 mm

90 mm

100 mm

110 mm

Horns

Not required

As drawing

Horns

Not required

Type H1

Type H2

Type H3

Type H4

Type H5

Type H6

Windowboard groove

Required

Not required

Internal Glazing Bars and/or Perimeter Bead

18 mm lambs tongue type 2

18 mm ovolo profile type 2

22 mm lambs tongue type 1

22 mm ovolo profile type 1

External Glazing Bars

18 mm chamfered putty bar

22 mm chamfered putty bar

Finish

Dual finish

Insert requirement.

RAL classic range

Insert requirement.

Stain

Insert requirement.

Glass units

24 mm double glass unit

4 mm tough/ 16 mm argon/ 4 mm tough Low-E.

24.8 mm sound control double glazed unit

6.8 mm sound control laminated/ 14 mm argon/ 4 mm tough low-E.

Special order

Insert requirement, safety, obscured, acoustic or solar control glass options available.

Perimeter/Integral spacer bar

Black warm edge perimeter spacer and integral glazing bars within unit cavity

Matt chrome warm edge perimeter spacer and integral glazing bars within unit cavity

White warm edge perimeter spacer and integral glazing bars within unit cavity

Ironmongery

Antique brass sash fitch fastener, sash lifts, sash pulleys

Brass sash fitch fastener, sash lifts, sash pulleys

Oil rubbed bronze sash fitch fastener, sash lifts, sash pulleys

Polished chrome sash fitch fastener, sash lifts, sash pulleys

Satin chrome sash fitch fastener, sash lifts, sash pulleys

Satin nickel sash fitch fastener, sash lifts, sash pulleys

Special order

Selected Croft ironmongery with bespoke finish is available; consult manufacturer and insert requirement.

Trickle ventilation

Not required

Concealed through frame head trickle ventilator

Child restrictor

Not required

Angel lock

Standard.

Traditional sash stop

Standard product features

Frame:

55 x 160 mm (lining width x frame depth), manufactured using mortise and tenon joints, glued and mechanically fixed.

Sash:

39 x 55 mm top rail and stiles, 90 x 55 mm bottom rail, 45 x 55 mm meeting rail.

Mullion/ transom:

110 mm wide (70 mm for triple sash with fixed outer sash).

Sill section (h x d):

54 x 160 mm.

Staff/ parting beads:

Timber.

Wood moisture content:

12–19%.

Glazing beads:

Internally beaded.

Sill:

Solid hardwood.

Horns:

Solid feature horns to top sashes are included as standard.

Fittings:

A lockable fitch fastener and two finger pulls to the bottom sash.

Mechanism:

Sashes are hung on pre-tensioned constant force spiral balances.

Weather seal:

The window is fully weather sealed to BS EN 6375-1.

Performance:

  • U-value (to BS EN ISO 10077-1): ≥1.6 W/m²K.
  • Air permeability (to EN 1026:2000): Class 4.
  • Water tightness (to EN 1027:2000): Class 4A.
  • Wind resistance (to EN 12211:2000): Class C4.

Product Options

Finish:

Three coat spray applied factory finish using water based micro-porous paint/ stain.

Trickle ventilation:

Concealed through frame head trickle ventilator: 1700 mm², 4400 mm² or 5000 mm² air flow dependent on frame width.

Digital objects
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