NBS Source
Traditional Spring Sash Windows - Triple

Application

Suitable for mid-range new developments, as well as replacing classic windows on non-listed buildings.

Description

Spring sash windows which offer a cost-effective alternative to traditional box sash designs.


Features and benefits:

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

General information

Color

Multiple options available. RAL classic range.

-

Finish

Available in dual finish, RAL classic range and Stain. Insert requirements.

-

Material

Timber

Shape

Rectangle

Special shapes available.

WarrantyDescription

10 year

Uniclass

Pr_30_59_98_96 Wood window unitsPrimary

CAWS

L10/10 Wood windows

L10/210 Wood windows

Specification data - Wood window units Enhanced data

Standard

To BS EN 6375-1, EN ISO 10077 and ISO 9001.

Third-party certification

FSC Certified.

Dimensions and configurations

As drawings.

Insert requirements.

As schedule.

Insert requirements.

Product performance

-

Weather performance

-

UK exposure category

To BS 6375-1, 1600 Pa.

Air permeability

To BS 6375-1, Class 4.

Watertightness

To BS 6375-1, Class 4A.

Resistance to wind load

To BS 6375-1, Class A4.

Durability

-

Operation and strength characteristics

To BS 6375-2.

Environmental

-

Background ventilation

Concealed trickle vent.

Acoustic performance rating

To BS EN ISO 717-1, ≤36 dB.

Thermal

-

Whole window U-value

To BS EN ISO 10077-1, ≥1.4 W/m²K.

Frame

-

Profile

Bespoke profile options available. Consult manufacturer.

Ovolo.

Lambs tongue.

Wood species

Engineered Accoya.

European oak.

Engineered hardwood.

Engineered redwood.

Appearance class

For opaque finishing: to BS EN 942, J10 for glazing beads, drip mouldings and the like. J40 or better for all other members.

Finish as delivered

Factory finished.

Preservative treatment to wood components

Preservative treated.

Ventilator

Trickle ventilator, EA 1700, 4400, 5000 mm².

Frame horns

Type H1 - H6.

Glazing or infill

-

Standard

Relevant parts of BS EN 1279.

Requirements

24 mm double glass unit.

4 mm tough/ 16 mm argon/ 4 mm tough low-E - As standard.

24.8 mm sound control double glazed unit.

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

Special order.

Hardware

Sashes are hung on spiral balances.

Operation

-

Type

Manual.

Electrical supply

None.

Fixing features

Project specific.

Weather seal (factory applied)

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

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.

Mullions

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

Sill section (height x depth)

54 x 160 mm.

MoistureContent

12–19%.

Glazing beads

Internally beaded.

Sill

Solid hardwood.

Sill projection

35 mm.

50 mm.

60 mm.

70 mm.

80 mm.

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Horns

Not required.

As drawing.

Horns

Not required.

Type H1.

Type H2.

Type H3.

Type H4.

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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

Available in dual finish, RAL classic range and Stain. Insert requirements.

-

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.

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Trickle ventilation

Not required.

Concealed through frame head trickle ventilator.

Child restrictor

Not required.

Angel lock.

Standard.

Traditional sash stop.

Environmental information

Country of material origin

Lithuania

Recyclability

Recyclable parts of product timber, glass, gaskets.

-

Digital objects

Platform Compatible Version Certified to
IFC
-

1

2.1
Revit

Revit 2017

1

2.1
Download now from NBS National BIM Library

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