NBS Source
List your products
Description

Heritage sash windows constructed to match box sash windows crafted more than a century ago. The sash windows, with the classic weight-and-pulley mechanism, are a suitable choice for replacement windows in listing buildings, whilst also suiting high-end architect-led new developments.

Traditional putty is used externally to secure high-performance Slim Sightline double glazing. Available single or double glazed, the authentic-looking Slim Sightline double glazing has good acoustic and thermal performance. Solid glazing bars are supplied as standard.

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

Echo the style of historic windows, good for refurbishment projects, single or double glazing available

Shape

Rectangle

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

Heritage 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

Solid bars

24 x 45 mm ovolo

As drawing

Finish

Dual finish

Insert requirement.

RAL classic range

Insert requirement.

Stain

Insert requirement.

Glazing -
Type

14 mm double glazed Slim Sightline (8.5 mm) unit

Standard, 4 mm/ 6 mm argon/ 4 mm low-E externally glazed using Heritage hand-faced putty.

12 mm double glazed Slim Sightline (8.5 mm) unit

4 mm/ 4 mm argon/ 4 mm low-E externally glazed using Heritage hand-faced putty.

6 mm toughened single glass externally glazed

Using Heritage hand-faced putty.

Single glazed, 4 mm thick toughened single glass, externally glazed

Using Heritage hand-faced putty.

Perimeter spacer bars

White

Standard.

Black

Trickle ventilation

Not required

Concealed through frame head trickle ventilator

Child restrictor

Not required

Angel lock

Standard.

Traditional sash stop

Standard product features

Frame:

100 x 140 mm (lining width x frame depth), manufactured using mortise and tenon joints, glued and mechanically fixed.

Sash:

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

Mullion/ transom:

200 mm wide (130 mm for triple sash with fixed outer sash).

Staff/ parting beads:

Timber.

Wood moisture content:

12–19%.

Glazing beads:

External traditional putty glazed.

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 cords or chains, operating over pulleys and counterbalanced with lead weights.

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.
  • Acoustic: ≤36 dB.
  • 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
PlatformCompatibleVersionCertified to
IFC
- 1 2.1
Revit
Revit 2017 1 2.1
Download now from NBS National BIM Library
Similar products from TRC Windows