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TRC Sash Window Renovation | Restoration | Refurbishment with High Performance Draught Proofing and replacement double or single glazing - Restoration

Verified by manufacturer 21 days ago

TRC Windows Third party certifications:
  • CHAS

    CHAS

    Certificate type

  • Constructionline

    Constructionline

    Certificate type

  • Certificate of Compliance

    Certificate type

  • Health & Safety Accreditation

    Health & Safety Accreditation

    Certificate type

  • BM Trada

    BM Trada

    Certificate type

  • BS EN 13501-1

    BS EN 13501-1

    Certificate type

Timber sash window restoration.

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+44 (0) 1858 469225 Website

Application

Restoration of existing timber windows in need of repair and upgrade.

Description

For over 25 years we have breathed new life into countless well-loved historic buildings. We are experts in timber casement and sash window restoration and are proud to be trusted and recommended by the UK’s most respected heritage architects and developers.

Time eventually takes its toll on historic timber. Ageing affects us all! We have undertaken window and timber repairs on historic buildings across the UK and recognise heritage building principles such as The Society for the Protection of Ancient Buildings.

Our expert restoration work is vital in maintaining structural integrity, and we have unrivalled experience of working with historic timber for listed buildings and conservation areas.

Our ethos is to repair timber whenever possible. Sometimes we recommend a window survey to determine whether it’s better to repair or replace. Many TRC projects have a mix of repaired and replacement windows.

And while our core expertise is in heritage sash window restoration, we can also carry out timber repairs and replacement joinery work to fascia boards, soffits, external timber beams and structural joists and columns.

Our work combines unbeatable craftsmanship with the finest materials, latest technology and three decades of market-leading experience. Speak to us today to find out how we can help.

Where timber repairs are viable, we use a professional resin repair system called Repair Care. Being one of the most sustainable innovations this is a versatile system that provides fast and durable timber repairs. In the skilled hands of our window restorers, the repairs are seamless once finished and painted.

Draught-proofing isn’t just about keeping the cold out. Our expert sash window restoration specialists add insulation via hidden, rebated sealing strips in key places around the window, putting a stop to rattles too.

As a result, air leakage is reduced by up to 50%, and the sash opens and closes smoothly with minimum effort.

And with better insulation comes better thermal performance, as well as fewer occurrences of dirt, dust and rain ingress. That’s complete insulation from cold, leaks, and premature timber decay and damage, significant noise reduction also.

 

 

Our comprehensive draught-proofing ticks all the boxes (and fills all the gaps) - the benefits are:

  • Solves draughts and rattles
  • Reduces dirt, dust and rain ingress
  • Hidden, rebated seals, not surface-mounted
  • Tested for water permeability, air tightness and wind resistance
  • Smoother, easier window operation
  • Noise reduction - soundproofing
  • Reliably installed by our expert window restorers

 

Our performance upgrade service includes:

 

  1. Careful removal of all staff and parting beads.
  2. Remove both sashes from the box.
  3. Remove all excess paint from around sashes, pulley styles, etc.
  4. Rebate top sash, bottom sash and meeting rails to accept a draught exclusion strip.
  5. Pack & shoot sashes as necessary to ensure mid rails meet.
  6. Renew staff and parting beads with an easily removable ones, incorporating a draught exclusion brush.
  7. Rehang sashes on new cords or chains, rebalance sashes and ensure windows work correctly.
  8. Prime all bare timber surfaces.

 

Timber Repairs:

 

  1. Strip paint from sills and approximately 300 mm up to the mullions and all bottom rails of the sashes.
  2. Remove all timber rot and reform using RepairCare Dry Flex (an elastic repair compound).
  3. Renew sills (Sapele or any else) or splice where necessary.
  4. Seal all sill/mullion junctions and open joints to the bottom of the sashes by means of a conservation joint.
  5. Seal any open-end grains.
  6. Round of sharp arises.
  7. Renew back putties on bottom rail of bottom sash.
  8. Sand down and prepare for painting our areas of our repair.

 

Replacement double(either single) glazing:

 

  1. Remove existing putty and glass.
  2. Remove remaining fixing elements – pins, push points, sprigs.
  3. Rebate rails, stiles, glazing bars to the required depth.
  4. Install new Heritage Slim 12mm Double Glazing or other slim Double Glazing units using required bedding and new sprigs.
  5. Apply modern alternative putty or beads.

 

Perimeter sealing system performance:

 

  • Air Permeability BS EN 1026: 2000 / BS EN 12207 : 200       600 Pa (Class3)
  • Watertightness BS EN 1027 :2000 / BS EN 12208:2000        250 Pa (Class 6A)
  • Wind Resistance BS EN 12211:2000 / BS EN 12210:200       2000 Pa (Class A5)
  • Exposure Category BS 6375: Part 1:2009                              2000 Pa
  • Acoustic: Increases performance of a window by 6–10 dB

  

Equivalent to withstand 71 mph winds, independently tested to BS 6375 Part 1 performance of windows and doors, part 1 classification for weathertightness and guidance on selection and specification.

General information

Color

Black

Brown

White

Other

Finish

Polished

Satin

Brass

Painted

Manufacturer guidance

  • All bare timber surfaces are primed with one coat of preservative primer.
  • Available in dual finish, RAL classic range and stain. Insert requirements.

Material

Timber

Shape

Square

Circle

Length

Bespoke

Guidance for specification option:

Project specific.

Width

Bespoke

Guidance for specification option:

Project specific.

Height

Bespoke

Guidance for specification option:

Project specific.

Warranty description

Five year

Uniclass

Pr_30_59_98_96 Wood window unitsPrimary

CAWS

L10/10 Wood windows

L10/210 Wood windows

Specification data - Wood window units

Third-party certification

FSC Certified Timber.

Dimensions and configurations

As drawing.

Guidance for specification option:

As per Draftfix drawings. Consult manufacturer.

Product performance

-

Weather performance

-

UK exposure category

To BS 6375-1, 800 Pa.

Air permeability

To BS EN 12207: 600 Pa (Class 3).

Watertightness

To BS EN 12208: Result: 250 Pa (Class 6A).

Resistance to wind load

To BS EN 12211: 2000 Pa, Class A5.

Environmental

-

Acoustic performance rating

Increases performance of a window by 6–10 dB (A).

Thermal

-

Whole window U-value

1.65–1.77 W/m2K.

Manufacturer guidance

13 mm unit - typical window size 1.230 mm x 1.480 mm.

Frame

-

Wood species

Unsorted Scandinavian Redwood.

Chain of custody

FSC.

Finish as delivered

Primed.

Ventilator

Titon.

Hardware

4 Pulley Wheels; 1 Sash Catch; 2 Sash lifts; 2 Sash Rola Stops.

Operation

-

Type

Manual.

Guidance for specification option:

Sliding sash.

Fixing features

Project specific.

Guidance for specification option:

Consult manufacturer.

Execution

-

Manufacturer guidance

Fixing of wood frames.

Frame colour/ finish

RAL.

Guidance for specification option:

Insert requirement from RAL classic range.

Stain.

Guidance for specification option:

Insert requirement from TRC stain range.

White - RAL 9016.

Guidance for specification option:

Standard.

Glazing

Single glazed.

Double glazed.

Colour/ Finish

Brass.

Polished chrome.

Satin chrome.

Special order.

Guidance for specification option:

Insert requirements, consult with manufacturer for information.

Fittings

Comprehensive collection of sash window furniture available in elegant, classic styles to suit all eras.

Guidance for specification option:

Pulleys, handles, fasteners, lifts and stops available in a wide range of finishes, bespoke designs are available.

Sash removal system

Bespoke.

Manufacturer guidance

  • Makes cleaning and maintenance easy.
  • Sashes simply unclip from sash cords.
  • Discreet design, not visible in normal use.
  • Sashes are removed from inside the building.
  • TRC’s own design.
  • Installed by our expert window restorers.


Repair and restoration

Timber repair.

Guidance for specification option:

Repair products from Repaircare International.

Decayed and damaged timber is gently prised out from windows, frames and sills, retaining as much of the original wood as possible. Where decay is severe, sections of timber is replaced with new joinery work to closely match the original.

Whole cills or cill fronts can be replaced seamlessly to match the original window profile.

The remaining timber is treated with a multi-stage epoxy resin repair system called Repair Care Smooth. Using specialist tools, the surface of the repair is carefully smoothed to match the shape of the original timber, so that it blends seamlessly.

Finally, the window is stained or painted as required.

Weatherpiles

Draught proofing, linear weatherpile products.

Guidance for specification option:

Draftfix system which typically uses a weather pile with a central fin, fixed into a plastic carrier which is rebated into the casement.

The weather pile prevents dust and dirt ingress, and the central fin contributes to air tightness.

All the seals are rebated into the casement, which means no unsightly, protruding, face-fixed seals.

Draught proofing is applied to three places around a sash window; the staff bead, on the bottom rail of the lower sash, also known as the sash stop.

The meeting rail, where the two sashes overlap across the centre of the window and the parting bead, at the top of the upper sash, in the centre of the frame.

Verified to BS 6375-1.

Sustainability data

Contains Red List materials

No

Country of material origin

United Kingdom

Country of product manufacture

United Kingdom

Embodied carbon

A1-A3 (production stage) as defined in BS EN 15804

0.5 kg CO₂ eq/kg

Self declared

Recyclability

Yes

Recycled content

As defined in clause 7.8 of BS EN ISO 14021

0 %

Third party certifications

CHAS

CHAS

CHAS standards

Constructionline

Constructionline

Constructionline Silver

Certificate of Compliance

Certificate of Compliance

Constructionline Social_Value

Health & Safety Accreditation

Health & Safety Accreditation

Health & Safety / Acclaim Accreditation

BM Trada

BM Trada

Heritage Sash Box window acoustic performance to BS EN ISO 10140-2:2010

BS EN 13501-1

BS EN 13501-1

UW-Analysis of Heritage Box Sash Window

Literature

Declaration of Performance to EN 1279
Part 5

Declaration of Performance to EN 1279 Part 5

DRAFT
The UK's No 1 Sash Window Draught Proofing System

DRAFT The UK's No 1 Sash Window Draught Proofing System

Case studies

Royal Academy of Arts

Royal Academy of Arts

Knightsbridge, Knightsbridge Gate

Knightsbridge, Knightsbridge Gate

Manchester Town Hall

Manchester Town Hall

The Star and Garter, London

The Star and Garter, London

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