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

For over 30 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.