Timber Sash Window Restoration & Accoya Sill Splicing (£280–£420).
Before a tin is opened, every sander connects to a sealed Mirka M-Class HEPA extractor so 99.97% of dust goes into a filtration bag—never your living room.
Commission a survey
02 / Case study · 1898 box-sashes
Six 1898 Box-Sash Windows Restored for £2,150 vs £11,400 Replacement
Six original box-sashes with rotten sills, snapped cords and rattling meeting rails. The replacement quote came in at £11,400. We kept every box frame, every pane of original glass and every brass pulley, and the itemised bill came to £2,150: under a fifth of the cost of replacement.
| Task | Breakdown / estimated cost |
|---|---|
| Rotten sill excavation | £420 |
| Hardware overhaul & brass pulleys | £320 |
| Draught-proofing & weatherseal | £580 |
| Splice and timber consolidation | £520 |
| Perimeter mastic & 3-coat microporous system | £310 |
| Total costs | £2,150 |
| Full replacement | £11,400 |
- Anchored specification
- Jesmond NE2 Victorian red-brick bay: original Crown glass & box frames retained intact.
03 / The splice
The Repair Care Level 3 Engineering Process
We splice 100-year-old rot-resistant Baltic pine with precision Accoya and elastic epoxy resin, keeping the original box frame intact.
Every splice is bonded in Repair Care Dry Flex 4, which stays elastic and moves with the old timber through Tyneside winters, and carries our 10-year guarantee.
- 01 / Survey & moisture mappingSills, stiles and bottom rails are probed and moisture-read; only soft or wet timber is marked for removal.
- 02 / Rout back to sound pineDecay is cut out to clean, dry heartwood. The sound original stays in the frame.
- 03 / Splice & bondPrecision-cut Accoya inserts are set in Dry Flex 4 epoxy, then planed flush to the original profile.
- 04 / Re-cord, seal & coatWaxed cotton cords, balanced weights, rout-fitted brush pile and a 3-coat microporous system.
04 / Dust-free method
Dust-free sash restoration method and guide tariffs
“99.97% of dust goes into a filtration bag—never your living room.”
01 / Preparation & coatings
Abranet sanding, Toupret filling and a 3-coat microporous system.
02 / Dust-free extraction
99.97% M-Class HEPA capture at the sanding head.
03 / Cost estimator
£280Sash windows from £280; spliced sills £350–£420.
04 / Postcode range
Serving NE1 to NE66, Hexham to the coast.
Conservation Area FAQ Ledger
Do I need consent to restore sashes in a conservation area?
Like-for-like repair of your existing timber sashes does not normally need planning permission, which is why conservation officers in Jesmond, Gosforth and Tynemouth favour restoration over replacement. Listed buildings are different: we check the listing first and supply a written method statement if consent is needed.
Will draught-proofing change how the windows look from the street?
No. The brush pile is rout-fitted into the staff and parting beads, so from outside you see the same slim original sections, glass and putty lines.
Can you keep my original crown glass?
Yes. Sashes come out whole and sound old glass stays in its rebates. Any cracked pane is replaced with matched cylinder glass and bedded in linseed oil putty.
How long does an Accoya splice last?
Repair Care Dry Flex 4 splices carry a 10-year guarantee. The resin stays elastic, so it moves with the old pine instead of cracking away from it.
05 / Who does the work
The Tyne Valley Team
Paul Rutherford founded the workshop in South Gosforth in 2004 and still surveys every window himself. Sam Elliott, our time-served joiner-decorator, cuts and bonds the Accoya splices at the bench in Unit 4, Haddricks Mill Trade Park.
No agency sub-contractors and no rip-outs: the two people who price your windows are the two people who restore them, one or two sashes a day, with the room vacuumed and handed back every evening.
06 / The written proposal
A fixed written quote
Paul prices from a 25-minute survey or 2–3 WhatsApp photos, and sends an itemised PDF quote within 48 hours. The figure on the quote is the figure on the invoice.