NJS Sash Windows

NJS Sash Windows NJS restores, renovates & repairs traditional wooden sash windows across Stamford, Rutland, Peterborough, Cambridgeshire & surrounding villages.

Expert craftsmanship for period homes, listed buildings & timber windows since 2005.

05/10/2026

POV: Restoring sash windows in an 1850 house — you never know what you’re going to uncover.

02/10/2026

Meet the Bruce Lee sash window! ☝️😂

Why the nickname? One finger is all it takes to lift it.

Up on the scaffold showing you how smoothly this traditional sash works after restoration. A properly balanced sash should be a pleasure to open.

Watch the reel to see it in action 👀

Got sash windows that stick or won’t stay open? Drop NJS Sash Windows a message.

📍 Stamford, Peterborough, Rutland & Cambridgeshire and surrounding villages

25/09/2026

Early start on a sash window restoration in Stamford this morning. The aim is to get this window repaired and working smoothly by the end of the day.

We repair and restore traditional wooden sash windows, including rotten timber, broken sash cords, sticking sashes and draughts. If your windows need attention, send NJS Sash Windows a few photos and we’ll take a look.

Sash window repairs and restoration in Stamford, Peterborough and the surrounding villages.

23/09/2026

Treated myself to a new Estwing hammer for our next sash window restoration in Cambridgeshire. Lovely bit of kit! My last hammer lasted 20 years, so this one’s got a lot to live up to.

NJS Sash Windows | Traditional Restoration Since 2005

Scaffolding is up and work is under way on a Georgian house in Elton, Cambridgeshire. We’re restoring the sash windows, ...
18/09/2026

Scaffolding is up and work is under way on a Georgian house in Elton, Cambridgeshire. We’re restoring the sash windows, keeping their traditional character while getting them working smoothly again.

NJS Sash Windows | Traditional restoration since 2005

13/09/2026

A small but important part of sash window restoration. The old pulley was stiff and squeaky, so we replaced it with a smooth new ball-bearing pulley. It’s improvements like this that free up your sash windows, so they glide properly and you’re not fighting with them every time you want some fresh air.

Sash window restoration across Stamford, Peterborough and the surrounding Cambridgeshire villages.

SASH WINDOWS: RESTORATION VS. REPLACEMENT – WHICH SHOULD YOU CHOOSE?If you own a period property, you’ve likely stood be...
30/08/2026

SASH WINDOWS: RESTORATION VS. REPLACEMENT – WHICH SHOULD YOU CHOOSE?

If you own a period property, you’ve likely stood beneath a draughty sash window and asked yourself the same question: Do I restore my sash window what I have, or bite the bullet and replace the whole thing?

We’ve put together a guide explaining sash window restoration vs replacement, including what can normally be repaired, when replacement makes sense, and what you should consider before making the decision.

Read the full guide — link in the comments.

SPIRAL BALANCE REPAIR FOR SASH WINDOWS – A COMPLETE HOMEOWNER'S GUIDEDoes your sash window refuse to stay open? Or does ...
17/08/2026

SPIRAL BALANCE REPAIR FOR SASH WINDOWS – A COMPLETE HOMEOWNER'S GUIDE

Does your sash window refuse to stay open? Or does it slam shut with a bang? You likely have a broken spiral balance.

At NJS Sash Windows (based in Etton,Cambridgeshire ), we repair more spiral balances than almost any other sash window problem. These clever mechanisms are common in late Victorian, Edwardian, and most 20th-century sliding sash windows. The good news? They can almost always be repaired – no need to replace the entire window.

NJS Sash Windows is proud to serve homeowners across a wide area of Cambridgeshire, Northamptonshire, and Lincolnshire, including:

Grantchester
Hemingford Abbots
Hemingford Grey
Houghton
Great Shelford
Little Shelford
Madingley
Coton
Haslingfield
Barrington
Bourn
Great Eversden
Little Eversden
Thriplow
Ickleton
Hinxton
Great Abington
Little Abington
Swaffham Prior
Swaffham Bulbeck
Fen Ditton
Horningsea
Duxford
Great Gransden
Eltisley
Kimbolton
Buckden
Elton

Peterborough & surrounding villages:
Etton, Helpston, Barnack, Wansford, Glinton, Peakirk, Northborough, Maxey, Marholm, Ufford, Bainton, Castor, Ailsworth, Sutton, Eye, Thorney, Whittlesey, Werrington, Paston, Walton, Bretton, Orton (Longueville, Waterville, Southgate, Goldhay), Hampton, Yaxley, Stanground, Farcet, Old Fletton.

Stamford & surrounding villages:
Stamford town centre (All Saints, St George's, St Mary's, St John's), Uffington, Tallington, Barnack (again), Easton on the Hill, Wothorpe, Collyweston, Duddington, Tinwell, Ryhall, Belmesthorpe, Essendine, Great Casterton, Little Casterton, Tickencote, Pickworth, Careby, Holywell.

Also covering:
Oundle, Wittering, Elton, Nassington, Apethorpe, King's Cliffe, Blatherwycke, Southorpe.

Use the link in comments for more information ℹ️

12/08/2026

PRE-PURCHASE SASH WINDOW SURVEY & CONDITION REPORT BUYING A PERIOD HOME?

You've found your dream period home. The proportions are perfect, the character is undeniable, and those original sash windows catch the light just right.
But here's the question every buyer dreads: what's really going on behind that fresh coat of paint?

At NJS Sash Windows, we've spent nearly two decades saving period property buyers from costly surprises. Since 2005, we've been the trusted name for sash window renovation, restoration and repair across Stamford, Peterborough, Cambridge and London. And now, we're bringing that expertise to pre-purchase sash window surveys—so you can buy with confidence, not crossed fingers.

Why a Sash Window Survey Should Be Top of Your List

A standard homebuyer survey might note "some evidence of timber decay" and move on. But that vague observation could hide thousands of pounds in repairs.

A specialist pre-purchase sash window condition report from NJS tells you exactly what you're dealing with:

Timber condition – rot, woodworm, and decay in frames, sashes, and cills
Operation – do the sashes open and close smoothly, or are they painted shut?
Cords and weights – intact or snapped? Are the correct weights present?
Draught-proofing – are the windows letting in cold air and driving up energy bills?
Glazing – single, double, or failed units? Cracked or misted glass?
Heritage compliance – for listed buildings or conservation areas, are the windows appropriate?
Structural impact – has water ingress damaged surrounding brickwork or plaster?
We work on wooden sash windows, period property windows, and listed building sash windows—including Grade II and Grade II* listed buildings. We know what to look for because we've been restoring these windows for two decades.

What Your Pre-Purchase Sash Window Survey Covers

Timber Frames, Sashes & Cills

We uncover hidden rot, decay and structural defects that could cost thousands to repair.

Sash Cords, Pulleys & Weights

We check every moving part to ensure your sash windows operate correctly and safely.

Draught-Proofing & Weather Seals

Poor seals lead to draughts, heat loss and higher energy bills. We'll identify where improvements are needed.

Glazing

We inspect for cracked glass, failed double glazing, damaged putty and glazing defects.

Window Operation

Sticking, rattling or difficult-to-open sash windows can indicate underlying movement or wear.

Paint & Timber Condition

Fresh paint can disguise rotten timber. We know exactly where to look.

Heritage & Conservation Issues

We'll identify inappropriate repairs or replacement windows that could cause problems in listed buildings or conservation areas.

Repair or Replace?

You'll receive an honest assessment of what can be restored, what needs replacing, and an estimate of likely repair costs—giving you confidence to negotiate before you buy.

Who Needs This Service?

Homebuyers – buying a period property and want to know the true condition of the windows before you exchange contracts.

Sellers – want to demonstrate transparency and avoid last-minute negotiations falling through.

Estate agents – looking to provide added value to clients buying period homes.

Solicitors & conveyancers – advising clients who need specialist reports for listed building purchases.

How Much Does a Pre-Purchase Sash Window Survey Cost?

While costs vary depending on the size and complexity of the property, a specialist sash window condition report typically starts from around £400. For a full Level 3 Building Survey with detailed sash window assessment, expect £600–£1,500+.

Compare that to the cost of replacing a full set of timber sash windows—£5,000–£10,000 for softwood or £10,000–£22,000 for hardwood for a typical Victorian terrace. A £500 survey that uncovers £8,000 of hidden rot is the cheapest insurance you'll ever buy.

Why Choose NJS Sash Windows?

Established 2005 – nearly two decades of specialist experience

Heritage experts – we work on period and listed properties, including Grade II and Grade II* buildings

Full-service capability – from survey to restoration to full renovation, we do it all

Traditional craftsmanship – we preserve the character of traditional windows while improving performance

Local knowledge – we understand the specific challenges of period properties in Stamford, Peterborough, Cambridge, London and surrounding areas

Serving Stamford, Peterborough, Cambridge, London & Beyond

We operate across Stamford, Peterborough, Cambridge, London, Spalding, Deeping, Rutland, and Cambridgeshire. Whether you're buying a Georgian townhouse in Stamford town centre, a Victorian terrace in Peterborough, or a listed building in Cambridge, we know your local property stock inside out.

Book Your Pre-Purchase Survey Today

Don't let charm blind you to cost. A specialist sash window survey from NJS gives you the knowledge you need to buy with confidence and negotiate with power.

📞 Call us: 07949 876833

📧 Email or visit:

Address

Church Farm, Etton
Stamford
PE67DA

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