Buckinghamshire · England
Sand mastic for sash & case windows in Sedrup, Buckinghamshire
Window and door surrounds in Sedrup need attention? We remove the old material, prepare the joints and seal them properly, and the work is guaranteed for a year.
- Cement or filler used on old window joints that has cracked
- Draughty sash windows at the surround
- Open joints round the window box
Sand mastic in Sedrup, done properly
On many period windows, sand mastic looks right and suits the building. Newer frames generally get a flexible sealant instead, and we will talk through which suits your home. We work on timber door frames, sash and case windows and period & listed homes, and the jobs we see most are mastic that needs renewing before redecorating and modern sealant on a period surround.
In a village or hamlet like Sedrup, older cottages and farmhouses often have timber windows set in stone or brick. Older buildings like these do not always suit modern silicone, and sometimes a traditional sand mastic is the better choice.
Your job is guaranteed for a year, as with all our work.
- Place
- Sedrup (HP17)
- Region
- Buckinghamshire
- Cover
- A year, on every job
- Price
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
Leave it or put it right?
Gaps round a sash window let in rain and draughts. Water can get to the frame and the masonry so renewing it early protects the window. Where a wall is exposed, as many are in small places like Sedrup, wind-driven rain gets into any failed joint, and damp in older walls is slow to dry out.
Commercial jobs are quoted on the same basis as homes: the amount of work, the access and the products needed. Call for a quick quote and we will explain what it covers.
What you get with us
- 20+ years of sealant experience
- Every job guaranteed for a year
- Full insurance on every job
- Domestic, commercial and hotel work
Towns and villages near Sedrup
What else we do in Sedrup
Sand mastic in Sedrup: local notes
The South East is one of the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
For landlords with property near Aylesbury station, cracked sand mastic around sash windows lets in the draughts tenants complain about. Schools such as Stone Church of England Combined School are buildings too, and its window and door frames need their mastic kept sound, just like a home’s.
Sedrup is about 2 miles south-west of Aylesbury, in Buckinghamshire. Homes, rented property, offices and hotels in Sedrup can book us for sand mastic, old or new, large or small. Every job comes with our 12-month guarantee. We cover 263 towns and villages across Buckinghamshire, from the larger towns to small villages. Oxford is on our list too, about 17 miles from Sedrup.
We work across the HP17 postcode area for sand mastic. Close by, we work in Bishopstone (1 mile south), Walton Court (1 mile east), Upton (2 miles west), Ford (2 miles south-west) and Dinton (2 miles west). Larger places within reach include High Wycombe (12 miles south), Chesham (11 miles south-east), Buckingham (15 miles north-west), Amersham (13 miles south-east), Beaconsfield (15 miles south-east) and Elmhurst (3 miles north-east).
Around Sedrup
Typical jobs here are in homes near The Harrow pub, The Mandeville School and Pebble Brook School, among other places. The nearest railway station is Aylesbury station, about 1.7 miles north-east. Nearby you will also find Dinton Castle (2.1 miles west) and Friars Square (1.8 miles north-east). Green spaces nearby include Beacon Hill and Snakemoor.
The process
Before we leave, we go over the finished joints with you and explain the cure time. The visit itself usually takes a few hours for a single window, longer for several, depending on the size of the job. In a small place like Sedrup, access is normally the main thing to plan. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- We check the window surrounds and agree which joints need renewing.
- Old, loose mastic is raked out and the joint cleaned.
- Deep voids are packed so the mastic is the right thickness.
- Sand mastic is mixed and applied by hand, then shaped to the joint.
- The finish is dressed so it sits neatly against the stone or brick.
Before we arrive
- Where the joints are inside, avoid wetting them before we arrive
- Mention if the joints have been sealed before
- Move anything stored near the joints
Get a quote
For sand mastic in Sedrup, phone 0345 464 0079 or drop us an email. Tell us what the problem is and where, and you’ll get a clear quote before work begins.
Advice
What sealant work cannot fix
We’ll always be straight with you, so here’s what sealant can’t fix:
- Sash cords, weights and draught-proofing of the sashes
- Damaged stone surrounds
- Decayed frames that need repair
If in doubt, ring 0345 464 0079 or send us an email and we’ll say what we think.
Where we work in Sedrup
- Sash and case windows
- Tenement windows
- Period & listed homes
- Stone surrounds
- Brick reveals
- Timber door frames
DIY sealant or a professional job?
What a professional job adds is preparation and the right product. Joints are cleaned back to sound surfaces and dried, and the sealant is matched to the joint and its conditions, and the work is guaranteed for a year.
Some sealant jobs are within reach of a careful DIYer, like a short, easy-to-reach joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
Keeping the joints in good condition
Simple care keeps the joints in good condition. We recommend:
- Have rotten timber repaired before new mastic goes in
- Inspect the joints round the windows every year or so
- Sort the mastic before the decorators arrive
- Ask the planning authority about consent for listed or conservation-area homes
Keep gutters and sills clear so water runs away from the surround. Constant wetting wears the mastic faster.
An open joint round the box lets weather through. The longer it’s left, the more the joint opens.
Your questions about sand mastic in Sedrup
Can you help a landlord with a rental near Aylesbury station?
Yes, landlords and agents are among the people we work for. Just call 0345 464 0079 or send us an email with the address and what needs doing, and we will give you a clear quote.
Do you cover Sedrup for sand mastic?
Yes, Sedrup is within the area we cover. Our work covers London and the South East. Just call 0345 464 0079 or send us an email with a few details of the job, and we will give you a clear quote.
What’s sand mastic made of?
It’s the traditional filler for the joint round timber windows and doors. It’s made with sand and a linseed-oil-based binder.
Can you match the sealant colour?
We help you choose a colour that suits, from white and clear to greys and other shades. The product needed can limit the range.
Can I paint the new mastic?
The usual advice is to leave sand mastic unpainted. If you are redecorating the window, ask us first and we will talk you through it.
Is it worth trying it myself?
Sometimes. The key is preparation: remove all the old material and work on a clean, dry joint. We can always put it right if it fails.
Do you have insurance?
Yes. Full insurance covers our work, and we can confirm the details when we quote.
What does sand mastic cost?
Every job is different, so each one gets its own quote. To get one, phone 0345 464 0079 or send us an email with a short description of the job.
What we’re called out for in Sedrup
Water gets into small cracks in the mastic and pushes it out. Windows facing the weather tend to go first.
The most common problems we see are:
- Window mastic to renew ahead of painting
- Patchy fillers round a sash window
- Gaps round a timber door in stone or brick
- Silicone on a period window that looks wrong
In the older streets around St Mary's Church, the joint between an old wall and a newer frame is generally the first place rain gets in.
Comparing quotes
- Which sealant they’ll use, and why
- How hidden problems are handled
- What the quote includes, VAT included or not
- How long to leave it before use
Landlord and commercial work in Sedrup
Letting agents often deal with us directly. Send the address, what’s needed and the access arrangements.
Businesses can book us for washrooms, kitchens, offices and more. On commercial sites, working times can be discussed when we quote.