Buckinghamshire · England
Sand Mastic in Hedsor
Sand mastic across Hedsor and nearby, with every bit of old sealant taken out first and a one-year guarantee.
- Open joints round the window box
- Silicone on a period window that looks wrong
- Cement or filler used on old window joints that has cracked
How we handle sand mastic in Hedsor
Silicone on a period window often looks wrong and doesn’t suit the building. Sand mastic gives a finish that matches the age of the house, and we can replace one with the other. Typical jobs include mastic round period door frames that has failed and open joints round the window box, on stone surrounds, brick reveals and period & listed homes.
Somewhere as small as Hedsor, older homes often have timber frames set in stone or brickwork. Older buildings like these don’t always suit modern silicone, and sometimes a traditional sand mastic is the better choice.
The work is guaranteed for twelve months. If something isn’t right with it in that time, tell us and we will put it right.
- Location
- Hedsor (HP10, SL8)
- Wider area
- Buckinghamshire
- Guarantee
- A year, on every job
- Quote
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
Hedsor questions
Can you do sand mastic in Hedsor?
Yes, Hedsor is within the area we cover. We work across London and the South East. You can call 0345 464 0079 or email us and let us know what needs doing, and we will give you a clear price.
Will you come out to Hedsor?
Yes, we do. We work across London and the South East, and smaller places are part of that. The journey is planned ahead, so it helps to know about access.
I’m a tenant. Can you help?
Of course. Check with your landlord; we can send the quote to them too.
Do I need to be at home?
That depends on where the joints are. Inside work needs someone to give us access, and for outside work we will agree access with you when we book.
Will it make a mess?
Not at all. The area is protected while we work and cleaned up afterwards.
Can I do it myself?
You can, for simple jobs. Preparation is everything: all the old sealant out, and a clean, dry joint. If it does not work out, we can redo it.
Can I paint the new mastic?
It’s traditionally left unpainted, as guidance on traditional windows advises. Ask us before decorating.
Do you work for letting agents?
Yes, we do. We work in homes, commercial premises and hotels.
Places near Hedsor
Other services in Hedsor
How to look after the new joints
Good habits help new joints last longer. A few tips:
- Keep modern sealant off the mastic
- Make sure water runs off the sill
- Get any rot dealt with first
- Plan mastic work ahead of painting
Do not run silicone over the new mastic. If you see a crack, ask us to take a look before trying a quick fix.
It’s best to renew mastic before painting the windows. Paint over cracked mastic only covers it up.
The process
You don’t need to clear the whole room or building, just the space around the work. Everything nearby is protected, and the work takes a few hours per window, depending on the condition of the joints for a typical job. Somewhere as small as Hedsor, access is often the only tricky part. For outside work, also let us know about exposed walls and any outbuildings involved.
- First we agree which joints need doing.
- We remove the old, loose mastic.
- We pack any deep voids first.
- The sand mastic is mixed and pressed into the joint by hand.
- We dress the finish so it sits neatly against the masonry.
Preparing for the visit
- Mention any leaks or damp you’ve noticed
- Clear the area around the work
- Mention if the joints have been sealed before
Ask for a quote
Call for a quick quote, or email us if that’s easier. Tell us about the joints that need doing and we’ll talk you through the work before giving you a price.
Related advice
Windows and doors in Hedsor
London and the South East are among the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast. With historic houses such as Cliveden (about 1.1 miles south) nearby, there’s older building stock in the area around Hedsor as well as newer homes. Where a home is older, older timber frames in brick or stone need a different approach from a modern uPVC window.
For an older house near a landmark such as Cores End United Reformed Church, frames set in older brick or stone need a sealant that suits the wall as well as the frame. Schools such as St Paul's Church of England Combined School are buildings too, and the mastic around its windows and doors needs looking after like any other building’s.
Hedsor is about 3 miles south-west of Beaconsfield, in Buckinghamshire. From the centre of Hedsor to the outskirts, we cover sand mastic for every kind of property, from flats and houses to offices and hotels. 263 places in Buckinghamshire are on our list. Our Reading page covers work nearby, about 15 miles away.
Every address in HP10 and SL8 is covered for sand mastic, from the main roads to the quietest streets. Whether your property is on Kiln Fields, Kiln Lane and Broad Lane or a nearby road, our applicators can take on the job. We also cover the places around Hedsor: Wooburn (1 mile north), Berghers Hill (1 mile north-east), Wooburn Common (1 mile north-east), Wooburn Green (2 miles north) and Littleworth Corner (2 miles south-east). Larger places within reach include High Wycombe (5 miles north-west), Chesham (10 miles north), Marlow (4 miles west), Amersham (8 miles north-east), Beaconsfield (3 miles north-east) and Chalfont St Peter (6 miles east).
Near you in Hedsor
We work in homes and buildings around Chequers Inn and Wye Valley School, among other places. The closest station to Hedsor is Bourne End station, about 1 mile west of the centre. A little further out are High Wycombe Castle (4.7 miles north-west) and Marlow Community Hospital (3.6 miles west). Green spaces nearby include Warren Nature Reserve and Taplow Lake.
Leave it or put it right?
Cement-based fillers and modern sealants do not always suit a period surround. Sand mastic matches what was there, which can matter on listed and conservation-area homes. Where a wall is exposed, as many are in small places like Hedsor, wind-driven rain gets into any failed joint, and older walls, once damp, take a long time to dry.
Every job is a little different, so we quote each one individually. Size, access and the product the joint needs all make a difference.
Why us?
- We’re fully insured
- Neat joints and a tidy finish
- More than 20 years in sealant work
- Anti-fungal silicone where joints get wet
Quotes for sand mastic in Hedsor
Your quote is based on your job. We look at:
- Mould in or behind the old joints
- Any working-time requirements on site
- The number of rooms or windows
- The number and length of the joints
We do not show prices on the website, because each job is priced on what it involves. Call for a quick quote.
Asking for a quote
To help us quote quickly, let us know:
- What the problem is, such as mould, gaps, leaks or cracking
- The address or postcode of the job
- Any previous sealing or DIY work
- A few photos by email, if you can
Getting a quote is simple: tell us what needs doing and where and its rough size. A few photos by email make the job easier to understand, and we’ll come back to you with a quote.
DIY versus a professional finish
The biggest DIY mistake is sealing over old sealant. Silicone does not stick to old silicone, so it peels away and traps moisture behind it. All the old material has to come out first.
A careful DIYer can reseal a simple joint, 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.
Work for landlords, hotels and businesses
We regularly work with letting and managing agents. Send the address, what’s needed and the access arrangements and we will give you a quote.
In hotels, rooms out of use cost money, so the work can be planned room by room. Hotel work is part of what we do, alongside homes and businesses.
Signs you need sand mastic in Hedsor
Decorating can disturb tired mastic. Many people find it crumbling when they prepare the windows, which is a good time to renew it.
If you can see any of these, it’s time to have the joints looked at:
- Mastic worn away on windows facing the weather
- Draughty sash windows at the surround
- Silicone on a period window that looks wrong
- Crumbling sand mastic round a window
Rented homes near Bourne End station change hands often, and cracked sand mastic around sash windows lets in the draughts tenants complain about.
What your quote should include
- Is VAT in the price?
- The length of the guarantee
- What product goes in the joint
- What the cure time is