Buckinghamshire · England
Mop End Sand Mastic
Problem with your window and door surrounds in Mop End? We cut out the old, prepare the joints and apply the right sealant, and the work is guaranteed for a year.
- Failed mastic on an exposed elevation
- Wind and rain getting in round a sash window
- Old cement repairs round a window that have failed
How we quote for sand mastic
We don’t publish a price list, because jobs vary so much. The quote depends on:
- The amount of work
- How much old sealant there is and how hard it is to remove
- Any mould that needs treating
- How easy the joints are to reach
A failed joint rarely gets cheaper to fix by waiting, because water and mould keep working on it. If you’re unsure, call 0345 464 0079 or email us and we’ll give you an honest view and a quote.
Helping us quote
Photos by email are helpful but not essential. Please mention:
- Where the job is, and your postcode
- If it’s domestic, commercial or a hotel
- Pictures of the joints, sent by email
- How many joints, rooms or windows are involved
It all starts with a short chat. Describe the problem, the location and the size of the job, and we’ll explain how we’d tackle it. When it suits you, ring 0345 464 0079 or email us.
About our sand mastic in Mop End
We renew sand mastic around sash windows and doors set in stone or brick. Out comes the old, loose mastic, and new mastic is applied and shaped by hand. Common call-outs are for cement or filler used on old window joints that has cracked and window mastic to renew ahead of painting, on sash and case windows, stone surrounds and period & listed homes.
Around Mop End, many homes face open ground, so their windows and doors take the full weather. That exposure dries out and cracks the mastic around frames and sills faster.
Whatever the size of the job, you get the same 12-month guarantee in Mop End and across Buckinghamshire.
- Location
- Mop End (HP7)
- Region
- Buckinghamshire
- Cover
- A year, on every job
- Quotes
- Quoted before any work starts
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
When to call us in Mop End
Decorating can disturb tired mastic. It’s often found when windows are being prepared for paint, which is a good time to renew it.
The problems people usually mention when they call are:
- Gaps between timber frames and stone or brick
- Tired mastic found when preparing windows for paint
- Failed mastic on an exposed elevation
- Cracked mastic round a front door frame
For an older house near a landmark such as Church of the Holy Trinity, frames set in older brick or stone need a sealant that suits the wall as well as the frame.
Questions to ask before booking
- Whether VAT is included
- Whether the sealant suits the joint
- How the colour is chosen
- How the surfaces are prepared before sealing
What we cannot put right
In fairness, there are a few things sealant will not fix:
- Cracked or broken glass
- Decayed frames that need repair
- Planning or listed building consent (your local planning authority decides)
Not sure which it is? You can phone 0345 464 0079 or send us an email and we’ll tell you honestly.
What we seal
- Tenement windows
- Timber door frames
- Stone surrounds
- Brick reveals
- Period & listed homes
- Sash and case windows
The process
When we get to you, we check the joints match what you told us. If anything is different, we explain it before carrying on. After that, the work takes a few hours per window, depending on the condition of the joints. In a small place like Mop End, access is normally the main thing to plan. For outside work, also let us know about exposed walls and any outbuildings involved.
- First we agree which joints need doing.
- Old mastic and any loose material are raked out.
- We pack any deep voids first.
- We apply the mastic by hand and shape it.
- The surface is finished to suit the stone or brick.
How to prepare
- Let us know if you’ve seen damp or leaks
- Clear items away from the joints we are working on
- On commercial sites, let us know about site rules
Ask for a quote
Every job is quoted individually. Just phone 0345 464 0079 or email us with the details.
Related advice
Frames and glazing around Mop End
Compared with the north and west, the South East gets less rain, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day. Historic houses like Hughenden Manor (about 4.1 miles west) are a reminder that the area around Mop End has older buildings as well as new. Where a home is older, older frames set in brick or stone need a sealant that suits them, and sometimes that’s traditional sand mastic.
Rented homes near Amersham station change hands often, and cracked sand mastic around sash windows lets in the draughts tenants complain about. For site and facilities teams at buildings such as Curzon Church of England Combined School, its window and door frames need their mastic kept sound, just like a home’s.
Mop End is about 3 miles west of Amersham, in Buckinghamshire. Homes, rented property, offices and hotels in Mop End is covered for sand mastic. The work is guaranteed for a year. Our area takes in 263 places across Buckinghamshire. We also work in Reading, about 20 miles from Mop End.
Our applicators cover all of the HP7 postcode area for sand mastic and the streets around it. We also cover the places around Mop End: Penn Street (1 mile south), Beamond End (1 mile west), Woodrow (1 mile south-east), Holmer Green (1 mile west) and Winchmore Hill (1 mile south-east). Within a short drive, we also cover Aylesbury (12 miles north-west), High Wycombe (4 miles south-west), Chesham (4 miles north-east), Marlow (8 miles south-west), Amersham (3 miles east) and Beaconsfield (4 miles south).
Landmarks near Mop End
We work in homes and buildings around The Squirrel pub and Holmer Green Senior School, among other places. The closest station to Mop End is Amersham station, about 2.6 miles east. Other landmarks nearby include Great Missenden (2.3 miles north-west) and Amersham Fair Organ Museum (3.1 miles east). The countryside around Mop End includes Gomm's Wood.
Should I try it myself first?
What a professional job adds is preparation and the right product. Joints are cleaned back to sound surfaces and dried, and the sealant is chosen for how the joint moves and where it is.
If you’ve already had a go yourself, that is fine. We remove it and do the joint properly, so just mention it when you contact us.
Why it’s worth doing now in Mop End
An open joint round the frame lets weather in. 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 Mop End, wind-driven rain gets into any failed joint, and damp in older walls is slow to dry out.
Homes and businesses are quoted the same way: how much there is to do, how we reach it and what it needs. Call for a quick quote and we’ll explain what it covers.
Why us?
- Over 20 years’ experience
- Quality sealants from Arbo and Everbuild
- Every job guaranteed for a year
- Any old sealant cut out fully, not covered over
Looking after it afterwards
No joint lasts for ever, but care makes a real difference. A few tips:
- Renew mastic before redecorating the windows
- Find out about consent before window work on a listed home
- Do not run silicone over sand mastic
- Look over the window mastic once a year
Do not touch or press the mastic while it hardens. It forms a skin fairly soon, but takes longer to harden fully.
Fine cracks show the mastic is starting to fail. Renewing it then is simpler than waiting until it falls out.
Common questions in Mop End
Do you work for landlords with property near Amersham station?
Yes, we work for landlords and agents. Just phone 0345 464 0079 or send us an email and tell us about the property, and we will send you a clear quote.
Do you cover smaller places like Mop End?
Yes, Mop End is covered. Our work covers London and the South East, and smaller places are part of that. Longer journeys are simply planned in advance.
Can you seal over the old sealant?
No, because it fails. The old sealant always comes out first, so the new sealant bonds properly.
Is it messy?
We keep the work tidy. Nearby surfaces are protected, and the area is left clean when we finish.
Is it possible to take out silicone and use sand mastic instead?
In most cases. The silicone is cut out and the joint cleaned before the sand mastic goes in.
What exactly is sand mastic?
Sand plus a binder based on linseed oil. It’s built up in the joint by hand and shaped to suit the surround.
Should I try DIY first?
You can, for simple jobs. 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.
What information do you need?
Tell us what needs doing and where, with photos by email if possible. If we need more, we will ask.