Buckinghamshire · England
Sand Mastic in Chartridge
Sand mastic across Chartridge and nearby, with every bit of old sealant taken out first and a 12-month guarantee.
- Weathered mastic on the most exposed windows
- Mastic dropping out of the joint
- Cement or filler used on old window joints that has cracked
Sand mastic in Chartridge
Sand mastic skins over fairly quickly but full hardening takes longer. Traditionally, sand mastic is left unpainted, so ask us before you decorate. If you are dealing with mastic worn away on windows facing the weather and tired mastic found when preparing windows for paint, we can help.
Mastic can only go onto a dry, clean joint, so window work in Chartridge is booked around the forecast. Let us know about access to all the frames, upstairs ones included.
Whatever the size of the job, it’s backed by our one-year guarantee in Chartridge and across Buckinghamshire.
- Place
- Chartridge (HP5)
- Region
- Buckinghamshire
- Guarantee
- 12 months on all our work
- Price
- A clear price before we start
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
Landlords, agents and businesses in Chartridge
Water getting past a failed joint can damage the building, which is a bigger problem in a rented property. Resealing at the right time is simple maintenance.
We regularly work with letting and managing agents. Tell us the address, the job and how access works.
Leave it or put it right?
New sash windows are a major, costly change, and in listed buildings it may need consent. Where the frames are in good order, new mastic seals the surround. Where a wall is exposed, as many are in small places like Chartridge, wind-driven rain gets into any failed joint, and older walls, once damp, take a long time to dry.
What it costs depends on how much there is to do, how much old material has to come out and how easy the joints are to reach. We give a clear quote before any work starts.
Why Chartridge customers choose us
- 4.9 on Google from 180+ five-star reviews
- Every job guaranteed for a year
- Anti-fungal sanitary silicone in wet areas
- Tidy, careful work
Read what affects the cost or what customers say.
The process
Our applicators work methodically: protect, prepare, seal, tidy. Typically it takes a few hours for a single window, longer for several, and the area is left clean. In a small place like Chartridge, access is usually the main thing to plan. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- First, we look at the surrounds with you and agree what needs doing.
- We rake out the old mastic and clean the joint.
- Large voids are packed out first, so the mastic is not too thick.
- Sand mastic is mixed and applied by hand, then shaped to the joint.
- The mastic is finished to sit tidily against the stone or brick.
Preparing for the visit
- Mention any sign-in or site rules at work premises
- Tell us about any previous sealing or DIY attempts
- Move anything stored near the joints
Get a quote
To get a quote, call 0345 464 0079 or email us with the location and a short description of the problem. We will give you a clear price before any work starts.
Read more
Aftercare tips
Simple care keeps the joints in good condition. Our advice:
- Take care around the mastic when scraping paint
- Don’t paint over the new mastic
- Keep sills and gutters clear so water drains away
- Avoid patching sand mastic with silicone
Make sure water drains away from the window surround. Water sitting against the mastic shortens its life.
Good mastic helps keep the frame dry. Failed mastic lets water reach the timber, which can lead to rot.
Chartridge: your questions answered
Do you cover Chartridge for sand mastic?
Yes. We work across London and the South East, and Chartridge is part of that. Just call 0345 464 0079 or email us with a few details of the job, and we’ll send you a clear quote.
Do you cover smaller places like Chartridge?
Yes. Chartridge is within the area we cover, which takes in towns, villages and rural addresses. Our work covers London and the South East. Just mention lanes, gates or anything else about the route when you book.
Do you work for hotels and businesses?
Yes, regularly. We can plan bigger jobs in stages.
Is there any odour?
That depends on the sealant. Some products have a noticeable smell, others very little, and any smell fades as they cure.
Should I check with the council before work on a listed or conservation-area home?
Check with your local planning authority. They decide whether consent is needed.
Can I do it myself?
Some simple jobs can be done by a careful DIYer. The usual mistakes are sealing over old sealant, sealing a damp joint and using too much.
Do you take out the old sealant first?
Yes, always, and completely. New sealant will not bond properly to old, so the joint is cleaned back first.
What information do you need?
Only a few details: the address or postcode, what’s wrong and any access issues. After that, simply ring 0345 464 0079 or drop us an email.
DIY sealant or a professional job?
Too much sealant is as bad as too little. A heavy bead looks messy and copes badly with movement, and the joint depth matters as much as the finish.
Not every job suits DIY: work at height, external movement joints, fire-rated sealant and large areas need the right product, the right access and the right method.
What we can’t put right
In fairness, some problems need a different trade:
- Decayed frames that need repair
- Crumbling stone or brickwork round the window
- Broken panes
Not sure which it is? You can ring 0345 464 0079 or send us an email and we will tell you honestly before booking.
Where we work in Chartridge
- Brick reveals
- Timber door frames
- Stone surrounds
- Tenement windows
- Period & listed homes
- Sash and case windows
Also near Chartridge
Also in Chartridge
How we quote for sand mastic
The price is agreed before any work begins. It’s based on:
- Mould in or behind the old joints
- How many rooms, windows or areas are involved
- Which sealant suits the joint
- Whether the work is at height
Combining jobs into one visit generally makes better use of the time than several visits, so tell us about everything that needs sealing. You will get one clear quote for the whole job.
Asking for a quote
There’s no need for technical detail. It helps if you can tell us:
- What the problem is, such as mould, gaps, leaks or cracking
- A few pictures by email, if you can
- Where the job is, and your postcode
- How many joints, rooms or windows are involved
Quotes start with a quick conversation. Tell us what’s wrong, where it is and how much there is. Whenever you are ready, ring 0345 464 0079 or drop us an email.
Frames and glazing around Chartridge
Rainfall in the South East is lower than in much of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind. With historic houses such as Cholesbury Manor House (about 2.1 miles north) nearby, there’s older building stock in the area around Chartridge 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 landlords with property near Great Missenden station, any sash windows need sound mastic to keep draughts and rain out. For an older house near a landmark such as St John's Church, frames set in older brick or stone need a sealant that suits the wall as well as the frame. For site and facilities teams at buildings such as Chartridge Combined School, its window and door frames need their mastic kept sound, just like a home’s.
Chartridge is about 2 miles north-west of Chesham, in Buckinghamshire. Wherever you are in the HP5 postcode area, we cover sand mastic for homes and businesses. 263 places in Buckinghamshire are on our list, from the larger towns to small villages. Our Reading page covers work nearby, about 24 miles away.
All of HP5 is covered for sand mastic. Whether your property is on Chartridge Grange Drive and Cogdells Lane or a nearby road, our applicators can take on the job. Nearby, we also carry out sand mastic in Asheridge (1 mile north-east), Bellingdon (1 mile north), Hundridge (1 mile south), Ballinger Common (1 mile west) and Pond Park (1 mile east). Within a short drive, we also cover Aylesbury (10 miles north-west), High Wycombe (8 miles south-west), Marlow (12 miles south-west), Amersham (4 miles south-east), Beaconsfield (8 miles south) and Chalfont St Peter (9 miles south-east).
Local landmarks in Chartridge
We work in homes and buildings around Chiltern Hills Academy and The Bell pub and the streets around them. The closest station to Chartridge is Great Missenden station, about 3.1 miles south-west of the centre. Nearby you’ll also find Roald Dahl Museum and Story Centre (3 miles south-west) and Hawridge Court (1.5 miles north-east). Green spaces nearby include Pavis Wood and Sands Bank.