Buckinghamshire · England
Chartridge Window Mastic
Window mastic for Chartridge, by sealant specialists with 20+ years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Draughts coming in around windows and doors
- Gaps between the frame and the inside reveal
- Gaps where the sill meets the wall
Window mastic in Chartridge
The mastic around a window or door seals the gap between the frame and the wall. Once that seal fails, wind and rain find the gap. Our applicators cut it out and replace it with a flexible, weatherproof sealant. Typical jobs include white mastic on grey or black frames and damp patches on the reveal after heavy rain, on patio & French doors, composite doors and uPVC windows.
In a village or hamlet like Chartridge, older cottages and farmhouses often have timber windows set in stone or brick. Older buildings like these don’t always suit modern silicone, so the sealant has to be chosen to suit the building.
You’re covered for a year from the day we finish. If there’s a problem with it, please ring 0345 464 0079 or drop us an email.
- Where
- Chartridge (HP5)
- Region
- Buckinghamshire
- Guarantee
- 12 months on all our work
- Quote
- A clear quote up front
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
What we do, step by step
Every visit runs the same way: we look at the joints together, mask and protect the surrounding surfaces, do the work and tidy away. It generally takes a morning for a couple of windows and a door. Somewhere as small as Chartridge, access is often the only tricky part. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- First we look at every frame and agree the list.
- We remove the old mastic and clean the frame and the wall.
- Where gaps are deep, backing rod goes in first.
- New exterior sealant goes on in a matching colour and is tooled smooth.
- Finally we tidy up and check each joint.
Before we arrive
- Keep children and pets away from the work area
- On commercial sites, let us know about site rules
- Move anything stored near the joints
How to get a quote
Call for a quick quote, or email us if that’s easier. Describe what needs sealing and we will explain what’s involved and give you a clear quote.
Read more
Surface by surface
Patio & French doors
Patio and French doors have the longest joints on most houses. The threshold and the bottom corners take the most water, so they get particular care.
Timber windows & doors
On period timber windows, traditional sand mastic is sometimes the better choice. We will tell you which suits your home.
Keeping the joints in good condition
Joint life depends on how it’s used and looked after. Here’s what we suggest:
- Wash the frames with mild soapy water
- Keep paint off silicone joints
- Don’t use solvent cleaners on the joint
- Do not aim a pressure washer at the joints
Keep the new mastic undisturbed while it cures, following the cure time we give you. Don’t point a pressure washer at the joints.
Water trapped behind a failed joint can start rot in timber frames and sills. Rotten timber needs a joiner, not a sealant, so it pays to reseal before that happens.
Quotes for window mastic in Chartridge
You will get a clear quote before we start. It takes into account:
- The size of the job
- The old material and how stubborn it is
- The type of sealant required
- How many areas need sealing
Rather than a set price list, we price the job in front of us: the amount of work, the old material and the access. The price is agreed before we begin.
Asking for a quote
What to tell us when you ask for a quote:
- If someone has resealed it before
- Access, such as stairs, a lift or height
- Photos by email, if that’s easy
- Where the job is, and your postcode
To get a quote, ring 0345 464 0079 or email us and tell us where the job is and what the problem looks like. You’ll have a clear quote before we start.
Your questions about window mastic in Chartridge
Is Chartridge in your area for window mastic?
Yes, Chartridge is within the area we cover. We work across London and the South East. Just phone 0345 464 0079 or drop us an email with a few details of the job, and we’ll send you a clear quote.
Will you come out to 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 hold any approvals?
Yes. We hold ARBOMaster approved applicator status, and we’re fully insured.
Will resealing my frames help with draughts?
If the draught is coming in around the frame, yes. If it’s through the window’s own seals or a hinge, that is a different fix, and we’ll say so.
Do you take out the old sealant first?
Always. Sealing over the old bead is the commonest cause of early failure, and it’s something we never do.
Can I paint over the new sealant?
Not if it’s silicone. Tell us your decorating plans and we will pick a sealant to suit.
Do you seal inside as well as outside?
Yes. The outside joint keeps the weather out, and the inside joint stops draughts and finishes the reveal. We do one or both.
Are you insured?
Yes, we are fully insured for domestic and commercial work.
Also near Chartridge
What else we do in Chartridge
Work for landlords, hotels and businesses
Businesses can book us for washrooms, kitchens, offices and more. For commercial premises, we can talk through working times when we quote.
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.
When something else is needed
We will always be straight with you, so here’s what sealant cannot fix:
- Soft or decayed wood in the frame
- Broken hinges, locks or handles
- Damp coming through the wall itself rather than the frame joint
If in doubt, ring 0345 464 0079 or drop us an email and we will say what we think before you book.
Joints and surfaces we work on
- Composite doors
- Aluminium frames
- uPVC windows
- Window sills
- Patio & French doors
- Timber windows & doors
What window mastic looks like in Chartridge
Historic houses like Cholesbury Manor House (about 2.1 miles north) are a reminder that the area around Chartridge 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. 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.
If you let a flat or house near Great Missenden station, sound mastic around windows and doors keeps out the draughts and damp that tenants notice first. In the older streets around St John's Church, frames set in older brick or stone need a sealant that suits the wall as well as the frame.
Chartridge is about 2 miles north-west of Chesham, in Buckinghamshire. Homes, rented property, offices and hotels in Chartridge is covered for window mastic. The work is guaranteed for a year. Chartridge is one of 263 towns and villages in Buckinghamshire where we work. We also work in Reading, around 24 miles away.
Our applicators cover all of the HP5 postcode area for window mastic. Whether your property is on Chartridge Grange Drive and Cogdells Lane or a nearby road, our applicators can take on the job. We also cover 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).
Around Chartridge
Locally, jobs take us to homes and businesses close to Chiltern Hills Academy and The Bell pub. The nearest railway station is Great Missenden station, about 3.1 miles south-west. Well-known places in the area include Roald Dahl Museum and Story Centre (3 miles south-west) and Hawridge Court (1.5 miles north-east). For a walk, there’s Pavis Wood and Sands Bank.
Common problems we fix in Chartridge
On timber frames, paint and putty build up around the joint. Mastic painted over many times cracks with the paint, and timber moves with moisture as well as temperature.
Any of these means the joints need attention:
- Untidy mastic left by window fitters
- Rain getting in at the frame or under the sill
- A bead that does not match the frame
- Gaps where the sill meets the wall
For site and facilities teams at buildings such as Chartridge Combined School, larger buildings have plenty of frames, and the mastic around each one ages.
What to look for in a quote
- Whether they’re fully insured
- What guarantee comes with the work
- Is the old sealant removed completely?
- What the quote includes, VAT included or not