Buckinghamshire · England
Window & door mastic in Medmenham, Buckinghamshire
Professional window mastic in and around Medmenham, with every bit of old sealant taken out first and a 12-month guarantee.
- A bead that doesn’t match the frame
- Leaking joints at the ends of sills
- Untidy mastic left by window fitters
Work for landlords, hotels and businesses
Water getting past a failed joint can damage the building, which is a bigger problem in a rented property. Keeping joints in good order is simple maintenance.
Letting agents often deal with us directly. Send the address, what’s needed and the access arrangements and we’ll give you a quote.
About our window mastic in Medmenham
Mr Mastic’s applicators have more than 20 years’ experience with window and door sealants. We’re ARBOMaster approved and fully insured, and every job is covered by a 12-month guarantee. We are often asked to deal with gaps left after new windows were fitted and rain getting in at the frame or under the sill, on window sills, composite doors and timber windows & doors.
Homes in small places like Medmenham often stand in the open, with little to shelter their windows from wind and rain. That exposure dries out and cracks the mastic around frames and sills faster.
Your job is guaranteed for a year, as with all our work.
- Place
- Medmenham (SL7)
- Wider area
- Buckinghamshire
- Cover
- 12 months on all our work
- Quote
- A clear quote up front
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
Windows and doors in Medmenham
Compared with the north and west, the South East gets less rain, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind. Historic houses like Harleyford Manor (about 1.3 miles east) are a reminder that the area around Medmenham has older buildings as well as new. In older buildings, older frames set in brick or stone need a sealant that suits them, and sometimes that’s traditional sand mastic.
If you let a flat or house near Henley-On-Thames station, renewing tired window mastic between tenants heads off draught and damp complaints. For an older house near a landmark such as Church of St Peter and St Paul, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall.
Medmenham is about 3 miles south-west of Marlow, in Buckinghamshire. Medmenham gets the same service as everywhere we cover: the old material taken out, joints prepared properly and a 12-month guarantee. Medmenham is one of 263 towns and villages in Buckinghamshire we cover. There’s also a page for Reading, roughly 9 miles from Medmenham.
Every address in SL7 is within our area for window mastic, from the main roads to the quietest streets. If you need window mastic at a property on Bockmer Lane and Ferry Lane or anywhere close by, our applicators can take on the job. Other places close to Medmenham include Bockmer End (1 mile north-east), Frogmill (1 mile south-east), Danesfield (1 mile east), Mill End (1 mile west) and Aston (1 mile west). Within a short drive, we also cover High Wycombe (6 miles north-east), Chesham (15 miles north-east), Marlow (3 miles north-east), Amersham (13 miles north-east), Beaconsfield (9 miles north-east) and Chalfont St Peter (13 miles east).
What’s near Medmenham
Locally, jobs take us to homes and businesses close to The Dog and Badger pub. For rail, the closest station is Henley-On-Thames station, roughly 2.9 miles south-west. Other landmarks nearby include Marlow Community Hospital (3.3 miles north-east) and Marlow Museum (2.9 miles east). Not far away are Hurley Chalk Pit and Weycock Hill.
When it is not the sealant
A few problems are outside what sealant work can do:
- Damp problems in the wall away from the window
- A frame that has rotted at the joint
- Worn gaskets, brush seals or a door that has dropped
Not sure which it is? You can phone 0345 464 0079 or send us an email and we will tell you honestly before you book.
Joints and surfaces we work on
- Patio & French doors
- Window sills
- Composite doors
- Aluminium frames
- uPVC windows
- Timber windows & doors
What the job involves on each surface
Timber windows & doors
Soft or rotten wood cannot be sealed successfully. If we find rot, we’ll tell you before going ahead, as a joiner will need to deal with it.
Aluminium frames
Metal frames expand in the sun and are often slim, with little room for error. A tidy bead in anthracite grey, black or a matching colour keeps the clean look.
How it works
There is not much for you to do on the day. Show us the job and we’ll take it from there. The job generally takes most of a day for a typical house, less for a few frames from start to finish. Somewhere like Medmenham needs a little journey planning: tell us about narrow lanes, gates, long drives and where we can park. Everything for the job comes with us, so a second trip is avoided where possible.
- We check each frame and agree which ones need doing.
- We remove the old mastic and clean the frame and the wall.
- Deep gaps are filled with backing rod to set the depth.
- A flexible, weatherproof sealant is applied in a colour to suit the frame.
- We clear up and check every joint is fully closed.
How to prepare
- On commercial sites, let us know about site rules
- Let us know about parking restrictions
- Clear items away from the joints we are working on
Getting a quote
For 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 any work starts.
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Common questions in Medmenham
Can you do window mastic in Medmenham?
Yes. We work across London and the South East, and Medmenham is part of that. Just call 0345 464 0079 or email us with a few details of the job.
Do you work for landlords with property near Henley-On-Thames station?
Yes. We work for landlords and agents as well as homeowners, and several properties can be quoted together. You can call 0345 464 0079 or email us with the details for a clear quote.
Can you do several jobs on one visit?
Yes. Tell us about everything you’d like done.
How long will my window job take?
A few frames take a few hours. You’ll get a timescale with the quote.
Can you get sealant to suit coloured frames?
Yes. We can use white, brown, anthracite grey, black or clear, so the joint suits the frame.
Can I paint over the new sealant?
Not if it’s silicone. We choose the product with your decorating in mind, so mention it when you book.
Do you hold any approvals?
Yes. We hold ARBOMaster approved applicator status and we are fully insured too.
Are you fully insured?
Yes. Mr Mastic is fully insured.
Common problems we fix in Medmenham
Plenty of failed mastic was poorly applied in the first place. Sealant run over dust, wet brick or loose mortar never bonded as it should, so it comes away long before its time.
Keep an eye out for any of the following:
- Old mastic that has gone black or come away
- Gaps where the sill meets the wall
- White mastic on grey or black frames
- Hard, cracked sealant around windows
Managing a site like Danesfield School? Then its window and door frames need their mastic kept sound, just like a home’s.
What your quote should include
- What the quote includes, VAT included or not
- Whether all the old sealant comes out first
- Which colour the sealant will be
- What happens if they find a problem under the old sealant
Also near Medmenham
What else we do in Medmenham
Leave it or put it right?
A quick bead over the top of old mastic looks like an easy fix, but it will not grip old, dirty sealant. It peels before long, and water still gets in behind. The old mastic has to come out. Where a wall is exposed, as many are in small places like Medmenham, wind-driven rain gets into any failed joint, and older walls, once damp, take a long time to dry.
Combining jobs into one visit generally makes better use of the time than several visits, so tell us about everything that needs sealing. We’ll send you a clear quote for the lot.
Why book with us
- We leave the area clean and tidy
- You choose the colour before work begins
- Anti-fungal sanitary silicone in wet areas
- White, clear, grey or another colour, product permitting
What affects the cost of window mastic
The quote reflects the job in front of us. We take into account:
- The number of rooms or windows
- Whether the work is at height
- When we can work, for business premises
- The amount of work
The cost reflects the work involved, not a rough estimate. That’s why we ask about the job first and agree the price before starting.
What we need to know
To help us quote quickly, please include:
- The type of property
- How many joints, rooms or windows are involved
- How we’d reach the joints
- The problem you’ve noticed
We don’t publish a price list, because every job is different. Instead, we send you a clear quote for your job. To arrange one, ring 0345 464 0079 or send us an email.