Buckinghamshire · England
Great Missenden Window Mastic
Mastic around window and door frames, sills and patio doors for Great Missenden, backed by a one-year guarantee. Ask us for a quote.
- Gaps left after new windows were fitted
- Cold air getting in at the frame edge
- Rain getting in at the frame or under the sill
About our window mastic in Great Missenden
If you can feel air around a shut window, the gap is often at the frame. A new joint stops the air getting through and quietens the whistle on windy days. If the draught is through the window seals instead, we will tell you. We work on aluminium frames, uPVC windows and patio & French doors, and people most often call us about draughts coming in around windows and doors and water coming in at the bottom corners of a door.
Mastic can only go onto a dry, clean joint, so window work in Great Missenden is booked around the forecast. Let us know about access to all the frames, upstairs ones included.
A one-year guarantee comes as standard, so you are not left on your own once the job is done.
- Location
- Great Missenden (HP16)
- Wider area
- Buckinghamshire
- Guarantee
- 12 months on all our work
- Quote
- A clear quote up front
- Call
- 0345 464 0079
- Updated
- 26 October 2026
Work for landlords, hotels and businesses
From a single let to a portfolio, the work is the same standard: old sealant fully removed, joints prepared properly and a 12-month guarantee.
If you manage several properties in or around Great Missenden, several properties can be quoted together. Send us the addresses and the work at each.
What we do, step by step
When we get to you, we check the joints match what you told us. If we find something unexpected, we talk it through with you first. After that, the work takes a few hours for a handful of frames, longer for a whole house. Somewhere like Great Missenden needs a little journey planning: tell us about narrow lanes, gates, long drives and where we can park. We bring what the job needs, so it can be finished in one trip where possible.
- First, we confirm safe access to each frame.
- Old, cracked mastic is removed completely, along with any loose debris.
- Frame and wall are cleaned and must be dry before sealing, and primed where the sealant calls for it.
- Deep voids are backed, then the sealant is gunned in.
- We tool the joint so water runs off, then clear up.
Preparing for the visit
- For indoor joints, keep the area dry beforehand if you can
- Plan for the work area to be out of bounds to pets and children
- Move anything stored near the joints
How to get a quote
Call for a quick quote, or send an email if you’d rather. Describe what needs sealing and we will talk you through the work before giving you a price.
Advice
What affects the quote in Great Missenden
For a quick quote, just ask. The main things that affect it are:
- How much there is to do
- How easy the joints are to reach
- How much old sealant there is and how hard it is to remove
- Any working-time requirements on site
Instead of a standard rate, 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
The more you tell us, the more accurate the quote. When you ask for a quote, tell us:
- Access, such as stairs, a lift or height
- What the problem is, such as mould, gaps, leaks or cracking
- If it’s domestic, commercial or a hotel
- Pictures of the joints, sent by email
Quotes start with a quick conversation. Describe the problem, the location and the size of the job, and we will talk you through what we’d do. When it suits you, call 0345 464 0079 or send us an email.
What we can’t put right
Some problems need a builder, plumber or other trade rather than us:
- Faulty window hardware
- Penetrating damp from a failed cavity tray or render
- Rotten timber, which needs a joiner first
If in doubt, phone 0345 464 0079 or email us and we’ll say what we think before booking.
Where we work in Great Missenden
- uPVC windows
- Aluminium frames
- Patio & French doors
- Timber windows & doors
- Composite doors
- Window sills
Leave it or put it right?
Choosing the product is half the job. Decorators’ caulk and bathroom silicone are not designed for outside joints that move. A low-modulus exterior sealant keeps its stretch through hot and cold weather. In a small place like Great Missenden, homes can be exposed to wind and rain, which finds any gap, and damp in older walls is slow to dry out.
What it costs depends on the size of the job, how much old material has to come out and how easy the joints are to reach. We give a clear quote before work begins.
What you get with us
- Sanitary silicone with an anti-fungal additive in wet areas
- Tidy, careful work
- Experience in homes, commercial sites and hotels
- Colour agreed with you before work begins
Take a look at what affects the cost and customer reviews.
Towns and villages near Great Missenden
Also in Great Missenden
Great Missenden homes and the weather
Rainfall in the South East is lower than in much 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 Hughenden Manor (about 4.2 miles south-west) nearby, there’s older building stock in the area around Great Missenden as well as newer homes. 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.
Letting a property close to Great Missenden station? Then sound mastic around windows and doors keeps out the draughts and damp that tenants notice first. Managing a site like Great Missenden CofE Combined School? Then the mastic around its windows and doors needs looking after like any other building’s. In the older streets around Church of Saints Peter and Paul, the joint between an old wall and a newer frame is generally the first place rain gets in.
Great Missenden is about 4 miles west of Chesham, in Buckinghamshire. From the centre of Great Missenden to the outskirts, window mastic is available for homes and businesses alike. Our Buckinghamshire coverage runs to 263 places, and Great Missenden is one of them. Our Reading page covers work nearby.
Work in HP16 works the same way as everywhere else we cover. You’ll find streets such as High Street, London Road and Station Approach, all of which we cover. Nearby, we also carry out window mastic in Hunt's Green (2 miles north), Wendover Dean (2 miles north-west), Lee Gate (3 miles north), Great Hampden (3 miles west) and Kingsash (3 miles north). Larger places within reach include Aylesbury (9 miles north-west), High Wycombe (5 miles south), Chesham (4 miles east), Marlow (9 miles south), Amersham (5 miles south-east) and Beaconsfield (7 miles south).
What’s near Great Missenden
Typical jobs here are in homes near The Cross Keys Public House, Misbourne School and Missenden Abbey Adult Education College and the streets around them. Great Missenden has its own railway station: Great Missenden station. Well-known places in the area include Hawridge Court (4.5 miles north-east) and Chiltern Hospital (1.1 miles south-east). Green spaces nearby include Coombe Hill and Prestwood Local Nature Reserve.
FAQs for Great Missenden
Can you do window mastic in Great Missenden?
Yes. Our work covers London and the South East, and Great Missenden is part of that. You can call 0345 464 0079 or drop us an email and tell us what needs doing.
Do you cover smaller places like Great Missenden?
Yes, Great Missenden is covered. Our work covers London and the South East, from towns to the smallest places. The journey is planned ahead, so it helps to know about access.
When is the sealant fully cured?
Different products cure at different speeds, so please follow the time we give you when we finish.
Can landlords and businesses book you?
Yes, we do. Domestic, commercial and hotel work are all part of what we do, and we are fully insured.
Will resealing my frames help with draughts?
Yes, if the air is getting in around the frame. If it’s through the window’s own seals or a hinge, that is a different fix, and we’ll say so.
Are you fully insured?
Yes. Mr Mastic is fully insured, and we have been doing sealant work for more than 20 years.
What do you need from me for a quote?
A short description and the location, with pictures by email if possible. If we need more, we will ask.
Can I add another job to the visit?
Yes. Just list everything you need and we’ll quote it together.
Looking after it afterwards
To keep the joints looking good and working properly:
- Keep timber frames painted
- Look round the frames every year or so
- Ventilate rooms so frames don’t stay wet inside
- Clean frames with a soft cloth and soapy water
A yearly look round the frames is enough. Cracks and lifting edges are easy to spot early, and if anything looks wrong, just ring 0345 464 0079 or drop us an email.
Water trapped behind a failed joint can start rot in timber frames and sills. Rotten timber needs a joiner, not a sealant, so early resealing is worth it.
Should I try it myself first?
Overfilling a joint is a classic DIY mistake. A thick, smeared bead looks untidy and does not move well, and getting the depth right matters as much as the look.
Not every job suits DIY: high-level joints, fire-rated gaps, external movement joints and big jobs call for the right materials, safe access and experience.