Buckinghamshire · England
External Mastic in Nash Lee
We cover Nash Lee for sealing brickwork movement joints, render, cladding and façade joints. Old sealant removed completely, joints prepared properly and every job guaranteed for a year.
- Panel joints letting water in
- Damp patches traced to an open external joint
- Brick movement joints where the sealant has split
External mastic for homes and businesses in Nash Lee
Movement joints let brickwork, render and cladding expand and shrink without cracking. Its sealant has to flex with the building, season after season, and when it fails, the wall takes the strain and water finds a way in. If you have hard, crazed mastic that has stopped moving and failed seals between different materials, we can help, on render & cladding joints, façade panels and brickwork movement joints alike.
Around Nash Lee, older buildings can be stone, brick or timber-framed, many with extensions added later. The joints where those materials meet are the weak points, and they need the right sealant at the right depth.
You are covered for a year from the day we finish. If anything is not right with it, call 0345 464 0079 or drop us an email.
- Where
- Nash Lee (HP17)
- Region
- Buckinghamshire
- Cover
- A year, on every job
- Quotes
- Quoted before any work starts
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
Common questions in Nash Lee
I let a flat near Stoke Mandeville station. Can you help?
Yes, landlords and agents are among the people we work for, and several properties can go on one quote. You can phone 0345 464 0079 or drop us an email with the details for a clear quote.
Can you do external mastic in Nash Lee?
Yes. We work across London and the South East, and Nash Lee is part of that. Just phone 0345 464 0079 or email us with a few details of the job, and we will give you a clear quote.
Where do you work from?
We are a Crawley-based firm. Our area covers South East England, London and Scotland.
Do I have to be there?
Access is agreed with you when the job is booked. Indoors, that usually means someone at home.
Why do you put foam in the joint first?
Backing rod goes into deeper joints as a matter of course. It controls the depth and stops the sealant bonding to the back.
Are you an approved applicator?
Yes. We are approved under the ARBOMaster scheme, the approved applicator scheme for Arbo sealants.
Do you do commercial work?
Yes. We’ve worked for hotels, offices and other businesses.
Will the old sealant be removed?
Yes. Sealing over the old bead is the commonest cause of early failure, so we never do it.
Why it’s worth doing now in Nash Lee
Pointing a movement joint with mortar might seem a neat fix, but it locks the joint solid. The wall then cracks somewhere else. A flexible sealant over backing rod is what the joint needs. Older cottages and farmhouses around Nash Lee can have timber floors and frames, and water through a failed joint can rot timber if it’s left.
We do not show prices on the website, because each job is priced on what it involves. Call for a quick quote.
Why choose Mr Mastic in Nash Lee
- Over 20 years’ experience
- Homes, businesses and hotels
- Colour picked to suit the job
- We never seal over old sealant
See our cost guide and what customers say.
What affects the quote in Nash Lee
We quote each job individually. This is what makes a difference:
- Access and height
- The size of the job
- The product the joint needs
- Whether old sealant or filler has to be cut out
Doing several joints on one visit generally makes better use of the time than several visits, so it’s worth mentioning everything you’d like done. We’ll give you a clear price for the lot.
What we need to know
Photos help, but a description is a good start. Try to tell us:
- Pictures of the joints, sent by email
- The problem you’ve noticed
- Where the job is, and your postcode
- The rough size of the job
For a quick quote, get us on the phone, or send an email if you’d rather. Describe what needs sealing and we’ll talk you through the work before giving you a price.
Surface by surface
Cladding and façade panels
Cladding and façade panels are generally separated by sealed joints. Each joint gets a sealant that suits the panel and its movement.
Concrete and blockwork
Big joints in concrete need careful depth control. We size the backing rod to the gap so the sealant is not too deep.
The process
There’s no need to move everything out, just the space around the work. Everything nearby is protected, and the work takes a few hours to a few days, depending on the length of joint and the access for a typical job. For a village or hamlet like Nash Lee, the journey is planned in advance: let us know about lanes, gates and parking. Everything for the job comes with us, so a second trip is avoided where possible.
- Each joint is checked and the colour of the new sealant agreed.
- We take out the old sealant until the faces are sound.
- Backing rod goes in so the sealant can stretch between the two faces.
- We prime the faces where required.
- We gun in low-modulus sealant and tool it neatly.
Getting ready for the visit
- On commercial sites, let us know about site rules
- Mention any leaks or damp you’ve noticed
- Keep children and pets away from the work area
Ask for a quote
Quotes start with a quick conversation. Tell us what’s wrong, where it is and how much there is. Whenever you’re ready, ring 0345 464 0079 or drop us an email.
Advice
Nearby places to Nash Lee
Other services in Nash Lee
What we cannot put right
In fairness, there are a few things sealant will not fix:
- Damp from another source, such as a leaking gutter or a bridged damp-proof course
- Cracked brickwork or render that needs a builder or plasterer
- Loose or hollow render, which needs re-rendering
If in doubt, ring 0345 464 0079 or email us and we’ll say what we think before booking.
Surfaces we seal
- Joints between brick and frames
- Render & cladding joints
- Façade panels
- Concrete & block
- Brickwork movement joints
- Copings & trims
Nash Lee buildings and the weather
Rainfall in the South East is lower than in much of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
For an older house near a landmark such as Church of St Peter and St Paul, old and new materials meet at the roofline and walls, which is where sealant earns its keep. Schools such as John Colet School are buildings too, and larger buildings have long runs of movement joint that eventually need resealing. For landlords with property near Stoke Mandeville station, outside joints that have cracked can let damp into a rental, so check them between lets.
Nash Lee is about 4 miles south-east of Aylesbury, in Buckinghamshire. Jobs in Nash Lee get the same care as everywhere else we work: old sealant removed completely, careful preparation and a 12-month guarantee. Our Buckinghamshire coverage runs to 263 places, and Nash Lee is one of them. There’s also a page for Oxford, roughly 19 miles from Nash Lee.
Postcode districts we cover here for external mastic: HP17. Neighbouring places we cover for external mastic include Terrick (1 mile south), Chalkshire (1 mile south), North Lee (1 mile north-west), Butler's Cross (1 mile south) and Ellesborough (1 mile south). Larger places within reach include Aylesbury (4 miles north-west), High Wycombe (10 miles south), Chesham (8 miles south-east), Marlow (13 miles south), Amersham (10 miles south-east) and Beaconsfield (12 miles south-east).
Near you in Nash Lee
We work in homes and buildings around The Russell Arms. Nash Lee’s nearest station is Stoke Mandeville station, about 1.4 miles north. Nearby you will also find Little Kimble Motte (1.5 miles south-west) and National Paralympic Heritage Centre (2.5 miles north). For a walk, there’s Coombe Hill and Brush Hill Local Nature Reserve.
Landlords, agents and businesses in Nash Lee
If you manage several properties in or around Nash Lee, jobs at different addresses can go on one quote. Send us the addresses and the work at each, and photos by email help.
We regularly work with letting and managing agents. Send the address, what’s needed and the access arrangements.
DIY sealant or a professional job?
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.
If you’ve already had a go yourself, that’s fine. We remove it and do the joint properly, so tell us about it when you ask for a quote.