Hampshire · England
External & façade joints in Newnham, Hampshire
Our applicators work in Newnham on sealing brickwork movement joints, render, cladding and façade joints. Old sealant removed completely, joints prepared properly and every job guaranteed for a year.
- Joints where the bead has come unstuck
- Joints pointed up with cement by mistake
- Hard, crazed mastic that has stopped moving
External mastic in Newnham
Failed sealant is cut out, the depth set with closed-cell backing rod, and the joint resealed with a low-modulus sealant made for outside. We pick a colour that sits well with the wall so the joint doesn’t stand out. If you have water getting into walls through failed joints and plants rooting in failed movement joints, we can help, on concrete & block, façade panels and brickwork movement joints alike.
In a village or hamlet like Newnham, older cottages and farm buildings often stand in the open, where walls and rooflines take the weather head on. Joints on those walls need a sealant that moves with the building and stays in place.
We stand behind the work with a 12-month guarantee, so you’re not left on your own once the job is done.
- Place
- Newnham (RG27)
- Wider area
- Hampshire
- Guarantee
- One year on every job
- Price
- A clear quote up front
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
Work for landlords, hotels and businesses
Whether it’s one flat or a portfolio, you get the same standard of work: old sealant fully removed, joints prepared properly and a 12-month guarantee.
We work for letting agents and landlords as well as homeowners. Resealing between tenancies keeps a property looking cared for.
Newnham buildings and the weather
With historic houses such as The Vyne (about 4.6 miles west) nearby, there’s older building stock in the area around Newnham as well as newer homes. In older buildings, older brick and stone need a sealant that suits them, at the right joint depth. 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.
Rented homes near Hook station change hands often, and split movement joints are easy to miss on a rental until damp shows inside. Homes close to Church of St. Nicholas include some older properties, and an extension built onto an older house moves differently, and the joint between them takes the strain.
Newnham is about 5 miles east of Basingstoke, in Hampshire. We provide external mastic to householders, landlords and businesses in Newnham and the surrounding area. 683 places in Hampshire are on our list, large and small. We also work in Reading, about 12 miles from Newnham.
Work in RG27 works the same way as everywhere else we cover. We cover properties on Tylney Lane, Newnham Lane and Ridge Lane. Nearby, we also carry out external mastic in Nately Scures (1 mile south), Hook Common (1 mile south-east), Up Nately (1 mile south), Hook (1 mile east) and Warnborough Green (2 miles south-east). Larger places within reach include Basingstoke (5 miles west), Farnborough (10 miles east), Fleet (7 miles east), Aldershot (10 miles east), Alton (9 miles south) and Yateley (8 miles north-east).
Around Newnham
For rail, the closest station is Hook station, about 1.2 miles east. Nearby you’ll also find Odiham Castle (1.9 miles south-east) and Basing House (2.8 miles west). Not far away are Dogmersfield Lake and Tundry Hill.
When it isn’t the sealant
In fairness, there are a few things sealant will not fix:
- Adding movement joints to masonry that has none
- Failed render or damaged cladding panels
- Damp from another source, such as a leaking gutter or a bridged damp-proof course
Not sure which it is? You can call 0345 464 0079 or drop us an email and we will tell you honestly before you book.
Where we work in Newnham
- Concrete & block
- Copings & trims
- Render & cladding joints
- Façade panels
- Brickwork movement joints
- Joints between brick and frames
DIY sealant or a professional job?
If you do try it yourself, take your time over the preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it does not work out, we can still put it right.
Sealing over old silicone is the commonest DIY error. New silicone will not bond to old, so it peels away and traps moisture behind it. Everything old must be removed first.
Quotes for external mastic in Newnham
For a quick quote, just ask. The main things that affect it are:
- Whether there’s mould to deal with
- Whether the work is at height
- The old material and how stubborn it is
- The number of rooms or windows
There are no prices on our website, because each job is priced on what it involves. For a quick quote, please call 0345 464 0079 or send us an email.
Asking for a quote
To help us quote quickly, let us know:
- What the problem is, such as mould, gaps, leaks or cracking
- The address or postcode of the job
- Any previous sealing or DIY work
- Roughly how big the job is
Want a quote for external mastic? Please ring 0345 464 0079 or drop us an email and tell us about the job. We’ll explain what we’d do and give you a clear price before any work starts.
More services for Newnham
How to look after the new joints
Simple care keeps the joints in good condition. We recommend:
- Don’t let climbing plants root in the sealant
- Walk round the building once a year and look at the joints
- Get split or bare joints resealed while the damage is small
- Leave the joints unpainted unless we’ve said otherwise
Have a quick look at the joints each spring. Splits, gaps at the edges or plants in the joint are early warning signs.
Gaps, plants or missing sealant in a joint are worth getting looked at. Earlier resealing means a smaller job and a better result.
What the job involves on each surface
Copings and trims
Metal and stone copings both move with temperature, so a flexible sealant suits them best year round.
Render joints
Water behind render can lead to blown patches. A sound joint keeps the render dry behind.
Your questions about external mastic in Newnham
Do you cover Newnham for external mastic?
Yes. Our work covers London and the South East, and Newnham is part of that. You can ring 0345 464 0079 or email us and let us know what needs doing, and we’ll send you a clear quote.
Will you come out to Newnham?
Yes, we do. Our work covers London and the South East, and smaller places are part of that. The journey is planned ahead, so it helps to know about access.
Do you seal joints where cladding meets other materials?
Yes. Materials like render, brick, metal and uPVC all move differently, so the joint between them must be flexible. The sealant is matched to both sides.
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.
What should I tell you?
Tell us what needs doing and where. If we need more, we’ll ask.
How much does external mastic cost in Newnham?
The cost depends on the size of the job, access and how much old sealant has to come out. Call for a quick quote and we will talk you through it.
What do you put in the joint?
Quality sealants from brands including Arbo and Everbuild, chosen to suit the joint. We explain the product when we quote.
How long before the joint can be used?
Different products cure at different speeds, so follow the cure time we give you.
What we do, step by step
Every visit runs the same way: we check the joints, mask and protect the surrounding surfaces, carry out the job and tidy away. Most jobs take a few hours for a handful of joints, longer for a whole elevation. Somewhere like Newnham 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 start by walking round the building and agreeing the joints and the access.
- Every bit of old sealant and any mortar or debris is cut out.
- The faces are brushed clean and primed where the product requires it.
- Backing rod sized to the joint goes in to set the depth.
- We apply the sealant, tool it and check the whole run.
Preparing for the visit
- Plan for the work area to be out of bounds to pets and children
- Let us know about parking restrictions
- Tell us about any water getting in
Getting a quote
It all starts with a short chat. Describe the problem, the location and the size of the job. When it suits you, ring 0345 464 0079 or send us an email.