Hampshire · England
External Mastic in Nyewood
Movement joints in Nyewood need attention? We cut out the old, prepare the joints and apply the right sealant.
- Joints where the bead has come unstuck
- Movement joints filled with mortar instead of sealant
- Moss and dirt in joints with no sealant left
About our external mastic in Nyewood
Getting the depth right is half the job. Backing rod controls how deep the sealant goes and keeps it off the back of the joint, leaving it bonded to two faces so it can move with the wall. Common call-outs are for rain getting behind render or cladding at a joint and brick movement joints where the sealant has split, across joints between brick and frames, façade panels and brickwork movement joints.
Around Nyewood, 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.
There’s a 12-month guarantee on every job, large or small.
- Where
- Nyewood (GU31)
- Region
- Hampshire
- Guarantee
- 12 months on all our work
- Quote
- A clear quote up front
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
Common questions in Nyewood
Is Nyewood within the area you cover?
Yes, smaller places are covered as well as towns. We work across London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
Can you help a landlord with a rental near Petersfield station?
Yes, landlords and agents are among the people we work for. You can ring 0345 464 0079 or email us with the details for a clear quote.
Do the sealants smell?
Sometimes, a little. It fades as the sealant cures, and ventilation helps.
How often do external joints need resealing?
That varies with the weather the wall faces, how much it moves and the sealant used. Treat it as a maintenance item and look at it yearly.
Do I need to be at home?
That depends on where the joints are. For work indoors, someone needs to let us in.
How long should I leave it?
It depends on the product. Before we leave, we’ll tell you the cure time.
Can you match the colour of my brickwork?
There’s a good range of exterior colours, including greys, browns, whites and stone tones. We choose the closest to your brick or render so it does not stand out.
What is backing rod for?
We fit closed-cell backing rod wherever the joint depth needs controlling. It sets the sealant depth and prevents three-sided bonding, so the joint can move.
DIY sealant or a professional job?
The biggest DIY mistake is sealing over old sealant. New silicone won’t bond to old, so it peels away and traps moisture behind it. All the old material has to come out first.
If you’re set on DIY, put the effort into preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it does not work out, we can still put it right.
What affects the cost of external mastic
Jobs vary more than people expect. What affects the quote:
- The type of sealant required
- Whether there’s mould to deal with
- When we can work, for business premises
- The old material and how stubborn it is
Homes and businesses are quoted the same way: the amount of work, the access and the products needed, along with when we can work on site. Call for a quick quote and we will explain what it covers.
What to tell us for a quote
To make quoting easier, please include:
- Where the property is
- Any previous sealing or DIY work
- Photos by email, if that’s easy
- Any access issues, like height or stairs
The more we know about the job, the more useful the quote. Let us know the location, the problem and roughly how many joints.
Different surfaces, different methods
Joints between dissimilar materials
Each side of the joint may need its own preparation. We prepare both faces so the sealant bonds properly.
Concrete and blockwork
The face of concrete or block is often dusty, so cleaning and priming matter. A primer goes on where the product requires one before sealing.
Nearby places to Nyewood
What else we do in Nyewood
Aftercare tips
Once the sealant has cured, a few habits help it last:
- Point out the joints to other trades
- Make sure movement joints aren’t pointed over
- Avoid pressure-washing directly into sealant joints
- Act on the first splits you see
Avoid pressure-washing straight into the joints. High-pressure water can lift the edges and let water in behind.
Gaps, plants or missing sealant in a joint are worth getting looked at. Early work is quicker and leaves a better finish.
Nyewood buildings and the weather
With historic houses such as Uppark (about 2.7 miles south-west) nearby, there’s older building stock in the area around Nyewood as well as newer homes. Where a home is older, older walls and rooflines need a sealant that moves with them and suits the material. 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.
Uppark, about 2.7 miles south-west, is one of the historic houses in the wider area around Nyewood. Rented homes near Petersfield station change hands often, and failed wall and movement joints let damp in, so they’re worth checking between tenancies.
Nyewood is about 3 miles east of Petersfield, in Hampshire. Across the GU31 area, we can carry out external mastic at your property. Nyewood is one of 683 towns and villages in Hampshire we cover. Our Portsmouth page covers work nearby.
All of GU31 is covered for external mastic, from the main roads to the quietest streets. We also cover the places around Nyewood: East Harting (1 mile south), South Harting (2 miles south-west), Elsted (2 miles south-east), Dumpford (2 miles east) and Elsted Marsh (2 miles east). Larger places within reach include Havant (10 miles south-west), Horndean (9 miles south-west), Alton (12 miles north-west), Waterlooville (10 miles south-west), Petersfield (3 miles west) and Purbrook (11 miles south-west).
Near you in Nyewood
The nearest railway station is Petersfield station, roughly 3.7 miles west. Well-known places in the area include Bear Museum (3.4 miles west) and Petersfield Community Hospital (3.7 miles west). Open spaces near Nyewood include Oakham Hill and Iping and Stedham Commons.
How it works
Before we leave, we go over the finished joints with you and explain the cure time. The visit itself normally takes anything from a few hours to several days, depending on the building, depending on the size of the job. Somewhere like Nyewood needs a little journey planning: let us know about lanes, gates and parking. We bring what the job needs, so it can be finished in one trip where possible.
- Each joint is checked and the colour of the new sealant agreed.
- Failed sealant is removed back to clean, sound faces.
- Closed-cell backing rod is pushed in so the sealant bonds to two sides only.
- Primer is applied wherever the sealant needs it.
- A low-modulus exterior sealant is gunned in and tooled to a neat finish.
Preparing for the visit
- Plan for the work area to be out of bounds to pets and children
- Tell us about any water getting in
- Let us know about earlier repairs to the joints
How to get a quote
Asking for a quote is easy: let us know what needs doing and where. A few pictures by email make the job easier to understand, and we’ll take it from there.
Related advice
For landlords and businesses
In hotels, rooms out of use cost money, so we plan the work room by room. Hotel work is part of what we do, alongside homes and businesses.
We regularly work with letting and managing agents. Tell us the address, the job and how access works and we’ll give you a quote.
Why it’s worth doing now in Nyewood
Water gets in through a failed movement joint. Dealing with it early keeps the repair to the joint, instead of the wall and finishes around it. Around Nyewood, older homes often have timber in their floors and frames, and water through a failed joint can rot timber if it’s left.
What it costs depends on the amount of work, how hard the old material is to remove and how easy the joints are to reach. We give a clear quote before work begins.
Why book with us
- A choice of colours where the product allows
- Tidy, careful work
- Any old sealant cut out fully, not covered over
- 180+ five-star Google reviews
Take a look at how sealant jobs are priced or our reviews.