Hampshire · England
External Mastic in Neatham
Specialist external mastic for Neatham: the right sealant, proper preparation and a neat finish. Call for a quick quote.
- Gaps where render, brick and frames meet
- Damp patches traced to an open external joint
- Leaking joints around cladding and façade panels
Questions from Neatham
Is Neatham within the area you cover?
Yes, Neatham is covered. Our work covers London and the South East, from towns to the smallest places. Longer journeys are simply planned in advance.
Can you do external mastic in Neatham?
Yes. Our work covers London and the South East, and Neatham is part of that. You can ring 0345 464 0079 or drop us an email and tell us what needs doing.
How long before the joint can be used?
Most sealants are touch-dry well before they’re fully cured. We’ll give you the cure time for the product we used before we leave.
Should I try DIY first?
You can, for simple jobs. The key is preparation: remove all the old material and work on a clean, dry joint. If it does not work out, we can redo it.
Should I point up the gap in my brickwork?
No. Mortar locks the joint solid, so the movement cracks the wall elsewhere. It needs a flexible sealant over backing rod.
Will the old sealant be removed?
Yes. All of the old material is cut out and the joint cleaned before resealing.
Will there be a smell?
That depends on the sealant. Some products have a noticeable smell, others very little.
When will the joints need doing again?
There’s no fixed answer: sunny, exposed elevations and busy joints wear faster. Check them each year and reseal when they split or harden. Every job carries our 12-month guarantee.
External mastic for homes and businesses in Neatham
We’re ARBOMaster approved applicators, and each external joint gets a sealant suited to it. Some surfaces need a primer before sealing and we use one wherever it does. Typical jobs include failed sealant between panels on a façade and failed seals between different materials, on render & cladding joints, façade panels and brickwork movement joints.
Older homes in small places like Neatham may be stone, brick or timber-framed, often with later extensions. Where one material meets another is where water normally gets in.
We stand behind the work with a 12-month guarantee, so you’re not left on your own once the job is done.
- Location
- Neatham (GU34)
- Region
- Hampshire
- Guarantee
- A year, on every job
- Quotes
- Quoted before any work starts
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
The process
You do not need to clear the whole room or building before we come, just the space around the work. Everything nearby is protected, and the work takes anything from a few hours to several days, depending on the building in most cases. Somewhere as small as Neatham, access is often the only tricky part. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- We inspect the joints and agree which need resealing and how they’ll be reached.
- The old mastic and anything lodged in the joint is removed.
- Both sides are cleaned back to sound material and primed if needed.
- We push in closed-cell backing rod so the sealant is the right depth and bonds to the sides only.
- A flexible exterior sealant is applied and tooled in a colour to suit the wall.
Getting ready for the visit
- Try not to wet indoor joints just before the visit
- Mention any tricky access
- Mention any leaks or damp you’ve noticed
Getting a quote
For a quick quote, get us on the phone, or send an email if you’d rather. Tell us about the joints that need doing and we’ll talk you through the work before giving you a price.
Advice
What affects the quote in Neatham
The quote reflects the job in front of us. We look at:
- The number and length of the joints
- Any working-time requirements on site
- Whether old sealant or filler has to be cut out
- Access and height
There are no prices on our website, because the cost depends so much on the job itself. Call for a quick quote and we’ll talk you through it.
What to tell us for a quote
What to tell us when you ask for a quote:
- What’s wrong with the joints now
- How we’d reach the joints
- Whether it has been sealed before
- The address or postcode of the job
For external mastic in Neatham, ring 0345 464 0079 or email us. Tell us what the problem is and where, and you will get a clear quote before we start.
Can I do it myself?
The biggest DIY mistake is sealing over old sealant. Silicone doesn’t stick to old silicone, so it peels away and traps moisture behind it. All the old material has to come out first.
Too much sealant is as bad as too little. A heavy bead looks messy and copes badly with movement, and getting the depth right matters as much as the look.
Landlord and commercial work in Neatham
Housing providers, facilities teams and property managers book us too in Neatham and across Hampshire. We can quote a run of properties together, and we’re fully insured.
We work for landlords and letting agents as well as householders. Resealing between tenancies is a simple way to keep a property in good order.
Different surfaces, different methods
Copings and trims
Metal and stone copings both move with temperature, so the joints need a sealant that stays flexible in all weathers.
Brickwork movement joints
Brick movement joints are often mistaken for a missing mortar line. Where one has been mortared, we cut it out and reseal it with sealant.
Signs you need external mastic in Neatham
Weeds, moss and debris in a joint are a sign the sealant has gone. Roots and dirt hold water against the wall and make things worse.
The problems people normally mention when they call are:
- Movement joints with cracked, split or missing sealant
- Damp patches traced to an open external joint
- Plants rooting in failed movement joints
- Panel joints letting water in
Rented homes near Alton station change hands often, and split movement joints are easy to miss on a rental until damp shows inside.
Comparing quotes
- Whether they seal over old material or remove it
- Whether the sealant suits the joint
- How hidden problems are handled
- Is VAT in the price?
Nearby places to Neatham
Other services in Neatham
Why deal with it now?
Running new sealant over the old bead rarely lasts. The new layer cannot bond properly to old, weathered material, so we always take the old sealant out. In a small place like Neatham, homes can be exposed to wind and rain, which finds any gap, and older walls, once damp, take a long time to dry.
Doing several joints on one visit generally makes better use of the time than several visits. You’ll get one clear quote for the whole job.
Why choose Mr Mastic in Neatham
- Old sealant always removed completely
- White, clear, grey or another colour, product permitting
- Anti-fungal silicone where joints get wet
- Full insurance on every job
Take a look at what affects the cost or customer reviews.
Walls and rooflines in Neatham
With historic houses such as Bentworth Hall (about 4.8 miles west) nearby, there’s older building stock in the area around Neatham 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. The South East is one of the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
If you look after a building such as Andrews' Endowed Church of England Primary School, its movement joints, gutters and trims need looking after like any other building’s. For an older house near a landmark such as Holy Rood Church, an extension built onto an older house moves differently, and the joint between them takes the strain.
Neatham is about 2 miles north-east of Alton, in Hampshire. Wherever you are in the GU34 postcode area, we cover external mastic for homes and businesses. Our Hampshire coverage runs to 683 places, Neatham among them. There’s also a page for Reading, roughly 20 miles from Neatham.
Postcode districts we cover here for external mastic: GU34. If you are just outside Neatham, we cover Holybourne (1 mile north-west), Wyck (1 mile south-east), Upper Froyle (1 mile north-east), Alton (2 miles south-west) and East Worldham (2 miles south). Within a short drive, we also cover Basingstoke (10 miles north-west), Farnborough (12 miles north-east), Fleet (9 miles north-east), Aldershot (10 miles north-east), Petersfield (11 miles south) and Yateley (13 miles north).
Landmarks near Neatham
We work in homes and buildings around Treloar School, White Hart pub and Eggar's School and the streets around them. For rail, the closest station is Alton station, about 1.3 miles south-west. Well-known places in the area include Allen Gallery (1.6 miles south-west) and Alton Community Hospital (2.6 miles south-west). Green spaces nearby include Holybourne Hill.