Hampshire · England
External Mastic in South Ham
Specialist external mastic for South Ham: careful preparation, the right product and tidy work. Ask us for a quick quote.
- Rain getting behind render or cladding at a joint
- Weathered mastic that no longer stretches
- Brick movement joints where the sealant has split
External mastic in South Ham
Joints in render and cladding are easy to overlook until a damp patch appears. We look over the joints, agree the ones to renew and reseal with a flexible, weatherproof product. We work on copings & trims, façade panels and brickwork movement joints, and common reasons people get in touch are failed seals between different materials and sealant that has lost its bond to the brick or render.
Homes around South Ham range from older cottages to newer houses, with walls and rooflines of every type. Older gutters and trims need their joints resealed; newer brick and render need their movement joints kept sound.
The work is covered for a year after we finish. If anything isn’t right with it, phone 0345 464 0079 or send us an email.
- Where
- South Ham (RG22, RG21, RG23)
- Region
- Hampshire
- Guarantee
- A year, on every job
- Quote
- A clear price before we start
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
Leave it or put it right?
A properly done movement joint is an even line in a colour that suits the wall. A hurried job with smeared edges and no backing looks worse and fails sooner. In a smaller place like South Ham, wherever a wall is exposed, a failed outside joint is a real source of damp. Indoors, a failed seal lets water into floors and panels as it would anywhere.
Doing several joints on one visit is usually more efficient than separate visits. We will send you a clear quote for the lot.
What you get with us
- ARBOMaster approved applicator
- Homes, businesses and hotels
- Quality sealants from Arbo and Everbuild
- Full insurance on every job
Take a look at how sealant jobs are priced or what customers say.
Keeping the joints in good condition
Simple care keeps the joints in good condition. We recommend:
- Keep high-pressure jets off the joints
- Get split or bare joints resealed while the damage is small
- Ask before painting over external sealant
- Check external joints each spring
If you have more work done on the wall, such as new render, cladding or an opening, show the contractor the movement joints. They should be kept open and resealed, not filled.
Small splits are the time to act. Then it’s a straightforward cut-out and reseal.
For landlords and businesses
We also work for property managers and facilities teams. Several sites can go on one quote, and we are fully insured.
For anyone letting property in or around South Ham, several properties can be quoted together. Just tell us the addresses and what each one needs.
Honest limits
We won’t take on work that will not last, so these are the limits:
- Cracks in the bricks or render themselves, away from the joints
- Loose or hollow render, which needs re-rendering
- Rising or penetrating damp from elsewhere in the wall
Not sure which it is? You can call 0345 464 0079 or drop us an email and we’ll tell you honestly before you book.
Surfaces we seal
- Render & cladding joints
- Brickwork movement joints
- Façade panels
- Concrete & block
- Copings & trims
- Joints between brick and frames
South Ham: your questions answered
Can you do external mastic in South Ham?
Yes. We work across London and the South East, and South Ham is part of that. You can call 0345 464 0079 or drop us an email and let us know what needs doing, and we will give you a clear price.
Do you cover smaller places like South Ham?
Yes, South Ham is covered. Our work covers London and the South East, and smaller places are part of that. Longer journeys are simply planned in advance.
Do you seal joints where cladding meets other materials?
Yes. Where different materials meet is one of the most common joints we seal. We use a flexible sealant suited to both surfaces with primer where required.
Do you have insurance?
Yes. We’re fully insured, and we can confirm the details when we quote.
How long before the joint can be used?
Most sealants are touch-dry well before they’re fully cured. We will tell you how long to leave the joint.
Do the sealants smell?
Possibly a little. Any smell clears as the sealant cures.
Is it OK to fill a movement joint with cement?
No, not if it’s a movement joint. Pointing it stops it working and can lead to cracking. We will reseal it with a flexible sealant.
How do I get a quote for external mastic in South Ham?
There’s no set price, as it depends on the job: its size, the old material, access and the product needed. You will get a clear quote before work begins.
Can I do it myself?
The biggest DIY mistake is sealing over old sealant. New silicone will not bond to old, so it lifts and traps water and mould underneath. Everything old must be removed first.
If you’ve already had a go yourself, that is fine. We remove it and do the joint properly, so tell us about it when you ask for a quote.
What the job involves on each surface
Cladding and façade panels
Cladding and façade panels are generally separated by sealed joints. We reseal them with a sealant suited to the panel material.
Brickwork movement joints
Brick walls have vertical movement joints to absorb expansion. We reseal them with a low-modulus sealant over backing rod in a colour to suit the brick.
What happens on the day
At the end, we look at the finished work together. The work normally takes a few hours to a few days, depending on the length of joint and the access, depending on the size of the job. A visit to South Ham is planned like any other: the time, the access and where to park are agreed in advance. Outdoor jobs depend on a dry day, since sealant needs a dry surface.
- We look at every joint and agree a colour to suit the wall.
- Failed sealant is removed back to clean, sound faces.
- Backing rod goes in so the sealant can stretch between the two faces.
- 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
- Mention if the joints have been sealed before
- Clear the area around the work
- Plan for the work area to be out of bounds to pets and children
Getting a quote
A good description makes for an accurate quote. Let us know the location, the problem and roughly how many joints, and add photos by email if you can.
Read more
Outside joints around South Ham
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. Historic houses like The Vyne (about 3.5 miles north) are a reminder that the area around South Ham has older buildings as well as new. In older buildings, older walls and rooflines need a sealant that moves with them and suits the material.
Homes close to Saint Peter's Church include some older properties, and old and new materials meet at the roofline and walls, which is where sealant earns its keep. Rented homes near Basingstoke station change hands often, and split movement joints are easy to miss on a rental until damp shows inside. Schools such as St Anne's Catholic Primary School are buildings too, and larger buildings have long runs of movement joint that eventually need resealing.
South Ham is about 1 mile south-west of Basingstoke, in Hampshire. Whether you’re in the middle of South Ham or further out, we cover external mastic for every kind of property. Our area takes in 683 places across Hampshire, from the larger towns to small villages. You can also see our page for Reading, roughly 14 miles from South Ham.
Postcode districts we cover here for external mastic: RG22, RG21 and RG23. That includes homes and businesses on Pheby Road, Wella Road and Lennox Road and the roads around them. We also cover Brighton Hill (1 mile south), Basingstoke (1 mile north-east), Winklebury (1 mile north-west), Buckskin (1 mile west) and Worting (1 mile west). Further out, we also cover Farnborough (15 miles east), Fleet (12 miles east), Aldershot (15 miles east), Alton (10 miles south-east), Yateley (13 miles north-east) and Tadley (7 miles north).
Around South Ham
In South Ham, that means homes and buildings near Aldworth School, Coppice Spring School and Eastrop Park. For rail, the closest station is Basingstoke station, roughly 1.2 miles north-east. Well-known places in the area include Basingstoke and North Hampshire Hospital (1.5 miles north) and Basing House (2.7 miles east). For a walk, there’s Farleigh Hill and Daneshill Park Woods.