Hampshire · England
External & façade joints in Whitehill, Hampshire
Sealing brickwork movement joints, render, cladding and façade joints for homes and businesses in Whitehill and across Hampshire. ARBOMaster approved applicators, fully insured, with a one-year guarantee.
- Joints pointed up with cement by mistake
- Weeds or debris growing in open joints
- Leaking joints around cladding and façade panels
Do you need external mastic in Whitehill?
Sunlight, wet weather and frost wear exterior sealant down. Over the years it hardens, cracks on the surface and loses its give, so the joint eventually tears or comes away from one side.
Common reasons people contact us are:
- Moss and dirt in joints with no sealant left
- Joints pointed up with cement by mistake
- Sealant that has lost its bond to the brick or render
- Joints with sealant missing in places
If you look after a building such as Woodlea Primary School, larger buildings have long runs of movement joint that eventually need resealing.
Comparing quotes
- What product goes in the joint
- Whether all the old sealant comes out first
- What happens if the job turns out different
- Whether you can choose the colour
How we handle external mastic in Whitehill
We’re ARBOMaster approved applicators, and each external joint gets a sealant suited to it. Porous or awkward surfaces are primed where the sealant needs it and we use one wherever it does. We’re often asked to deal with sealant pulling away from one side of the joint and damp patches traced to an open external joint, across brickwork movement joints, joints between brick and frames and façade panels.
Outbuildings, garages and conservatories around homes in places like Whitehill add more joints to look after. Gutter ends, garage door frames and the joints where an extension meets the house are typical spots for leaks.
We stand behind the work with a 12-month guarantee.
- Location
- Whitehill (GU35)
- Wider area
- Hampshire
- Cover
- 12 months on all our work
- Quote
- Quoted before any work starts
- Call
- 0345 464 0079
- Updated
- 26 October 2026
Leave it or put it right?
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 an older home around Whitehill, damp from a failed joint can get into timber and plaster, and that is a much bigger job than renewing the sealant.
Leaving a failed joint generally makes the job bigger, not smaller, as water and mould keep getting in. If you are unsure, phone 0345 464 0079 or email us for an honest opinion and a quote.
Why Whitehill clients choose us
- Old sealant always removed completely
- A sealant colour to suit the surroundings
- ARBOMaster approved applicator
- Homes, businesses and hotels
Whitehill: your questions answered
Do you cover Whitehill for external mastic?
Yes, Whitehill is within the area we cover. We work across London and the South East. Just ring 0345 464 0079 or email us with a few details of the job, and we’ll give you a clear price.
Will you come out to Whitehill?
Yes, Whitehill is covered. Our work covers London and the South East, from towns to the smallest places. The journey is planned ahead, so it helps to know about access.
What colours does the sealant come in?
There’s a good range of exterior colours, including greys, browns, whites and stone tones. We pick the one that suits your wall best so the joint doesn’t draw the eye.
What is a movement joint?
Brickwork, render and cladding all move a little, and planned joints take up that movement. The gap is sealed with a flexible sealant over backing rod.
Is it OK to fill a movement joint with cement?
No, not if it’s a movement joint. Filling it with mortar defeats its purpose and can lead to cracking. A flexible sealant is the right fill.
How long does the job take?
That depends on the amount of work, but as a guide it takes a few hours for a handful of joints, longer for a whole elevation. We’ll give you a better idea when we quote.
Do you remove the old sealant?
Always. Sealing over the old bead is the commonest cause of early failure, and it’s something we never do.
What should I tell you?
Tell us what needs doing and where. We will ask anything else we need to know.
What affects the cost of external mastic
Some jobs are bigger than they look, and some smaller. What affects the quote:
- Any working-time requirements on site
- Any mould that needs treating
- How easy the joints are to reach
- The number and length of the joints
No two jobs are quite the same, so we quote each one individually. Size, access and the product the joint needs all make a difference.
What we need to know
When you contact us, these details help:
- If someone has resealed it before
- A few photos by email, if you can
- What’s wrong with the joints now
- The rough size of the job
Need a quote? Please phone 0345 464 0079 or send us an email and tell us about the job. You will know what we plan to do, and what it will cost, before any work begins.
Nearby places to Whitehill
Also in Whitehill
What the job involves on each surface
Cladding and façade panels
If the façade has a specified sealant, that is what we use, or one the system allows. Tell us what the building has when you get in touch.
Brickwork movement joints
Brick walls have vertical movement joints to absorb expansion. They’re resealed over backing rod with a low-modulus sealant coloured to suit the wall.
What we do, step by step
There is not much for you to do on the day. Show us the job and we’ll take it from there. The work itself takes a few hours to a few days, depending on the length of joint and the access. For a job in Whitehill, we agree the time, the access and parking before the day. Outdoor jobs depend on a dry day, since sealant needs a dry surface.
- First, the joints are inspected and the access agreed.
- Every bit of old sealant and any mortar or debris is cut out.
- Joint faces are cleaned back and primed if the sealant needs 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
- Mention any parking rules near the property
- Try not to wet indoor joints just before the visit
- For business premises, tell us about site rules or sign-in
Getting a quote
There’s no standard price list, because every job is different. Instead, your job gets its own clear quote. To get started, ring 0345 464 0079 or drop us an email.
Related advice
DIY sealant or a professional job?
Some jobs are best left to a professional: high-level joints, fire-rated gaps, external movement joints and big jobs call for the right materials, safe access and experience.
Sealing over old silicone is the commonest DIY error. Silicone does not stick to old silicone, so it lifts and traps water and mould underneath. Everything old must be removed first.
What external mastic looks like in Whitehill
Compared with the north and west, the South East gets less rain, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
In the older streets around St Mark's Sacred Church, old and new materials meet at the roofline and walls, which is where sealant earns its keep. For landlords with property near Liphook station, outside joints that have cracked can let damp into a rental, so check them between lets.
Whitehill is about 6 miles south-east of Alton, in Hampshire. From the centre of Whitehill to the outskirts, we cover external mastic for every kind of property, from flats and houses to offices and hotels. Across Hampshire, we cover 683 places, and Whitehill is one of them. You can also see our page for Portsmouth, about 22 miles away.
We work across GU35 for external mastic and the streets around it. If you need external mastic at a property on Stubbington Avenue, Petersfield Road and Dudley Close or a nearby road, we can help. We also cover the places around Whitehill: Hollywater (1 mile east), Bordon (1 mile north), Deadwater (1 mile north-east), Pinewood Village (1 mile north) and Standford (1 mile east). We also work in nearby towns such as Basingstoke (15 miles north-west), Farnborough (14 miles north), Fleet (12 miles north), Horndean (15 miles south-west), Aldershot (11 miles north-east) and Alton (6 miles north-west).
Around Whitehill
We work in homes and buildings around St Matthew's Church and Mill Chase Academy, among other places. Whitehill’s nearest station is Liphook station, roughly 3.7 miles south-east of the centre. Well-known places in the area include The Romany Museum (3.2 miles west) and Chase Community Hospital (within half a mile north-east). Green spaces nearby include Selborne Hill and Deadwater Valley.
How to look after the new joints
Simple care keeps the joints in good condition. We recommend:
- Check the sealant is paintable before painting near it
- Show decorators and builders where the movement joints are
- Keep high-pressure jets off the joints
- Fix overflowing gutters above sealed joints
Only paint over the joint if we have confirmed the sealant can take paint. Paint can crack on a flexible joint, and paint can crack as the joint moves.
A joint that has stopped moving pushes the movement elsewhere, often as cracks near the joint. Resealing it early helps prevent that.