Hampshire · England
Headley Down External Mastic
External mastic for Headley Down and the surrounding area: the right sealant, proper preparation and a neat finish. Ask us for a quick quote.
- Rain getting behind render or cladding at a joint
- Weeds or debris growing in open joints
- Failed seals between different materials
About our external mastic in Headley Down
Low-level joints can usually be done from the ground. Where joints are higher up, tell us about the building when you get in touch and we will confirm what’s needed to reach them safely. Common call-outs are for failed seals between different materials and plants rooting in failed movement joints, across joints between brick and frames, render & cladding joints and brickwork movement joints.
In and around Headley Down, older properties sit alongside newer ones, each with its own outside joints. Older gutters and trims need their joints resealed; newer brick and render need their movement joints kept sound.
A one-year guarantee comes with the work, just as it does everywhere we cover.
- Place
- Headley Down (GU35)
- Region
- Hampshire
- Guarantee
- 12 months on all our work
- Quotes
- Quoted before any work starts
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
Looking after it afterwards
How long the joints last depends on use and care. We suggest:
- Keep movement joints as flexible joints, not mortar
- Wash walls gently around the sealant
- Ask before painting over external sealant
- Look over the joints every year, ideally after winter
Avoid pressure-washing straight into the joints. A strong jet can damage the edges of the bead.
If you can see gaps, plants or bare sections in a joint, have it checked. Earlier resealing means a smaller job and a better result.
What external mastic looks like in Headley Down
Compared with the north and west, the South East gets less rain, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
For an older house near a landmark such as Church of All Saints, older walls, gutters and the joints where extensions meet them need a flexible sealant. Schools such as The Holme Church of England Primary School are buildings too, and movement joints, cladding joints and gutters on larger buildings need the same care as a house’s.
Headley Down is about 6 miles south of Farnham, in Hampshire. We carry out external mastic for householders, landlords and businesses in Headley Down. 683 places in Hampshire are on our list, large and small. You can also see our page for Reading, about 24 miles away.
Postcode districts we cover here for external mastic: GU35. You will find streets such as Wilsons Road, Ludshott Grove and Fairview Road, and we cover them all. Headley Down is on the B3002, so it’s easy for us to get to. If you’re just outside Headley Down, we cover Arford (1 mile west), Headley (1 mile west), Wishanger Common (2 miles north), Standford (2 miles south-west) and Lindford (2 miles west). We also work in nearby towns such as Farnborough (12 miles north), Fleet (11 miles north), Aldershot (9 miles north), Alton (8 miles west), Petersfield (10 miles south-west) and Yateley (15 miles north).
What’s near Headley Down
Typical jobs here are in homes near Mill Chase Academy and the streets around them. For rail, the closest station is Liphook station, roughly 3.4 miles south of the centre. Nearby you’ll also find Chase Community Hospital (2.8 miles west). For a walk, there’s Gibbet Hill and Deadwater Valley.
Other services in Headley Down
Your questions about external mastic in Headley Down
Is Headley Down within the area you cover?
Yes, Headley Down is covered. Our work covers London and the South East, from towns to the smallest places. Longer journeys are simply planned in advance.
Do you cover Headley Down for external mastic?
Yes. We work across London and the South East, and Headley Down is part of that. You can ring 0345 464 0079 or email us and tell us what needs doing, and we will give you a clear quote.
Will it make a mess?
We keep the work tidy. We protect what’s around the joints, and we clear up when we’re done.
Do you work for landlords and businesses?
Yes, often. We can quote for several properties at once.
Can I add another job to the visit?
Yes. More than one area can be quoted together.
Can a movement joint be filled with mortar?
No. Rigid materials can’t move with the wall. If it has already been filled, we can normally cut it out and reseal it.
Do you work at height?
That depends on the building and the joints. We work on joints that can be reached safely. Tell us about the building and we’ll confirm what access is needed.
Will the new joint stand out?
Exterior sealants are made in a range of colours, from greys and browns to whites and stone shades. We pick the one that suits your wall best.
What happens on the day
On the day, we look over the joints with you first, so there are no surprises. Surfaces next to the work are protected before any work begins. The work normally takes a few hours for a handful of joints, longer for a whole elevation. A visit to Headley Down is planned like any other: the time, the access and where to park are agreed in advance. If the work is outside, the weather plays a part, as sealant needs a dry surface.
- We inspect the joints and agree which need resealing and how they’ll be reached.
- We cut out the failed sealant and rake out any dirt or growth.
- The joint faces are cleaned and primed where the sealant needs it.
- Backing rod goes in next, setting the depth and keeping the sealant off the back of the joint.
- The new sealant, chosen to suit the brick or render, is applied and tooled to a neat finish.
How to prepare
- Let us know about stairs, lifts or work at height
- Try not to wet indoor joints just before the visit
- Move anything stored near the joints
How to get a quote
A good description makes for an accurate quote. Tell us where the job is, what’s wrong and how much there is, and add pictures by email if you can.
Related advice
Signs you need external mastic in Headley Down
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.
Signs it’s time to call us include:
- Sealant that has lost its bond to the brick or render
- Failed sealant between panels on a façade
- Joints with sealant missing in places
- Failed seals between different materials
Rented homes near Liphook station change hands often, and failed wall and movement joints let damp in, so they’re worth checking between tenancies.
What your quote should include
- What insurance they hold
- How long to leave it before use
- Whether all the old sealant comes out first
- How the surfaces are prepared before sealing
Can I do it myself?
Sealing over old silicone is the commonest DIY error. Silicone does not stick to old silicone, so it peels away and traps moisture behind it. Everything old must be removed first.
If you’ve already had a go yourself, that is fine. We cut it out and start again.
Work for landlords, hotels and businesses
Hotels need rooms back in use, so the work can be planned room by room. We’ve worked in hotels as well as homes and businesses.
A neglected joint can let water reach the structure, which matters even more when someone else lives there. Keeping joints in good order is simple maintenance.
How we quote for external mastic
The quote reflects the job in front of us. We take into account:
- The number of rooms or windows
- Whether there’s mould to deal with
- The size of the job
- Any working-time requirements on site
Doing several joints on one visit usually makes better use of the time than several visits. You’ll get one clear quote for the whole job.
What we need to know
Before you ask for a quote, have a think about:
- What’s wrong with the joints now
- Where the job is, and your postcode
- Any previous sealing or DIY work
- How we’d reach the joints
If you’re in Headley Down and need external mastic, phone 0345 464 0079 or email us. A short description of the job and where it is helps us quote, and you will get a clear quote before we start.
When something else is needed
Before booking, it’s worth knowing the limits too:
- Failed render or damaged cladding panels
- Cutting new joints into brickwork, which is building work rather than sealant work
- Structural movement, which needs a surveyor or engineer
Not sure which it is? You can phone 0345 464 0079 or send us an email and we’ll tell you honestly before booking.
Surfaces we seal
- Render & cladding joints
- Concrete & block
- Brickwork movement joints
- Façade panels
- Copings & trims
- Joints between brick and frames