Hampshire · England
External Mastic in Warnford
External mastic for Warnford and the surrounding area: the right sealant, proper preparation and a neat finish. Ask us for a quick quote.
- Brick movement joints where the sealant has split
- Panel joints letting water in
- Gaps where render, brick and frames meet
How we handle external mastic in Warnford
Short cuts in external joints show up within a season or two. New sealant over old, joints packed with mortar and beads with no backing all tend to fail early. We strip the joint back and start again. We work on joints between brick and frames, copings & trims and brickwork movement joints, and people most often call us about movement joints with cracked, split or missing sealant and panel joints letting water in.
Older homes in small places like Warnford may be stone, brick or timber-framed, often with later extensions. The joints where those materials meet are the weak points.
Our work is backed for twelve months, and the guarantee is the same wherever you are.
- Place
- Warnford (SO32)
- Region
- Hampshire
- Guarantee
- A year, on every job
- Quotes
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
Looking after it afterwards
Once the sealant has cured, a few habits help it last:
- Wash walls gently around the sealant
- Clear growth from the base of walls and joints
- Leave the joints unpainted unless we have said otherwise
- Deal with leaking gutters that soak the joints below
Have a quick look at the joints each spring. Splits, gaps at the edges or plants in the joint are early warning signs.
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.
Warnford questions
Can you do external mastic in Warnford?
Yes, Warnford is within the area we cover. We work across London and the South East. You can ring 0345 464 0079 or email us and let us know what needs doing.
Is there a guarantee on external mastic in Warnford?
All our work, in Warnford and everywhere else, comes with a 12-month guarantee. We are fully insured, and an ARBOMaster approved applicator.
Will there be a smell?
Possibly a little. It fades as the sealant cures.
Should I point up the gap in my brickwork?
No. A mortar-filled joint can’t move, so the movement cracks the wall elsewhere. It needs a flexible sealant over backing rod.
Do you take out the old sealant first?
Yes, always, and completely. New silicone doesn’t stick to old silicone, so the joint is cleaned back first.
When is the sealant fully cured?
It depends on the product and the conditions. We tell you how long to leave it before we go.
What do you put in the joint?
The product depends on the job: anti-fungal sanitary silicone in wet areas, and other sealants where joints move or face the weather. Brands we use include Arbo and Everbuild.
Where do you work from?
We work from Crawley. Our applicators cover Warnford.
What the job involves on each surface
Joints between dissimilar materials
Where a frame or panel meets masonry, water often finds a way in. The old joint is removed and a sealant that bonds to both sides goes in.
Brickwork movement joints
Brick moves with heat and moisture, and grows a little over time. The movement joint takes that up, so its sealant has to stay flexible.
The process
When we get to you, we compare the joints with what we discussed. If anything is different, we explain it before carrying on. After that, the work takes a few hours for a handful of joints, longer for a whole elevation. Somewhere as small as Warnford, access is often the only tricky part. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- First, the joints are inspected and the access agreed.
- Every bit of old sealant and any mortar or debris is cut out.
- The faces are brushed clean and primed where the product requires it.
- Backing rod sized to the joint goes in to set the depth.
- The exterior sealant is applied, tooled and checked along its length.
Getting ready for the visit
- Tell us if parking is tricky
- Tell us about access, such as stairs, a lift or high-level joints
- Try not to wet indoor joints just before the visit
Getting a quote
For external mastic in Warnford, ring 0345 464 0079 or email us. Tell us what the problem is and where, and we will agree the price before any work begins.
Read more
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 need the right product, the right access and the right method.
Sealing over old silicone is the commonest DIY error. 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.
What external mastic looks like in Warnford
Rainfall in the South East is lower than in much of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind. With historic houses such as Hinton Ampner House (about 3.1 miles north-west) nearby, there’s older building stock in the area around Warnford as well as newer homes. In older buildings, older brick and stone need a sealant that suits them, at the right joint depth.
In and around Warnford, as anywhere, good external mastic starts with a clean, dry, properly prepared joint.
Warnford is about 8 miles west of Petersfield, in Hampshire. We provide external mastic to homes and businesses in Warnford and the surrounding area, as part of our work across Hampshire. Our Hampshire coverage runs to 683 places, and Warnford is one of them. Our Southampton page covers work nearby, about 14 miles away.
Here we cover the SO32 postcode area for external mastic. Close by, we work in Bramdean (3 miles north), Hinton Ampner (3 miles north-west), Beauworth (3 miles north-west), Cheriton (4 miles north-west) and Bishop's Sutton (5 miles north). Larger places within reach include Winchester (10 miles west), Gosport (14 miles south), Havant (11 miles south-east), Eastleigh (11 miles west), Fareham (11 miles south) and Horndean (8 miles south-east).
Local landmarks in Warnford
In Warnford, that means homes and buildings near The George And Falcon Inn, among other places. For a walk, there’s Shutts Copse and Beacon Hill.
Towns and villages near Warnford
Other services in Warnford
Common problems we fix in Warnford
The wrong product in a moving joint is a classic cause. A stiff, general-purpose sealant can’t cope with a joint that moves a lot, and it tears off the sides.
The most common problems we see are:
- Rigid filler in a joint that should flex
- Cracked joints where brick meets render or frames
- Movement joints with cracked, split or missing sealant
- Moss and dirt in joints with no sealant left
For an older house near a landmark such as Church of Our Lady, old and new materials meet at the roofline and walls, which is where sealant earns its keep.
What to look for in a quote
- When the joint can take water or movement
- Who does the work, and how experienced they are
- How the joint is cleaned and prepared
- What insurance they hold
When it isn’t the sealant
It helps to know what we can’t do:
- Walls that need new movement joints cut into them
- Loose or hollow render, which needs re-rendering
- Damp that isn’t coming from the joint
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
- Façade panels
- Copings & trims
- Render & cladding joints
- Concrete & block
- Brickwork movement joints
- Joints between brick and frames
For landlords and businesses
Hotels need rooms back in use, so we plan the work room by room. We’ve worked in hotels as well as homes and businesses.
We work for landlords and agents as well as homeowners. Sealant work between tenants keeps a property looking cared for before the next move-in.