Hampshire · England
External Mastic in North Warnborough
External mastic for North Warnborough, by sealant specialists with 20+ years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Weathered mastic that no longer stretches
- Joints where the bead has come unstuck
- Damp patches traced to an open external joint
How it works
At the end, we look at the finished work together. The work normally takes a few hours for a handful of joints, longer for a whole elevation, depending on the size of the job. Somewhere like North Warnborough needs a little journey planning: tell us about narrow lanes, gates, long drives and where we can park. We bring what the job needs, so it can be finished in one trip where possible.
- 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.
- 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.
- We gun in a flexible exterior sealant in a colour that suits the wall and tool it neatly.
Before we arrive
- Mention any leaks or damp you’ve noticed
- Try not to wet indoor joints just before the visit
- Mention any sign-in or site rules at work premises
How to get a quote
We do not publish a price list, as no two jobs are quite the same. Instead, your job gets its own clear quote. To get started, ring 0345 464 0079 or send us an email.
Related advice
About our external mastic in North Warnborough
Joints between dissimilar materials, like brick against render or concrete against a steel frame, see movement from both sides. A flexible exterior sealant takes up that movement where mortar or filler would crack. If you have rigid filler in a joint that should flex and sealant pulling away from one side of the joint, we can put it right, whatever the surface.
External sealant needs dry, clean surfaces, so work around North Warnborough is planned for dry weather. Tell us about access to all sides of the building, including outbuildings and garages.
A one-year guarantee comes as standard, so you are not left on your own once the job is done.
- Location
- North Warnborough (RG29)
- Region
- Hampshire
- Guarantee
- A year, on every job
- Quotes
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
External mastic in North Warnborough: local notes
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.
If you look after a building such as Robert May's School, movement joints, cladding joints and gutters on larger buildings need the same care as a house’s. Homes close to All Saints Church include some older properties, and old and new materials meet at the roofline and walls, which is where sealant earns its keep.
North Warnborough is about 5 miles west of Fleet, in Hampshire. Jobs in North Warnborough get the same care as everywhere else we work: old sealant removed completely, careful preparation and a 12-month guarantee. Our area takes in 683 places across Hampshire. There’s also a page for Reading, about 13 miles away.
We work across the RG29 postcode area for external mastic. That includes homes and businesses on Whitewater Road, Queens Road and New Road and the roads around them. Nearby, we also carry out external mastic in Odiham (1 mile south-east), Warnborough Green (1 mile north-west), Greywell (1 mile west), Broad Oak (1 mile east) and Hook Common (2 miles north-west). Larger places within reach include Basingstoke (6 miles west), Farnborough (8 miles east), Fleet (5 miles east), Aldershot (8 miles east), Alton (8 miles south) and Yateley (8 miles north-east).
What’s near North Warnborough
Typical jobs here are in homes near The Anchor Inn and Mayhill Junior School, among other places. For rail, the closest station is Hook station, about 1.5 miles north. A little further out are Odiham Castle (0.5 miles north-west) and West Green House Agricultural Museum (3.1 miles north). Green spaces nearby include Tundry Hill and The Mill Field.
Landlords, agents and businesses in North Warnborough
Water getting past a failed joint can damage the building, which matters even more when someone else lives there. Resealing at the right time is simple maintenance.
Housing providers, facilities teams and property managers book us too in North Warnborough and across Hampshire. Several sites can be quoted together.
Why deal with it now?
Sealing over the top of old mastic doesn’t hold for long. New sealant does not bond well to old, weathered sealant, so we always take the old sealant out. Older cottages and farmhouses around North Warnborough can have timber floors and frames, and water through a failed joint can rot timber if it’s left.
Leaving a failed joint usually makes the job bigger, not smaller, because water and mould keep working on it. If you’re not sure whether it needs doing, call 0345 464 0079 or email us and we’ll give you an honest view and a quote.
Why book with us
- Colour picked to suit the job
- Over 20 years’ experience
- White, clear, grey or another colour, product permitting
- We’re fully insured
Take a look at what affects the cost or what customers say.
How the job changes by surface
Concrete and blockwork
Concrete and block walls shrink as they dry and move with temperature. We reseal their joints with backing rod and a flexible product.
Brickwork movement joints
Vertical joints in long brick walls let the brickwork expand without cracking. They’re resealed over backing rod with a low-modulus sealant in a colour to suit the brick.
Questions from North Warnborough
Will you come out to North Warnborough?
Yes, smaller places are covered as well as towns. We work across London and the South East. Just mention lanes, gates or anything else about the route when you book.
I let a flat near Hook station. Can you help?
Yes. We work for landlords and agents as well as homeowners. Just phone 0345 464 0079 or email us with the address and what needs doing, and we’ll give you a clear price.
Is there a guarantee?
Yes, always. There’s a 12-month guarantee on every job, large or small.
Do you work for hotels and businesses?
Yes. We can plan bigger jobs in stages to suit the site.
Is there any odour?
Sometimes, a little. It fades as the sealant cures.
How do I get a quote for external mastic in North Warnborough?
Size, access and the old material all affect the cost. Call for a quick quote.
How long should I leave it?
That depends on the sealant used, so follow the cure time we give you.
Why do you put foam in the joint first?
Backing rod controls the sealant depth and keeps it off the back of the joint. Then the sealant bonds to two faces and can move.
DIY sealant or a professional job?
The difference is mostly in the preparation and the product. Joints are cleaned back to sound surfaces and dried, and the sealant is chosen for how the joint moves and where it is, and the work is guaranteed for a year.
If you’ve already had a go yourself, that’s fine. We remove it and do the joint properly.
Signs you need external mastic in North Warnborough
Some movement joints have been pointed up with mortar, often by someone who didn’t know what it was for. With the joint locked solid, the movement turns into cracks elsewhere in the wall.
The problems people generally mention when they call are:
- Movement joints with cracked, split or missing sealant
- Joints pointed up with cement by mistake
- Old sealant gone brittle and cracked
- Panel joints letting water in
For landlords with property near Hook station, outside joints that have cracked can let damp into a rental, so check them between lets.
What to look for in a quote
- The length of the guarantee
- Whether they seal over old material or remove it
- What product goes in the joint
- Whether they’re fully insured
Nearby places to North Warnborough
What else we do in North Warnborough
How to look after the new joints
Simple care keeps the joints in good condition. We recommend:
- Make sure movement joints aren’t pointed over
- Have failed joints looked at early
- Tell anyone working on the walls about the movement joints
- Check the sealant is paintable before painting near it
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.
Once a joint can’t move, the wall finds another way, often as cracks near the joint. Catch it early and you reduce the risk.