Hampshire · England
External Mastic in Blashford
Specialist external mastic for Blashford: the right sealant, proper preparation and a neat finish. Call for a quick quote.
- Rain getting behind render or cladding at a joint
- Movement joints with cracked, split or missing sealant
- Joints where the bead has come unstuck
External mastic for homes and businesses in Blashford
Joints in render and cladding are easy to overlook until a damp patch appears. We inspect them, agree which need doing and reseal with a weatherproof, flexible sealant in a matching colour. If you have sealant that has lost its bond to the brick or render and water getting into walls through failed joints, we can help, on concrete & block, render & cladding joints and façade panels alike.
Older homes in small places like Blashford may be stone, brick or timber-framed, often with later extensions. Where one material meets another is where water usually gets in.
Every job comes with our one-year guarantee.
- Where
- Blashford (BH24)
- Region
- Hampshire
- Guarantee
- A year, on every job
- Quote
- A clear price before any work starts
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
How to look after the new joints
Once the sealant has cured, a few habits help it last:
- Tell anyone working on the walls about the movement joints
- Ask before painting over external sealant
- Keep high-pressure jets off the joints
- Make sure movement joints are not pointed over
Don’t paint over the new sealant unless we’ve said the product is paintable. Paint can crack on a flexible joint, and paint can crack as the joint moves.
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.
Why act early in Blashford
Mortar or ordinary filler might look like a quick way to close an open joint, but it stops the joint moving. The wall then cracks somewhere else. A flexible sealant over backing rod is what the joint needs. Older cottages and farmhouses around Blashford can have timber floors and frames, and water through a failed joint can rot timber if it’s left.
A failed joint rarely gets cheaper to fix by waiting, as water and mould keep getting in. If you’re unsure, phone 0345 464 0079 or drop us an email and we’ll give you an honest view and a quote.
Why book with us
- One-year guarantee on every job
- Over 20 years’ experience
- Homes, businesses and hotels
- ARBOMaster approved applicator
See what affects the cost or our reviews.
For landlords and businesses
In hotels, rooms out of use cost money, so the work can be planned room by room. Hotel work is part of what we do, alongside homes and businesses.
Letting agents often deal with us directly. Tell us the address, the job and how access works and we will give you a quote.
Different surfaces, different methods
Cladding and façade panels
Panels heat up and cool down quickly, so the joint sealant has to cope with frequent movement. The sealant is chosen with that in mind.
Concrete and blockwork
Concrete and block walls shrink as they dry and move with temperature. Their movement joints are sealed over backing rod with a flexible sealant.
Also in Blashford
What sealant work cannot fix
Before booking, it’s worth knowing the limits too:
- Loose or hollow render, which needs re-rendering
- Cracking across the wall rather than at a joint
- Movement that is more than a sealant joint can take
Not sure which it is? You can ring 0345 464 0079 or email us and we’ll tell you honestly.
What we seal
- Concrete & block
- Joints between brick and frames
- Brickwork movement joints
- Render & cladding joints
- Copings & trims
- Façade panels
Outside joints around Blashford
Historic houses like Avon Tyrrell House (about 4.7 miles south-east) are a reminder that the area around Blashford has older buildings as well as new. In older buildings, older brick and stone need a sealant that suits them, at the right joint depth. 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.
Managing a site like Poulner Junior School? Then larger buildings have long runs of movement joint that eventually need resealing.
Blashford is in Hampshire. Every kind of property in Blashford is covered for external mastic, old or new, large or small. Every job comes with our one-year guarantee. Our Hampshire coverage runs to 683 places, and Blashford is one of them. For nearby work, see our Southampton page, about 17 miles away.
Jobs for external mastic in BH24 works the same way as everywhere else we cover. Local streets include Snails Lane, Ivy Lane and Woolmer Lane. If you are just outside Blashford, we cover Ellingham (1 mile north-west), Rockford (1 mile north-east), Poulner (1 mile south-east), Highwood (1 mile east) and Ringwood (1 mile south). We also work in nearby towns such as Totton (13 miles east), Lymington (13 miles south-east), New Milton (9 miles south-east), Barton on Sea (10 miles south-east), Marchwood (15 miles east) and Ashley (9 miles south-east).
Around Blashford
Around Blashford, our work takes us to homes and buildings near Alice Lisle Inn and Ringwood School Academy and the streets around them. Other landmarks nearby include St Leonard's Hospital (4.5 miles south-west). Not far away are Blashford Lakes and Linbrook Lake.
Common questions in Blashford
Is external mastic in Blashford guaranteed?
Every job comes with our one-year guarantee, wherever it is. We are fully insured, and an ARBOMaster approved applicator.
Will you come out to Blashford?
Yes, Blashford is covered. We work across London and the South East, from towns to the smallest places. The journey is planned ahead, so it helps to know about access.
I rent my home. Can I book you?
Of course. Check with your landlord; we can send the quote to them too.
How much does external mastic cost in Blashford?
Every job is different, so each one gets its own quote. For a quick quote, phone 0345 464 0079 or drop us an email with a short description of the job.
Do I need to be at home?
That depends on where the joints are. For work indoors, someone needs to let us in.
Can you seal joints between two different materials?
Yes. Joints between dissimilar materials are a big part of external work. We use a flexible sealant suited to both surfaces, primed where needed.
Are you fully insured?
Yes. Full insurance covers our work.
How long before the joint can be used?
Cure times vary by product. We tell you how long to leave it before we go.
How it works
We bring everything the job needs with us, so there’s nothing for you to buy. Once we’ve agreed what’s being done, we protect the area and start. It normally takes a few hours for a handful of joints, longer for a whole elevation. Somewhere as small as Blashford, access is often the only tricky part. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- Each joint is checked and the colour of the new sealant agreed.
- We take out the old sealant until the faces are sound.
- Backing rod goes in so the sealant can stretch between the two faces.
- We prime the faces where required.
- A low-modulus exterior sealant is gunned in and tooled to a neat finish.
Preparing for the visit
- Tell us about any previous sealing or DIY attempts
- On commercial sites, let us know about site rules
- Let us know about parking restrictions
Ask for a quote
If you are in Blashford and need external mastic, phone 0345 464 0079 or email us. Tell us what the problem is and where, and we will agree the price before any work begins.
Related advice
Signs you need external mastic in Blashford
UV, rain and frost all age exterior sealant. Over the years it hardens, cracks on the surface and loses its give, so the next time the wall moves, it splits or pulls away.
Signs it’s time to call us include:
- Joints where the bead has come unstuck
- Failed sealant between panels on a façade
- Moss and dirt in joints with no sealant left
- Cracked joints where brick meets render or frames
If you live in an older home near Church of St Mary and All Saints, older walls, gutters and the joints where extensions meet them need a flexible sealant.
Questions to ask before you book
- Who does the work, and how experienced they are
- Whether the sealant suits the joint
- How hidden problems are handled
- How the joint is cleaned and prepared