Hampshire · England
Rotherwick External Mastic
External mastic for Rotherwick, by sealant specialists with 20+ years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Rain getting behind render or cladding at a joint
- Joints with sealant missing in places
- Joints pointed up with cement by mistake
External mastic in Rotherwick, done properly
Short cuts in external joints show up within a season or two. Overfilled joints, missing backing rod and sealant laid over old sealant all tend to fail early. We take the old material out and do it properly. If you’re dealing with rigid filler in a joint that should flex and hard, crazed mastic that has stopped moving, we can help.
External sealant needs dry, clean surfaces, so work around Rotherwick is planned for dry weather. Let us know about access to every wall, plus any garages or outbuildings.
We stand behind the work with a 12-month guarantee, so you’re covered after we’ve gone.
- Where
- Rotherwick (RG27)
- Region
- Hampshire
- Guarantee
- One year on every job
- Quotes
- A clear quote up front
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
What sealant work cannot fix
Before you book, it’s worth knowing the limits:
- Cracks in the bricks or render themselves, away from the joints
- Movement that is more than a sealant joint can take
- Loose or hollow render, which needs re-rendering
Not sure which it is? You can ring 0345 464 0079 or email us and we will tell you honestly.
Where we work in Rotherwick
- Copings & trims
- Brickwork movement joints
- Joints between brick and frames
- Façade panels
- Render & cladding joints
- Concrete & block
Walls and rooflines in Rotherwick
London and the South East are among the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast. Historic houses like Stratfield Saye House (about 3.2 miles north) are a reminder that the area around Rotherwick has older buildings as well as new. In older buildings, older walls and rooflines need a sealant that moves with them and suits the material.
For an older house near a landmark such as Rotherwick Church, older walls, gutters and the joints where extensions meet them need a flexible sealant. For site and facilities teams at buildings such as Whitewater Church of England Primary School, movement joints, cladding joints and gutters on larger buildings need the same care as a house’s.
Rotherwick is about 6 miles west of Fleet, in Hampshire. Jobs in Rotherwick get the same care as everywhere else we work: the old material taken out, joints prepared properly and a 12-month guarantee. 683 places in Hampshire are on our list. You can also see our page for Reading, roughly 10 miles from Rotherwick.
All of RG27 is within our area for external mastic, from the main roads to the quietest streets. That includes homes and businesses on The Street, Wedman's Lane and Hook Road and the roads around them. We also cover the places around Rotherwick: Lyde Green (1 mile north-west), Mattingley (1 mile north-east), Hound Green (2 miles north-east), Hazeley (2 miles north-east) and Heckfield (3 miles north). Further out, we also cover Basingstoke (6 miles south-west), Farnborough (9 miles east), Fleet (6 miles east), Aldershot (10 miles south-east), Alton (11 miles south) and Yateley (6 miles east).
Around Rotherwick
Locally, jobs take us to homes and businesses close to Coach And Horses Public House, among other places. For rail, the closest station is Hook station, roughly 1.8 miles south of the centre. A little further out are West Green House Agricultural Museum (1.8 miles east) and Fleet Community Hospital (5.5 miles east). For a walk, there’s Dogmersfield Lake and The Mill Field.
Rotherwick: your questions answered
Can you help a landlord with a rental near Hook station?
Yes, landlords and agents are among the people we work for, and several properties can go on one quote. You can phone 0345 464 0079 or send us an email with the details for a clear quote.
Do you cover smaller places like Rotherwick?
Yes. Rotherwick is within the area we cover, which takes in towns, villages and rural addresses. We work across London and the South East. Just mention lanes, gates or anything else about the route when you book.
How long before the joint can be used?
That depends on the sealant used, so follow the cure time we give you.
What do you put in the joint?
Products from Arbo and Everbuild, among others, chosen to suit the joint. We explain the product when we quote.
Is it worth trying it myself?
That depends on the joint. High-level, external movement and fire-rated joints are professional jobs, while a short indoor joint may be within reach.
Is it OK to fill a movement joint with cement?
No. Rigid materials cannot move with the wall and the joint fails. If it has already been filled, we can generally cut it out and reseal it.
How much does external mastic cost in Rotherwick?
The cost depends on the size of the job, access and how much old sealant has to come out. Call for a quick quote and we will talk you through it.
Can you seal over the old sealant?
No. Fresh sealant does not stick to old sealant, and it traps any mould or water underneath. We remove it all first.
What the job involves on each surface
Concrete and blockwork
Big joints in concrete need careful depth control. We size the backing rod to the gap.
Render joints
Render is weaker at the surface than brick, so a low-modulus sealant is kinder to the joint edges. We prime where the product needs it.
Towns and villages near Rotherwick
Also in Rotherwick
Aftercare tips
After the cure time, these simple habits help:
- Look over the joints every year, ideally after winter
- Keep movement joints as flexible joints, not mortar
- Deal with leaking gutters that soak the joints below
- Have failed joints looked at early
Only paint over the joint if we’ve confirmed the sealant can take paint. Paint can crack on a flexible joint and spoil the finish.
Small splits are the time to act. At that stage it’s a simple cut out and reseal before water has had years to get in.
When to call us in Rotherwick
If plants are growing out of a joint, the sealant has normally failed or was never there. Dirt and roots then trap moisture in the joint and speed up the damage.
Keep an eye out for any of the following:
- Joints with sealant missing in places
- Damp patches traced to an open external joint
- Sealant that has lost its bond to the brick or render
- Gaps where render, brick and frames meet
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
- How much experience the applicator has
- What happens if they find a problem under the old sealant
- How long the guarantee is
- How the surfaces are prepared before sealing
DIY versus a professional finish
A careful DIYer can reseal a simple joint, like a short, easy-to-reach joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
If you’ve already had a go yourself, that is fine. We remove it and do the joint properly, so tell us about it when you ask for a quote.
Why it’s worth doing now in Rotherwick
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. Where a wall is exposed, as many are in small places like Rotherwick, wind-driven rain gets into any failed joint, and older walls, once damp, take a long time to dry.
What you pay reflects the work, not guesswork. That’s why we ask a few questions first.
Why choose Mr Mastic in Rotherwick
- We leave the area clean and tidy
- An ARBOMaster approved applicator
- Fully insured
- More than 20 years in sealant work
Take a look at what affects the cost and customer reviews.
What we do, step by step
Every visit runs the same way: we look at the joints together, protect the area around them, carry out the job and clear up. Most jobs take a few hours for a handful of joints, longer for a whole elevation. Somewhere as small as Rotherwick, access is often the only tricky part. For outside work, also let us know about exposed walls and any outbuildings involved.
- We start by checking each joint, agreeing the ones to redo and how we’ll reach them.
- The old mastic and anything lodged in the joint is removed.
- We clean both faces of the joint and prime them where the product calls for it.
- We push in closed-cell backing rod so the sealant is the right depth and bonds to the sides only.
- We gun in a flexible exterior sealant in a colour that suits the wall and tool it neatly.
Preparing for the visit
- Mention any tricky access
- Clear items away from the joints we’re working on
- Where the joints are inside, avoid wetting them before we arrive
How to get a quote
Asking for a quote is easy: let us know the job and the location, and roughly how big it is. Photos by email help us understand the job.