Hampshire · England
External Mastic in Boyatt Wood
Sealing brickwork movement joints, render, cladding and façade joints for homes and businesses in Boyatt Wood and across Hampshire. ARBOMaster approved applicators, fully insured, with a 12-month guarantee.
- Plants rooting in failed movement joints
- Water getting into walls through failed joints
- Sealant pulling away from one side of the joint
External mastic in Boyatt Wood, done properly
A movement joint is only as good as its depth. Closed-cell backing rod sets the depth and stops the sealant sticking to the back, leaving it bonded to two faces so it can move with the wall. If you’re dealing with failed sealant between panels on a façade and movement joints with cracked, split or missing sealant, we can put it right, on render & cladding joints, concrete & block and copings & trims alike.
Houses in smaller places like Boyatt Wood can stand more in the open than those in a built-up town, so exposed walls and rooflines take more wind-driven rain. Joints on those sides are usually the first to go.
Every job comes with our 12-month guarantee, wherever you are in Hampshire.
- Where
- Boyatt Wood (SO50, SO53)
- Region
- Hampshire
- Guarantee
- A year, on every job
- Quote
- A clear price before we start
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
When to call us in Boyatt Wood
Joints sealed without backing rod, or far too deep, rarely last. If the sealant sticks to the back as well as the sides, it can’t stretch and rips as the joint opens.
Most people get in touch after spotting something like this:
- Cracked joints where brick meets render or frames
- Failed sealant between panels on a façade
- Movement joints filled with mortar instead of sealant
- Hard, crazed mastic that has stopped moving
Letting a property close to Eastleigh station? Then outside joints that have cracked can let damp into a rental, so check them between lets.
Questions to ask before booking
- Whether VAT is included
- Which sealant they’ll use, and why
- Whether all the old sealant comes out first
- What happens if the job turns out different
Towns and villages near Boyatt Wood
Also in Boyatt Wood
Questions from Boyatt Wood
Do you cover smaller places like Boyatt Wood?
Yes. Boyatt Wood is within the area we cover, which takes in towns, villages and rural addresses. Our work covers London and the South East. Just mention lanes, gates or anything else about the route when you book.
Can you help a landlord with a rental near Eastleigh station?
Yes. We work for letting agents and landlords as well as homeowners. You can ring 0345 464 0079 or send us an email with the details for a clear quote.
Do you work at height?
Each building is different. Tell us the height, the number of joints and what’s below them and we’ll confirm how they can be reached safely.
Can you seal joints between two different materials?
Yes. Materials like render, brick, metal and uPVC all move differently, so a flexible sealant is needed where they meet. We choose one that suits both surfaces.
Is there a guarantee?
Yes, for a year. If anything isn’t right with the work within the year, let us know and we’ll sort it.
Does someone need to be in?
Access is agreed with you when the job is booked. For inside work, that normally means someone being in.
Do you remove the old sealant?
Yes, always, and completely. New silicone doesn’t stick to old silicone, so any old material comes out before anything new goes in.
Do you work for hotels and businesses?
Yes. We’ve worked for hotels, offices and other businesses and we’re fully insured.
Why act early in Boyatt Wood
It often makes sense to reseal all the failing joints on an elevation together. They’ve weathered the same way and it means sorting access once. In an older home around Boyatt Wood, damp from a failed joint can get into timber and plaster, and that’s a much bigger job than renewing the sealant.
Leaving a failed joint normally makes the job bigger, not smaller, as water and mould keep getting in. If you’re not sure whether it needs doing, call 0345 464 0079 or send us an email and we’ll give you an honest view and a quote.
Why choose Mr Mastic in Boyatt Wood
- Every job guaranteed for a year
- We never seal over old sealant
- Over 20 years’ experience
- We agree the colour with you first
What sealant work cannot fix
Some problems need a builder, plumber or other trade rather than us:
- Rising or penetrating damp from elsewhere in the wall
- Structural movement, which needs a surveyor or engineer
- Cracks in the bricks or render themselves, away from the joints
Not sure which it is? You can phone 0345 464 0079 or send us an email and we will tell you honestly.
Where we work in Boyatt Wood
- Concrete & block
- Brickwork movement joints
- Render & cladding joints
- Joints between brick and frames
- Copings & trims
- Façade panels
External mastic in Boyatt Wood: local notes
London and the South East are among the drier parts 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 South Stoneham House (about 3.1 miles south) nearby, there’s older building stock in the area around Boyatt Wood as well as newer homes. Where a home is older, older walls and rooflines need a sealant that moves with them and suits the material.
Schools such as Crestwood Community School are buildings too, and its movement joints, gutters and trims need looking after like any other building’s. Homes close to St. Peter's Church include some older properties, and the joints between older walls, newer extensions and the roofline need a sealant that can move.
Boyatt Wood is about 1 mile north-west of Eastleigh, in Hampshire. Boyatt Wood gets the same service as everywhere we cover: old sealant removed completely, careful preparation and a 12-month guarantee. Boyatt Wood is one of 683 places in Hampshire where we work for external mastic.
Here we cover the SO50 and SO53 postcode area for external mastic. We cover properties on Lawn Road, Arthur Road and Darwin Road. We also cover the places around Boyatt Wood: Allbrook (1 mile north), Eastleigh (1 mile south-east), Chandler's Ford (1 mile west), Highbridge (1 mile north-east) and Lord's Wood (1 mile east). Within a short drive, we also cover Winchester (6 miles north), Gosport (15 miles south-east), Fareham (11 miles south-east), Totton (8 miles south-west), Hedge End (5 miles south-east) and Romsey (5 miles west).
Local landmarks in Boyatt Wood
We work in homes and buildings around Shakespeare Junior School, Thornden School and Lakeside Country Park, among other places. The nearest railway station is Eastleigh station, about 0.9 miles south-east. Other landmarks nearby include Eastleigh Museum (0.9 miles south) and Moorgreen Hospital (3.9 miles south-east). Not far away are Flexford Nature Reserve.
Can I do it myself?
What a professional job adds is preparation and the right 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 are set on DIY, put the effort into preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it doesn’t work out, we can still put it right.
What affects the cost of external mastic
Every job gets its own quote. This is what makes a difference:
- How many rooms, windows or areas are involved
- The number and length of the joints
- The old material and how stubborn it is
- Access and height
The cost depends on the size of the job, how much old material has to come out and access to the work. You will have a clear quote before any work starts.
What we need to know
The more you tell us, the more accurate the quote. When you ask for a quote, tell us:
- If it’s domestic, commercial or a hotel
- Any previous sealing or DIY work
- Access, such as stairs, a lift or height
- Pictures of the joints, sent by email
We do not publish a price list. Instead, we give you a clear quote for your job. To get started, ring 0345 464 0079 or email us.
How the job changes by surface
Joints between dissimilar materials
Different materials may need different primers. We prepare both faces so the sealant bonds properly.
Brickwork movement joints
Brick movement joints are often mistaken for a missing mortar line. Where one has been mortared, we cut it out and reseal it with sealant if the joint can be cleared.
How the visit works
There’s no need to move everything out, just the space around the work. We protect the rest, and the work takes a few hours for a handful of joints, longer for a whole elevation in most cases. For a job in Boyatt Wood, we agree the time, the access and parking before the day. Outdoor jobs depend on a dry day, since sealant needs a dry surface.
- 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.
- We gun in low-modulus sealant and tool it neatly.
Getting ready for the visit
- Where the joints are inside, avoid wetting them before we arrive
- Clear items away from the joints we are working on
- Mention if the joints have been sealed before
Getting a quote
If you’re in Boyatt Wood and need external mastic, ring 0345 464 0079 or drop us an email. A short description of the job and where it is helps us quote, and we will agree the price before any work begins.