Hampshire · England
Lyndhurst External Mastic
External mastic across Lyndhurst and nearby, with old sealant always removed completely and a one-year guarantee.
- Cracked joints where brick meets render or frames
- Joints where the bead has come unstuck
- Moss and dirt in joints with no sealant left
How we handle external mastic in Lyndhurst
As ARBOMaster approved applicators, we choose exterior sealants to suit the joint and the surfaces. Porous or awkward surfaces are primed where the sealant needs it, and we don’t skip that step. If you’re dealing with joints where the bead has come unstuck and gaps where render, brick and frames meet, we can put it right.
Homes around Lyndhurst range from older cottages to newer houses, with walls and rooflines of every type. Older homes need their gutter and trim joints kept tight, newer ones their movement joints.
Our work is backed for twelve months, in Lyndhurst and everywhere else we cover.
- Place
- Lyndhurst (SO43)
- Region
- Hampshire
- Guarantee
- 12 months on all our work
- Quote
- A clear price before work begins
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
Should I try it myself first?
A DIY attempt does not rule out a professional job. We cut it out and start again, so tell us about it when you ask for a quote.
Not every job suits DIY: high-level joints, fire-rated gaps, external movement joints and big jobs call for the right materials, safe access and experience.
Signs you need external mastic in Lyndhurst
Some movement joints have been pointed up with mortar. With the joint locked solid, the movement turns into cracks elsewhere in the wall.
Most people get in touch after spotting one of these:
- Rigid filler in a joint that should flex
- Moss and dirt in joints with no sealant left
- Sealant that has lost its bond to the brick or render
- Panel joints letting water in
Letting a property close to Ashurst New Forest station? Then split movement joints are easy to miss on a rental until damp shows inside.
What your quote should include
- How long to leave it before use
- Is VAT in the price?
- How the joint is cleaned and prepared
- What happens if the job turns out different
How the job changes by surface
Render joints
Render has movement joints and stop beads that need sealing. We reseal them with a flexible exterior sealant that suits the render colour.
Concrete and blockwork
Wide joints in concrete need the depth controlling carefully. We size the backing rod to the gap and keep the sealant to the right depth.
Quotes for external mastic in Lyndhurst
Every job gets its own quote. This is what makes a difference:
- Any working-time requirements on site
- The product the joint needs
- The size of the job
- Mould in or behind the old joints
Instead of a standard rate, we price the job in front of us: how many joints, what’s in them now and how we reach them. The price is agreed before we begin.
What to tell us for a quote
A few details help us give you an accurate quote. When you ask for a quote, tell us:
- Where the job is, and your postcode
- Whether it’s a home or a business
- If someone has resealed it before
- Access, such as stairs, a lift or height
Asking for a quote is easy: let us know the job and the location. Photos by email help us understand the job, and we will take it from there.
The process
The work is kept neat and contained to the joints we’re treating, so you can get on with your day. Expect the work to take a few hours for a handful of joints, longer for a whole elevation, and we tell you how long to leave it before we go. Parking around Lyndhurst is normally easier than in a town centre, but mention any lanes, gates or long drives. For outside work, side access and the height of the joints help us plan.
- 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.
- We apply the sealant, tool it and check the whole run.
How to prepare
- For business premises, tell us about site rules or sign-in
- For indoor joints, keep the area dry beforehand if you can
- Let us know about stairs, lifts or work at height
Get a quote
Call for a quick quote, or email us if that is easier. Describe what needs sealing and we will explain what’s involved.
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Common questions in Lyndhurst
Can you help a landlord with a rental near Ashurst New Forest station?
Yes, rental work is part of what we do. Just call 0345 464 0079 or email us and tell us about the property, and we’ll send you a clear quote.
Will you come out to Lyndhurst?
Yes. Lyndhurst 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.
Can you do several jobs on one visit?
Of course. Combining jobs makes good use of the visit, so mention them when you ask for a quote.
Will the old sealant be removed?
Yes. All of the old material is cut out and the joint cleaned before resealing.
Do I need to be at home?
We need access to the joints, so we will agree that with you when we book. Indoors, that normally means someone at home.
Do you work for hotels and businesses?
Yes. We work in offices, washrooms, hotels and other commercial premises, as well as homes. We can talk about working times when we quote.
Do you use backing rod?
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.
How long will you be here?
A typical job takes a few hours for a handful of joints, longer for a whole elevation, including the preparation. We will confirm how long when we quote.
When it is not the sealant
We’d rather tell you now than do work that won’t last, so these are the limits:
- Subsidence or other structural problems
- Damp that isn’t coming from the joint
- Cracking across the wall rather than at a joint
If you are not sure, just phone 0345 464 0079 or email us and we will give you a straight answer.
Joints and surfaces we work on
- Copings & trims
- Render & cladding joints
- Concrete & block
- Façade panels
- Joints between brick and frames
- Brickwork movement joints
Lyndhurst buildings and the weather
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.
If you look after a building such as St Michael and All Angels CofE Infant School, larger buildings have long runs of movement joint that eventually need resealing. For an older house near a landmark such as Church of Our Lady and St Edward, older walls, gutters and the joints where extensions meet them need a flexible sealant.
Lyndhurst is about 4 miles south-west of Totton, in Hampshire. Jobs in Lyndhurst get the same care as everywhere else we work: old sealant removed completely, careful preparation and a one-year guarantee. Our Hampshire coverage runs to 683 places, and Lyndhurst is one of them. Southampton is on our list too, around 9 miles away.
Every address in SO43 is covered for external mastic, from the main roads to the quietest streets. That includes homes and businesses on High Street, King's Close and Empress Road. Other places close to Lyndhurst include Emery Down (1 mile west), Ashurst (3 miles north-east), Balmerlawn (3 miles south), Colbury (4 miles north-east) and Brockenhurst (4 miles south). We also work in nearby towns such as Eastleigh (12 miles north-east), Totton (4 miles north-east), Chandler's Ford (11 miles north-east), Hedge End (12 miles east), Lymington (8 miles south) and Romsey (9 miles north-east).
Around Lyndhurst
We work in homes and buildings around Fox And Hounds Public House. The closest station to Lyndhurst is Ashurst New Forest station, about 2.4 miles north-east. Other landmarks nearby include Ashurst Hospital (2.6 miles north-east) and National Dairy Museum (3.4 miles north-east). For a walk, there’s Copythorne Common.
Landlord and commercial work in Lyndhurst
We regularly work with letting and managing agents. Tell us the address, the job and how access works.
We also work for property managers and facilities teams in Lyndhurst and across Hampshire. We can quote a run of properties together.