Hampshire · England
Plaitford Green External Mastic
Sealing brickwork movement joints, render, cladding and façade joints for homes and businesses in Plaitford Green and across Hampshire. Fully insured, ARBOMaster approved and guaranteed for a year.
- Sealant pulling away from one side of the joint
- Leaking joints around cladding and façade panels
- Gaps where render, brick and frames meet
Should I try it myself first?
Sealing over old silicone is the commonest DIY error. New silicone will not bond to old, so it lifts and traps water and mould underneath. All the old material has to come out first.
If you do try it yourself, take your time over the preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it does not work out, we can still put it right.
External mastic in Plaitford Green
As ARBOMaster approved applicators, we choose exterior sealants to suit the joint and the surfaces. Some surfaces need a primer before sealing. We are often asked to deal with old sealant gone brittle and cracked and weeds or debris growing in open joints, on brickwork movement joints, copings & trims and render & cladding joints.
Older homes in small places like Plaitford Green may be stone, brick or timber-framed, often with later extensions. The joints where those materials meet are the weak points.
Every job comes with a one-year guarantee.
- Where
- Plaitford Green (SO51)
- Region
- Hampshire
- Cover
- A year, on every job
- Price
- A clear quote up front
- Call
- 0345 464 0079
- Updated
- 26 October 2026
Questions from Plaitford Green
I let a flat near Mottisfont & Dunbridge station. Can you help?
Yes. We work for landlords and agents as well as homeowners. Just phone 0345 464 0079 or send us an email with the address and what needs doing, and we will give you a clear quote.
Is Plaitford Green within the area you cover?
Yes, Plaitford Green is covered. We work across London and the South East, and smaller places are part of that. The journey is planned ahead, so it helps to know about access.
How do you reach high-level joints?
It depends on the building. Tell us the height, the number of joints and what’s below them and we will confirm how they can be reached safely.
Do you use backing rod?
The foam is closed-cell backing rod. It stops the sealant going in too deep and bonding to three sides.
How long does external mastic take?
Most jobs take anything from a few hours to several days, depending on the building. We will confirm how long when we quote.
Do you seal joints where cladding meets other materials?
Yes. Materials like render, brick, metal and uPVC all move differently, so the joint between them must be flexible. We choose one that suits both surfaces.
Can I do it myself?
That depends on the joint. Work at height, movement joints, fire-rated gaps and large areas are best left to a professional, while a short indoor joint may be within reach.
Can you quote for more than one area?
Of course. Combining jobs makes good use of the visit, so mention them when you ask for a quote.
The process
At the end, we look at the finished work together and tell you how long to leave it. The work normally takes anything from a few hours to several days, depending on the building, depending on how much there is to do. In a small place like Plaitford Green, access is generally the main thing to plan. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- We start by walking round the building and agreeing the joints and the access.
- 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.
- We fit closed-cell backing rod to control the depth.
- The exterior sealant is applied, tooled and checked along its length.
How to prepare
- Clear items away from the joints we’re working on
- Keep pets and children clear of the area while we work
- Let us know about parking restrictions
Get a quote
For external mastic in Plaitford Green, phone 0345 464 0079 or drop us an email. A short description of the job and where it is helps us quote, and you’ll get a clear quote before any work starts.
Read more
How we quote for external mastic
There’s no set price list. What we look at:
- How much there is to do
- Mould in or behind the old joints
- How many areas need sealing
- The type of sealant required
Instead of a standard rate, we price the job in front of us: the amount of work, the old material and the access. You’ll know the price before we begin.
Helping us quote
To make quoting easier, let us know:
- Whether it has been sealed before
- The type of property
- The rough size of the job
- What the problem is, such as mould, gaps, leaks or cracking
There’s no standard price list. Instead, we give you a clear price for your job. To arrange one, call 0345 464 0079 or email us.
Aftercare tips
To keep the joints looking good and working properly:
- Look over the joints every year, ideally after winter
- Act on the first splits you see
- Ask before painting over external sealant
- Keep soil, plants and ivy away from the joints
Only paint over the joint if we’ve confirmed the sealant can take paint. 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. Early work is quicker and leaves a better finish.
When something else is needed
Honest advice matters more to us than a booking, so here’s what sealant cannot fix:
- Walls that need new movement joints cut into them
- Subsidence or other structural problems
- Damp from another source, such as a leaking gutter or a bridged damp-proof course
If in doubt, phone 0345 464 0079 or email us and we will say what we think.
What we seal
- Joints between brick and frames
- Brickwork movement joints
- Copings & trims
- Façade panels
- Render & cladding joints
- Concrete & block
External mastic in Plaitford Green: local notes
London and the South East are among the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day. With historic houses such as Landford Manor (about 1.7 miles south-west) nearby, there’s older building stock in the area around Plaitford Green as well as newer homes. Where a home is older, older brick and stone need a sealant that suits them, at the right joint depth.
If you live in an older home near Church of St Leonard, older walls, gutters and the joints where extensions meet them need a flexible sealant.
Plaitford Green is about 5 miles west of Romsey, in Hampshire. Jobs in Plaitford Green get the same care as everywhere else we work: the old material taken out, joints prepared properly and a 12-month guarantee. Plaitford Green is one of 683 towns and villages in Hampshire where we work for external mastic. Our Southampton page covers work nearby, about 10 miles away.
All of SO51 is within our area for external mastic. Local streets include Wellow Wood Road and Sherfield English Lane, all of which we cover. Neighbouring places we cover for external mastic include West Wellow (1 mile south), The Frenches (2 miles east), Shootash (2 miles east), Canada (2 miles south) and East Wellow (2 miles south-east). Larger places within reach include Winchester (13 miles east), Eastleigh (11 miles east), Totton (6 miles south-east), Chandler's Ford (9 miles east), Hedge End (14 miles south-east) and Romsey (5 miles east).
Local landmarks in Plaitford Green
For rail, the closest station is Mottisfont & Dunbridge station, about 3.5 miles north-east of the centre. Nearby you will also find Romsey Community Hospital (4.9 miles east). Open spaces near Plaitford Green include Copythorne Common.
What happens if it’s left?
Water gets in through a failed movement joint. Resealing early keeps the job to the joint itself, instead of the wall and finishes around it. Older cottages and farmhouses around Plaitford Green can have timber floors and frames, and water through a failed joint can rot timber if it’s left.
No two jobs are quite the same, so we quote each one individually. Size, access and the product the joint needs all make a difference, and we’ll explain the quote if you ask.
Why book with us
- 12-month guarantee on every job
- White, clear, grey or another colour, product permitting
- Experience in homes, commercial sites and hotels
- Anti-fungal sanitary silicone in wet areas
Read our cost guide or what customers say.
Common problems we fix in Plaitford Green
UV, rain and frost all age exterior sealant. In time it goes hard, crazes on the surface and stops stretching, so the joint eventually tears or comes away from one side.
If you can see any of these, it’s time to have the joints looked at:
- Sealant that has lost its bond to the brick or render
- Rigid filler in a joint that should flex
- Moss and dirt in joints with no sealant left
- Leaking joints around cladding and façade panels
Letting a property close to Mottisfont & Dunbridge station? Then outside joints that have cracked can let damp into a rental, so check them between lets.
What your quote should include
- When the joint can take water or movement
- What insurance they hold
- Is VAT in the price?
- How much experience the applicator has