Greater London · England
External Mastic in Parsons Green
Sealing brickwork movement joints, render, cladding and façade joints for homeowners, landlords and businesses in Parsons Green. Fully insured, ARBOMaster approved and guaranteed for a year.
- Plants rooting in failed movement joints
- Leaking joints around cladding and façade panels
- Weathered mastic that no longer stretches
Work for landlords, hotels and businesses
Letting agents and landlords in Parsons Green can book us as well as homeowners. Resealing between tenancies keeps a property looking cared for.
If you manage several properties in or around Parsons Green, jobs at different addresses can go on one quote. Just tell us the addresses and what each one needs.
How we handle external mastic in Parsons Green
We cut out failed sealant, set the joint depth with closed-cell backing rod and reseal with a low-modulus exterior sealant. The colour is chosen to suit the brick or render so the joint does not stand out. We work on joints between brick and frames, brickwork movement joints and concrete & block, and people most often call us about cracked joints where brick meets render or frames and water getting into walls through failed joints.
Working on the outside of a London home means planning access: shared paths, upper floors and parking. For a home in Parsons Green, tell us how high the joints are and how to reach the back of the building.
Our work is backed for twelve months, and the guarantee is the same wherever you are.
- Place
- Parsons Green (SW6, SW10)
- Wider area
- Greater London
- Cover
- 12 months on all our work
- Price
- A clear quote up front
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
Signs you need external mastic in Parsons Green
Sometimes a movement joint was filled with mortar or a rigid filler, often by someone who didn’t know what it was for. The joint cannot move, so the wall cracks somewhere else instead.
The most common problems we see are:
- Moss and dirt in joints with no sealant left
- Water getting into walls through failed joints
- Rigid filler in a joint that should flex
- Weathered mastic that no longer stretches
For an older house near a landmark such as St Dionis, the joints between older walls, newer extensions and the roofline need a sealant that can move.
What your quote should include
- How much experience the applicator has
- What happens if they find a problem under the old sealant
- Is VAT in the price?
- What the cure time is
Towns and villages near Parsons Green
More services for Parsons Green
DIY versus a professional finish
Sealing over old silicone is the commonest DIY error. New silicone will not bond to old, so it peels away and traps moisture behind it. All the old material has to come out first.
Some sealant jobs are within reach of a careful DIYer, such as a straightforward joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
What external mastic looks like in Parsons Green
In terraces and conversions, gutters and walls are often shared with the neighbours, so it’s worth agreeing who is responsible before work starts. With historic houses such as Fulham Palace (about 0.8 miles west) nearby, there’s older building stock in the area around Parsons Green 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.
Managing a site like Lady Margaret School? Then larger buildings have long runs of movement joint that eventually need resealing. Parsons Green is in London, so parking needs planning: let us know about parking bays, permits or a driveway.
Parsons Green is about 2 miles south of Kensington, in Greater London. From the centre of Parsons Green to the outskirts, external mastic is available for homes and businesses alike, from flats and houses to offices and hotels. Our Greater London coverage runs to 764 places, Parsons Green among them.
Work in SW6 and SW10 works the same way as everywhere else we cover. We cover properties on Buer Road, Vera Road and Ewald Road. Being close to the A304, Parsons Green is easy for our applicators to reach. Neighbouring places we cover for external mastic include Hurlingham (1 mile south), Walham Green (1 mile north-east), Chelsea Harbour (1 mile east), Sands End (1 mile east) and West Brompton (1 mile north). Within a short drive, we also cover London (5 miles east), City of Westminster (3 miles north-east), Marylebone (4 miles north-east), St Pancras (5 miles north-east), Shoreditch (6 miles north-east) and Walthamstow (11 miles north-east).
Around Parsons Green
Typical jobs here are in homes near Natural History Museum Library and Archives, Parsons Green (park) and The White Horse pub, among other places. Other local landmarks include Holy Cross RC School (under half a mile north) and Queensmill School (under half a mile south-east). Parsons Green’s nearest station is Imperial Wharf station, about 0.7 miles east. A little further out are Baynard's Castle (5 miles north-east) and Western Hospital (0.8 miles north). Not far away are WWT London Wetland Centre and Campden Hill.
What affects the quote in Parsons Green
For a quick quote, just ask. The main things that affect it are:
- How many rooms, windows or areas are involved
- Whether old sealant or filler has to be cut out
- Mould in or behind the old joints
- How much there is to do
The cost reflects the work involved, not guesswork. That is why we ask about the job first and agree the price before starting.
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:
- The type of property
- Photos by email, if that’s easy
- Any previous sealing or DIY work
- What the problem is, such as mould, gaps, leaks or cracking
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, and we will take it from there.
Your questions about external mastic in Parsons Green
Is parking an issue for external mastic in Parsons Green?
In much of London, parking needs planning: a visitor permit or a bay close to the door helps a lot.
Can you help a landlord with a rental near Imperial Wharf station?
Yes, rental work is part of what we do. You can call 0345 464 0079 or send us an email with the address and a few details, and we will give you a fixed price before any work starts.
Can you quote for more than one area?
Yes, and it often makes sense. Doing several areas at once is usually more efficient.
Will you leave a mess?
No. We work neatly, protect the area around the joints and tidy up afterwards.
Should I try DIY first?
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.
Does someone need to be in?
It depends on the job. For work indoors, someone needs to let us in, and for outside work we’ll agree access with you when we book.
Do you seal joints where cladding meets other materials?
Yes. Materials like render, brick, metal and uPVC all move differently, so a flexible sealant is needed where they meet. The sealant is matched to both sides.
Where is Mr Mastic based?
We work from Crawley. We cover Parsons Green and the rest of Greater London.
Keeping the joints in good condition
Simple care keeps the joints in good condition. We recommend:
- Keep high-pressure jets off the joints
- Check external joints each spring
- Clear growth from the base of walls and joints
- Check the sealant is paintable before painting near it
Have a quick look at the joints each spring. Splits, gaps at the edges or plants in the joint are early warning signs.
Once a joint cannot move, the wall finds another way, generally as cracking in the brickwork or render nearby. Resealing it early helps prevent that.
When something else is needed
To be straight with you, there are a few things sealant will not fix:
- Structural movement, which needs a surveyor or engineer
- Failed render or damaged cladding panels
- Rising or penetrating damp from elsewhere in the wall
If you are not sure, just call 0345 464 0079 or send us an email and we’ll give you a straight answer before booking.
What we seal
- Joints between brick and frames
- Brickwork movement joints
- Concrete & block
- Façade panels
- Render & cladding joints
- Copings & trims
How the visit works
There’s no need to move everything out before we come, only the area right around the joints. We protect the rest, and the job takes a few hours to a few days, depending on the length of joint and the access for a typical job. In Parsons Green, as in most of London, parking needs a little planning. A visitor permit or a nearby bay makes the visit run more smoothly.
- We inspect the joints and agree which need resealing and how they’ll be reached.
- We cut out the failed sealant and rake out any dirt or growth.
- The joint faces are cleaned and primed where the sealant needs it.
- Closed-cell backing rod is fitted to set the depth and stop three-sided bonding.
- A flexible exterior sealant is applied and tooled in a colour to suit the wall.
Before we arrive
- Let us know about earlier repairs to the joints
- Mention any sign-in or site rules at work premises
- Keep pets and children clear of the area while we work
Ask for a quote
To get a quote, call 0345 464 0079 or email us with the location and a short description of the problem. You will have a clear quote before work begins.