Surrey · England
External Mastic in Margery
Specialist external mastic for Margery: careful preparation, the right product and tidy work. Ask us for a quick quote.
- Old sealant gone brittle and cracked
- Leaking joints around cladding and façade panels
- Movement joints with cracked, split or missing sealant
External mastic in Margery
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, so it bonds to the two sides only and can stretch. We work on façade panels, render & cladding joints and brickwork movement joints, and the jobs we see most are damp patches traced to an open external joint and brick movement joints where the sealant has split.
Somewhere as small as Margery, homes and farm buildings often face open ground, where walls and rooflines take the weather head on. Joints on those walls need a sealant that moves with the building and stays in place.
Our work is backed for twelve months, and the guarantee is the same wherever you are.
- Location
- Margery (KT20)
- Region
- Surrey
- Cover
- One year on every job
- Price
- A clear quote up front
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
How to look after the new joints
Joint life depends on how it’s used and looked after. We suggest:
- Ask before painting over external sealant
- Keep soil, plants and ivy away from the joints
- Keep water from gutters off the wall
- Point out the joints to other trades
Keep pressure washers away from the sealant. A strong jet can damage the edges of the bead and let water in behind.
Leaks behind façade panels and render often go unseen. By the time there’s a damp patch, the damage can be well established.
When it is not the sealant
A few problems are outside what sealant work can do:
- Adding movement joints to masonry that has none
- Damp that isn’t coming from the joint
- Cracking across the wall rather than at a joint
If you’re not sure, just phone 0345 464 0079 or email us and we’ll give you a straight answer.
Where we work in Margery
- Joints between brick and frames
- Concrete & block
- Façade panels
- Copings & trims
- Brickwork movement joints
- Render & cladding joints
Leave it or put it right?
It often makes sense to reseal all the failing joints on an elevation together. They’ve weathered the same way. In a small place like Margery, homes can be exposed to wind and rain, which finds any gap, and damp in older walls is slow to dry out.
What you pay reflects the work, not guesswork. That’s why we ask a few questions first.
What you get with us
- A 12-month guarantee on all work
- Quality sealants from Arbo and Everbuild
- We agree the colour with you first
- A sealant colour to suit the surroundings
Take a look at how sealant jobs are priced and what customers say.
Also near Margery
What else we do in Margery
Different surfaces, different methods
Copings and trims
Metal and stone copings both move with temperature, so a flexible sealant suits them best year round.
Concrete and blockwork
Big joints in concrete need careful depth control. We size the backing rod to the gap so the sealant isn’t too deep.
What happens on the day
On the day, we look over the joints with you first, so there are no surprises. Surfaces next to the work are protected before we start. Most jobs take a few hours for a handful of joints, longer for a whole elevation. Somewhere as small as Margery, access is often the only tricky part. 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.
- We cut out the old mastic and rake out anything in the joint.
- Joint faces are cleaned back and primed if the sealant needs 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
- Let us know about parking restrictions
- Clear the area around the work
- Let us know about stairs, lifts or work at height
Ask for a quote
Quotes start with a quick conversation. Describe the problem, the location and the size of the job. Whenever you are ready, call 0345 464 0079 or email us.
Read more
Questions from Margery
Can you do external mastic in Margery?
Yes, Margery is within the area we cover. Our work covers London and the South East. You can ring 0345 464 0079 or drop us an email and let us know what needs doing, and we will give you a clear quote.
Do you cover smaller places like Margery?
Yes, Margery is covered. Our work covers London and the South East, and smaller places are part of that. Longer journeys are simply planned in advance.
Where are you based?
Mr Mastic is based in Crawley. Our applicators cover Margery, along with the rest of our area.
What should I tell you?
Tell us what needs doing and where. We’ll ask anything else we need to know.
How long does external mastic last?
That varies with the weather the wall faces, how much it moves and the sealant used. Treat it as a maintenance item and look at it yearly and renew it when it starts to fail.
Do you work at height?
That depends on the building and the joints. We work on joints that can be reached safely. Give us some details and we’ll confirm the access.
Will the old sealant be removed?
Always. Sealing over the old bead is the commonest cause of early failure, so we never do it.
What is a movement joint?
Walls move with heat, cold and moisture, and planned joints take up that movement. It’s closed with backing rod and a flexible sealant.
Signs you need external mastic in Margery
Many joints fail because they were sealed too deep or with nothing behind them. Sealant bonded to three sides has nowhere to go and rips as the joint opens.
If you can see any of these, it’s time to have the joints looked at:
- Joints where the bead has come unstuck
- Rigid filler in a joint that should flex
- Failed seals between different materials
- Moss and dirt in joints with no sealant left
Homes close to Church of Jesus Christ and the Wisdom of God include some older properties, and older walls, gutters and the joints where extensions meet them need a flexible sealant.
Before you book anyone
- What happens if the job turns out different
- Which sealant they’ll use, and why
- Whether they seal over old material or remove it
- How long the guarantee is
What affects the quote in Margery
We don’t publish a price list, because jobs vary so much. What we look at:
- Whether there’s mould to deal with
- Which sealant suits the joint
- Whether old sealant or filler has to be cut out
- When we can work, for business premises
Doing several joints on one visit generally makes better use of the time than several visits, so it’s worth mentioning everything you’d like done. You will get one clear quote for the whole job.
Helping us quote
There’s no need for technical detail. Just tell us:
- The type of property
- Where the property is
- Pictures of the joints, sent by email
- Roughly how big the job is
Getting a quote is simple: let us know what needs doing and where, and roughly how big it is. Photos by email help us understand the job, and we will take it from there.
Margery buildings and the weather
Compared with the north and west, the South East gets less rain, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
Schools such as Kingswood Primary School are buildings too, and larger buildings have long runs of movement joint that eventually need resealing. Letting a property close to Reigate station? Then outside joints that have cracked can let damp into a rental, so check them between lets.
Margery is about 2 miles north of Reigate, in Surrey. From the centre of Margery to the outskirts, we cover external mastic for every kind of property, from flats and houses to offices and hotels. 395 places in Surrey are on our list. Our Crawley page covers work nearby, about 10 miles away.
Work in KT20 is quoted and booked the same way as anywhere else. Whether your property is on Manor Lane, Margery Lane and Mint Lane or anywhere close by, we can help. Neighbouring places we cover for external mastic include Mogador (1 mile west), Lower Kingswood (1 mile north-west), Reigate (2 miles south), Kingswood (2 miles north) and Walton on the Hill (2 miles north-west). Further out, we also cover Epsom (6 miles north-west), Horley (6 miles south), Ewell (7 miles north), Walton-on-Thames (12 miles north-west), Caterham (5 miles east) and Dorking (6 miles west).
Landmarks near Margery
In Margery, that means homes and buildings near Reigate Manor Hotel, Reigate College and Castle Grounds and the streets around them. Margery’s nearest station is Reigate station, about 1.4 miles south of the centre. A little further out are East Surrey Hospital (3.4 miles south-east) and The Belfry (2.1 miles south-east). Open spaces near Margery include Colley Hill and Reigate Heath.