Greater London · England
External & façade joints in Holloway, Greater London
Movement joints in Holloway need attention? We cut out the old, prepare the joints and apply the right sealant, with a one-year guarantee.
- Joints where the bead has come unstuck
- Leaking joints around cladding and façade panels
- Joints pointed up with cement by mistake
DIY sealant or a professional job?
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.
The biggest DIY mistake is sealing over old sealant. Silicone does not stick to old silicone, so it lifts and traps water and mould underneath. All the old material has to come out first.
How we handle external mastic in Holloway
For buildings in Holloway, we reseal external joints of all kinds, from brick movement joints to cladding panels. The preparation is the same whatever the wall: clean, sound faces and a controlled depth. If you have failed seals between different materials and rigid filler in a joint that should flex, we can help.
In London terraces and converted houses, gutters and walls are often shared with the house next door, so a leaking gutter joint or failed wall joint can affect more than one home. For a flat in Holloway, check the lease for who looks after the outside.
Every job is covered by our 12-month guarantee.
- Where
- Holloway (N7, N19, N4)
- Wider area
- Greater London
- Cover
- 12 months on all our work
- Quote
- Quoted before any work starts
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
Different surfaces, different methods
Cladding and façade panels
Cladding and façade panels are usually separated by sealed joints. Each joint gets a sealant that suits the panel and its movement.
Brickwork movement joints
Vertical joints in long brick walls let the brickwork expand without cracking. We reseal them with a low-modulus sealant over backing rod.
Work for landlords, hotels and businesses
From a single let to a portfolio, the work is the same standard: the old material taken out, careful preparation and a 12-month guarantee.
We also work for businesses, from offices to washrooms and kitchens. On commercial sites, working times can be discussed when we quote.
Common questions in Holloway
Is parking an issue for external mastic in Holloway?
Parking in Holloway, as in most of London, takes a little planning: a visitor permit or a nearby bay makes the day run more smoothly, so mention what’s available when you book.
Can you do external mastic in Holloway?
Yes, Holloway is within the area we cover. We work across London and the South East. Just call 0345 464 0079 or email us with a few details of the job, and we’ll give you a clear quote.
Do you seal joints where cladding meets other materials?
Yes. We cut out the old sealant, prepare both faces and reseal with a flexible exterior product. We pick a colour that works with both materials.
Do the sealants smell?
Some sealants have a smell while they cure. Ventilation helps.
What does external mastic cost?
Every job is different, so each one gets its own quote. For a quick quote, phone 0345 464 0079 or drop us an email and let us know what needs doing and where.
Do you work at height?
It depends on the building. We work on joints that can be reached safely. Tell us about the building and we’ll confirm what access is needed.
How long does the job take?
That depends on the amount of work, but as a guide it takes a few hours for a handful of joints, longer for a whole elevation. We’ll give you a better idea when we quote.
Are you ARBOMaster approved?
Yes. We are an ARBOMaster approved applicator, which is run for the Arbo sealant brand.
The process
When we arrive, we start by going over the job with you, so you know exactly what we are doing. Surfaces next to the work are protected before any work begins. The work usually takes a few hours for a handful of joints, longer for a whole elevation. In a London area like Holloway, the main things to plan are parking and access: let us know about parking, the floor we will be working on and any lift or shared entrance.
- First, the joints are inspected and the access agreed.
- 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.
- We fit closed-cell backing rod to control the depth.
- We apply the sealant, tool it and check the whole run.
Getting ready for the visit
- Move anything stored near the joints
- Keep pets and children clear of the area while we work
- On commercial sites, let us know about site rules
Getting a quote
Call for a quick quote, or send an email if you’d rather. Tell us about the joints that need doing and we will talk you through the work and give you a clear price.
Related advice
What external mastic looks like in Holloway
London terraces and converted houses often share gutters, downpipes and walls, so it’s worth agreeing who is responsible before work starts. Historic houses like Witanhurst (about 1.7 miles north-west) are a reminder that the area around Holloway has older buildings as well as new. In older buildings, older brick and stone need a sealant that suits them, at the right joint depth.
Rented homes near Drayton Park station change hands often, and outside joints that have cracked can let damp into a rental, so check them between lets. Holloway is in London, so parking needs planning: tell us about permits, visitor bays or off-street space when you book.
Holloway is about 2 miles north-west of Hoxton, in Greater London. Every kind of property in Holloway is covered for external mastic. The work is guaranteed for a year. Holloway is one of 764 towns and villages in Greater London where we work for external mastic.
Jobs for external mastic in N7, N19 and N4 is quoted and booked the same way as anywhere else. If you need external mastic at a property on Penn Road, Lough Road and Tabley Road or anywhere close by, we can help. If you are just outside Holloway, we cover Nag's Head (1 mile north), Lower Holloway (1 mile south), Tufnell Park (1 mile west), Upper Holloway (1 mile north-west) and Barnsbury (1 mile south). Larger places within reach include London (4 miles south), City of Westminster (3 miles south-west), Marylebone (3 miles south-west), Kensington (5 miles south-west), Shoreditch (3 miles south-east) and Walthamstow (5 miles north-east).
Local landmarks in Holloway
Around Holloway, our work takes us to homes and buildings near Vaughan Williams Memorial Library, Whittington Park and Beacon High, among other places. You will also find Musical Theatre Academy (0.8 miles south-east) and The Coronet pub (within half a mile south-east). The nearest railway station is Drayton Park station, about 0.6 miles south-east. A little further out are Brunswick Centre (2.3 miles south) and Montfichet's Tower (3.1 miles south). Green spaces nearby include St. James's Park Lake and Dartmouth Park Hill.
Towns and villages near Holloway
More services for Holloway
How we quote for external mastic
The quote reflects the job in front of us. We look at:
- The amount of work
- How easy the joints are to reach
- Any mould that needs treating
- The type of sealant required
Rather than a set price list, we look at what your job involves: how many joints, what’s in them now and how we reach them. You will know the price before we begin.
Asking for a quote
You do not need to know the technical terms. It helps if you can tell us:
- Whether it has been sealed before
- Any access issues, like height or stairs
- Pictures of the joints, sent by email
- The type of property
For a quote, phone 0345 464 0079 or email us with the location and a short description of the problem. We will give you a clear quote before any work starts.
How to look after the new joints
How long the joints last depends on use and care. We suggest:
- Show decorators and builders where the movement joints are
- Act on the first splits you see
- Keep water from gutters off the wall
- Ask before painting over external sealant
Keep pressure washers away from the sealant. High-pressure water can lift the edges.
A joint that has stopped moving pushes the movement elsewhere, usually as cracking in the brickwork or render nearby. Resealing it early helps prevent that.
When to call us in Holloway
Sunlight, wet weather and frost wear exterior sealant down. In time it goes hard, crazes on the surface and stops stretching, so the next time the wall moves, it splits or pulls away.
These are the problems we are asked about most:
- Sealant pulling away from one side of the joint
- Cracked joints where brick meets render or frames
- Weeds or debris growing in open joints
- Damp patches traced to an open external joint
For site and facilities teams at buildings such as Grafton Primary School, its movement joints, gutters and trims need looking after like any other building’s.
What to look for in a quote
- What happens if the job turns out different
- Whether they’re fully insured
- What the quote includes, VAT included or not
- Which colour the sealant will be