Kent · England
St Peter's External Mastic
Specialist external mastic for St Peter's: careful preparation, the right product and tidy work. Call for a quick quote.
- Water getting into walls through failed joints
- Weathered mastic that no longer stretches
- Joints where the bead has come unstuck
Common questions in St Peter's
Do you cover smaller places like St Peter's?
Yes, we do. 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.
I let a flat near Broadstairs station. Can you help?
Yes, rental work is part of what we do. You can ring 0345 464 0079 or send us an email with the address and a few details, and we’ll give you a fixed price before work begins.
Can I add another job to the visit?
Yes, we can. More than one area can go on one quote.
Where do you work from?
Our base is in Crawley, West Sussex, and we cover South East England, London and all of Scotland.
Can you work on commercial sites?
Yes. We work in offices, washrooms, hotels and other commercial premises. Working times can be discussed when we quote.
Why do you put foam in the joint first?
Backing rod controls the sealant depth and keeps it off the back of the joint. That way it bonds to the two sides only and can stretch.
Can a movement joint be filled with mortar?
No. Rigid materials cannot move with the wall. Where a joint has been mortared, it can often be raked out and sealed properly.
Will there be a smell?
It depends on the product. Some smell for a while, some hardly at all.
How we handle external mastic in St Peter's
Failed sealant is cut out, the depth set with closed-cell backing rod, and the joint resealed with a low-modulus sealant made for outside. We pick a colour that sits well with the wall so the line blends in. If you have sealant that has lost its bond to the brick or render and rigid filler in a joint that should flex, we can help, on façade panels, joints between brick and frames and render & cladding joints alike.
Around St Peter's, garages, outbuildings and extensions all add to the joints on the outside of a home. Leaks usually start at a gutter end, a garage door frame or where an extension meets the house.
Each job carries a 12-month guarantee, large or small.
- Place
- St Peter's (CT10)
- Region
- Kent
- Guarantee
- 12 months on all our work
- Price
- Quoted before any work starts
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
Walls and rooflines in St Peter's
St Peter's is within about 1 mile of the coast, and homes near the sea take more wind-driven rain, with salt in the air closer to the shore. That is hard on movement joints and outside wall joints, especially on the side facing the sea. Rainfall in the South East is lower than in much of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
In the older streets around Parish Church of St Peter the Apostle, the joints between older walls, newer extensions and the roofline need a sealant that can move. For site and facilities teams at buildings such as Dane Court Grammar School, movement joints, cladding joints and gutters on larger buildings need the same care as a house’s.
St Peter's is about 1 mile north-west of Broadstairs, in Kent. We carry out external mastic for homes and businesses in St Peter's and the surrounding area, as part of our work across Kent. Our Kent coverage runs to 922 places, and St Peter's is one of them. For nearby work, see our Chelmsford page (48 miles or so).
Here we cover the CT10 postcode area for external mastic. Streets in the area include Upton Road, Green Lane and Speke Road, all of which we cover. Main roads around St Peter's include the A255. We also cover Broadstairs (1 mile south-east), Upton (1 mile south-east), Northwood (1 mile south-west), Northdown (1 mile north) and Kingsgate (2 miles north-east). Within a short drive, we also cover Deal (10 miles south), Herne Bay (12 miles west), Walmer (11 miles south), Whitfield (15 miles south), Sandwich (7 miles south-west) and Aylesham (13 miles south-west).
Local landmarks in St Peter's
Typical jobs here are in homes near Red Lion pub, Callis Grange Nursery and Infant School and The Charles Dickens School, among other places. The nearest railway station is Broadstairs station, roughly 0.7 miles south-east of the centre. Other landmarks nearby include Crampton Tower (0.7 miles south-east) and Queen Elizabeth the Queen Mother Hospital (1.5 miles north-west). Not far away are Sandwich and Pegwell Bay.
How to look after the new joints
Joint life depends on how it’s used and looked after. Here’s what we suggest:
- Keep soil, plants and ivy away from the joints
- Avoid pressure-washing directly into sealant joints
- Ask before painting over external sealant
- Make sure movement joints aren’t pointed over
If you have more work done on the wall, such as new render, cladding or an opening, show the contractor the movement joints. They must stay as flexible joints, never rendered or pointed over.
Once a joint can’t move, the wall finds another way, often as cracks near the joint. Catch it early and you reduce the risk.
DIY sealant or a professional job?
Not every job suits DIY: work at height, external movement joints, fire-rated sealant and large areas need the right product, the right access and the right method.
Overfilling a joint is a classic DIY mistake. A heavy bead looks messy and copes badly with movement, and getting the depth right matters as much as the look.
What sealant work can’t fix
It helps to know what we can’t do:
- Loose or hollow render, which needs re-rendering
- Cutting new joints into brickwork, which is building work rather than sealant work
- Structural movement, which needs a surveyor or engineer
If you’re not sure, just call 0345 464 0079 or drop us an email and we will give you a straight answer before you book.
Where we work in St Peter's
- Concrete & block
- Copings & trims
- Brickwork movement joints
- Render & cladding joints
- Joints between brick and frames
- Façade panels
Leave it or put it right?
A failed movement joint lets water into the wall, behind render and cladding. Dealing with it early keeps the repair to the joint, rather than the wall around it. In an older home around St Peter's, damp from a failed joint can get into timber and plaster, which is far harder to put right than the sealant itself.
A failed joint rarely gets cheaper to fix by waiting, as water and mould keep getting in. If you are unsure, call 0345 464 0079 or email us for an honest opinion and a quote.
Why book with us
- Quality sealants from Arbo and Everbuild
- 180+ five-star Google reviews
- ARBOMaster approved applicator
- Old sealant always removed completely
Take a look at our cost guide or our reviews.
How we quote for external mastic
For a quick quote, just ask. The main things that affect it are:
- Mould in or behind the old joints
- How many rooms, windows or areas are involved
- Whether old sealant or filler has to be cut out
- When we can work, for business premises
What it costs depends on the amount of work, how hard the old material is to remove and how easy the joints are to reach. You’ll have a clear quote before any work starts, so you know where you stand.
What to tell us for a quote
To help us quote quickly, please include:
- How we’d reach the joints
- Photos by email, if that’s easy
- The problem you’ve noticed
- If it’s domestic, commercial or a hotel
Call for a quick quote, or send an email if you’d rather. Tell us about the joints that need doing and we will explain what’s involved before giving you a price.
Nearby places to St Peter's
Other services in St Peter's
How it works
A visit follows a simple pattern: we check the joints, protect the area around them, carry out the job and clear up. It usually takes a few hours to a few days, depending on the length of joint and the access. Parking around St Peter's is usually 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.
- 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.
- 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.
Before we arrive
- Let us know about parking restrictions
- Tell us about any previous sealing or DIY attempts
- Mention any leaks or damp you’ve noticed
How to get a quote
To get a quote, phone 0345 464 0079 or send us an email with the location and a short description of the problem. We will send you a clear quote before any work starts.
Advice
Signs you need external mastic in St Peter's
Joints sealed without backing rod, or far too deep, rarely last. If the sealant sticks to the back as well as the sides, it can’t stretch and rips as the joint opens.
The most common problems we see are:
- Hard, crazed mastic that has stopped moving
- Damp patches traced to an open external joint
- Sealant pulling away from one side of the joint
- Gaps where render, brick and frames meet
Rented homes near Broadstairs station change hands often, and failed wall and movement joints let damp in, so they’re worth checking between tenancies.
Comparing quotes
- Is the old sealant removed completely?
- How the surfaces are prepared before sealing
- Who does the work, and how experienced they are
- How long to leave it before use