Kent · England
Grubb Street External Mastic
Sealing brickwork movement joints, render, cladding and façade joints in Grubb Street, with a one-year guarantee on every job. Ask us for a quote.
- Sealant that has lost its bond to the brick or render
- Leaking joints around cladding and façade panels
- Joints with sealant missing in places
Why deal with it now?
Water gets in through a failed movement joint and can run behind render or cladding. Resealing early keeps the job to the joint itself, instead of the wall and finishes around it. Around Grubb Street, older homes often have timber in their floors and frames, and water through a failed joint can rot timber if it’s left.
What it costs depends on the size of the job, how much old material has to come out and access to the work. You will have a clear quote before any work starts.
Why book with us
- A choice of colours where the product allows
- Every job guaranteed for a year
- Anti-fungal sanitary silicone in wet areas
- We leave the area clean and tidy
Read what affects the cost and our reviews.
About our external mastic in Grubb Street
Joints in render and cladding are easy to overlook until a damp patch appears. We look over the joints, agree the ones to renew and reseal with a flexible, weatherproof product. We work on façade panels, render & cladding joints and brickwork movement joints, and common reasons people get in touch are movement joints filled with mortar instead of sealant and failed sealant between panels on a façade.
In a village or hamlet like Grubb Street, older cottages and farm buildings often stand in the open, so walls and rooflines take the full force of wind and rain. Gutter joints and wall joints there need a sealant that can flex and stay put.
The work is covered for a year after we finish. If anything is not right with it, phone 0345 464 0079 or drop us an email.
- Where
- Grubb Street (DA2)
- Wider area
- Kent
- Guarantee
- 12 months on all our work
- Quote
- Quoted before any work starts
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
Places near Grubb Street
More services for Grubb Street
Grubb Street questions
Do you cover Grubb Street for external mastic?
Yes, Grubb Street is within the area we cover. Our work covers London and the South East. You can call 0345 464 0079 or drop us an email and tell us what needs doing, and we will send you a clear quote.
I let a flat near Longfield station. Can you help?
Yes, we work for letting agents and landlords. You can phone 0345 464 0079 or drop us an email with the address and a few details, and we will give you a fixed price before any work starts.
How do I get a quote for external mastic in Grubb Street?
There’s no set price, as it depends on the job: its size, the old material, access and the product needed. We agree the price before any work begins.
Where do you work from?
We’re a Crawley-based firm, with over 20 years’ experience. We work across South East England, London and Scotland.
What do you need from me for a quote?
Just the basics: where it is, what you’ve noticed and how we reach it. Then ring 0345 464 0079 or drop us an email.
What colours does the sealant come in?
We choose a sealant colour to suit the brick, stone or render so the joint blends in. Exterior sealants come in a good range of colours.
Which products do you use?
We choose the sealant for the joint, not the other way round. Where it moves, gets wet or faces the weather makes a difference.
Are you insured?
Yes. We’re fully insured.
DIY sealant or a professional job?
Not every job suits DIY: high-level joints, fire-rated gaps, external movement joints and big jobs need the right product, the right access and the right method.
A careful DIYer can reseal a simple joint, like a short, easy-to-reach joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
How it works
On the day, we start by going over the job with you, so there are no surprises. Surfaces next to the work are protected before work begins. The work normally takes a few hours for a handful of joints, longer for a whole elevation. For a village or hamlet like Grubb Street, the journey is planned in advance: tell us about narrow lanes, gates, long drives and where we can park. We bring what the job needs, so it can be finished in one trip where possible.
- 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.
How to prepare
- Tell us about any previous sealing or DIY attempts
- For business premises, tell us about site rules or sign-in
- Mention any parking rules near the property
How to get a quote
To get a quote, call 0345 464 0079 or email us with the location and a short description of the problem. You’ll have a clear quote before work begins.
Read more
For landlords 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.
Water getting past a failed joint can damage the building, which matters even more when someone else lives there. Resealing at the right time is simple maintenance.
What affects the quote in Grubb Street
Your quote is based on your job. We take into account:
- How many rooms, windows or areas are involved
- The product the joint needs
- Mould in or behind the old joints
- The size of the job
Instead of a standard rate, we look at what your job involves: the amount of work, the old material and the access. The price is agreed before we begin.
What we need to know
To help us quote quickly, let us know:
- What’s wrong with the joints now
- How we’d reach the joints
- Where the property is
- Whether it has been sealed before
It all starts with a short chat. Tell us what’s wrong, where it is and how much there is, and we’ll explain how we’d tackle it. When it suits you, call 0345 464 0079 or drop us an email.
When something else is needed
In fairness, there are a few things sealant won’t fix:
- Damp from another source, such as a leaking gutter or a bridged damp-proof course
- Movement that is more than a sealant joint can take
- Cracks in the bricks or render themselves, away from the joints
If you are not sure, just phone 0345 464 0079 or drop us an email and we will give you a straight answer.
Joints and surfaces we work on
- Brickwork movement joints
- Render & cladding joints
- Copings & trims
- Concrete & block
- Joints between brick and frames
- Façade panels
How to look after the new joints
Aftercare is simple, and it makes a real difference:
- Clear growth from the base of walls and joints
- Deal with leaking gutters that soak the joints below
- Check external joints each spring
- Keep high-pressure jets off the joints
Give the sealant the cure time we tell you before anything rubs against it. The surface skins over quickly, but full cure takes longer.
Water getting behind cladding or render can go unnoticed for a long time. By the time there’s a damp patch, the damage can be well established so early resealing is worth it.
What external mastic looks like in Grubb Street
With historic houses such as Lullingstone Castle (about 5 miles south-west) nearby, there’s older building stock in the area around Grubb Street 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. Rainfall in the South East is lower than in much of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
In the older streets around Church of Saint Mary Magdalene, older walls, gutters and the joints where extensions meet them need a flexible sealant. If you look after a building such as Greenlands Primary School, its movement joints, gutters and trims need looking after like any other building’s. If you let a flat or house near Longfield station, split movement joints are easy to miss on a rental until damp shows inside.
Grubb Street is about 3 miles south-west of Northfleet, in Kent. From the centre of Grubb Street to the outskirts, we cover external mastic for every kind of property. Our area takes in 922 places across Kent. Our London page covers work nearby (17 miles or so).
Here we cover the DA2 postcode area for external mastic. Close by, we work in Green Street Green (1 mile north), Westwood (1 mile north-east), St Margarets (1 mile west), South Darenth (1 mile west) and Bean (1 mile north). Within a short drive, we also cover Maidstone (14 miles south-east), Dartford (4 miles north-west), Sevenoaks (10 miles south-west), Gravesend (5 miles north-east), Tonbridge (14 miles south) and Northfleet (3 miles north-east).
Near you in Grubb Street
In Grubb Street, that means homes and buildings near Longfield Chalk Bank, Railway Tavern and Longfield Academy and the streets around them. The nearest railway station is Longfield station, about 1 mile south-east of the centre. Nearby you’ll also find Stone Castle (2.6 miles north) and Darent Valley Hospital (2.3 miles north-west). Open spaces near Grubb Street include Sawyers Lake.