Kent · England
External & façade joints in Northwood, Kent
Sealing brickwork movement joints, render, cladding and façade joints for Northwood, backed by a one-year guarantee. Call for a quick quote.
- Old sealant gone brittle and cracked
- Plants rooting in failed movement joints
- Gaps where render, brick and frames meet
How we handle external mastic in Northwood
Many failed façade joints only get noticed once there’s a stain or a damp patch inside. We inspect them, agree which need doing and reseal with a weatherproof, flexible sealant. If you have rigid filler in a joint that should flex and joints where the bead has come unstuck, we can help, on copings & trims, concrete & block and façade panels alike.
In a smaller place like Northwood, some homes face open ground, and walls and rooflines facing the weather take the worst of it. That is where gutter joints and wall joints tend to fail first.
Big or small, you get the same one-year guarantee.
- Place
- Northwood (CT12, CT10, CT11)
- Wider area
- Kent
- Guarantee
- One year on every job
- Quote
- A clear quote up front
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
Leave it or put it right?
Sealing over the top of old mastic doesn’t hold for long. The new layer can’t bond properly to old, weathered material, so we always take the old sealant out. In an older home around Northwood, damp from a failed joint can get into timber and plaster, and that is a much bigger job than renewing the sealant.
We don’t show prices on the website, because the cost depends so much on the job itself. Call for a quick quote.
What you get with us
- Experience in homes, commercial sites and hotels
- An ARBOMaster approved applicator
- Arbo and Everbuild products
- White, clear, grey or another colour, product permitting
Read our cost guide or our reviews.
Honest limits
It helps to know what we can’t do:
- Rising or penetrating damp from elsewhere in the wall
- Failed render or damaged cladding panels
- Movement that is more than a sealant joint can take
If you are not sure, just ring 0345 464 0079 or send us an email and we’ll give you a straight answer before you book.
What we seal
- Copings & trims
- Render & cladding joints
- Concrete & block
- Façade panels
- Brickwork movement joints
- Joints between brick and frames
Common questions in Northwood
Do you work for landlords with property near Ramsgate station?
Yes, rental work is part of what we do. You can phone 0345 464 0079 or drop us an email with the address and a few details, and we’ll give you a fixed price before we start.
Is Northwood within the area you cover?
Yes, we do. Our work covers London and the South East, and smaller places are part of that. The journey is planned ahead, so it helps to know about access.
Do you work for hotels and businesses?
Yes. Commercial and hotel work is a large part of what we do, as well as homes. Working times can be discussed when we quote.
Why is there a gap in my brick wall?
It’s a deliberate gap that lets the wall expand and contract without cracking. It’s sealed with a flexible sealant, not mortar.
Why do you put foam in the joint first?
We fit closed-cell backing rod wherever the joint depth needs controlling. It sets the sealant depth and prevents three-sided bonding, so the joint can move.
What colours does the sealant come in?
There’s a good range of exterior colours, including greys, browns, whites and stone tones. We choose the closest to your brick or render.
How do you reach high-level joints?
It depends on the height and the site. Low-level joints are straightforward; for higher work, tell us about the building and we’ll confirm what’s needed.
Is it worth trying it myself?
For a simple, easy-to-reach joint, a careful DIYer can do a reasonable job. Most DIY failures come from sealing over old material, wet joints or too much sealant.
The process
You do not need to clear the whole room or building, just the space around the work. We protect the rest, and the work takes a few hours to a few days, depending on the length of joint and the access for a typical job. For a job in Northwood, we agree the time, the access and parking before the day. Outdoor jobs depend on a dry day, since sealant needs a dry surface.
- Each joint is checked and the colour of the new sealant agreed.
- Failed sealant is removed back to clean, sound faces.
- Closed-cell backing rod is pushed in so the sealant bonds to two sides only.
- Primer is applied wherever the sealant needs it.
- A low-modulus exterior sealant is gunned in and tooled to a neat finish.
Before we arrive
- Let us know if you’ve seen damp or leaks
- Let us know about parking restrictions
- Clear the area around the work
How to get a quote
If you are in Northwood and need external mastic, call 0345 464 0079 or email us. A short description of the job and where it is helps us quote, and you will get a clear quote before any work starts.
Related advice
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.
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.
What affects the cost of external mastic
The quote reflects the job in front of us. We look at:
- The number of rooms or windows
- How easy the joints are to reach
- Any mould that needs treating
- When we can work, for business premises
Commercial jobs are quoted on the same basis as homes: how much there is to do, how we reach it and what it needs, plus any working-time requirements on site. Ask us for a quote and we’ll explain what it covers.
What we need to know
What to tell us when you ask for a quote:
- Pictures of the joints, sent by email
- Where the job is, and your postcode
- The rough size of the job
- What the problem is, such as mould, gaps, leaks or cracking
For a quick quote, get us on the phone, or email us if that’s easier. Tell us about the joints that need doing and we’ll talk you through the work.
Surface by surface
Render joints
Render has movement joints and stop beads that need sealing. We reseal them with a flexible exterior sealant that suits the render colour.
Joints between dissimilar materials
Where a frame or panel meets masonry, water often finds a way in. The old joint is removed and a sealant that bonds to both sides goes in.
What we are called out for in Northwood
Using the wrong sealant is another common reason. A stiff, general-purpose sealant can’t cope with a joint that moves a lot, so it pulls away from the edges.
Any of these means the joints need attention:
- Sealant that has lost its bond to the brick or render
- Movement joints with cracked, split or missing sealant
- Rain getting behind render or cladding at a joint
- Old sealant gone brittle and cracked
Schools such as Dame Janet Primary Academy are buildings too, and larger buildings have long runs of movement joint that eventually need resealing.
What to look for in a quote
- What the quote includes, VAT included or not
- What happens if the job turns out different
- Whether they seal over old material or remove it
- Who turns up on the day
Also near Northwood
Also in Northwood
What external mastic looks like in Northwood
Northwood is close to the coast, where wind-driven rain is a fact of life and, nearer the shore, so is salt air. That is hard on movement joints and outside wall joints, especially on the side facing the sea. Historic houses like Quex Park (about 3.6 miles west) are a reminder that the area around Northwood has older buildings as well as new. In older buildings, older walls and rooflines need a sealant that moves with them and suits the material.
Homes close to St Mark's Church include some older properties, and the joints between older walls, newer extensions and the roofline need a sealant that can move. Rented homes near Ramsgate station change hands often, and split movement joints are easy to miss on a rental until damp shows inside.
Northwood is about 1 mile north-west of Ramsgate, in Kent. We carry out external mastic for householders, landlords and businesses in Northwood. Northwood is one of 922 places in Kent where we work. There’s also a page for Chelmsford, about 48 miles away.
Our applicators cover all of CT12, CT10 and CT11 for external mastic and the streets around it. Local streets include Gwyn Road, Coxes Lane and Roman Road, and we cover them all. With the A254 and A256 close by, Northwood is simple for us to get to. Other places close to Northwood include Ramsgate (1 mile south-east), Upton (1 mile east), St Lawrence (1 mile south), St Peter's (1 mile north-east) and Broadstairs (1 mile north-east). We also work in nearby towns such as Canterbury (15 miles west), Dover (15 miles south), Deal (9 miles south), Herne Bay (12 miles west), Walmer (10 miles south) and Wincheap (15 miles west).
Landmarks near Northwood
We work in homes and buildings around The Derby Arms, The Charles Dickens School and The Royal Harbour Academy. Northwood’s nearest station is Ramsgate station, roughly 0.8 miles south of the centre. A little further out are Westwood Cross (0.5 miles north-west) and Ramsgate Museum (1.4 miles south-east). Not far away are Sandwich and Pegwell Bay.