West Sussex · England
Earnley External Mastic
External mastic in Earnley from a team with over 20 years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Sealant pulling away from one side of the joint
- Hard, crazed mastic that has stopped moving
- Plants rooting in failed movement joints
External mastic for homes and businesses in Earnley
As ARBOMaster approved applicators, we choose exterior sealants to suit the joint and the surfaces. Porous or awkward surfaces are primed where the sealant needs it, and we don’t skip that step. We work on façade panels, brickwork movement joints and render & cladding joints, and people most often call us about rigid filler in a joint that should flex and failed sealant between panels on a façade.
Outside joints can only be sealed when they’re dry, so work in Earnley is booked around the forecast. Let us know about access to every wall, plus any garages or outbuildings.
All our work comes with our 12-month guarantee.
- Place
- Earnley (PO20)
- Region
- West Sussex
- Guarantee
- 12 months on all our work
- Price
- A clear quote up front
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
How the visit works
We keep the work tidy and contained to the joints we’re treating. Expect the work to take anything from a few hours to several days, depending on the building, and we tell you how long to leave it before we go. Somewhere as small as Earnley, access is often the only tricky part. For outside work, also let us know about exposed walls and any outbuildings involved.
- First, the joints are inspected and the access agreed.
- 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.
- We fit closed-cell backing rod to control the depth.
- The exterior sealant is applied, tooled and checked along its length.
Getting ready for the visit
- Plan for the work area to be out of bounds to pets and children
- Tell us if parking is tricky
- Where the joints are inside, avoid wetting them before we arrive
How to get a quote
Want a quote for external mastic? Please phone 0345 464 0079 or email us with a few details. You’ll know what we plan to do, and what it will cost, before any work begins.
Advice
Your questions about external mastic in Earnley
Is external mastic in a coastal place like Earnley any different?
Near the coast, wind-driven rain and, nearer the shore, salt air make outside sealant work harder. The right product, a clean joint and the right depth all help it cope.
Is Earnley within the area you cover?
Yes, Earnley is covered. We work across London and the South East, from towns to the smallest places. Longer journeys are simply planned in advance.
What sealant 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, and we will tell you what we’re using.
I’m a tenant. Can you help?
Yes. Ask your landlord first, and we can send them the quote if that helps.
Will you leave a mess?
Very little: the area around the joints is protected first, and we clear up the old sealant and our materials before we leave.
How do you reach high-level joints?
That depends on how high the joints are and the ground below. Low-level joints are straightforward; for higher ones, send details and we will confirm the access.
Do you use backing rod?
Backing rod controls the sealant depth and keeps it off the back of the joint. Then the sealant bonds to two faces and can move.
Do you remove the old sealant?
Yes. We cut out all the old sealant and clean the joint before applying anything new.
Walls and rooflines in Earnley
Earnley is within about 2 miles of the coast, where wind-driven rain is a fact of life and, nearer the shore, so is salt air. Both are hard on movement joints and outside wall joints, which can dry out and crack sooner where a building faces the weather. 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 Earnley Church, an extension built onto an older house moves differently, and the joint between them takes the strain.
Earnley is about 3 miles north-west of Selsey, in West Sussex. If you need external mastic in Earnley, it’s easy to get a quote: please ring 0345 464 0079 or drop us an email. We cover West Sussex from our Crawley base. We cover 371 towns and villages across West Sussex, from the larger towns to small villages. We also work in Portsmouth, around 11 miles away.
Postcode districts we cover here for external mastic: PO20. That includes homes and businesses on Earnley Manor Close, Bookers Lane and Drove Lane and the roads around them. Neighbouring places we cover for external mastic include East Wittering (1 mile west), Almodington (1 mile north-east), Somerley (1 mile north), Shipton Green (2 miles north) and Birdham (2 miles north). Further out, we also cover Bognor Regis (7 miles east), Chichester (6 miles north-east), Selsey (3 miles south-east), Littlehampton (14 miles east), Emsworth (7 miles north-west) and Rustington (15 miles east).
Landmarks near Earnley
A little further out are Selsey Lifeboat Museum (3.9 miles south-east). Green spaces nearby include Pilsey Island.
Keeping the joints in good condition
Simple care keeps the joints in good condition. We recommend:
- Fix overflowing gutters above sealed joints
- Check the sealant is paintable before painting near it
- Wash walls gently around the sealant
- Check external joints each spring
Don’t paint over the new sealant unless we’ve said the product is paintable. Many exterior sealants are not designed to be painted.
Leave a failed movement joint and water keeps getting into the wall. That can lead to damp patches, staining and frost damage.
How the job changes by surface
Concrete and blockwork
Big joints in concrete need careful depth control. Backing rod sized to the joint sets it so the sealant isn’t too deep.
Copings and trims
A failed coping joint lets water into the top of the wall. Resealing them is a small job that protects a lot.
Leave it or put it right?
The longer a joint stays open, the more water the wall takes in. In cold weather, frost can damage wet brick and render, so the problem grows beyond the joint itself. Around Earnley, older homes often have timber in their floors and frames, and water through a failed joint can rot timber if it’s left.
Homes and businesses are quoted the same way: how much there is to do, how we reach it and what it needs. Call for a quick quote and we will go through it with you.
Why Earnley customers choose us
- Neat joints and a tidy finish
- Any old sealant cut out fully, not covered over
- Homes, businesses and hotels
- Full insurance on every job
Take a look at our cost guide and customer reviews.
Do you need external mastic in Earnley?
Using the wrong sealant is another common reason. A high-modulus or general-purpose sealant can be too rigid for a busy joint, so it pulls away from the edges.
The problems people normally mention when they call are:
- Leaking joints around cladding and façade panels
- Joints pointed up with cement by mistake
- Sealant pulling away from one side of the joint
- Weeds or debris growing in open joints
Schools such as East Wittering Community Primary School are buildings too, and larger buildings have long runs of movement joint that eventually need resealing.
What to look for in a quote
- How hidden problems are handled
- Whether all the old sealant comes out first
- How long the guarantee is
- Whether they’re fully insured
Nearby places to Earnley
What else we do in Earnley
Landlord and commercial work in Earnley
If you manage several properties in or around Earnley, jobs at different addresses can go on one quote. Send us the addresses and the work at each.
We also work for property managers and facilities teams. Several sites can be quoted together.
Can I do it myself?
If you’ve already had a go yourself, that is fine. We remove it and do the joint properly.
If you are set on DIY, put the effort into preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it fails, we can still redo it.