West Sussex · England
East Marden External Mastic
Sealing brickwork movement joints, render, cladding and façade joints in East Marden, with a 12-month guarantee on every job. Call for a quick quote.
- Water getting into walls through failed joints
- Hard, crazed mastic that has stopped moving
- Gaps where render, brick and frames meet
Honest limits
Before booking, it’s worth knowing the limits:
- Cutting new joints into brickwork, which is building work rather than sealant work
- Cracking across the wall rather than at a joint
- Structural movement, which needs a surveyor or engineer
If in doubt, call 0345 464 0079 or drop us an email and we’ll say what we think.
Where we work in East Marden
- Joints between brick and frames
- Façade panels
- Render & cladding joints
- Brickwork movement joints
- Concrete & block
- Copings & trims
External mastic for homes and businesses in East Marden
On houses, flats and commercial buildings across East Marden, we reseal joints in brickwork, render, cladding and façade 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 hard, crazed mastic that has stopped moving, we can put it right.
External sealant needs dry, clean surfaces, so work around East Marden is planned for dry weather. Tell us about access to all sides of the building, including outbuildings and garages.
All our work is covered by a one-year guarantee, wherever you are in West Sussex.
- Location
- East Marden (PO18)
- Wider area
- West Sussex
- Guarantee
- 12 months on all our work
- Price
- A clear quote up front
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
How to look after the new joints
A little care helps the new joints last. Our advice:
- Keep high-pressure jets off the joints
- Have failed joints looked at early
- Check external joints each spring
- Make sure movement joints are not pointed over
Give the sealant the cure time we tell you before anything rubs against it. Most exterior sealants skin fast but take longer to cure right through.
Once a joint can’t move, the wall finds another way, often as cracks near the joint. Resealing it early helps prevent that.
What we’re called out for in East Marden
If plants are growing out of a joint, the sealant has generally failed or was never there. Roots and dirt hold water against the wall.
Look out for any of the following:
- Rain getting behind render or cladding at a joint
- Gaps where render, brick and frames meet
- Joints with sealant missing in places
- Sealant pulling away from one side of the joint
In and around East Marden, as anywhere, good external mastic starts with a clean, dry, properly prepared joint.
Before booking anyone
- What the cure time is
- What insurance they hold
- What preparation is included
- How much experience the applicator has
Why deal with it now?
Sealing over the top of old mastic doesn’t hold for long. The new layer cannot bond properly to old, weathered material, so the old joint is cut out fully first. Where a wall is exposed, as many are in small places like East Marden, wind-driven rain gets into any failed joint, and older walls, once damp, take a long time to dry.
We don’t show prices on the website, because the cost depends so much on the job itself. For a quick quote, please ring 0345 464 0079 or send us an email.
What you get with us
- Tidy, careful work
- Anti-fungal silicone where joints get wet
- You choose the colour before work begins
- Colour picked to suit the job
Read how sealant jobs are priced or our reviews.
How it works
Our applicators work methodically: protect, prepare, seal, tidy. Typically it takes anything from a few hours to several days, depending on the building. For a village or hamlet like East Marden, the journey is planned in advance: let us know about lanes, gates and parking. Everything for the job comes with us, so a second trip is avoided 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.
- The faces are brushed clean and primed where the product requires 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
- Mention any parking rules near the property
- Mention any sign-in or site rules at work premises
- Let us know about earlier repairs to the joints
Get a quote
For external mastic in East Marden, ring 0345 464 0079 or send us an email. Tell us what the problem is and where, and we will agree the price before any work begins.
Read more
Nearby places to East Marden
Also in East Marden
What affects the quote in East Marden
There’s no set price list. What we look at:
- The number of rooms or windows
- Any working-time requirements on site
- How easy the joints are to reach
- Whether there’s mould to deal with
Combining jobs into one visit is generally more efficient than separate visits. We will give you a clear quote for the lot.
Helping us quote
Photos help, but a description is a good start. Try to tell us:
- Where the job is, and your postcode
- What the problem is, such as mould, gaps, leaks or cracking
- The rough size of the job
- Pictures of the joints, sent by email
Getting a quote is simple: tell us what needs doing and where. Photos by email help us understand the job.
Your questions about external mastic in East Marden
Can you do external mastic in East Marden?
Yes. We work across London and the South East, and East Marden is part of that. Just ring 0345 464 0079 or email us with a few details of the job, and we will give you a clear price.
Will you come out to East Marden?
Yes, smaller places are covered as well as towns. We work across London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
How long will you be here?
It depends on the size of the job, but as a guide it takes anything from a few hours to several days, depending on the building. We’ll give you a better idea when we quote.
Do the sealants smell?
There can be a smell while the sealant cures. Ventilation helps.
Will the new joint stand out?
There’s a good range of exterior colours, including greys, browns, whites and stone tones. We pick the one that suits your wall best so the joint does not draw the eye.
Can you quote for more than one area?
Yes. More than one area can be quoted together.
Can you work on commercial sites?
Yes. Hotels, offices and other businesses use us and we’re fully insured.
When will the joints need doing again?
That varies with the weather the wall faces, how much it moves and the sealant used. Treat it as a maintenance item and look at it yearly.
East Marden buildings and the weather
London and the South East are among the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day. Historic houses like Uppark (about 2.6 miles north-west) are a reminder that the area around East Marden has older buildings as well as new. Where a home is older, older walls and rooflines need a sealant that moves with them and suits the material.
For an older house near a landmark such as Church of St Peter, the joints between older walls, newer extensions and the roofline need a sealant that can move.
East Marden is about 6 miles north-east of Emsworth, in West Sussex. For external mastic in and around East Marden, please phone 0345 464 0079 or drop us an email for a quick quote. We cover West Sussex from our Crawley base, East Marden included. East Marden is one of 371 towns and villages in West Sussex we cover for external mastic. Our Portsmouth page covers work nearby (13 miles or so).
Our applicators cover all of the PO18 postcode area for external mastic and the streets around it. Other places close to East Marden include Compton (2 miles west), Chilgrove (2 miles east), Didling (3 miles north-east), Elsted (3 miles north) and East Harting (3 miles north). Larger places within reach include Bognor Regis (12 miles south-east), Chichester (7 miles south-east), Selsey (14 miles south), Emsworth (6 miles south-west), Portfield (7 miles south-east) and Yapton (13 miles south-east).
Local landmarks in East Marden
Well-known places in the area include Museum of Gardening (3.6 miles east). For a walk, there’s Bow Hill and Kingley Vale National Nature Reserve.
How the job changes by surface
Render joints
The face of render can be soft, so a low-modulus sealant is kinder to the joint edges. We prime where the product needs it.
Copings and trims
Joints in copings, parapets and trims are exposed to the worst of the weather. Each is resealed with a weatherproof, flexible sealant.