West Sussex · England
Alfold Bars External Mastic
External mastic for Alfold Bars and the surrounding area: careful preparation, the right product and tidy work. Call for a quick quote.
- Brick movement joints where the sealant has split
- Gaps where render, brick and frames meet
- Sealant pulling away from one side of the joint
About our external mastic in Alfold Bars
Movement joints let brickwork, render and cladding expand and shrink without cracking. Its sealant has to flex with the building, season after season, so once it splits or hardens, the joint stops working and water gets in. If you have plants rooting in failed movement joints and water getting into walls through failed joints, we can help, whatever the surface.
Around Alfold Bars, older buildings can be stone, brick or timber-framed, many with extensions added later. Where one material meets another is where water generally gets in.
A one-year guarantee comes as standard.
- Where
- Alfold Bars (RH14)
- Wider area
- West Sussex
- Cover
- One year on every job
- Price
- A clear quote up front
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
For landlords and businesses
We work for letting agents and landlords as well as homeowners. Resealing between tenancies is a simple way to keep a property in good order.
We regularly work with letting and managing agents. Send the address, what’s needed and the access arrangements and we will quote.
DIY versus a professional finish
If you’ve already had a go yourself, that’s fine. We remove it and do the joint properly, so tell us about it when you ask for a quote.
Sealing over old silicone is the commonest DIY error. Silicone does not stick to old silicone, so it peels away and traps moisture behind it. Everything old must be removed first.
What happens on the day
There’s no need to move everything out, only the area right around the joints. We protect the rest, and the job takes anything from a few hours to several days, depending on the building for a typical job. In a small place like Alfold Bars, access is usually the main thing to plan. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- First, the joints are inspected and the access agreed.
- We cut out the old mastic and rake out anything in the joint.
- The faces are brushed clean and primed where the product requires it.
- We fit closed-cell backing rod to control 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
- Mention any tricky access
- Tell us about any water getting in
Getting a quote
Asking for a quote is easy: let us know the job and the location and its rough size. A few photos by email make the job easier to understand.
Advice
Surface by surface
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.
Concrete and blockwork
The face of concrete or block is often dusty, so cleaning and priming matter. A primer goes on where the product requires one before the bead.
Your questions about external mastic in Alfold Bars
Is there a guarantee on external mastic in Alfold Bars?
Every job comes with our one-year guarantee, wherever it is. We’re fully insured, and an ARBOMaster approved applicator.
Can you do external mastic in Alfold Bars?
Yes. Our work covers London and the South East, and Alfold Bars is part of that. You can ring 0345 464 0079 or send us an email and let us know what needs doing.
How long will you be here?
A typical job takes anything from a few hours to several days, depending on the building, including the preparation. We’ll confirm how long when we quote.
What colours does the sealant come in?
There’s a good range of exterior colours, including greys, browns, whites and stone tones. We pick the one that suits your wall best.
Can tenants book the work?
We are happy to deal with the tenant, landlord or agent. Just make sure your landlord agrees.
Do you work for letting agents?
Yes, regularly. Several properties can go on one quote, and between tenancies is a good time for the work.
What’s an expansion joint in brickwork?
A movement joint is a planned break in the wall that absorbs expansion and shrinkage. It’s sealed with a flexible sealant, not mortar.
When will the joints need doing again?
That depends on the wall, the weather and the movement. Signs to watch for are cracking, hardening and gaps at the edges.
How we quote for external mastic
Some jobs are bigger than they look, and some smaller. The main factors:
- Mould in or behind the old joints
- The number and length of the joints
- When we can work, for business premises
- Which sealant suits the joint
Every job is a little different, so each one gets its own quote. Size, access and the product the joint needs all play a part.
Helping us quote
The more you tell us, the more accurate the quote. When you get in contact, it helps to mention:
- The rough size of the job
- Where the job is, and your postcode
- The type of property
- What’s wrong with the joints now
Need a quote? Please call 0345 464 0079 or drop us an email and tell us about the job. You’ll know what we plan to do, and what it will cost, before any work begins.
Towns and villages near Alfold Bars
Also in Alfold Bars
Why it’s worth doing now in Alfold Bars
It often makes sense to reseal all the failing joints on an elevation together. They’ve weathered the same way and it means sorting access once. In a small place like Alfold Bars, homes can be exposed to wind and rain, which finds any gap, and damp in older walls is slow to dry out.
Doing several joints on one visit is normally more efficient than separate visits, so tell us about everything that needs sealing. We will give you a clear quote for the lot.
Why us?
- Anti-fungal silicone where joints get wet
- 4.9 on Google from 180+ five-star reviews
- ARBOMaster approved applicator
- Trusted Arbo and Everbuild sealants
Take a look at what affects the cost or our reviews.
What sealant work can’t fix
In fairness, some problems need a different trade:
- Structural movement, which needs a surveyor or engineer
- Cracking across the wall rather than at a joint
- Failed render or damaged cladding panels
If you’re not sure, just call 0345 464 0079 or send us an email and we’ll give you a straight answer.
Where we work in Alfold Bars
- Concrete & block
- Brickwork movement joints
- Façade panels
- Render & cladding joints
- Joints between brick and frames
- Copings & trims
Alfold Bars buildings and the weather
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 St Nicholas, an extension built onto an older house moves differently, and the joint between them takes the strain. If you look after a building such as Loxwood Primary School, its movement joints, gutters and trims need looking after like any other building’s.
Alfold Bars is about 9 miles west of Horsham, in West Sussex. For external mastic in and around Alfold Bars, please call 0345 464 0079 or send us an email for a quick quote. We’re based in Crawley and cover West Sussex, Alfold Bars included. Alfold Bars is one of 371 places in West Sussex where we work. Our Crawley page covers work nearby (14 miles or so).
Work in RH14 is quoted and booked the same way as anywhere else. You’ll find streets such as Pigbush Lane and Oakhurst Lane. We also cover Alfold (1 mile north), Loxwood (1 mile south), Ifold (2 miles south-west), Plaistow (2 miles south-west) and Durfold Wood (3 miles west). Larger places within reach include Crawley (14 miles east), Horsham (9 miles east), Broadfield (14 miles east), Storrington (12 miles south), Billingshurst (6 miles south-east) and Bewbush (13 miles east).
Landmarks near Alfold Bars
Locally, jobs take us to homes and businesses close to The Crown pub and Fir Tree Copse and the streets around them. Green spaces nearby include Shillinglee Lake.