Surrey · England
Forest Green External Mastic
We cover Forest Green for sealing brickwork movement joints, render, cladding and façade joints. Old material cut out, joints cleaned and sealed neatly.
- Movement joints with cracked, split or missing sealant
- Rigid filler in a joint that should flex
- Panel joints letting water in
Keeping the joints in good condition
After the cure time, these simple habits help:
- Keep movement joints as flexible joints, not mortar
- Tell anyone working on the walls about the movement joints
- Have failed joints looked at early
- Clear growth from the base of walls and joints
Have a quick look at the joints each spring. Watch for splits, edges coming away or growth in the joint.
If you can see gaps, plants or bare sections in a joint, have it checked. Earlier resealing means a smaller job and a better result.
About our external mastic in Forest Green
Ground-floor and low-level joints are straightforward to reach. Where joints are higher up, tell us about the building when you get in touch and we’ll confirm what access is needed. We work on concrete & block, façade panels and joints between brick and frames, and people most often call us about joints pointed up with cement by mistake and failed sealant between panels on a façade.
Somewhere as small as Forest Green, homes and farm buildings often face open ground, so walls and rooflines take the full force of wind and rain. Joints on those walls need a sealant that moves with the building and stays in place.
We stand behind the work with a one-year guarantee, so you are not left on your own once the job is done.
- Location
- Forest Green (RH5)
- Wider area
- Surrey
- Cover
- One year on every job
- Quotes
- A clear price before any work starts
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
When something else is needed
It helps to know what we can’t do:
- Subsidence or other structural problems
- Adding movement joints to masonry that has none
- Loose or hollow render, which needs re-rendering
If you are not sure, just call 0345 464 0079 or send us an email and we’ll give you a straight answer before you book.
Where we work in Forest Green
- Concrete & block
- Brickwork movement joints
- Render & cladding joints
- Copings & trims
- Joints between brick and frames
- Façade panels
Towns and villages near Forest Green
What else we do in Forest Green
Why act early in Forest Green
A failed movement joint lets water into the wall, behind render and cladding. Resealing early keeps the job to the joint itself, instead of the wall and finishes around it. Older cottages and farmhouses around Forest Green can have timber floors and frames, and water through a failed joint can rot timber if it’s left.
The cost depends on the size of the job, how much old material has to come out and how easy the joints are to reach. We give a clear quote before work begins, so you know where you stand.
Why choose Mr Mastic in Forest Green
- Colour picked to suit the job
- Neat joints and a tidy finish
- Fully insured
- Old sealant always removed completely
Take a look at how sealant jobs are priced and what customers say.
Should I try it myself first?
What a professional job adds is preparation and the right product. Joints are cleaned back to sound surfaces and dried, and the sealant is matched to the joint and its conditions.
If you’ve already had a go yourself, that is fine. We remove it and do the joint properly.
How the job changes 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.
Concrete and blockwork
Concrete faces can be dusty and porous, so cleaning and priming matter. A primer goes on where the product requires one.
Forest Green: your questions answered
I let a flat near Ockley station. Can you help?
Yes, landlords and agents are among the people we work for. You can call 0345 464 0079 or drop us an email with the details for a clear quote.
Will you come out to Forest Green?
Yes, Forest Green is covered. We work across London and the South East, from towns to the smallest places. Longer journeys are simply planned in advance.
Will it make a mess?
We keep the work tidy. We protect what’s around the joints, and we clear up when we are done.
Will the new joint stand out?
The aim is a neat, even joint in a colour that suits the wall. We will talk through colour options before work begins from the range available.
What sealant do you use?
The product depends on the job: anti-fungal sanitary silicone in wet areas, and other sealants where joints move or face the weather. Brands we use include Arbo and Everbuild.
How do you reach high-level joints?
That depends on the building and the joints. We work on joints that can be reached safely. Tell us about the building and we will confirm what access is needed.
Can you seal joints between two different materials?
Yes. Materials like render, brick, metal and uPVC all move differently, so a flexible sealant is needed where they meet. The sealant is matched to both sides.
When is the sealant fully cured?
It depends on the product and the conditions. We tell you how long to leave it before we go.
For landlords and businesses
Whether it’s one flat or a portfolio, the work is the same standard: old sealant fully removed, joints prepared properly and a 12-month guarantee.
Failed sealant is one of the commonest items on a check-out report, and it’s quick to put right between tenancies. Several properties can go on one quote.
The process
There’s no need to move everything out, only the area right around the joints. Everything nearby is protected, and the work takes anything from a few hours to several days, depending on the building for a typical job. For a village or hamlet like Forest Green, the journey is planned in advance: let us know about lanes, gates and parking. We bring what the job needs, so it can be finished in one trip where possible.
- First we look over the joints with you, agree which to renew and talk through access.
- The old mastic and anything lodged in the joint is removed.
- The joint faces are cleaned and primed where the sealant needs it.
- We push in closed-cell backing rod so the sealant is the right depth and bonds to the sides only.
- The new sealant, chosen to suit the brick or render, is applied and tooled to a neat finish.
Getting ready for the visit
- Tell us about any water getting in
- Tell us about any previous sealing or DIY attempts
- Mention any tricky access
Getting a quote
Want a quote for external mastic? Please ring 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.
Related advice
Forest Green buildings and the weather
Rainfall in the South East is lower than in much of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
Rented homes near Ockley station change hands often, and failed wall and movement joints let damp in, so they’re worth checking between tenancies. If you live in an older home near Holy Trinity, an extension built onto an older house moves differently, and the joint between them takes the strain.
Forest Green is about 6 miles south-west of Dorking, in Surrey. If you need external mastic in Forest Green, it’s easy to get a quote: please ring 0345 464 0079 or email us. We cover Surrey from our Crawley base, Forest Green included. Forest Green is one of 395 towns and villages in Surrey we cover. For nearby work, see our Crawley page.
Here we cover the RH5 postcode area for external mastic. Whether your property is on Horsham Road and Ockley Road or anywhere close by, we can help. Close by, we work in Ockley (2 miles south-east), Abinger Bottom (2 miles north), Coldharbour (2 miles north-east), Friday Street (3 miles north) and Abinger Common (3 miles north). Larger places within reach include Guildford (10 miles north-west), Woking (13 miles north-west), Epsom (13 miles north-east), Horley (10 miles east), Redhill (11 miles north-east) and Ewell (15 miles north-east).
Near you in Forest Green
Typical jobs here are in homes near The Parrot pub and Wallis Wood, among other places. The closest station to Forest Green is Ockley station, about 2.6 miles east of the centre. Nearby you will also find Abinger Castle (2.9 miles north) and Mesolithic Museum (2.9 miles north). For a walk, there’s Leith Hill and Vann Lake.