Bracknell Forest · England
External Mastic in Forest Park
Sealing brickwork movement joints, render, cladding and façade joints for Forest Park, backed by a 12-month guarantee. Ask us for a quote.
- Weeds or debris growing in open joints
- Weathered mastic that no longer stretches
- Gaps where render, brick and frames meet
What affects the cost of external mastic
Some jobs are bigger than they look, and some smaller. The main factors:
- Mould in or behind the old joints
- How much there is to do
- The number of rooms or windows
- When we can work, for business premises
Doing several joints on one visit usually makes better use of the time than several visits. We’ll give you a clear price for the lot.
What to tell us for a quote
What to tell us when you ask for a quote:
- Roughly how big the job is
- Any previous sealing or DIY work
- The address or postcode of the job
- The type of property
Quotes start with a quick conversation. Tell us what’s wrong, where it is and how much there is, and we will explain how we’d tackle it. Whenever you’re ready, ring 0345 464 0079 or send us an email.
How we handle external mastic in Forest Park
We are ARBOMaster approved applicators, and each external joint gets a sealant suited to it. Some surfaces need a primer before sealing. We’re often asked to deal with joints with sealant missing in places and moss and dirt in joints with no sealant left, on concrete & block, brickwork movement joints and joints between brick and frames.
In and around Forest Park, older properties sit alongside newer ones, each with its own outside joints. Older gutters and trims need their joints resealed; newer brick and render need their movement joints kept sound.
Each job carries a 12-month guarantee, whatever its size.
- Where
- Forest Park (RG12)
- Region
- Bracknell Forest
- Cover
- One year on every job
- Quotes
- A clear price before work begins
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
Common questions in Forest Park
Can you help a landlord with a rental near Martins Heron station?
Yes, landlords and agents are among the people we work for, and several properties can be quoted together. You can phone 0345 464 0079 or send us an email with the details for a clear quote.
Do you cover smaller places like Forest Park?
Yes, smaller places are covered as well as towns. Our work covers London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
What do you put in the joint?
Each joint gets the product that suits it. Movement, water and weather all affect the choice, and we’ll explain our choice.
How often do external joints need resealing?
There’s no fixed answer: joints on exposed walls or with a lot of movement age sooner. A yearly look will tell you when they need doing. Every job carries our one-year guarantee.
Why do you put foam in the joint first?
The foam is closed-cell backing rod. It keeps the sealant at the right depth and bonded to the sides only so it can flex with the joint.
How do I get a quote for external mastic in Forest Park?
We don’t publish prices, because the cost depends on the job: how much there is, what’s there now, how we reach it and what it needs. You’ll get a clear quote before work begins.
Do you take out the old sealant first?
Yes, every time. New silicone doesn’t stick to old silicone, so any old material comes out before anything new goes in.
Can you match the colour of my brickwork?
We aim for a joint that suits the wall rather than one that jumps out. We will talk through colour options before we start from the range available.
Leave it or put it right?
A properly done movement joint is an even line in a colour that suits the wall. A hurried job with smeared edges and no backing looks worse and fails sooner. In a smaller place like Forest Park, wherever a wall is exposed, a failed outside joint is a real source of damp. Inside, a split seal lets water into floors and panels just as it would anywhere.
There are no prices on our website, because each job is priced on what it involves. Call for a quick quote and we’ll talk you through it.
Why us?
- Neat joints and a tidy finish
- An ARBOMaster approved applicator
- Homes, businesses and hotels
- Sealant colour chosen to suit
Take a look at what affects the cost or customer reviews.
Should I try it myself first?
The biggest DIY mistake is sealing over old sealant. New silicone won’t bond to old, so it peels away and traps moisture behind it. Everything old must be removed first.
A careful DIYer can reseal a simple joint, like a short, easy-to-reach joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
Do you need external mastic in Forest Park?
Many joints fail because they were sealed too deep or with nothing behind them. Sealant bonded to three sides has nowhere to go and tears as soon as the joint widens.
It’s worth asking for a quote if you see:
- Brick movement joints where the sealant has split
- Sealant pulling away from one side of the joint
- Joints pointed up with cement by mistake
- Failed seals between different materials
For an older house near a landmark such as St Paul, an extension built onto an older house moves differently, and the joint between them takes the strain.
Before you book anyone
- How long the guarantee is
- What insurance they hold
- Whether VAT is included
- What happens if they find a problem under the old sealant
What external mastic looks like in Forest Park
London and the South East are among the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast. Bracknell, which Forest Park is part of, is one of England’s post-war new towns. Many homes date from the post-war decades and were built in phases, so neighbouring houses often have rooflines and wall joints of the same age, wearing out at the same time.
Managing a site like Harmans Water Primary School? Then larger buildings have long runs of movement joint that eventually need resealing. For landlords with property near Martins Heron station, failed wall and movement joints let damp in, so they’re worth checking between tenancies.
Forest Park is about 1 mile south-east of Bracknell, in Bracknell Forest. If you need external mastic in Forest Park, it’s easy to get a quote: please ring 0345 464 0079 or send us an email. We cover Bracknell Forest from our Crawley base, Forest Park included. Our Bracknell Forest coverage runs to 41 places, Forest Park among them. You can also see our page for Reading, about 11 miles away.
Every address in RG12 is covered for external mastic. We cover properties on Bog Lane, Bere Road and The Square. Other places close to Forest Park include The Warren (1 mile north-east), Jennett's Park (1 mile north), Martins Heron (1 mile north), Harmans Water (1 mile west) and Bullbrook (1 mile north). We also work in nearby towns such as Sandhurst (4 miles south-west), Binfield (3 miles north-west), Temple Park (3 miles north-west), Popeswood (3 miles north-west), College Town (5 miles south-west) and Farley Wood (3 miles north-west). Being one of Bracknell Forest’s larger places, Forest Park has homes, rented property and businesses of every kind.
Around Forest Park
Typical jobs here are in homes near Ranelagh School and The Brakenhale School. Forest Park has its own railway station: Martins Heron station. Nearby you’ll also find Heatherwood Hospital (1.8 miles east) and The Lexicon (1.5 miles north-west). Open spaces near Forest Park include Heath Lake and Wildmoor Heath.
Aftercare tips
Good habits help new joints last longer. Our tips:
- Keep soil, plants and ivy away from the joints
- Keep movement joints as flexible joints, not mortar
- Fix overflowing gutters above sealed joints
- Walk round the building once a year and look at the joints
Look over the joints once a year, ideally after winter. Splits, gaps at the edges or plants in the joint are early warning signs.
Leaks behind façade panels and render often go unseen. When it finally shows inside, the joint may have been open for years so early resealing is worth it.
Places near Forest Park
Other services in Forest Park
How it works
A visit follows a simple pattern: we look at the joints together, protect the area around them, carry out the job and clear up. It generally takes anything from a few hours to several days, depending on the building. For a job in Forest Park, we agree the time, the access and parking before the day. If the work is outside, the weather plays a part, as sealant needs a dry surface.
- We look at every joint and agree a colour to suit the wall.
- Failed sealant is removed back to clean, sound faces.
- Backing rod goes in so the sealant can stretch between the two faces.
- 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
- Mention any sign-in or site rules at work premises
- Let us know about parking restrictions
- Tell us about any previous sealing or DIY attempts
Ask for a quote
Getting a quote is simple: let us know what needs doing and where, and roughly how big it is. A few photos by email make the job easier to understand.
Read more
Landlords, agents and businesses in Forest Park
For anyone letting property in or around Forest Park, jobs at different addresses can go on one quote. Just tell us the addresses and what each one needs.
Letting agents often deal with us directly. Send the address, what’s needed and the access arrangements and we’ll quote.