Bracknell Forest · England
Window & door mastic in Forest Park, Bracknell Forest
Problem with your window and door frames in Forest Park? We remove the old material, prepare the joints and seal them properly, with a one-year guarantee.
- Hard, cracked sealant around windows
- Gaps where the sill meets the wall
- Untidy mastic left by window fitters
Window mastic for homes and businesses in Forest Park
The mastic around a window or door seals the gap between the frame and the wall. When it cracks, hardens or pulls away, draughts and rain get in. Our applicators cut it out and replace it with a flexible, weatherproof sealant. If you have sealant in the wrong colour for the frame and rushed sealant from a window installation, we can help.
Many houses in smaller places like Forest Park have conservatories, garden rooms or patio doors. Those joints need the same attention as the main windows.
The work is covered for a year after we finish. If anything is not right with it, call 0345 464 0079 or email us.
- Location
- Forest Park (RG12)
- Wider area
- Bracknell Forest
- Cover
- A year, on every job
- Quotes
- A clear price before work begins
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
How the visit works
Once we’re on site, we check the joints match what you told us. If anything is different, we explain it before carrying on. After that, the work takes a morning for a couple of windows and a door. A visit to Forest Park is planned like any other: the time, the access and where to park are agreed in advance. Outdoor jobs depend on a dry day, since sealant needs a dry surface.
- We check how each frame can be reached safely.
- Old, cracked mastic is removed completely, along with any loose debris.
- Frame and wall are cleaned and must be dry before sealing, and primed where the sealant calls for it.
- Deep voids are backed, then the sealant is gunned in.
- The joint is shaped to shed water and the area tidied.
Before we arrive
- Mention any tricky access
- Tell us if parking is tricky
- Tell us about any water getting in
How to get 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, and we will come back to you with a quote.
Related advice
Why it’s worth doing now in Forest Park
The work is quick compared with the damage it prevents: the visit takes a morning for a couple of windows and a door. Leave it until water is coming in and you may need plastering and decorating as well. Homes in smaller places like Forest Park can face more weather, and failed outside joints let damp into walls. Inside, a split seal lets water into floors and panels just as it would anywhere.
Homes and businesses are quoted the same way: the amount of work, the access and the products needed. Ask us for a quote and we will go through it with you.
Why us?
- A sealant colour to suit the surroundings
- We agree the colour with you first
- Old sealant always removed completely
- 4.9 on Google from 180+ five-star reviews
Read how sealant jobs are priced and our reviews.
Common problems we fix in Forest Park
Plenty of failed mastic was poorly applied in the first place. Mastic laid onto dusty, damp or crumbling surfaces didn’t grip properly, and it lets go sooner than it should.
Keep an eye out for any of the following:
- Draughts coming in around windows and doors
- White mastic on grey or black frames
- Gaps between the frame and the inside reveal
- Cracked sealant at the sill ends
Schools such as Harmans Water Primary School are buildings too, and larger buildings have plenty of frames, and the mastic around each one ages.
Questions to ask before you book
- Are they insured?
- What happens if they find a problem under the old sealant
- Who turns up on the day
- Which colour the sealant will be
When it isn’t the sealant
We will always be straight with you, so here’s what new sealant won’t do:
- Soft or decayed wood in the frame
- A failed sealed unit that has misted up
- A door that needs adjusting, rehanging or new seals
If in doubt, phone 0345 464 0079 or drop us an email and we’ll say what we think before you book.
Joints and surfaces we work on
- uPVC windows
- Aluminium frames
- Patio & French doors
- Window sills
- Composite doors
- Timber windows & doors
Windows and doors in Forest Park
Forest Park is part of Bracknell, one of the post-war new towns. With many homes from the post-war decades, replacement windows and doors are common. The mastic around replacement frames ages too, and gaps at sills and frame heads are where water gets in. Compared with the north and west, the South East gets less rain, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
Letting a property close to Martins Heron station? Then cracked frame mastic tends to show up as a draught or damp complaint, so it’s worth checking between lets. If you live in an older home near St Paul, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
Forest Park is about 1 mile south-east of Bracknell, in Bracknell Forest. Every kind of property in Forest Park is covered for window mastic, old or new, large or small. Every job comes with our 12-month guarantee. Forest Park is one of 41 towns and villages in Bracknell Forest we cover for window mastic. You can also see our page for Reading, about 11 miles away.
Jobs for window mastic in RG12 works the same way as everywhere else we cover. Local streets include Bog Lane, Bere Road and The Square, all of which we cover. We also cover the places around Forest Park: 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). Further out, we also cover 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). Forest Park is among the bigger towns we cover in Bracknell Forest.
What’s near Forest Park
In Forest Park, that means homes and buildings near Ranelagh School and The Brakenhale School. Forest Park has its own railway station: Martins Heron station. A little further out are Heatherwood Hospital (1.8 miles east) and The Lexicon (1.5 miles north-west). For a walk, there’s Heath Lake and Wildmoor Heath.
Landlord and commercial work in Forest Park
Water getting past a failed joint can damage the building, which matters even more when someone else lives there. Resealing at the right time is simple maintenance that we can handle for you.
We also work for businesses, from offices to washrooms and kitchens. On commercial sites, working times can be discussed when we quote.
Different surfaces, different methods
Window sills
Every drop off the glass ends up on the sill, so the sill ends and the joint under the frame are vital. Each is cleaned out and resealed.
uPVC windows
Some uPVC windows were sealed at fitting with a quick bead that never bonded. It comes out, deep gaps get backing rod and the joint is resealed.
Forest Park: your questions answered
Do older homes in Forest Park need their sealant replacing?
If it hasn’t been replaced for some years, it’s usually worth it. Sealant doesn’t last for ever, and its life depends on use, cleaning and weather.
I let a flat near Martins Heron station. Can you help?
Yes, landlords and agents are among the people we work for. Just call 0345 464 0079 or send us an email with the address and what needs doing, and we will give you a clear price.
Do you work in Forest Park?
Yes. We’re based in Crawley and work across South East England, London and Scotland, and that includes Forest Park.
Does someone need to be in?
That depends on where the joints are. For work indoors, someone needs to let us in, while outside work can sometimes be arranged differently.
What do you need from me for a quote?
Where the job is, what the problem is and roughly how big it is. Photos by email help too.
Is it OK to seal over old sealant?
No. We remove every bit of old sealant first, so the new joint bonds to clean surfaces.
Where are you based?
Mr Mastic is based in Crawley. We cover Forest Park and the rest of Bracknell Forest.
Do the sealants smell?
There can be a smell while the sealant cures, but it fades. Ventilation helps.
Also near Forest Park
Other services in Forest Park
What affects the quote in Forest Park
We quote each job individually. These are the things that affect it:
- Mould in or behind the old joints
- The size of the job
- Whether old sealant or filler has to be cut out
- How easy the joints are to reach
A few things move the cost up or down: how much old sealant there is and how stubborn it is, any mould to treat, and whether the work is at height. We take all of that into account in your quote.
What we need to know
Photos by email are helpful but not essential. Please mention:
- What the problem is, such as mould, gaps, leaks or cracking
- Photos by email, if that’s easy
- Any access issues, like height or stairs
- The address or postcode of the job
If you are in Forest Park and need window mastic, ring 0345 464 0079 or email us. A short description of the job and where it is helps us quote, and we will agree the price before any work begins.