Bracknell Forest · England
Jennett's Park Window Mastic
Window and door frames in Jennett's Park need attention? We remove the old material, prepare the joints and seal them properly, and the work is guaranteed for a year.
- A bead that does not match the frame
- Mastic that’s falling out in pieces
- Cracked internal joints between frame and plaster
Window mastic for homes and businesses in Jennett's Park
Mr Mastic’s applicators have more than 20 years’ experience with window and door sealants. We’re fully insured ARBOMaster approved applicators, and every job is covered by a 12-month guarantee. If you have cracked sealant at the sill ends and whistling draughts around closed windows, we can put it right, on aluminium frames, composite doors and timber windows & doors alike.
Homes around Jennett's Park range from older properties to newer houses, and their windows range just as widely. The right sealant depends on the frame and on what it sits in.
All our work is covered by a one-year guarantee.
- Where
- Jennett's Park (RG12)
- Region
- Bracknell Forest
- Guarantee
- 12 months on all our work
- Quotes
- A clear quote up front
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
Window mastic in Jennett's Park: local notes
Bracknell, which Jennett's Park is part of, is one of England’s post-war new towns. With many homes from the post-war decades, replacement windows and doors are common. That mastic ages as well, and sills and frame heads are where leaks start. Rainfall in the South East is lower than in much of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
For landlords with property near Martins Heron station, renewing tired window mastic between tenants heads off draught and damp complaints. Schools such as Harmans Water Primary School are buildings too, and the mastic around its windows and doors needs looking after like any other building’s.
Jennett's Park is about 1 mile east of Bracknell, in Bracknell Forest. We carry out window mastic for homes and businesses in Jennett's Park and nearby. Our Bracknell Forest coverage runs to 41 places, Jennett's Park among them. Our Reading page covers work nearby.
Jobs for window mastic in RG12 is quoted and booked the same way as anywhere else. Local streets include Bog Lane, The Square and Mendip Road, and we cover them all. Close by, we work in Martins Heron (1 mile east), The Warren (1 mile south-east), Harmans Water (1 mile south-west), Forest Park (1 mile south) and Bullbrook (1 mile north). Further out, we also cover Sandhurst (5 miles south-west), Binfield (3 miles north-west), College Town (5 miles south-west), Little Sandhurst (5 miles south-west), Owlsmoor (4 miles south-west) and Home Farm (3 miles south-west).
Around Jennett's Park
In Jennett's Park, that means homes and buildings near Ranelagh School, The Horse And Groom Public House and The Brakenhale School, among other places. Jennett's Park has its own railway station: Martins Heron station. A little further out are Heatherwood Hospital (1.9 miles east) and The Lexicon (1.1 miles north-west). Not far away are Heath Lake and Wildmoor Heath.
When to call us in Jennett's Park
Frames are never completely still. Sun on a frame makes it expand, and it contracts again overnight, while the brick or render around it hardly moves. If the sealant can’t stretch, it splits.
It’s worth asking for a quote if you see:
- Gaps left after new windows were fitted
- Draughty joints inside around the window
- Black, perished sealant on frames
- Cold air getting in at the frame edge
For an older house near a landmark such as St Paul, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall.
What to look for in a quote
- How hidden problems are handled
- What the cure time is
- How the joint is cleaned and prepared
- Is VAT in the price?
Looking after it afterwards
How long the joints last depends on use and care. We suggest:
- Keep solvents and bleach off the sealant
- Paint up to the joint, not over it
- Avoid blasting the frames with a pressure washer
- Wipe condensation off the frames
Wipe the frames with soapy water when you clean the windows, and avoid solvent cleaners on the sealant.
Leaks usually show up in wet, windy weather, but sealant goes on best when frames and walls are dry. Dealing with it when you first notice a crack avoids chasing leaks through the wet months.
Should I try it myself first?
The biggest DIY mistake is sealing over old sealant. Silicone does not stick to old silicone, so it peels away and traps moisture behind it. Everything old must be removed first.
If you’ve already had a go yourself, that’s fine. We cut it out and start again, so tell us about it when you ask for a quote.
What we do, step by step
On the day, we start by going over the job with you, so you know exactly what we are doing. We protect the surfaces around the joints before any work begins. Most jobs take a few hours for a few frames, or a day or more for a whole house. In a smaller place like Jennett's Park, parking is seldom the issue; lanes, gates and long drives are worth mentioning. For outside work, side access and the height of the joints help us plan.
- First, we go round the frames with you and agree the list.
- We remove the old mastic and clean the frame edge and wall.
- Where the gap is deep, backing rod goes in first.
- A flexible exterior sealant is applied in a colour to suit the frame.
- We tool each bead neatly and check every joint is closed.
Preparing for the visit
- Tell us if parking is tricky
- Plan for the work area to be out of bounds to pets and children
- Let us know about stairs, lifts or work at height
How to get a quote
Asking for a quote is easy: let us know the job and the location. Photos by email help us understand the job, and we will take it from there.
Advice
What we cannot put right
Sealant is not the answer to every problem, and we will tell you before any work starts. It will not solve:
- A sash or casement that won’t close properly
- Soft or decayed wood in the frame
- Damp problems in the wall away from the window
Not sure which it is? You can phone 0345 464 0079 or send us an email and we will tell you honestly.
Joints and surfaces we work on
- Timber windows & doors
- Composite doors
- Aluminium frames
- uPVC windows
- Patio & French doors
- Window sills
Your questions about window mastic in Jennett's Park
Can you help a landlord with a rental near Martins Heron station?
Yes. We work for landlords and agents as well as homeowners, 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.
Should the sealant in an older Jennett's Park home be renewed?
Usually, yes, if it’s cracked, shrunk, mouldy or coming away. New sealant won’t stick to old, so the old bead has to come out completely first.
What information do you need?
Where the job is, what the problem is and roughly how big it is. Photos by email help too.
Do I need to be at home?
If the work is inside, we need someone to let us in. Once we have agreed the job, you don’t need to watch us work.
Is it messy?
Very little: the area around the joints is protected first, and we clear up the old sealant and our materials before we leave.
Can new window sealant be painted?
Silicone generally won’t take paint. If you plan to paint, tell us first and we can use a paintable sealant where it suits the joint.
How long before the joint can be used?
Many sealants skin over quickly but take longer to cure fully. We will tell you how long to leave the joint before we leave.
Is it OK to seal over old sealant?
No, because it fails. The old sealant always comes out first.
What affects the quote in Jennett's Park
There’s no set price list, because no two jobs are the same. What we look at:
- The old material and how stubborn it is
- Any mould that needs treating
- When we can work, for business premises
- How many areas need sealing
Rather than a set price list, we look at what your job involves: how many joints, what’s in them now and how we reach them. You’ll know the price before we begin.
Helping us quote
When you contact us, it’s useful to know:
- What’s wrong with the joints now
- Whether it’s a home or a business
- Whether it has been sealed before
- The address or postcode of the job
The more we know about the job, the more useful the quote. Tell us where the job is, what’s wrong and how much there is.
Different surfaces, different methods
uPVC windows
Fitters’ mastic on plastic frames is sometimes thin and rushed. We cut it out, back any deep gaps and reseal properly.
Timber windows & doors
On period timber windows, traditional sand mastic is sometimes the better choice. We’ll tell you which suits your home.