Windsor and Maidenhead · England
Window Mastic in Broomhall
Window mastic in Broomhall from a team with over 20 years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Damp patches on the reveal after heavy rain
- Rushed sealant from a window installation
- Draughts coming in around windows and doors
Common problems we fix in Broomhall
Joints that are too thin or too deep fail early. A thin smear across a wide gap has nothing to it, while a joint packed solid can’t stretch. Backing rod sets the right depth.
The most common problems we see are:
- Draughty joints inside around the window
- White mastic on grey or black frames
- Water coming in at the bottom corners of a door
- Cracked or shrunken mastic around the frame
Letting a property close to Sunningdale station? Then cracked frame mastic tends to show up as a draught or damp complaint, so it’s worth checking between lets.
What your quote should include
- Whether you can choose the colour
- Who turns up on the day
- What the quote includes, VAT included or not
- Whether all the old sealant comes out first
Window mastic in Broomhall
A window frame and the wall around it expand and shrink at different rates. Heat and cold make frames grow and shrink against brick or render that hardly moves. So the sealant has to stretch and recover, which is why we use a low-modulus product. Common call-outs are for rushed sealant from a window installation and black, perished sealant on frames, on patio & French doors, composite doors and aluminium frames.
In a smaller place like Broomhall, some walls face open ground and catch the full force of the weather, so exposed windows and doors face the weather head on. That’s hard on the mastic around frames and sills.
Whatever the size of the job, you get the same one-year guarantee in Broomhall and across Windsor and Maidenhead.
- Where
- Broomhall (SL5)
- Wider area
- Windsor and Maidenhead
- Guarantee
- One year on every job
- Quote
- A clear quote up front
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
When something else is needed
Some problems need a builder, plumber or other trade rather than us:
- Rotten timber, which needs a joiner first
- Damp problems in the wall away from the window
- A failed sealed unit that has misted up
Not sure which it is? You can phone 0345 464 0079 or email us and we’ll tell you honestly before you book.
Where we work in Broomhall
- Patio & French doors
- Timber windows & doors
- Aluminium frames
- Window sills
- Composite doors
- uPVC windows
DIY sealant or a professional job?
Not every job suits DIY: work at height, external movement joints, fire-rated sealant and large areas call for the right materials, safe access and experience.
If you do try it yourself, take your time over the preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it doesn’t work out, we can still put it right.
Nearby places to Broomhall
Also in Broomhall
Looking after it afterwards
After the cure time, these simple habits help:
- Keep drainage slots and sill grooves clear
- Keep timber frames painted
- Avoid blasting the frames with a pressure washer
- Use gentle cleaners on frames and sealant
Try not to touch the new joint while it cures, following the cure time we give you. Keep jet washers away from the frames.
A small gap around a frame only grows. As old mastic keeps shrinking, the gap widens, and heat escapes around the frame. A new joint closes it up.
Broomhall: your questions answered
Is Broomhall in your area for window mastic?
Yes. We work across London and the South East, and Broomhall is part of that. You can phone 0345 464 0079 or drop us an email and tell us what needs doing.
I let a flat near Sunningdale station. Can you help?
Yes, rental work is part of what we do. You can ring 0345 464 0079 or send us an email with the address and a few details, and we’ll give you a fixed price before work begins.
What do you put in the joint?
Each joint gets the product that suits it. Movement, water and weather all affect the choice.
Can you seal the gap between the frame and the plaster indoors?
Yes. Inside, the joint between frame and plaster is sealed neatly, using a paintable sealant if you want to decorate.
Do you have sealant for grey or black windows?
Yes, in most cases. Mention the frame colour when you ask for a quote and we’ll use the nearest match.
Do you work on first-floor windows?
Yes, if safe access is possible. Higher or awkward frames may need extra access, and we will confirm what’s needed.
Do I need to be at home?
For indoor joints, yes, someone needs to let us in. After that, you can carry on with your day.
How much does window mastic cost in Broomhall?
There’s no set price, as it depends on the job: its size, the old material, access and the product needed. We agree the price before any work begins.
How it works
At the end, we look at the finished work together. The work normally takes anything from an hour or two to a full day, depending on how many frames there are, depending on the size of the job. For a job in Broomhall, we agree the time, the access and parking before the day. Outdoor jobs depend on a dry day, since sealant needs a dry surface.
- First, we go round the frames with you and agree the list.
- The old mastic is cut out and scraped back to clean surfaces.
- Deep gaps get closed-cell backing rod to set the depth.
- The new sealant goes on in white, brown, anthracite grey, black or clear to suit.
- We tool each bead neatly and check every joint is closed.
Getting ready for the visit
- For business premises, tell us about site rules or sign-in
- Mention if the joints have been sealed before
- Clear items away from the joints we’re working on
How to get a quote
Want a quote for window mastic? Please ring 0345 464 0079 or email us and tell us about the job. We will explain what we’d do and give you a clear price before any work starts.
Read more
What affects the cost of window mastic
Some jobs are bigger than they look, and some smaller. What affects the quote:
- Which sealant suits the joint
- How much old sealant there is and how hard it is to remove
- The number of rooms or windows
- How easy the joints are to reach
The cost reflects the work involved, not a rough estimate. That’s why we ask about the job first.
What to tell us for a quote
There’s no need for technical detail. It helps if you can tell us:
- Where the job is, and your postcode
- The type of property
- If someone has resealed it before
- The rough size of the job
It all starts with a short chat. Describe the problem, the location and the size of the job, and we’ll explain how we’d tackle it. When it suits you, ring 0345 464 0079 or send us an email.
What happens if it’s left?
Redecorating is a good moment to renew the mastic. Fresh joints finish the job neatly. Homes in smaller places like Broomhall can face more weather, and failed outside joints let damp into walls. Indoors, a failed seal lets water into floors and panels as it would anywhere.
Instead of a standard rate, we price the job in front of us: how many joints, what’s in them now and how we reach them. The price is agreed before we begin.
What you get with us
- We leave the area clean and tidy
- Domestic, commercial and hotel work
- A choice of colours where the product allows
- We agree the colour with you first
Take a look at how sealant jobs are priced and what customers say.
Broomhall homes and the weather
London and the South East are among the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day. With historic houses such as Botleys Mansion (about 4.4 miles east) nearby, there’s older building stock in the area around Broomhall as well as newer homes. Where a home is older, older frames set in brick or stone need a sealant that suits them, and sometimes that is traditional sand mastic.
For an older house near a landmark such as Holy Trinity Church, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint. Schools such as Sunningdale School are buildings too, and its window and door frames need their mastic kept sound, just like a home’s.
Broomhall is about 4 miles south-west of Egham, in Windsor and Maidenhead. We provide window mastic to homes and businesses in Broomhall and nearby. Broomhall is one of 57 places in Windsor and Maidenhead where we work for window mastic. Reading is on our list too, about 15 miles from Broomhall.
All of SL5 is covered for window mastic, from the main roads to the quietest streets. If you need window mastic at a property on London Road, Abbey Wood and Cedar Drive or anywhere close by, our applicators can take on the job. Nearby, we also carry out window mastic in Sunningdale (1 mile north-west), Brick Hill (1 mile south), South Ascot (2 miles west), Windlesham (2 miles south-west) and Chobham (3 miles south-east). Larger places within reach include Maidenhead (10 miles north-west), Windsor (6 miles north), Boyn Hill (9 miles north-west), North Ascot (3 miles north-west), Cookham (12 miles north) and Furze Platt (11 miles north-west). Being one of Windsor and Maidenhead’s larger places, Broomhall has every kind of property, from flats to offices.
Near you in Broomhall
Locally, jobs take us to homes and businesses close to Charters School, Silwood Park and Holy Trinity CofE Primary School. Broomhall has its own railway station: Sunningdale station. Other landmarks nearby include Chobham Museum (3.3 miles south) and Heatherwood Hospital (2.7 miles north-west). The countryside around Broomhall includes Gracious Pond and Virginia Water Lake.