Windsor and Maidenhead · England
Lake End Window Mastic
Problem with your window and door frames in Lake End? We remove the old material, prepare the joints and seal them properly, with a 12-month guarantee.
- Black, perished sealant on frames
- Rushed sealant from a window installation
- Draughty joints inside around the window
DIY versus a professional finish
The difference is mostly in the preparation and the product. We take joints back to clean, dry surfaces, and the sealant is matched to the joint and its conditions, and the work is guaranteed for a year.
A careful DIYer can reseal a simple joint, such as a straightforward joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
Window mastic in Lake End
Most frames have an outside joint and an inside one. The external joint is the weather seal; inside, the joint between frame and plaster stops draughts and tidies the reveal. We seal one or both, depending on what’s needed. We’re often asked to deal with cracked sealant at the sill ends and mastic that’s falling out in pieces, on aluminium frames, window sills and composite doors.
In a village or hamlet like Lake End, older cottages and farmhouses often have timber windows set in stone or brick. Older buildings like these do not always suit modern silicone, and sometimes a traditional sand mastic is the better choice.
A 12-month guarantee comes with the work, just as it does everywhere we cover.
- Where
- Lake End (SL4)
- Region
- Windsor and Maidenhead
- Guarantee
- One year on every job
- Quote
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
Work for landlords, hotels and businesses
We also work for businesses, from offices to washrooms and kitchens. On commercial sites, working times can be discussed when we quote.
Failed sealant is one of the commonest items on a check-out report. We can quote for more than one property at once.
Different surfaces, different methods
Aluminium frames
Metal frames expand in the sun and are often slim, with little room for error. A tidy bead in anthracite grey, black or a matching colour keeps the clean look.
Window sills
Masonry sills can have joints where water gets in, including the one between the sill and the frame above. We seal those with a sealant suited to masonry.
Leave it or put it right?
A cracked joint around a frame lets rain into the wall. Left long enough, it can stain inside walls, spoil plaster and rot wooden frames. Resealing now is a small job by comparison. In a small place like Lake End, homes can be exposed to wind and rain, which finds any gap, and older walls, once damp, take a long time to dry.
Homes and businesses are quoted the same way: the amount of work, the access and the products needed, along with when we can work on site. Call for a quick quote and we’ll explain what it covers.
What you get with us
- Colour agreed with you before we start
- 4.9 on Google from 180+ five-star reviews
- A 12-month guarantee on all work
- We never seal over old sealant
Take a look at our cost guide and our reviews.
Aftercare tips
To keep the joints looking good and working properly:
- Wipe condensation off the frames
- Avoid blasting the frames with a pressure washer
- Wash the frames with mild soapy water
- Look round the frames every year or so
Silicone can’t normally be painted, so mention any painting plans before work begins. We can use a paintable sealant where that matters.
Signs to watch for: split or missing mastic, gaps, damp patches inside or black mould on the reveal. If you notice one, it’s time to get the joint looked at.
Also near Lake End
What else we do in Lake End
What we cannot put right
To be straight with you, some problems need a different trade:
- A failed sealed unit that has misted up
- A door that needs adjusting, rehanging or new seals
- Damp coming through the wall itself rather than the frame joint
Not sure which it is? You can phone 0345 464 0079 or email us and we will tell you honestly.
Surfaces we seal
- Timber windows & doors
- Aluminium frames
- Window sills
- uPVC windows
- Composite doors
- Patio & French doors
FAQs for Lake End
Will you come out to Lake End?
Yes, we do. Our work covers London and the South East, from towns to the smallest places. Longer journeys are simply planned in advance.
Is Lake End in your area for window mastic?
Yes, Lake End is within the area we cover. We work across London and the South East. You can ring 0345 464 0079 or drop us an email and let us know what needs doing, and we will send you a clear quote.
Do you guarantee window mastic?
Yes. Each job is covered for 12 months.
Do you work for landlords and businesses?
Yes, regularly. Several properties can go on one quote, and between tenancies is a good time for the work.
When is the sealant fully cured?
Cure times vary by product and the temperature. Before we leave, we’ll tell you the cure time.
Will the old sealant be removed?
Yes. All of the old material is cut out and the joint cleaned before resealing.
What does window mastic cost?
Every job is different, so each one gets its own quote. To get one, ring 0345 464 0079 or send us an email with a short description of the job.
Is the new sealant paintable?
Silicone generally will not take paint. If you plan to paint, tell us first and we can use a paintable sealant where it suits the joint.
How the visit works
Once we’re on site, we compare the joints with what we discussed. If we find something unexpected, we talk it through with you first. After that, the work takes a morning for a couple of windows and a door. Somewhere like Lake End needs a little journey planning: let us know about lanes, gates and parking. Everything for the job comes with us, so a second trip is avoided where possible.
- First, we confirm safe access to each frame.
- All the failed sealant is cut away.
- The surfaces are cleaned and left dry.
- Deep voids are backed, then the sealant is gunned in.
- The joint is shaped to shed water and the area tidied.
Before we arrive
- Let us know about parking restrictions
- Let us know if you’ve seen damp or leaks
- For business premises, tell us about site rules or sign-in
Get a quote
Quotes start with a quick conversation. Describe the problem, the location and the size of the job. Whenever you’re ready, phone 0345 464 0079 or email us.
Advice
What window mastic looks like in Lake End
With historic houses such as Dorney Court (about 0.6 miles south-west) nearby, there’s older building stock in the area around Lake End as well as newer homes. Where a home is older, older timber frames in brick or stone need a different approach from a modern uPVC window. London and the South East are among the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
Letting a property close to Burnham station? Then renewing tired window mastic between tenants heads off draught and damp complaints. Homes close to Church of St James include some older properties, and the joint between an old wall and a newer frame is usually the first place rain gets in. Managing a site like Cippenham Infant School? Then its window and door frames need their mastic kept sound, just like a home’s.
Lake End is about 2 miles west of Slough, in Windsor and Maidenhead. Jobs in Lake End get the same care as everywhere else we work: old sealant removed completely, careful preparation and a one-year guarantee. 57 places in Windsor and Maidenhead are on our list. Reading is on our list too, about 14 miles from Lake End.
Jobs for window mastic in SL4 works the same way as everywhere else we cover. That includes homes and businesses on Lake End Road and Ashford Lane. We also cover the places around Lake End: Dorney (1 mile south-east), Dorney Reach (1 mile west), Huntercombe (1 mile north-east), Cippenham (1 mile east) and Burnham (1 mile north). Within a short drive, we also cover Maidenhead (3 miles west), Windsor (3 miles south-east), Boyn Hill (3 miles west), North Ascot (6 miles south), Cookham (4 miles north-west) and Furze Platt (4 miles north-west).
Landmarks near Lake End
Around Lake End, our work takes us to homes and buildings near The Pineapple Public House, Haymill Valley and The E-Act Burnham Park Academy. The nearest railway station is Burnham station, roughly 1.2 miles north-east. Nearby you’ll also find Windsor Castle (3.1 miles south-east) and The History On Wheels Museum (1.6 miles south-east). Not far away are Taplow Lake and Bray Pit.