Surrey · England
Window & door mastic in Lightwater, Surrey
Window mastic for Lightwater, by sealant specialists with 20+ years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Water coming in at the bottom corners of a door
- Gaps left after new windows were fitted
- Whistling draughts around closed windows
About our window mastic in Lightwater
Most frames have an outside joint and an inside one. The external joint is the weather seal; the internal joint closes the gap to the plaster and stops draughts. We seal one or both, depending on what’s needed. If you have cracked internal joints between frame and plaster and sealant in the wrong colour for the frame, we can put it right.
Around Lightwater, conservatories, garden rooms and patio doors are often part of the house. Their glazing joints and frame seals are as much a part of the job as the windows, and any older timber or sash windows need a sealant that suits them.
We stand behind the work with a one-year guarantee.
- Place
- Lightwater (GU18, GU19)
- Wider area
- Surrey
- Cover
- A year, on every job
- Quote
- A clear price before any work starts
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
What happens on the day
There’s no need to move everything out before we come, just the space around the work. We protect the rest, and the job takes a few hours for a few frames, or a day or more for a whole house for a typical job. In a smaller place like Lightwater, 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.
- Each frame is looked over and we agree which ones need resealing.
- The old mastic is cut out and scraped back to clean surfaces.
- Where the gap is deep, backing rod goes in first.
- The new sealant goes on in white, brown, anthracite grey, black or clear to suit.
- Every joint is tooled smooth and checked before we leave.
How to prepare
- Tell us about any previous sealing or DIY attempts
- Clear the area around the work
- Let us know about stairs, lifts or work at height
Getting a quote
Need a quote? Please ring 0345 464 0079 or send us an email with a few details. You’ll know what we plan to do, and what it will cost, before any work begins.
Related advice
FAQs for Lightwater
I let a flat near Bagshot station. Can you help?
Yes, rental work is part of what we do. Just phone 0345 464 0079 or send us an email and tell us about the property, and we’ll give you a clear price.
Can you do window mastic in Lightwater?
Yes, Lightwater is within the area we cover. We work across London and the South East. Just call 0345 464 0079 or email us with a few details of the job, and we’ll give you a clear price.
Do you take out the old sealant first?
Always. Sealing over old sealant is the main reason resealing fails early, so we never do it.
Will there be a smell?
Sometimes, a little. Any smell clears as the sealant cures, and ventilation helps.
What do you need from me for a quote?
The location, the problem and the rough size of the job. Photos by email help too.
Can you get sealant to suit coloured frames?
Yes. We can use white, brown, anthracite grey, black or clear.
Do you guarantee window mastic?
Yes. Our one-year guarantee covers every job.
Are you fully insured?
Yes, we are fully insured.
Why it’s worth doing now in Lightwater
Draughts and leaks do not always mean new windows. If the frames and glass are in good order, resealing the joints is often all that’s needed. If we find failed glass units or worn seals, we will tell you. In an older home around Lightwater, damp from a failed joint can get into timber and plaster, which is far harder to put right than the sealant itself.
Some things make a job bigger or smaller: how much old sealant there is and how stubborn it is, any mould to treat, and whether we need extra access for height. We take all of that into account in your quote.
Why choose Mr Mastic in Lightwater
- Tidy, careful work
- Arbo and Everbuild products
- We’re fully insured
- Sealant colour chosen to suit
Take a look at our cost guide or what customers say.
Nearby places to Lightwater
Other services in Lightwater
Frames and glazing around Lightwater
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 an older house near a landmark such as All Saints, the joint between an old wall and a newer frame is usually the first place rain gets in. Letting a property close to Bagshot station? Then renewing tired window mastic between tenants heads off draught and damp complaints. Managing a site like Hammond School? Then its window and door frames need their mastic kept sound, just like a home’s.
Lightwater is about 3 miles east of Camberley, in Surrey. Across the GU18 area, we can carry out window mastic at your property. Across Surrey, we cover 395 places, and Lightwater is one of them. For nearby work, see our Reading page, about 15 miles away.
Postcode districts we cover here for window mastic: GU18 and GU19. If you need window mastic at a property on Ambleside Road, Ridgeway Close and Shrublands Drive or a nearby road, we can help. Nearby, we also carry out window mastic in Donkey Town (1 mile south-east), Bagshot (1 mile north-west), Windlesham (1 mile north-east), Lucas Green (2 miles south-east) and West End (2 miles south-east). Further out, we also cover Guildford (8 miles south-east), Woking (5 miles south-east), Camberley (3 miles west), Farnham (11 miles south-west), Egham (8 miles north-east) and Walton-on-Thames (12 miles east).
What’s near Lightwater
Typical jobs here are in homes near Gordon's School and Brentmoor Heath, among other places. The nearest railway station is Bagshot station, about 1.3 miles north-west. Well-known places in the area include Brookwood Hospital (3.3 miles south-east) and The Museum of The National Rifle Association (2.7 miles south). For a walk, there’s Brookwood Lye.
Can I do it myself?
If you do try it yourself, take your time over the preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it doesn’t work out, we can still put it right.
Some jobs are best left to a professional: high-level joints, fire-rated gaps, external movement joints and big jobs need the right product, the right access and the right method.
Honest limits
To be straight with you, some problems need a different trade:
- A door that needs adjusting, rehanging or new seals
- Condensation trapped between the panes
- Faulty window hardware
If in doubt, phone 0345 464 0079 or drop us an email and we’ll say what we think.
Where we work in Lightwater
- Aluminium frames
- uPVC windows
- Timber windows & doors
- Window sills
- Composite doors
- Patio & French doors
How we quote for window mastic
We don’t publish a price list, because no two jobs are the same. The quote depends on:
- The amount of work
- Which sealant suits the joint
- The old material and how stubborn it is
- Access and height
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 will explain what it covers.
Asking for a quote
To help us quote quickly, let us know:
- The address or postcode of the job
- The rough size of the job
- Photos by email, if that’s easy
- How we’d reach the joints
To get a quote, ring 0345 464 0079 or email us and tell us where the job is and what the problem looks like. You’ll have a clear quote before we start.
Surface by surface
Patio & French doors
Patio and French doors have the longest joints on most houses. Most leaks start at the bottom corners, so we pay close attention there.
Window sills
Masonry sills can have joints where water gets in, and the joint under the frame can let rain run behind. We seal those with a sealant suited to masonry.
Keeping the joints in good condition
Aftercare is simple:
- Check the mastic once a year
- Keep solvents and bleach off the sealant
- Air rooms to keep condensation down around windows
- Repaint timber before it’s bare
Keep sill grooves and drainage slots clear, so rain drains out rather than building up at the sealant.
Signs to watch for: split or missing mastic, gaps, damp patches inside or black mould on the reveal. Any of these is worth a call.