Surrey · England
Window & door mastic in Selsdon, Surrey
Mastic around window and door frames, sills and patio doors in Selsdon, with a 12-month guarantee on every job. Ask us for a quote.
- Mastic that has split away from the wall
- Cold air getting in at the frame edge
- Damp patches on the reveal after heavy rain
Surface by surface
Timber windows & doors
Older timber windows in stone or brick can suit sand mastic rather than modern sealant. We will tell you which suits your home.
uPVC windows
We clean the frame edge carefully so the plastic is not marked, then the sealant goes in between frame and wall and tooled smooth.
Window mastic for homes and businesses in Selsdon
Colour matters on a frame. White, brown, anthracite grey, black and clear sealants are all available, so the line suits the frame instead of standing out. If you are dealing with gaps left after new windows were fitted and cold air getting in at the frame edge, we can help, on uPVC windows, window sills and composite doors alike.
In smaller places like Selsdon, homes range from older cottages to newer houses, with windows to match: timber, uPVC and aluminium. The right sealant depends on the frame and on what it sits in.
A one-year guarantee comes as standard, so you’re not left on your own once the job is done.
- Location
- Selsdon (CR2, CR0)
- Region
- Surrey
- Guarantee
- One year on every job
- Price
- A clear price before work begins
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
Nearby places to Selsdon
Also in Selsdon
What affects the quote in Selsdon
Call for a quick quote. What matters most is:
- Working hours on commercial sites
- Access and height
- How many areas need sealing
- The number and length of the joints
A failed joint rarely gets cheaper to fix by waiting, as water and mould keep getting in. If you are not sure whether it needs doing, call 0345 464 0079 or send us an email and we will give you an honest view and a quote.
Asking for a quote
Before you ask for a quote, have a think about:
- If someone has resealed it before
- Access, such as stairs, a lift or height
- What’s wrong with the joints now
- The rough size of the job
Every job is quoted individually. Just call 0345 464 0079 or drop us an email with the details, and photos are welcome.
How to look after the new joints
Once the sealant has cured, a few habits help it last:
- Do not paint over the silicone
- Make sure the drainage slots aren’t blocked
- Keep paint and stain on wooden frames in good order
- Keep solvents and bleach off the sealant
Silicone can’t usually be painted, so mention any painting plans before any work starts. There are paintable sealants for joints that need it.
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?
Some jobs are best left to a professional: high-level joints, fire-rated gaps, external movement joints and big jobs call for the right materials, safe access and experience.
If you are set on DIY, put the effort into preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it fails, we can still redo it.
Why act early in Selsdon
A quick bead over the top of old mastic looks like an easy fix, but new sealant cannot bond to old, crumbling mastic. It peels before long, and water still gets in behind. Proper resealing starts with removing the old joint. Around Selsdon, water from a failed joint in an older home can soak into timber and plaster, which is far harder to put right than the sealant itself.
The cost depends on the size of the job, how much old material has to come out and how easy the joints are to reach. We give a clear quote before we start, so you know where you stand.
What you get with us
- You choose the colour before work begins
- Tidy, careful work
- An ARBOMaster approved applicator
- Full insurance on every job
Read what affects the cost or our reviews.
Landlords, agents and businesses in Selsdon
We work for landlords and letting agents as well as homeowners. Sealant work between tenants keeps a property looking cared for before the next move-in.
Hotels need rooms back in use, so the work can be planned room by room. We have worked in hotels as well as homes and businesses.
How it works
All our tools and materials come with us in the van. Once we have agreed what’s being done, we protect the area and start. Most jobs take a morning for a couple of windows and a door. For a job in Selsdon, we agree the time, the access and parking before the day. Outdoor jobs depend on a dry day, since sealant needs a dry surface.
- We start by checking each window and door with you.
- The old mastic is cut out and the surfaces cleaned back.
- We fit backing rod in deep gaps so the sealant is the right depth.
- We apply a weatherproof sealant to match the frame and tool it neatly.
- Every joint is checked before we leave.
How to prepare
- Let us know about stairs, lifts or work at height
- Tell us about any water getting in
- Move anything stored near the joints
Get a quote
To get a quote, call 0345 464 0079 or drop us an email and tell us where the job is and what the problem looks like. We will give you a clear quote before any work starts.
Related advice
Selsdon questions
Do you work for landlords with property near Sanderstead station?
Yes. We work for landlords and letting agents as well as householders. You can phone 0345 464 0079 or drop us an email with the details for a clear quote.
Do you cover Selsdon for window mastic?
Yes, Selsdon is within the area we cover. We work across London and the South East. Just phone 0345 464 0079 or send us an email with a few details of the job, and we’ll send you a clear quote.
Can I add another job to the visit?
Of course. Doing several areas at once is generally more efficient, so mention them when you ask for a quote.
Can new window sealant be painted?
That depends on the product. Some hybrid sealants can be painted; silicone can’t. Tell us if you’re decorating and we will choose accordingly.
Is it worth trying it myself?
Sometimes. The key is preparation: remove all the old material and work on a clean, dry joint. If it doesn’t work out, we can redo it.
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 match it as closely as we can.
Will there be a smell?
That depends on the sealant. Some products have a noticeable smell, others very little, and any smell fades as they cure.
How long before the joint can be used?
Cure times vary by product and the conditions. Before we leave, we’ll tell you the cure time.
Selsdon homes and the weather
The South East is one of the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast. Historic houses like Addington Palace (about 1 mile north-east) are a reminder that the area around Selsdon has older buildings as well as new. Where a home is older, older timber frames in brick or stone need a different approach from a modern uPVC window.
Rented homes near Sanderstead station change hands often, and cracked frame mastic tends to show up as a draught or damp complaint, so it’s worth checking between lets. Managing a site like Selsdon Primary and Nursery School? Then larger buildings have plenty of frames, and the mastic around each one ages. For an older house near a landmark such as St Francis, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall.
Selsdon is about 2 miles south-east of Croydon, in Surrey. Whether you’re in the middle of Selsdon or further out, we cover window mastic for every kind of property. We cover 395 towns and villages across Surrey. Our London page covers work nearby, about 11 miles away.
Here we cover the CR2 and CR0 postcode area for window mastic. You will find streets such as York Road, Byron Road and Abbey Road. Nearby, we also carry out window mastic in Forestdale (1 mile east), Addington (1 mile north-east), Sanderstead (1 mile south-west), Coombe (1 mile north-west) and Farleigh (2 miles south-east). Within a short drive, we also cover Epsom (9 miles west), Horley (13 miles south-west), Redhill (9 miles south-west), Ewell (9 miles west), Reigate (10 miles south-west) and Caterham (4 miles south).
Local landmarks in Selsdon
Around Selsdon, our work takes us to homes and buildings near The Sir Julian Huxley pub, The Quest Academy and Littleheath Woods, among other places. The nearest railway station is Sanderstead station, roughly 1.7 miles west. Other landmarks nearby include St George's Walk (2.7 miles north-west) and Croydon Airport Visitor Centre (2.9 miles west). The countryside around Selsdon includes Duppas Hill and Bramley Bank.