Surrey · England
Window & door mastic in Redhill, Surrey
Window mastic across Redhill and nearby, with every bit of old sealant taken out first and a one-year guarantee.
- Mastic that is falling out in pieces
- Draughty joints inside around the window
- Rain getting in at the frame or under the sill
Window mastic for homes and businesses in Redhill
Around Redhill we seal all kinds of frames: uPVC, aluminium, timber and composite, plus patio doors, French doors and sills. The sealant is chosen to suit the frame material and the wall. If you have damp patches on the reveal after heavy rain and cracked sealant at the sill ends, we can help, on uPVC windows, window sills and composite doors alike.
Plenty of homes in a town like Redhill have had conservatories, patio doors or new windows added over the years. Each one adds more joints to look after, and those joints age at different rates. Leaks normally start at a sill, a frame head or a glazing joint.
A 12-month guarantee comes as standard, so you’re not left on your own once the job is done.
- Place
- Redhill (RH1, RH2)
- Region
- Surrey
- Guarantee
- One year on every job
- Quote
- Quoted before any work starts
- Call
- 0345 464 0079
- Updated
- 26 October 2026
Signs you need window mastic in Redhill
Sun, frost and rain wear sealant out. UV light hardens the outside of the bead, and over the years it loses its give, cracks and comes away.
Common reasons people contact us include:
- Draughts coming in around windows and doors
- Gaps between the frame and the inside reveal
- Mastic that is falling out in pieces
- Rain getting in at the frame or under the sill
If you look after a building such as St Joseph's Catholic Primary School, the mastic around its windows and doors needs looking after like any other building’s.
What to look for in a quote
- Who does the work, and how experienced they are
- Is VAT in the price?
- What product goes in the joint
- When the joint can take water or movement
When something else is needed
To be straight with you, there are a few things sealant won’t fix:
- Rotten timber, which needs a joiner first
- Penetrating damp from a failed cavity tray or render
- Misting between the panes of a double-glazed unit (that needs a new unit)
If you are not sure, just phone 0345 464 0079 or send us an email and we’ll give you a straight answer before booking.
Surfaces we seal
- Patio & French doors
- uPVC windows
- Aluminium frames
- Window sills
- Timber windows & doors
- Composite doors
What we do, step by step
We keep the work tidy and contained to the area we are working on, so you can get on with your day. Expect the work to take anything from an hour or two to a full day, depending on how many frames there are. For a job in Redhill, we need access to where the work is and somewhere nearby to park. For outside work, let us know about side access, gates and any upper-floor joints.
- We start by checking each window and door with you.
- We remove the old mastic and clean the frame and the wall.
- We fit backing rod in deep gaps so the sealant is the right depth.
- New exterior sealant goes on in a matching colour and is tooled smooth.
- Every joint is checked before we leave.
Getting ready for the visit
- Mention any leaks or damp you’ve noticed
- Plan for the work area to be out of bounds to pets and children
- Let us know about parking restrictions
Get a quote
For a quote, phone 0345 464 0079 or email us with the location and a short description of the problem. You will have a clear quote before any work starts.
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Nearby places to Redhill
Other services in Redhill
Redhill: your questions answered
Is there a guarantee on window mastic in Redhill?
Every job comes with our one-year guarantee, wherever it is. We are also fully insured and ARBOMaster approved.
Can you help a landlord with a rental near Redhill station?
Yes, landlords and agents are among the people we work for. Just ring 0345 464 0079 or send us an email with the address and what needs doing, and we will give you a clear price.
Is it OK to seal over old sealant?
No, it will not last. It can look neat for a few weeks, but the new layer lifts away from the old one. Removing the old sealant completely is the only lasting way.
Do you take out the old sealant first?
Yes. We cut out all the old sealant and clean the joint before applying anything new.
Will resealing my frames help with draughts?
Yes, if the air is getting in around the frame. If it’s through the window’s own seals or a hinge, that is a different fix, and we’ll say so.
What sealant do you use?
Quality sealants from brands including Arbo and Everbuild, chosen to suit the joint. We will tell you what we’re using and why.
Do you do commercial work?
Yes, regularly. We can plan bigger jobs in stages to suit the site.
Can you seal the gap between the frame and the plaster indoors?
Yes. Draughts often come through the inside gap too, so it can be worth sealing both.
Why it’s worth doing now in Redhill
Failed mastic is not a reason to replace sound windows. Where the frames are sound, new mastic normally deals with draughts and leaks at the edges. If we find failed glass units or worn seals, we will tell you. In Redhill, as anywhere, most leaks start as a small gap in a joint, and they’re far easier to fix early.
Doing several joints on one visit is generally more efficient than separate visits, so it’s worth mentioning everything you’d like done. We will send you a clear quote for the lot.
Why book with us
- We never seal over old sealant
- Quality sealants from Arbo and Everbuild
- Tidy, careful work
- Domestic, commercial and hotel work
Take a look at what affects the cost or customer reviews.
How we quote for window mastic
The price is agreed before any work begins. It takes into account:
- Any mould that needs treating
- The product the joint needs
- How many areas need sealing
- Access and height
What it costs depends on the size of the job, how hard the old material is to remove and how easy the joints are to reach. You will have a clear quote before any work starts.
Helping us quote
When you contact us, these details help:
- Access, such as stairs, a lift or height
- What’s wrong with the joints now
- The address or postcode of the job
- Roughly how big the job is
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.
Surface by surface
Patio & French doors
Door frames take knocks and movement every time the doors are used. The sealant must cope with it, where a rigid one would crack.
Timber windows & doors
Soft or rotten wood cannot be sealed successfully. If we find rot, we’ll tell you before going ahead, as that is a job for a joiner.
Should I try it myself first?
The biggest DIY mistake is sealing over old sealant. New silicone will not bond to old, so it lifts and traps water and mould underneath. All the old material has to come out first.
Overfilling a joint is a classic DIY mistake. A heavy bead looks messy and copes badly with movement, and getting the depth right matters as much as the look.
Window mastic in Redhill: local notes
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.
Rented homes near Redhill station change hands often, and renewing tired window mastic between tenants heads off draught and damp complaints. For an older house near a landmark such as Saint Matthew's Church, the joint between an old wall and a newer frame is normally the first place rain gets in.
Redhill is about 9 miles north of Crawley, in Surrey. For window mastic in and around Redhill, it’s easy to get a quote: please call 0345 464 0079 or email us. We are based in Crawley and cover Surrey, Redhill included. We cover 395 towns and villages across Surrey, from the larger towns to small villages. There’s also a page for Crawley, roughly 9 miles from Redhill.
All of RH1 and RH2 is covered for window mastic. That includes homes and businesses on High Street, Station Road and Church Road and the roads around them. Redhill is on the A23 and A25, so it’s easy for us to get to with everything needed for window mastic. We also cover the places around Redhill: Earlswood (1 mile south), Holmethorpe (1 mile north-east), Meadvale (1 mile south-west), South Earlswood (2 miles south) and South Nutfield (2 miles south-east). Within a short drive, we also cover Epsom (8 miles north-west), Horley (4 miles south), Ewell (9 miles north-west), Walton-on-Thames (14 miles north-west), Caterham (5 miles north-east) and Dorking (7 miles west). Redhill is one of the larger places we cover in Surrey.
What’s near Redhill
In Redhill, that means homes and buildings near The Carrington School, Nutfield Marshes and Dunottar School and the streets around them. There’s a railway station in Redhill itself: Redhill station. Nearby you’ll also find The Belfry (under half a mile north) and Surrey Fire Museum (1.2 miles west). Not far away are Colley Hill and Reigate Heath.