Surrey · England
Window & door mastic in Headley, Surrey
Mastic around window and door frames, sills and patio doors in Headley, with a 12-month guarantee on every job. Ask us for a quote.
- Gaps where the sill meets the wall
- Draughts coming in around windows and doors
- Cracked or shrunken mastic around the frame
Window mastic for homes and businesses in Headley
Homes in Headley have every kind of window: uPVC, aluminium, timber and composite, plus patio doors, French doors and sills. Each gets a sealant chosen for the frame and the wall it meets. Common call-outs are for hard, cracked sealant around windows and whistling draughts around closed windows, across aluminium frames, uPVC windows and timber windows & doors.
Around Headley, many homes face open ground, so their windows and doors take the full weather. Exposed frames and sills lose their mastic sooner than sheltered ones.
Big or small, you get the same one-year guarantee in Headley and across Surrey.
- Where
- Headley (KT18)
- Region
- Surrey
- Guarantee
- One year on every job
- Quote
- Quoted before any work starts
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
How we quote for window mastic
Call for a quick quote. What matters most is:
- Whether old sealant or filler has to be cut out
- When we can work, for business premises
- How many areas need sealing
- Access and height
The cost reflects the work involved, not a rough estimate. That is why we ask about the job first and agree the price before starting.
Asking for a quote
Photos by email are helpful but not essential. Try to tell us:
- Where the property is
- Pictures of the joints, sent by email
- The problem you’ve noticed
- How many joints, rooms or windows are involved
For window mastic in Headley, call 0345 464 0079 or drop us an email. Tell us what the problem is and where, and you will get a clear quote before we start.
Headley: your questions answered
I let a flat near Tadworth station. Can you help?
Yes, we work for letting agents and landlords. Just call 0345 464 0079 or send us an email and tell us about the property, and we’ll send you a clear quote.
Will you come out to Headley?
Yes, smaller places are covered as well as towns. Our work covers London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
What information do you need?
Only a few details: the address or postcode, what’s wrong and any access issues. After that, simply phone 0345 464 0079 or drop us an email.
When is the sealant fully cured?
Many sealants skin over quickly but take longer to cure fully. We’ll give you the cure time for the product we used.
Will the old sealant be removed?
Yes. All of the old material is cut out and the joint cleaned before resealing.
Do you hold any approvals?
Yes. ARBOMaster is the approved applicator scheme for Arbo sealants, and we are part of it.
Where is Mr Mastic based?
Mr Mastic is based in Crawley. Our applicators cover Headley.
Does someone need to be in?
If the work is inside, we need someone to let us in. After that, you can carry on with your day.
When something else is needed
It helps to know what we can’t do:
- A failed sealed unit that has misted up
- Penetrating damp from a failed cavity tray or render
- A sash or casement that won’t close properly
If in doubt, call 0345 464 0079 or drop us an email and we will say what we think before you book.
Joints and surfaces we work on
- uPVC windows
- Window sills
- Patio & French doors
- Timber windows & doors
- Aluminium frames
- Composite doors
Leave it or put it right?
Once mastic fails, rain can get between the frame and the wall. Over time that can mean damp patches, damaged plaster and rotting timber. Resealing now is a small job by comparison. Where a wall is exposed, as many are in small places like Headley, wind-driven rain gets into any failed joint, and damp in older walls is slow to dry out.
What it costs depends on the size of the job, how much old material has to come out and how easy the joints are to reach. You will have a clear quote before any work starts, so you know where you stand.
What you get with us
- Arbo and Everbuild products
- Full insurance on every job
- Approved under the ARBOMaster scheme
- Old sealant always removed completely
Take a look at our cost guide and what customers say.
DIY versus a professional finish
Sealing over old silicone is the commonest DIY error. Silicone doesn’t stick to old silicone, so it lifts and traps water and mould underneath. All the old material has to come out first.
If you’ve already had a go yourself, that is fine. We cut it out and start again, so tell us about it when you ask for a quote.
Towns and villages near Headley
More services for Headley
What window mastic looks like in Headley
Compared with the north and west, the South East gets less rain, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind. With historic houses such as Polesden Lacey (about 4.5 miles south-west) nearby, there’s older building stock in the area around Headley 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.
If you live in an older home near Church of St Mary the Virgin, frames set in older brick or stone need a sealant that suits the wall as well as the frame. Letting a property close to Tadworth station? Then sound mastic around windows and doors keeps out the draughts and damp that tenants notice first. Schools such as St Andrew's Catholic School are buildings too, and the mastic around its windows and doors needs looking after like any other building’s.
Headley is about 2 miles south-east of Ashtead, in Surrey. Anywhere in KT18, we can carry out window mastic at your property. 395 places in Surrey are on our list, large and small. You can also see our page for Crawley, roughly 13 miles from Headley.
We work across the KT18 postcode area for window mastic and the streets around it. Local streets include Tilley Lane, Cunliffe Close and Lee Green, and we cover them all. We also cover Walton on the Hill (2 miles east), Tadworth (2 miles north-east), Box Hill (2 miles south), Lower Kingswood (3 miles east) and Kingswood (3 miles east). Further out, we also cover Guildford (13 miles west), Woking (13 miles west), Epsom (4 miles north), Horley (9 miles south-east), Redhill (6 miles south-east) and Ewell (5 miles north).
Near you in Headley
We work in homes and buildings around Nower Wood and the streets around them. Headley’s nearest station is Tadworth station, about 1.9 miles east of the centre. Other landmarks nearby include Headley Court (0.5 miles north) and The Ashley Centre (3.3 miles north). Open spaces near Headley include Box Hill and Reigate Heath.
The process
Before we leave, we go over the finished joints with you. The work normally takes anything from an hour or two to a full day, depending on how many frames there are, depending on the amount of work. Somewhere like Headley needs a little journey planning: tell us about narrow lanes, gates, long drives and where we can park. Everything for the job comes with us, so a second trip is avoided where possible.
- 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.
- A flexible, weatherproof sealant is applied in a colour to suit the frame.
- Finally we tidy up and check each joint.
Before we arrive
- Tell us about access, such as stairs, a lift or high-level joints
- Tell us about any water getting in
- Tell us about any previous sealing or DIY attempts
Ask for a quote
To get a quote, phone 0345 464 0079 or email us and tell us where the job is and what the problem looks like. You will have a clear quote before any work starts.
Advice
Looking after it afterwards
Simple care keeps the joints in good condition. Our advice:
- Don’t paint over the silicone
- Don’t aim a pressure washer at the joints
- Clean frames with a soft cloth and soapy water
- Keep paint and stain on wooden frames in good order
Silicone cannot normally be painted, so if you are planning to paint the frames or walls, tell us beforehand. There are paintable sealants for joints that need it.
Look out for the warning signs: 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.
For landlords and businesses
Mouldy or split sealant often shows up at the end of a tenancy, and it’s easy to sort out between tenants. Several properties can go on one quote.
We also work for property managers and facilities teams in Headley and across Surrey. We can quote a run of properties together, and we’re fully insured for the work.