Surrey · England
Window & door mastic in Onslow Village, Surrey
Our applicators work in Onslow Village on mastic around window and door frames, sills and patio doors. Old sealant removed completely, joints prepared properly and a one-year guarantee.
- Water coming in at the bottom corners of a door
- Draughty joints inside around the window
- Whistling draughts around closed windows
Window mastic in Onslow Village
The mastic around a window or door seals the gap between the frame and the wall. Once that seal fails, wind and rain find the gap. Our applicators cut it out and replace it with a flexible, weatherproof sealant. We work on uPVC windows, patio & French doors and timber windows & doors, and the jobs we see most are cold air getting in at the frame edge and cracked internal joints between frame and plaster.
Houses in smaller places like Onslow Village can stand more in the open than those in a built-up town. That is hard on the mastic around frames and sills.
The work is covered for a year after we finish. If there’s a problem with it, please ring 0345 464 0079 or email us.
- Location
- Onslow Village (GU2, GU3)
- Wider area
- Surrey
- Cover
- 12 months on all our work
- Quote
- A clear price before any work starts
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
Looking after it afterwards
Simple care keeps the joints in good condition. Our advice:
- Keep jet washers away from the mastic
- Keep solvents and bleach off the sealant
- Check the mastic once a year
- Paint up to the joint, not over it
Wipe the frames with soapy water when you clean the windows, and avoid solvent cleaners on the sealant.
A failed joint lets water into the wall a little at a time. Often the first sign is a damp patch inside or flaking paint on the reveal. Early resealing stops it reaching that point.
Also in Onslow Village
When to call us in Onslow Village
Water runs down the glass onto the sill, and the ends of the sill, where it meets the wall, are where it gets in. When that sealant fails, water gets into the wall or under the frame.
Most people get in touch after spotting something like this:
- Gaps left after new windows were fitted
- Rain getting in at the frame or under the sill
- Cracked sealant at the sill ends
- Mastic that’s falling out in pieces
If you let a flat or house near Guildford station, cracked frame mastic tends to show up as a draught or damp complaint, so it’s worth checking between lets.
Before booking anyone
- What preparation is included
- How the colour is chosen
- What happens if the job turns out different
- How long the guarantee is
DIY sealant or a professional job?
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.
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. Everything old must be removed first.
Honest limits
We will not take on work that won’t last, so here’s what sealant cannot put right:
- Soft or decayed wood in the frame
- Damp problems in the wall away from the window
- Worn gaskets, brush seals or a door that has dropped
If you are not sure, just ring 0345 464 0079 or send us an email and we will give you a straight answer before booking.
Joints and surfaces we work on
- Window sills
- Composite doors
- Timber windows & doors
- Aluminium frames
- Patio & French doors
- uPVC windows
Onslow Village: your questions answered
Is Onslow Village within the area you cover?
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.
Is Onslow Village in your area for window mastic?
Yes, Onslow Village is within the area we cover. We work across London and the South East. You can phone 0345 464 0079 or send us an email and tell us what needs doing.
How long does it take to reseal the windows on a house?
It depends on access, the old mastic and the size of the frames. You’ll know the timing when we quote.
Will you leave a mess?
No. The area is protected while we work and cleaned up afterwards.
Are you an approved applicator?
Yes. Mr Mastic is an ARBOMaster approved applicator.
Can new sealant go over the old?
No. The old sealant always comes out first, so the new sealant bonds properly.
Do you work on first-floor windows?
Yes, as long as they can be reached safely. Tell us about access when you get in touch and we’ll plan for it.
How long before the joint can be used?
That depends on the sealant used, so follow the cure time we give you.
What affects the cost of window mastic
Call for a quick quote. The main things that affect it are:
- How easy the joints are to reach
- Whether there’s mould to deal with
- Which sealant suits the joint
- How much old sealant there is and how hard it is to remove
A few things move the cost up or down: the old material and how easily it comes out, whether mould needs treating, and whether the work is at height. We take all of that into account in your quote.
Asking for a quote
To make quoting easier, please include:
- If someone has resealed it before
- What’s wrong with the joints now
- Any access issues, like height or stairs
- The rough size of the job
Want a quote for window mastic? Please phone 0345 464 0079 or email us with a few details. You’ll know what we plan to do, and what it will cost, before any work begins.
What window mastic looks like in Onslow Village
Rainfall in the South East is lower than in much of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day. With historic houses such as Guildford Castle (about 1.3 miles east) nearby, there’s older building stock in the area around Onslow Village 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’s traditional sand mastic.
Homes close to All Saints' Church include some older properties, and the windows may be timber, sash or later replacements, and each needs the right sealant against the wall. For site and facilities teams at buildings such as Onslow Infant School, larger buildings have plenty of frames, and the mastic around each one ages.
Onslow Village is about 2 miles south-west of Guildford, in Surrey. From the centre of Onslow Village to the outskirts, window mastic is available for homes and businesses alike, from flats and houses to offices and hotels. Our area takes in 395 places across Surrey, large and small. Crawley is on our list too, about 20 miles from Onslow Village.
We work across the GU2 and GU3 postcode area for window mastic. Whether your property is on Gill Avenue, Farnham Road and Orchard Road or anywhere close by, our applicators can take on the job. Onslow Village is on the A31, so it’s easy for us to get to with everything needed for window mastic. If you’re just outside Onslow Village, we cover Littleton (1 mile south), Wood Street Village (2 miles north-west), Compton (2 miles south-west), Binscombe (2 miles south) and Fairlands (2 miles north). Further out, we also cover Woking (6 miles north), Camberley (9 miles north-west), Farnham (9 miles west), Egham (14 miles north), Walton-on-Thames (13 miles north-east) and Dorking (12 miles east).
What’s near Onslow Village
In Onslow Village, that means homes and buildings near Guildford County School, Academy of Contemporary Music and Broadstreet. The nearest railway station is Guildford station, roughly 1 mile east of the centre. A little further out are Guildford Castle (1.3 miles east) and Guildford Cathedral Treasury (0.7 miles north-east). Green spaces nearby include Pewley Down and Lower Lake.
How it works
When we arrive, we look over the joints with you first, so there are no surprises. We protect the surfaces around the joints before any work begins. Most jobs take a few hours for a few frames, or a day or more for a whole house. For a job in Onslow Village, we agree the time, the access and parking before the day. If the work is outside, the weather plays a part, as sealant needs a dry surface.
- First, we go round the frames with you and agree the list.
- We remove the old mastic and clean the frame edge and wall.
- 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.
Preparing for the visit
- Mention any sign-in or site rules at work premises
- Mention any tricky access
- Clear items away from the joints we’re working on
Ask for a quote
For a quick quote, get us on the phone, or email us if that’s easier. Describe what needs sealing and we’ll talk you through the work before giving you a price.
Read more
Work for landlords, hotels and businesses
In hotels, rooms out of use cost money, so the work can be planned room by room. We have worked in hotels as well as homes and businesses.
For anyone letting property in or around Onslow Village, several properties can be quoted together. Just tell us the addresses and what each one needs.