Oxfordshire · England
Sand Mastic in Islip
Sand mastic for Islip and the surrounding area: careful preparation, the right product and tidy work. Ask us for a quick quote.
- Draughts and rain around sash boxes
- Cement or filler used on old window joints that has cracked
- Window mastic to renew ahead of painting
Sand mastic in Islip
Sand mastic doesn’t last for ever, leaving gaps round the window. Renewing it closes the gap so the surround looks right again. If you’re dealing with open joints round the window box and mastic round period door frames that has failed, we can put it right, whatever the surface.
Homes in small places like Islip often stand in the open, with little to shelter their windows from wind and rain. Exposed frames and sills lose their mastic sooner than sheltered ones.
All our work is covered by our 12-month guarantee.
- Location
- Islip (OX5)
- Wider area
- Oxfordshire
- Guarantee
- 12 months on all our work
- Price
- Quoted before any work starts
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
FAQs for Islip
Can you do sand mastic in Islip?
Yes. Our work covers London and the South East, and Islip is part of that. You can call 0345 464 0079 or drop us an email and tell us what needs doing, and we’ll give you a clear price.
Will you come out to Islip?
Yes, we do. We work across London and the South East, and smaller places are part of that. Longer journeys are simply planned in advance.
Can I add another job to the visit?
Yes. Several rooms, windows or areas can go on one quote.
Is sand mastic better than silicone for my windows?
For period timber windows in stone or brick, sand mastic is often the better fit. On modern frames, we’d normally use a flexible sealant, and we’ll explain why.
Are you an approved applicator?
Yes. We’re an ARBOMaster approved applicator, which is run for the Arbo sealant brand.
Should I check with the council before work on a listed or conservation-area home?
Check with your local planning authority. They decide whether consent is needed.
Can new sealant go over the old?
No. New silicone will not bond to old silicone, and anything trapped underneath, including mould and water, stays there. We remove it all first.
Can you replace silicone on a period window with sand mastic?
Often, yes. Once the silicone is out and the joint prepared, sand mastic is applied by hand.
Landlords, agents and businesses in Islip
We work for letting agents and landlords as well as householders. Sealant work between tenants keeps a property looking cared for before the next move-in.
If you manage several properties in or around Islip, jobs at different addresses can go on one quote. Send us the addresses and the work at each.
Why deal with it now?
A silicone bead can be quicker, but it can look wrong on a period surround. Sand mastic is the traditional material and finishes neatly against the masonry. Older cottages and farmhouses around Islip can have timber floors and frames, where water from a failed joint can cause rot if it’s left.
Commercial jobs are quoted on the same basis as homes: the amount of work, the access and the products needed, plus any working-time requirements on site. Ask us for a quote and we’ll explain what it covers.
Why book with us
- Over 20 years’ experience
- Neat joints and a tidy finish
- 180+ five-star Google reviews
- We never seal over old sealant
See how sealant jobs are priced and our reviews.
When something else is needed
Before you book, it’s worth knowing the limits:
- Decisions on consent for listed homes
- Timber that has rotted
- Broken panes
If you’re not sure, just call 0345 464 0079 or send us an email and we’ll give you a straight answer before booking.
Joints and surfaces we work on
- Timber door frames
- Tenement windows
- Brick reveals
- Stone surrounds
- Sash and case windows
- Period & listed homes
What we’re called out for in Islip
Shallow joints are a common cause. A thin layer doesn’t hold well so we make sure the new mastic is the right thickness.
Keep an eye out for any of the following:
- Draughty sash windows at the surround
- Failed mastic on an exposed elevation
- Crumbling sand mastic round a window
- Silicone on a period window that looks wrong
Rented homes near Islip station change hands often, and cracked sand mastic around sash windows lets in the draughts tenants complain about.
Comparing quotes
- Which sealant they’ll use, and why
- Whether they’re fully insured
- Which colour the sealant will be
- How long the guarantee is
Nearby places to Islip
Also in Islip
DIY sealant or a professional job?
The difference is mostly in the preparation and the product. Joints are cleaned back to sound surfaces and dried, and the sealant is matched to the joint and its conditions, and the work is guaranteed for a year.
Sealing over old silicone is the commonest DIY error. New silicone will not bond to old, so it peels away and traps moisture behind it. Everything old must be removed first.
What the job involves on each surface
Sash and case windows
The mastic round a sash window is on show so we finish it carefully.
Tenement and terrace windows
In shared buildings, the windows may be part of a wider repair so it’s worth checking responsibilities.
What happens on the day
You do not need to clear the whole room or building before we come, just the space around the work. We protect the rest, and the work takes a few hours for a single window, longer for several in most cases. Somewhere as small as Islip, access is often the only tricky part. For outside work, also let us know about exposed walls and any outbuildings involved.
- We check the window surrounds and agree which joints need renewing.
- Old, loose mastic is raked out and the joint cleaned.
- Deep voids are packed so the mastic is the right thickness.
- The mastic is mixed, pressed into the joint by hand and shaped.
- The mastic is finished to sit tidily against the stone or brick.
Preparing for the visit
- Tell us about access, such as stairs, a lift or high-level joints
- Where the joints are inside, avoid wetting them before we arrive
- Tell us about any water getting in
Getting a quote
Quotes start with a quick conversation. Describe the problem, the location and the size of the job, and we’ll talk you through what we’d do. When it suits you, ring 0345 464 0079 or send us an email.
Advice
What sand mastic looks like in Islip
With historic houses such as Holywell Manor (about 4.6 miles south) nearby, there’s older building stock in the area around Islip 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. Compared with the north and west, the South East gets less rain, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
For an older house near a landmark such as St Nicholas' Church, frames set in older brick or stone need a sealant that suits the wall as well as the frame. Schools such as Dr South's Church of England Primary School are buildings too, and its window and door frames need their mastic kept sound, just like a home’s.
Islip is about 5 miles north of Oxford, in Oxfordshire. Anywhere in OX5, our applicators can take on sand mastic. 443 places in Oxfordshire are on our list.
Every address in OX5 is covered for sand mastic, from the main roads to the quietest streets. Streets in the area include High Street, King's Head Lane and Middle Way, and we cover them all. Other places close to Islip include Gosford (2 miles south-west), Hampton Poyle (2 miles north-west), Kidlington (2 miles west), Bletchingdon (3 miles north-west) and Weston-on-the-Green (3 miles north). Larger places within reach include Oxford (5 miles south), Didcot (15 miles south), Bicester (6 miles north-east), Abingdon-on-Thames (10 miles south), Witney (11 miles west) and Thame (12 miles south-east).
Landmarks near Islip
Locally, jobs take us to homes and businesses close to The Red Lion Inn and Gosford Hill School, among other places. Islip has its own railway station: Islip station. A little further out are Churchill Hospital (4.1 miles south). The countryside around Islip includes Otmoor RSPB reserve and Headington Hill.