Oxfordshire · England
Sand mastic for sash & case windows in Horley, Oxfordshire
Professional sand mastic in and around Horley, with old sealant always removed completely.
- Gaps round a timber door in stone or brick
- Modern sealant on a period surround
- Draughts and rain around sash boxes
Sand mastic in Horley, done properly
We work across Horley renewing sand mastic on sash windows and doors. Each joint is raked out, prepared and pointed by hand, finished to suit the masonry. We’re often asked to deal with gaps between timber frames and stone or brick and modern sealant on a period surround, on tenement windows, sash and case windows and stone surrounds.
Somewhere as small as Horley, older homes often have timber frames set in stone or brickwork. Older buildings like these do not always suit modern silicone, so the sealant has to be chosen to suit the building.
We stand behind the work with a 12-month guarantee.
- Place
- Horley (OX15)
- Region
- Oxfordshire
- Guarantee
- A year, on every job
- Price
- A clear quote up front
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
Looking after it afterwards
After the cure time, these simple habits help:
- Avoid heavy scraping on the mastic joint
- Check the mastic when you check the paintwork
- Ask the planning authority about consent for listed or conservation-area homes
- Clear gutters so water does not pour onto the windows
Avoid sealing over the mastic with silicone. If anything cracks, get it looked at before trying a quick fix.
Renewing mastic before redecorating saves doing it twice. Painting over failed mastic hides the problem for a while.
Common questions in Horley
Will you come out to Horley?
Yes, we do. Our work covers London and the South East, from towns to the smallest places. The journey is planned ahead, so it helps to know about access.
I let a flat near Banbury station. Can you help?
Yes, landlords and agents are among the people we work for, and several properties can go on one quote. Just phone 0345 464 0079 or email us with the address and what needs doing, and we will send you a clear quote.
Is consent needed for window work on a listed home?
It’s best to ask your local planning authority first. Sand mastic is often favoured as like for like, but they decide.
Do you do commercial work?
Yes. Commercial and hotel work is a large part of what we do. Working times can be discussed when we quote.
Do I need to be at home?
For indoor joints, yes, someone needs to let us in. Once we have agreed the job, you don’t need to watch us work.
What is sand mastic?
A traditional pointing material made from sand and a linseed-oil-based binder, used between timber frames and stone or brick.
Are you an approved applicator?
Yes. We are an ARBOMaster approved applicator.
Is it OK to seal over old sealant?
No, because it fails. We remove every bit of old sealant first, so the new joint bonds to clean surfaces.
Surface by surface
Tenement and terrace windows
Tenements and terraces often have many sash windows with ageing mastic. We work on single windows or whole elevations.
Timber door frames
Door frames get knocked and soaked and the mastic can crack early. We rake it out and renew it.
Frames and glazing around Horley
With historic houses such as Upton House (about 3.2 miles west) nearby, there’s older building stock in the area around Horley as well as newer homes. In older buildings, older frames set in brick or stone need a sealant that suits them, and sometimes that is traditional sand mastic. 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.
If you live in an older home near Church of St Ethelreda, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint. For site and facilities teams at buildings such as North Oxfordshire Academy, larger buildings have plenty of frames, and the mastic around each one ages. Rented homes near Banbury station change hands often, and cracked sand mastic around sash windows lets in the draughts tenants complain about.
Horley is about 3 miles north-west of Banbury, in Oxfordshire. If you need sand mastic in Horley, please call 0345 464 0079 or email us for a quick quote. We are based in Crawley and cover Oxfordshire. Across Oxfordshire, we cover 443 places, Horley among them. We also work in Oxford, about 25 miles from Horley.
Our applicators cover all of OX15 for sand mastic and the streets around it. Local streets include Manor Orchard and Little Lane, all of which we cover. We also cover Wroxton (1 mile south), Drayton (2 miles south-east), Neithrop (3 miles south-east) and Ruscote (3 miles south-east). Further out, we also cover Banbury (3 miles south-east), Chipping Norton (12 miles south-west), Grimsbury (4 miles south-east), Bloxham (5 miles south), Bodicote (5 miles south-east) and Upper Heyford (13 miles south-east).
What’s near Horley
Around Horley, our work takes us to homes and buildings near Red Lion pub and the streets around them. The nearest railway station is Banbury station, roughly 3.5 miles south-east of the centre. Other landmarks nearby include Horton General Hospital (3.6 miles south-east) and Castle Quay Shopping Centre (3.2 miles south-east). Green spaces nearby include Crouch Hill.
What we do, step by step
We keep the work tidy and contained to the area we’re working on, so you can get on with your day. Expect the work to take a few hours per window, depending on the condition of the joints. Somewhere as small as Horley, access is often the only tricky part. For outside work, also let us know about exposed walls and any outbuildings involved.
- Each surround is checked first.
- We rake out the old mastic and clean the joint.
- We fill deep gaps so the new mastic isn’t too thick.
- We point the joint with sand mastic by hand.
- The finish is dressed neatly.
Before we arrive
- Let us know about parking restrictions
- Plan for the work area to be out of bounds to pets and children
- Tell us about any previous sealing or DIY attempts
Ask for a quote
For a quote, call 0345 464 0079 or send us an email with the location and a short description of the problem. We’ll give you a clear quote before any work starts.
Advice
DIY sealant or a professional job?
If you’ve already had a go yourself, that’s fine. We cut it out and start again, so tell us about it when you ask for a quote.
A careful DIYer can reseal a simple joint, such as a straightforward joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
What affects the cost of sand mastic
Some jobs are bigger than they look, and some smaller. What affects the quote:
- Which sealant suits the joint
- Whether there’s mould to deal with
- Any working-time requirements on site
- The old material and how stubborn it is
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 will go through it with you.
Helping us quote
There’s no need for technical detail. Just tell us:
- If it’s domestic, commercial or a hotel
- The address or postcode of the job
- Photos by email, if that is easy
- What the problem is, such as mould, gaps, leaks or cracking
There’s no standard price list, as no two jobs are quite the same. Instead, your job gets its own clear quote. To arrange one, ring 0345 464 0079 or email us.
What else we do in Horley
What sealant work cannot fix
To be straight with you, there are a few things sealant won’t fix:
- Whether work needs listed building consent
- Sashes that need overhauling
- Cracked or broken glass
If you’re not sure, just call 0345 464 0079 or email us and we will give you a straight answer before booking.
Where we work in Horley
- Tenement windows
- Stone surrounds
- Timber door frames
- Brick reveals
- Period & listed homes
- Sash and case windows
Landlord and commercial work in Horley
Landlords and letting agents in Horley can book us as well as householders. Resealing between tenancies keeps a property looking cared for before the next move-in.
Whether it’s one flat or a portfolio, you get the same standard of work: old sealant fully removed, joints prepared properly and a one-year guarantee.