Oxfordshire · England
Window & door mastic in Horley, Oxfordshire
Mastic around window and door frames, sills and patio doors for Horley, backed by a one-year guarantee. Call for a quick quote.
- Mastic that is falling out in pieces
- Leaking joints at the ends of sills
- Water coming in at the bottom corners of a door
About our window mastic in Horley
Every window and door frame has a gap around it, and mastic is what closes it. Once that seal fails, wind and rain find the gap. The old mastic is removed and the joint resealed with a flexible exterior sealant. We work on window sills, composite doors and uPVC windows, and the jobs we see most are black, perished sealant on frames and sealant in the wrong colour for the frame.
Somewhere as small as Horley, older homes often have timber frames set in stone or brickwork. Older buildings like these don’t always suit modern silicone, and sometimes a traditional sand mastic is the better choice.
All our work is covered by our 12-month guarantee.
- Where
- Horley (OX15)
- Region
- Oxfordshire
- Cover
- A year, on every job
- Quote
- A clear price before any work starts
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
Looking after it afterwards
How long the joints last depends on use and care. Here’s what we suggest:
- Keep paint off silicone joints
- Don’t aim a pressure washer at the joints
- Use gentle cleaners on frames and sealant
- Air rooms to keep condensation down around windows
Keep sill grooves and drainage slots clear, so rain drains out rather than building up at the sealant.
A small gap around a frame only grows. As the old mastic shrinks further, more air gets through, and heat escapes around the frame. Resealing closes it.
For landlords and businesses
Failed sealant is one of the commonest items on a check-out report, and it’s quick to put right between tenancies. Several properties can go on one quote.
Letting agents often deal with us directly. Send the address, what’s needed and the access arrangements and we’ll give you a quote.
Do you need window mastic in Horley?
Plenty of failed mastic was poorly applied in the first place. Sealant run over dust, wet brick or loose mortar never bonded as it should, and it lets go sooner than it should.
Common reasons people contact us include:
- Mastic that is falling out in pieces
- Draughts coming in around windows and doors
- Cracked or shrunken mastic around the frame
- Leaking joints at the ends of sills
For landlords with property near Banbury station, cracked frame mastic tends to show up as a draught or damp complaint, so it’s worth checking between lets.
What your quote should include
- The length of the guarantee
- Which sealant they’ll use, and why
- Whether you can choose the colour
- What the quote includes, VAT included or not
Why deal with it now?
Choosing the product is half the job. Decorators’ caulk and bathroom silicone aren’t designed for outside joints that move. An exterior, low-modulus sealant stays flexible in sun and frost. In a small place like Horley, homes can be exposed to wind and rain, which finds any gap, and damp in older walls is slow to dry out.
Commercial jobs are quoted on the same basis as homes: how much there is to do, how we reach it and what it needs, plus any working-time requirements on site. Call for a quick quote and we will go through it with you.
Why choose Mr Mastic in Horley
- Domestic, commercial and hotel work
- Trusted Arbo and Everbuild sealants
- White, clear, grey or coloured to suit, where the product allows
- Anti-fungal sanitary silicone in wet areas
Read our cost guide and our reviews.
How the visit works
You don’t need to clear the whole room or building, just the space around the work. We protect the rest, and the job takes anything from an hour or two to a full day, depending on how many frames there are in most cases. Somewhere like Horley 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 check each frame and agree which ones need doing.
- Next the failed sealant is cut away and the joint cleaned.
- 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
- Let us know about stairs, lifts or work at height
- Mention if the joints have been sealed before
- Keep pets and children clear of the area while we work
Ask for a quote
For a quote, phone 0345 464 0079 or send us an email with the location and a short description of the problem. You will have a clear quote before work begins.
Related advice
More services for Horley
Frames and glazing around Horley
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. Historic houses like Upton House (about 3.2 miles west) are a reminder that the area around Horley has older buildings as well as new. Where a home is older, older timber frames in brick or stone need a different approach from a modern uPVC window.
Homes close to Church of St Ethelreda include some older properties, and the windows may be timber, sash or later replacements, and each needs the right sealant against the wall. If you look after a building such as North Oxfordshire Academy, larger buildings have plenty of frames, and the mastic around each one ages.
Horley is about 3 miles north-west of Banbury, in Oxfordshire. Horley gets the same service as everywhere we cover: old sealant removed completely, careful preparation and a 12-month guarantee. Horley is one of 443 places in Oxfordshire where we work for window mastic. Our Oxford page covers work nearby, about 25 miles away.
We work across the OX15 postcode area for window mastic and the streets around it. You will find streets such as Manor Orchard and Little Lane. We also cover the places around Horley: Wroxton (1 mile south), Drayton (2 miles south-east), Neithrop (3 miles south-east) and Ruscote (3 miles south-east). Larger places within reach include 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).
Around Horley
In Horley, that means homes and buildings near Red Lion pub, among other places. Horley’s nearest station is Banbury station, about 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). For a walk, there’s Crouch Hill.
When something else is needed
Honest advice matters more to us than a booking, so here’s what new sealant won’t do:
- Worn gaskets, brush seals or a door that has dropped
- A frame that has rotted at the joint
- Penetrating damp from a failed cavity tray or render
If you are not sure, just call 0345 464 0079 or send us an email and we’ll give you a straight answer before booking.
Where we work in Horley
- Timber windows & doors
- Aluminium frames
- uPVC windows
- Patio & French doors
- Composite doors
- Window sills
How we quote for window mastic
Some jobs are bigger than they look, and some smaller. What affects the quote:
- Any mould that needs treating
- Working hours on commercial sites
- The old material and how stubborn it is
- How many rooms, windows or areas are involved
What it costs depends on how much there is to do, how much old material has to come out and access to the work. We give a clear quote before any work starts, so you know where you stand.
What we need to know
You don’t need to know the technical terms. It helps if you can tell us:
- If it’s domestic, commercial or a hotel
- Whether it has been sealed before
- A few pictures by email, if you can
- The address or postcode of the job
There’s no standard price list, because every job is different. Instead, your job gets its own clear quote. To get started, ring 0345 464 0079 or send us an email.
Your questions about window mastic in Horley
Is Horley within the area you cover?
Yes, we do. We work across London and the South East, from towns to the smallest places. The journey is planned ahead, so it helps to know about access.
Do you cover Horley for window mastic?
Yes. We work across London and the South East, and Horley is part of that. Just phone 0345 464 0079 or drop us an email with a few details of the job.
Are you fully insured?
Yes, we are fully insured for domestic and commercial work.
How much does window mastic cost in Horley?
There’s no set price, as it depends on the job: its size, the old material, access and the product needed. We agree the price before any work begins.
Can I do it myself?
For a simple, easy-to-reach joint, a careful DIYer can do a reasonable job. Most DIY failures come from sealing over old material, wet joints or too much sealant.
Are you ARBOMaster approved?
Yes. Mr Mastic is an ARBOMaster approved applicator.
Do you take out the old sealant first?
Yes, every time. New sealant won’t bond properly to old, so the joint is cleaned back first.
What sealant do you use?
We choose the sealant for the joint, not the other way round. Movement, water and weather all affect the choice.