Surrey · England
Window & door mastic in Fernhill, Surrey
Window and door frames in Fernhill need attention? We remove the old material, prepare the joints and seal them properly, and the work is guaranteed for a year.
- Gaps where the sill meets the wall
- Mastic that has split away from the wall
- A bead that does not match the frame
Common problems we fix in Fernhill
Some failures date back to when the windows were fitted. Mastic laid onto dusty, damp or crumbling surfaces never bonded as it should, so it comes away long before its time.
Any of these means the joints need attention:
- Damp patches on the reveal after heavy rain
- Cracked sealant at the sill ends
- Draughty joints inside around the window
- Gaps left after new windows were fitted
If you live in an older home near Church of St Bartholomew, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
Comparing quotes
- Whether they’re fully insured
- How long the guarantee is
- What preparation is included
- Is VAT in the price?
Window mastic for homes and businesses in Fernhill
A window frame and the wall around it expand and shrink at different rates. Plastic and aluminium frames move with the temperature, while masonry stays fairly still. So the sealant has to stretch and recover, which is why we use a low-modulus product. We work on patio & French doors, window sills and uPVC windows, and common reasons people get in touch are rushed sealant from a window installation and water coming in at the bottom corners of a door.
Around Fernhill, many homes face open ground, so their windows and doors take the full weather. That exposure dries out and cracks the mastic around frames and sills faster.
The work is covered for a year after we finish. If anything is not right with it, ring 0345 464 0079 or send us an email.
- Place
- Fernhill (RH6)
- Wider area
- Surrey
- Guarantee
- 12 months on all our work
- Price
- A clear quote up front
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
More services for Fernhill
Keeping the joints in good condition
Simple care keeps the joints in good condition. Our advice:
- Avoid blasting the frames with a pressure washer
- Make sure the drainage slots aren’t blocked
- Repaint timber before it’s bare
- Ventilate rooms so frames don’t stay wet inside
Silicone can’t usually be painted, so if you are planning to paint the frames or walls, tell us beforehand. We can use a paintable sealant where that matters.
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.
When it isn’t the sealant
Before booking, it’s worth knowing the limits too:
- Damp problems in the wall away from the window
- Faulty window hardware
- A door that needs adjusting, rehanging or new seals
Not sure which it is? You can ring 0345 464 0079 or send us an email and we will tell you honestly before you book.
Joints and surfaces we work on
- Window sills
- Aluminium frames
- uPVC windows
- Patio & French doors
- Timber windows & doors
- Composite doors
What happens on the day
On the day, we look over the joints with you first, so you know exactly what we are doing. Surfaces next to the work are protected before work begins. The work generally takes a few hours for a handful of frames, longer for a whole house. In a small place like Fernhill, access is generally the main thing to plan. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- First we look at every frame and agree the list.
- 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.
- We clear up and check every joint is fully closed.
Getting ready for the visit
- Mention any leaks or damp you’ve noticed
- Try not to wet indoor joints just before the visit
- On commercial sites, let us know about site rules
How to get a quote
For a quote, phone 0345 464 0079 or drop us an email and tell us where the job is and what the problem looks like. You’ll have a clear quote before work begins.
Read more
What window mastic looks like in Fernhill
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.
For landlords with property near Gatwick Airport station, sound mastic around windows and doors keeps out the draughts and damp that tenants notice first. For site and facilities teams at buildings such as Oakwood School, its window and door frames need their mastic kept sound, just like a home’s.
Fernhill is about 2 miles south-east of Horley, in Surrey. If you need window mastic in Fernhill, it’s easy to get a quote: please ring 0345 464 0079 or email us. We cover Surrey from our Crawley base. We cover 395 towns and villages across Surrey, large and small.
Our applicators cover all of RH6 for window mastic and the streets around it. Streets in the area include Peeks Brook Lane and Donkey Lane, and we cover them all. Nearby, we also carry out window mastic in Burstow (1 mile east), Shipley Bridge (1 mile south), Tinsley Green (1 mile south-west), Keeper's Corner (1 mile east) and Copthorne (1 mile south). Larger places within reach include Epsom (14 miles north-west), Redhill (6 miles north), Ewell (15 miles north), Reigate (6 miles north-west), Caterham (9 miles north) and Dorking (10 miles north-west).
Near you in Fernhill
In Fernhill, that means homes and buildings near The Shipley Bridge pub, among other places. Fernhill’s nearest station is Gatwick Airport station, roughly 1 mile west. Well-known places in the area include County Mall (3.6 miles south-west) and Langley Green Hospital (2.9 miles south-west). Open spaces near Fernhill include Hedgecourt Lake.
What affects the cost of window mastic
Call for a quick quote. The main things that affect it are:
- How much old sealant there is and how hard it is to remove
- Which sealant suits the joint
- Whether the work is at height
- How many rooms, windows or areas are involved
Doing several joints on one visit is usually more efficient than separate visits, so tell us about everything that needs sealing. We’ll give you a clear price for the lot.
Asking for a quote
When you call or email, these details help:
- If it’s domestic, commercial or a hotel
- How many joints, rooms or windows are involved
- What the problem is, such as mould, gaps, leaks or cracking
- Any previous sealing or DIY work
The more we know about the job, the more useful the quote. Tell us where the job is, what’s wrong and how much there is, and email pictures if that’s easy.
How the job changes by surface
Timber windows & doors
Soft or rotten wood cannot be sealed successfully. If we find rot, we will tell you before going ahead, as a joiner will need to deal with it.
uPVC windows
We clean the frame edge carefully so the plastic isn’t marked, then the sealant goes in between frame and wall and tooled smooth.
DIY versus a professional finish
Not every job suits DIY: work at height, external movement joints, fire-rated sealant and large areas need the right product, the right access and the right method.
A DIY attempt doesn’t rule out a professional job. We remove it and do the joint properly.
Common questions in Fernhill
Can you do window mastic in Fernhill?
Yes. We work across London and the South East, and Fernhill is part of that. Just call 0345 464 0079 or email us with a few details of the job.
I let a flat near Gatwick Airport station. Can you help?
Yes, rental work is part of what we do. You can phone 0345 464 0079 or email us with the address and a few details, and we will give you a fixed price before work begins.
Are you insured?
Yes. Full insurance covers our work, and we can confirm the details when we quote.
Is it worth trying 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.
What do you need from me for a quote?
Just the basics: where it is, what you’ve noticed and how we reach it. After that, simply phone 0345 464 0079 or email us.
What do you put in the joint?
The product depends on the job: sanitary silicone where it gets wet, and sealants suited to movement or weather elsewhere. We use products from Arbo and Everbuild.
Is there any odour?
That depends on the sealant. Some products have a noticeable smell, others very little, and any smell fades as they cure.
How long will my window job take?
A few frames take a few hours, while a whole house takes longer. You will get a timescale with the quote.