Kent · England
Hersden Window Mastic
Window mastic across Hersden and nearby, with every bit of old sealant taken out first and a one-year guarantee.
- Draughts coming in around windows and doors
- Cracked internal joints between frame and plaster
- A bead that doesn’t match the frame
How we handle window mastic in Hersden
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 are often asked to deal with gaps left after new windows were fitted and hard, cracked sealant around windows, on patio & French doors, composite doors and aluminium frames.
Many houses in smaller places like Hersden have conservatories, garden rooms or patio doors. Their glazing joints and frame seals are as much a part of the job as the windows.
A 12-month guarantee comes as standard.
- Location
- Hersden (CT3)
- Region
- Kent
- Cover
- A year, on every job
- Quote
- A clear price before any work starts
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
Looking after it afterwards
Good habits help new joints last longer. A few tips:
- Keep timber frames painted
- Avoid harsh chemicals near the mastic
- Don’t aim a pressure washer at the joints
- Wipe condensation off the frames
On timber frames, keep the paintwork in good order, since wood that gets wet swells and shrinks more. Paint up to the joint, not over the silicone.
Signs to watch for: split or missing mastic, gaps, damp patches inside or black mould on the reveal. Any of these is worth a call.
Hersden: your questions answered
Is Hersden in your area for window mastic?
Yes, Hersden is within the area we cover. We work across London and the South East. You can ring 0345 464 0079 or send us an email and let us know what needs doing.
Will you come out to Hersden?
Yes, smaller places are covered as well as towns. We work across London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
What should I tell you?
Let us know what needs doing and where, plus photos if you have them. We will ask anything else we need to know.
Do I need to be at home?
It depends on the job. For work indoors, someone needs to let us in, and for outside work we will agree access with you when we book.
Can I do it myself?
You can, for simple jobs. Preparation is everything: all the old sealant out, and a clean, dry joint. If it does not work out, we can redo it.
Are you fully insured?
Yes. We are fully insured.
Do you hold any approvals?
Yes. We’re an ARBOMaster approved applicator.
Will there be a smell?
It depends on the product. Some products have a noticeable smell, others very little.
Quotes for window mastic in Hersden
Your quote is based on your job. We look at:
- Whether old sealant or filler has to be cut out
- The size of the job
- How easy the joints are to reach
- How many rooms, windows or areas are involved
Combining jobs into one visit usually makes better use of the time than several visits, so tell us about everything that needs sealing. We’ll give you a clear quote for the lot.
Helping us quote
To make quoting easier, let us know:
- Whether it has been sealed before
- Photos by email, if that’s easy
- What the problem is, such as mould, gaps, leaks or cracking
- Where the job is, and your postcode
Asking for a quote is easy: let us know what needs doing and where. A few pictures by email make the job easier to understand, and we will come back to you with a quote.
How it works
Before we leave, we go over the finished joints with you and explain the cure time. The work normally takes a few hours for a handful of frames, longer for a whole house, depending on the size of the job. Parking around Hersden is generally easier than in a town centre, but mention any lanes, gates or long drives. For outside work, side access and the height of the joints help us plan.
- We start by checking each window and door with you.
- 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.
- New exterior sealant goes on in a matching colour and is tooled smooth.
- We clear up and check every joint is fully closed.
Preparing for the visit
- Try not to wet indoor joints just before the visit
- Let us know about stairs, lifts or work at height
- Keep children and pets away from the work area
How to get a quote
Call for a quick quote, or send an email if you’d rather. Tell us about the joints that need doing and we’ll explain what’s involved and give you a clear price.
Advice
Also near Hersden
What else we do in Hersden
When something else is needed
In fairness, there are a few things sealant won’t fix:
- Worn gaskets, brush seals or a door that has dropped
- Faulty window hardware
- Condensation trapped between the panes
If you are not sure, just phone 0345 464 0079 or send us an email and we will give you a straight answer before booking.
Where we work in Hersden
- Aluminium frames
- Window sills
- Composite doors
- Patio & French doors
- Timber windows & doors
- uPVC windows
What happens if it’s left?
Failed mastic is not a reason to replace sound windows. If the frames and glass are in good order, resealing the joints is often all that is needed. Problems with the glass or gaskets are for a window company, and we will say so. Around Hersden, water from a failed joint in an older home can soak into timber and plaster, and that is a much bigger job than renewing the sealant.
Every job is a little different, so each one gets its own quote. The number of joints, how easy they are to reach and the sealant needed all make a difference.
Why us?
- Quality sealants from Arbo and Everbuild
- A choice of colours where the product allows
- Every job guaranteed for a year
- Neat joints and a tidy finish
Can I do it myself?
If you do try it yourself, take your time over the preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it fails, we can still redo it.
The difference is mostly in the preparation and the product. We take joints back to clean, dry surfaces, and the sealant is chosen for how the joint moves and where it is.
Landlords, agents and businesses in Hersden
From a single let to a portfolio, the work is the same standard: the old material taken out, careful preparation and a 12-month guarantee.
We regularly work with letting and managing agents. Send the address, what’s needed and the access arrangements.
Windows and doors in Hersden
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.
For an older house near a landmark such as Church of All Saints, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall. For landlords with property near Sturry 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 Hersden Village Primary School, its window and door frames need their mastic kept sound, just like a home’s.
Hersden is about 4 miles south of Herne Bay, in Kent. If you need window mastic in Hersden, it’s easy to get a quote: please phone 0345 464 0079 or drop us an email. We cover Kent from our Crawley base, Hersden included. 922 places in Kent are on our list, from the larger towns to small villages. We also work in Chelmsford, around 41 miles away.
Every address in CT3 is within our area for window mastic. If you need window mastic at a property on The Firs, The Sycamores and Chequer Tree Close or anywhere close by, we can help. Neighbouring places we cover for window mastic include Westbere (1 mile south-west), Stodmarsh (1 mile south-east), Hoath (1 mile north), Knave's Ash (1 mile north) and Sturry (2 miles west). We also work in nearby towns such as Canterbury (4 miles south-west), Margate (11 miles north-east), Dover (14 miles south-east), Ramsgate (11 miles east), Broadstairs (12 miles east) and Whitstable (6 miles north-west).
Near you in Hersden
We work in homes and buildings around Frank Montgomery School, Spires Academy and Ye Olde Yew Tree Inn and the streets around them. For rail, the closest station is Sturry station, about 1.9 miles south-west. Well-known places in the area include Canterbury Castle (4.5 miles south-west) and St Martins Hospital (3.4 miles south-west). For a walk, there’s West Blean and Thornden Woods.