Hertfordshire · England
Window & door mastic in Gravesend, Hertfordshire
Professional window mastic in and around Gravesend, with old sealant always removed completely and a 12-month guarantee.
- Draughts coming in around windows and doors
- Untidy mastic left by window fitters
- Cracked or shrunken mastic around the frame
What we do, step by step
The work is kept neat and contained to the joints we are treating, so you can carry on as normal. Expect the work to take a morning for a couple of windows and a door. In a small place like Gravesend, access is usually the main thing to plan. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- First, we go round the frames with you and agree the list.
- We remove the old mastic and clean the frame edge and wall.
- Where the gap is deep, backing rod goes in first.
- The new sealant goes on in white, brown, anthracite grey, black or clear to suit.
- Every joint is tooled smooth and checked before we leave.
Preparing for the visit
- Plan for the work area to be out of bounds to pets and children
- Mention any tricky access
- Let us know if you’ve seen damp or leaks
How to get a quote
There’s no standard price list, as no two jobs are quite the same. Instead, we send you a clear quote for your job. To arrange one, phone 0345 464 0079 or send us an email.
Related advice
Window mastic in Gravesend
The new joint doesn’t have to be white. White, brown, anthracite grey, black and clear sealants are all available, so the line suits the frame instead of standing out. If you have rushed sealant from a window installation and cracked sealant at the sill ends, we can put it right, whatever the surface.
Outdoor sealant needs dry, clean surfaces, so work on frames around Gravesend is planned for dry weather. Tell us about access to every side of the house, including upper-floor windows.
We stand behind the work with a one-year guarantee, so you’re covered after we have gone.
- Where
- Gravesend (SG11)
- Region
- Hertfordshire
- Cover
- 12 months on all our work
- Quotes
- A clear quote up front
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
Questions from Gravesend
Can you do window mastic in Gravesend?
Yes, Gravesend is within the area we cover. Our work covers London and the South East. Just ring 0345 464 0079 or send us an email with a few details of the job, and we’ll give you a clear quote.
Do you cover smaller places like Gravesend?
Yes. Gravesend is within the area we cover, which takes in towns, villages and rural addresses. Our work covers London and the South East. Just mention lanes, gates or anything else about the route when you book.
Do you seal inside as well as outside?
Yes. Plenty of draughts come through the inside joint as well as the outside, so it can be worth sealing both.
How much does window mastic cost in Gravesend?
Size, access and the old material all affect the cost. Call for a quick quote.
Can new sealant go over the old?
No, and we never do. It may look fine at first, but the new bead soon lifts. The old sealant has to come out completely.
Can you do upstairs windows?
Yes, if safe access is possible. For high or awkward windows, we will tell you what access is needed.
Does someone need to be in?
We need access to the joints, so we will agree that with you when we book. Indoors, that generally means someone at home.
Do you remove the old sealant?
Yes, every time. New silicone doesn’t stick to old silicone, so the joint is cleaned back first.
Window mastic in Gravesend: local notes
With historic houses such as Much Hadham Palace (about 3.6 miles south) nearby, there’s older building stock in the area around Gravesend 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. 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.
If you live in an older home near Church of St Mary, frames set in older brick or stone need a sealant that suits the wall as well as the frame. Schools such as Albury Church of England Voluntary Aided Primary School are buildings too, and the mastic around its windows and doors needs looking after like any other building’s.
Gravesend is about 4 miles north-west of Bishop's Stortford, in Hertfordshire. Across the SG11 area, our applicators can take on window mastic. We cover 381 towns and villages across Hertfordshire, large and small. There’s also a page for Chelmsford, about 21 miles away.
We cover every part of SG11 for window mastic. Other places close to Gravesend include Albury (1 mile west), Clapgate (1 mile south-east), Furneux Pelham (2 miles north), Braughing (3 miles west) and Hay Street (3 miles west). Within a short drive, we also cover Stevenage (12 miles west), Bishop's Stortford (4 miles south-east), Welwyn Garden City (14 miles south-west), Hoddesdon (12 miles south-west), Cheshunt (15 miles south-west) and Hertford (11 miles south-west).
Around Gravesend
Locally, jobs take us to homes and businesses close to The Catherine Wheel pub. The closest station to Gravesend is Bishops Stortford station, roughly 4.2 miles south-east. Other landmarks nearby include Herts and Essex Hospital (4.6 miles south-east) and Bishops Stortford Local History Museum (3.1 miles south-east).
Should I try it myself first?
Sealing over old silicone is the commonest DIY error. Silicone does not stick to old silicone, so it peels away and traps moisture behind it. Everything old must be removed first.
What a professional job adds is preparation and the right product. We take joints back to clean, dry surfaces, and the sealant is matched to the joint and its conditions, and the work is guaranteed for a year.
Places near Gravesend
More services for Gravesend
Looking after it afterwards
Once the sealant has cured, a few habits help it last:
- Do not paint over the silicone
- Repaint timber before it’s bare
- Look round the frames every year or so
- Use gentle cleaners on frames and sealant
A yearly look round the frames is enough. Small splits are simple to catch before they leak, and if anything looks wrong, just ring 0345 464 0079 or email us.
A small gap around a frame only grows. As the old mastic shrinks further, more air gets through, and a cold room gets colder. Resealing closes it.
Work for landlords, hotels and businesses
Businesses can book us for washrooms, kitchens, offices and more. On commercial sites, working times can be discussed when we quote.
Letting agents and landlords in Gravesend can book us as well as householders. Resealing between tenancies is a simple way to keep a property in good order.
Signs you need window mastic in Gravesend
On timber frames, paint and putty build up around the joint. Mastic painted over many times cracks with the paint, and timber moves with moisture as well as temperature.
If you can see any of these, it’s time to have the joints looked at:
- Cracked internal joints between frame and plaster
- Mastic that is falling out in pieces
- Gaps where the sill meets the wall
- Rushed sealant from a window installation
Letting a property close to Bishops Stortford station? Then renewing tired window mastic between tenants heads off draught and damp complaints.
Before you book anyone
- Is the old sealant removed completely?
- How the joint is cleaned and prepared
- When the joint can take water or movement
- What happens if they find a problem under the old sealant
Why deal with it now?
A quick bead over the top of old mastic looks like an easy fix, but new sealant can’t bond to old, crumbling mastic. It soon lifts and the leak carries on behind it. Proper resealing starts with removing the old joint. Around Gravesend, older homes often have timber in their floors and frames, where water from a failed joint can cause rot if it’s left.
A few things move the cost up or down: the old material and how easily it comes out, whether mould needs treating, and whether we need extra access for height. Your quote takes all of that into account.
Why book with us
- A choice of colours where the product allows
- We never seal over old sealant
- We’re fully insured
- 180+ five-star Google reviews
Take a look at what affects the cost or our reviews.
What we cannot put right
New sealant can’t fix everything, and we’ll tell you before any work starts. It won’t solve:
- Rotten timber, which needs a joiner first
- Misting between the panes of a double-glazed unit (that needs a new unit)
- Damp problems in the wall away from the window
If in doubt, ring 0345 464 0079 or email us and we will say what we think before booking.
Surfaces we seal
- Aluminium frames
- Window sills
- Timber windows & doors
- Patio & French doors
- uPVC windows
- Composite doors