Medway · England
Window & door mastic in Dunn Street, Medway
Mastic around window and door frames, sills and patio doors for homes and businesses in Dunn Street and across Medway. Fully insured, ARBOMaster approved and guaranteed for a year.
- Water coming in at the bottom corners of a door
- Sealant in the wrong colour for the frame
- Rushed sealant from a window installation
Window mastic in Dunn Street
From a single sill to a whole house of windows, the work is priced before anything is done. To get one, call 0345 464 0079 or send us an email with the number of frames and any access details for window mastic in Dunn Street. Common call-outs are for rain getting in at the frame or under the sill and a bead that doesn’t match the frame, on aluminium frames, window sills and uPVC windows.
Homes in small places like Dunn Street often stand in the open, with little to shelter their windows from wind and rain. That exposure dries out and cracks the mastic around frames and sills faster.
A one-year guarantee comes as standard, so you are covered after we have gone.
- Where
- Dunn Street (ME7)
- Wider area
- Medway
- Cover
- 12 months on all our work
- Quote
- A clear price before we start
- Call
- 0345 464 0079
- Updated
- 26 October 2026
Leave it or put it right?
A quick bead over the top of old mastic looks like an easy fix, but new sealant cannot bond to old, crumbling mastic. It soon lifts and the leak carries on behind it. The old mastic has to come out. Where a wall is exposed, as many are in small places like Dunn Street, wind-driven rain gets into any failed joint, and damp in older walls is slow to dry out.
Some things make a job bigger or smaller: the old material and how easily it comes out, whether mould needs treating, and whether we need extra access for height. We take all of that into account in your quote.
What you get with us
- An ARBOMaster approved applicator
- Homes, businesses and hotels
- Full insurance on every job
- Rated 4.9 stars on Google
Also near Dunn Street
Other services in Dunn Street
Landlords, agents and businesses in Dunn Street
Hotels need rooms back in use, so we plan the work room by room. Hotel work is part of what we do, alongside homes and businesses.
Letting agents often deal with us directly. Tell us the address, the job and how access works and we will give you a quote.
What the job involves on each surface
uPVC windows
Plastic frames move a lot between a hot afternoon and a cold night, so the joint needs a low-modulus sealant that stays flexible. We match white, brown, anthracite grey and black frames.
Timber windows & doors
Soft or rotten wood can’t be sealed successfully. We’ll point out any rot we find, as that is a job for a joiner.
What affects the quote in Dunn Street
Your quote is based on your job. We look at:
- Whether old sealant or filler has to be cut out
- Any mould that needs treating
- The number and length of the joints
- Any working-time requirements on site
Every job is a little different, so each one gets its own quote. Size, access and the product the joint needs all play a part, and we will explain the quote if you ask.
What we need to know
The more you tell us, the more accurate the quote. When you get in contact, it helps to mention:
- Any previous sealing or DIY work
- A few photos by email, if you can
- Whether it’s a home or a business
- What the problem is, such as mould, gaps, leaks or cracking
For a quick quote, get us on the phone, or email us if that is easier. Tell us about the joints that need doing and we will talk you through the work before giving you a price.
Questions from Dunn Street
Do you work for landlords with property near Rainham (Kent) station?
Yes, landlords and agents are among the people we work for. You can ring 0345 464 0079 or send us an email with the details for a clear quote.
Do you cover smaller places like Dunn Street?
Yes, Dunn Street is covered. Our work covers London and the South East, and smaller places are part of that. The journey is planned ahead, so it helps to know about access.
Will new mastic stop draughts?
Yes, where the draught is at the frame edge. We check where the draught is before work begins.
Can I paint over the new sealant?
Silicone generally will not take paint. If you plan to paint, tell us first and we can use a paintable sealant where it suits the joint.
Are you fully insured?
Yes. We’re fully insured, and we’ve been doing sealant work for more than 20 years.
Do you work on first-floor windows?
Generally, yes. Access is planned before work begins, so mention the height and anything in the way.
Where is Mr Mastic based?
Our base is in Crawley, West Sussex, and we work across South East England, London and Scotland.
Do you have sealant for grey or black windows?
Yes, in most cases. Tell us the frame colour when you get in touch and we’ll use the nearest match.
Common problems we fix in Dunn Street
Some failures date back to when the windows were fitted. Mastic laid onto dusty, damp or crumbling surfaces didn’t grip properly, and it lets go sooner than it should.
Common reasons people contact us are:
- Cracked sealant at the sill ends
- White mastic on grey or black frames
- Whistling draughts around closed windows
- Mastic that has split away from the wall
If you live in an older home near Church of St Peter, frames set in older brick or stone need a sealant that suits the wall as well as the frame.
What to look for in a quote
- Whether VAT is included
- Which sealant they’ll use, and why
- When the joint can take water or movement
- Which colour the sealant will be
Windows and doors in Dunn Street
Compared with the north and west, the South East gets less rain, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
Managing a site like Swingate Primary School? Then its window and door frames need their mastic kept sound, just like a home’s. Rented homes near Rainham (Kent) station change hands often, and renewing tired window mastic between tenants heads off draught and damp complaints.
Dunn Street is about 3 miles south-east of Chatham, in Medway. Dunn Street gets the same service as everywhere we cover: the old material taken out, joints prepared properly and a 12-month guarantee. Our area takes in 68 places across Medway, from the larger towns to small villages. Our Chelmsford page covers work nearby, about 29 miles away.
Work in ME7 works the same way as everywhere else we cover. We also cover Lidsing (1 mile north-west), Bredhurst (1 mile north-east), Scragged Oak (1 mile south-east), Kemsley Street (1 mile north-east) and Lower Cox Street (1 mile south-east). Further out, we also cover Gillingham (3 miles north), Chatham (3 miles north-west), Rochester (5 miles north-west), Rainham (3 miles north-east), Strood (6 miles north-west) and Luton (3 miles north-west).
Landmarks near Dunn Street
Around Dunn Street, our work takes us to homes and buildings near South Wood and The Harrow pub, among other places. The closest station to Dunn Street is Rainham (Kent) station, about 3.3 miles north-east of the centre. Nearby you will also find KIMS hospital (2.8 miles south) and Allington Castle (3.4 miles south-west). For a walk, there’s Boxley Hills and Burham Down.
Looking after it afterwards
Aftercare is simple, and it makes a real difference:
- Wash the frames with mild soapy water
- Keep jet washers away from the mastic
- Don’t paint over the silicone
- Check the mastic once a year
Clean the frames with mild soapy water, and avoid solvent cleaners on the sealant.
Leaks generally show up in wet, windy weather, but sealant goes on best when frames and walls are dry. Dealing with it when you first notice a crack avoids chasing leaks through the wet months.
What happens on the day
There’s no need to move everything out, just the space around the work. Everything nearby is protected, and the job takes most of a day for a typical house, less for a few frames for a typical job. In a small place like Dunn Street, access is normally 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.
- Deep gaps are filled with backing rod to set the depth.
- We apply a weatherproof sealant to match the frame and tool it neatly.
- Every joint is checked before we leave.
Getting ready for the visit
- Move anything stored near the joints
- Let us know about parking restrictions
- On commercial sites, let us know about site rules
Get a quote
We quote each job on its own, so the first step is telling us about yours. Simply phone 0345 464 0079 or drop us an email and describe the job, and photos are welcome.