Medway · England
Fenn Street Window Mastic
Mastic around window and door frames, sills and patio doors for homeowners, landlords and businesses in Fenn Street. ARBOMaster approved applicators, fully insured, with a 12-month guarantee.
- Black, perished sealant on frames
- Cracked internal joints between frame and plaster
- Gaps where the sill meets the wall
Different surfaces, different methods
uPVC windows
uPVC expands and contracts noticeably with temperature, so the joint needs a low-modulus sealant that stays flexible. White is the usual colour, with brown, anthracite grey and black for coloured frames.
Aluminium frames
Bi-fold and sliding aluminium doors have long frame joints, and the bottom joint sees the most water. Each is cleaned, backed where deep and resealed.
How we handle window mastic in Fenn Street
From a single sill to a whole house of windows, the work is priced before anything is done. To get one, ring 0345 464 0079 or send us an email with the number of frames and any access details for window mastic in Fenn Street. We work on window sills, timber windows & doors and composite doors, and people most often call us about gaps left after new windows were fitted and whistling draughts around closed windows.
Somewhere as small as Fenn Street, older homes often have timber frames set in stone or brickwork. Not every older frame suits a modern silicone bead, and sometimes a traditional sand mastic is the better choice.
All of our work is guaranteed for twelve months, and the guarantee is the same wherever you are.
- Place
- Fenn Street (ME3)
- Wider area
- Medway
- Guarantee
- One year on every job
- Quotes
- A clear quote up front
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
Towns and villages near Fenn Street
Other services in Fenn Street
Can I do it myself?
The difference is mostly in the preparation and the product. Joints are cleaned back to sound surfaces and dried, and the sealant is matched to the joint and its conditions, then guaranteed for a year.
If you’ve already had a go yourself, that’s fine. We remove it and do the joint properly, so tell us about it when you ask for a quote.
Quotes for window mastic in Fenn Street
Your quote is based on your job. We look at:
- Mould in or behind the old joints
- Any working-time requirements on site
- The number of rooms or windows
- Whether old sealant or filler has to be cut out
Leaving a failed joint normally makes the job bigger, not smaller. If you are unsure, call 0345 464 0079 or email us for an honest opinion and a quote.
What to tell us for a quote
What to tell us when you ask for a quote:
- Any previous sealing or DIY work
- The rough size of the job
- If it’s domestic, commercial or a hotel
- What the problem is, such as mould, gaps, leaks or cracking
To get a quote, phone 0345 464 0079 or drop us an email with the location and a short description of the problem. We’ll give you a clear price before any work starts.
Landlord and commercial work in Fenn Street
Housing providers, facilities teams and property managers book us too in Fenn Street and across Medway. Several sites can go on one quote, and we are fully insured.
In hotels, rooms out of use cost money, so we plan the work room by room. Hotel work is part of what we do, alongside homes and businesses.
Aftercare tips
To keep the joints looking good and working properly:
- Avoid blasting the frames with a pressure washer
- Air rooms to keep condensation down around windows
- Clean frames with a soft cloth and soapy water
- Avoid harsh chemicals near the mastic
Try not to touch the new joint while it cures, for as long as we advise. Do not point a pressure washer at the joints.
A failed joint lets water into the wall a little at a time. Often the first sign is a damp patch inside or flaking paint on the reveal. Early resealing stops it reaching that point.
Do you need window mastic in Fenn Street?
Timber windows bring their own problems. Old mastic gets painted over and cracks under the paint, and timber moves with moisture as well as temperature.
Keep an eye out for these signs:
- Cold air getting in at the frame edge
- White mastic on grey or black frames
- Draughty joints inside around the window
- Mastic that has split away from the wall
Letting a property close to Gillingham (Kent) station? Then cracked frame mastic tends to show up as a draught or damp complaint, so it’s worth checking between lets.
Questions to ask before you book
- Who turns up on the day
- How long the guarantee is
- Whether the sealant suits the joint
- Whether all the old sealant comes out first
How it works
Once we’re on site, we compare the joints with what we discussed. If anything is different, we explain it before carrying on. Most jobs then take most of a day for a typical house, less for a few frames. In a small place like Fenn Street, access is generally the main thing to plan. For outside work, also let us know about exposed walls and any outbuildings involved.
- First we look at every frame and agree the list.
- Next the failed sealant is cut away and the joint cleaned.
- Deep gaps are filled with backing rod to set the depth.
- New exterior sealant goes on in a matching colour and is tooled smooth.
- We clear up and check every joint is fully closed.
How to prepare
- Try not to wet indoor joints just before the visit
- Clear the area around the work
- Mention any leaks or damp you’ve noticed
How to get a quote
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 add photos by email if you can.
Read more
Questions from Fenn Street
Do you cover smaller places like Fenn Street?
Yes. Fenn Street is within the area we cover, which takes in towns, villages and rural addresses. We work across London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
Can you help a landlord with a rental near Gillingham (Kent) station?
Yes, we work for landlords and letting agents. You can phone 0345 464 0079 or drop us an email with the address and a few details, and we’ll give you a fixed price before we start.
Is the new sealant paintable?
Not normally, if it’s silicone. We choose the product with your decorating in mind, so mention it when you book.
Can you work on commercial sites?
Yes. Commercial and hotel work is a large part of what we do. Working times can be discussed when we quote.
Are you an approved applicator?
Yes. ARBOMaster is the approved applicator scheme for Arbo sealants, and we are part of it.
Can you quote for more than one area?
Yes. Just list everything you need.
Is it OK to seal over old sealant?
No. The old sealant always comes out first, so the new sealant bonds properly.
Are you fully insured?
Yes. We’re fully insured, and we can confirm the details when we quote.
Windows and doors in Fenn Street
Fenn Street is within about 2 miles of the coast, where wind-driven rain is a fact of life and, nearer the shore, so is salt air. That’s hard on the mastic around window and door frames, especially on the side facing the sea. London and the South East are among the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
If you look after a building such as High Halstow Primary Academy, its window and door frames need their mastic kept sound, just like a home’s. If you live in an older home near Church of St Mary, the joint between an old wall and a newer frame is usually the first place rain gets in.
Fenn Street is about 5 miles north of Gillingham, in Medway. Fenn Street gets the same service as everywhere we cover: the old material taken out, joints prepared properly and a 12-month guarantee. Fenn Street is one of 68 towns and villages in Medway where we work for window mastic. You can also see our page for Chelmsford, roughly 21 miles from Fenn Street.
Jobs for window mastic in ME3 works the same way as everywhere else we cover. Streets in the area include Winterberry Avenue, Sharnal Street and Parbrook Road, all of which we cover. Nearby, we also carry out window mastic in Sharnal Street (1 mile south-west), High Halstow (1 mile west), Tunbridge Hill (1 mile south-east), St Mary Hoo (1 mile north-east) and Kingsnorth (1 mile south-east). Within a short drive, we also cover Gillingham (5 miles south), Chatham (7 miles south), Rochester (5 miles south-west), Rainham (6 miles south), Strood (6 miles south-west) and Luton (6 miles south).
Around Fenn Street
Typical jobs here are in homes near The Hundred of Hoo Academy, among other places. The closest station to Fenn Street is Gillingham (Kent) station, about 4.4 miles south of the centre. Other landmarks nearby include Medway Maritime Hospital (4.9 miles south) and Upnor Castle (3.7 miles south-west). The countryside around Fenn Street includes Bishop Saltings.