Hertfordshire · England
Window & door mastic in Furneux Pelham, Hertfordshire
Mastic around window and door frames, sills and patio doors for homeowners, landlords and businesses in Furneux Pelham. Fully insured, ARBOMaster approved and guaranteed for a year.
- Rain getting in at the frame or under the sill
- Black, perished sealant on frames
- Hard, cracked sealant around windows
How we handle window mastic in Furneux Pelham
The mastic around a window or door seals the gap between the frame and the wall. Once that seal fails, wind and rain find the gap. The old mastic is removed and the joint resealed with a flexible exterior sealant. If you have rushed sealant from a window installation and rain getting in at the frame or under the sill, we can help, on uPVC windows, window sills and composite doors alike.
Homes in small places like Furneux Pelham often stand in the open, with little to shelter their windows from wind and rain. Exposed frames and sills lose their mastic sooner than sheltered ones.
We guarantee the work for a year. If something is not right with it in that time, tell us and we’ll put it right.
- Where
- Furneux Pelham (SG9)
- Wider area
- Hertfordshire
- Guarantee
- 12 months on all our work
- Quotes
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
What we’re called out for in Furneux Pelham
Older frames were often sealed with products that set hard. Once it’s rigid, every bit of frame movement pulls at it, and a gap opens along one edge.
Keep an eye out for any of the following:
- Whistling draughts around closed windows
- Draughty joints inside around the window
- Black, perished sealant on frames
- Leaking joints at the ends of sills
Homes close to Church of St Mary include some older properties, and the joint between an old wall and a newer frame is usually the first place rain gets in.
Questions to ask before booking
- Whether all the old sealant comes out first
- What preparation is included
- When the joint can take water or movement
- What the quote includes, VAT included or not
What happens on the day
All our tools and materials come with us in the van, so you do not need to buy or prepare anything. Once we’ve agreed what’s being done, we protect the area and start. Most jobs take most of a day for a typical house, less for a few frames. Somewhere like Furneux Pelham needs a little journey planning: let us know about lanes, gates and parking. Everything for the job comes with us, so a second trip is avoided where possible.
- We check each frame and agree which ones need doing.
- Next the failed sealant is cut away and the joint cleaned.
- 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.
How to prepare
- Clear items away from the joints we’re working on
- Mention if the joints have been sealed before
- Mention any leaks or damp you’ve noticed
Getting a quote
Want a quote for window mastic? Please phone 0345 464 0079 or drop us an email and tell us about the job. We’ll explain what we’d do and send you a clear quote before work begins.
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Furneux Pelham questions
What guarantee comes with window mastic in Furneux Pelham?
All our work, in Furneux Pelham and everywhere else, comes with a 12-month guarantee. We are fully insured, and an ARBOMaster approved applicator.
Is Furneux Pelham in your area for window mastic?
Yes, Furneux Pelham is within the area we cover. We work across London and the South East. Just phone 0345 464 0079 or email us with a few details of the job.
How long before the joint can be used?
Cure times vary by product and the temperature. We tell you how long to leave it before we go.
Is it worth trying it myself?
You can, for simple jobs. The key is preparation: remove all the old material and work on a clean, dry joint. We can always put it right if it fails.
Can you seal over the old sealant?
No, it will not last. It can look neat for a few weeks, but the new layer lifts away from the old one. Removing the old sealant completely is the only lasting way.
What should I tell you?
Just the basics: the address or postcode, what’s wrong and any access issues. Then ring 0345 464 0079 or send us an email.
Do the sealants smell?
It depends on the product. Some smell for a while, some hardly at all.
Can you do upstairs windows?
Yes, where it’s safe. Higher or awkward frames may need extra access, and we’ll confirm what’s needed.
How the job changes by surface
Composite doors
An exposed front door gets wind-driven rain, and the top and bottom corners tend to fail first. We pay most attention there.
Timber windows & doors
Soft or rotten wood cannot be sealed successfully. If we find rot, we’ll tell you before going ahead, as that is a job for a joiner.
What window mastic looks like in Furneux Pelham
London and the South East are among the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
Schools such as Furneux Pelham Church of England School are buildings too, and the mastic around its windows and doors needs looking after like any other building’s.
Furneux Pelham is about 5 miles north-west of Bishop's Stortford, in Hertfordshire. We carry out window mastic for homeowners, landlords and businesses in Furneux Pelham and nearby, as part of our work across Hertfordshire. Furneux Pelham is one of 381 places in Hertfordshire where we work. You can also see our page for Chelmsford, about 22 miles away.
Postcode districts we cover here for window mastic: SG9. Whether your property is on The Street and The Causeway or anywhere close by, our applicators can take on the job. We also cover Albury (1 mile south), Gravesend (2 miles south), Brent Pelham (2 miles north), Clapgate (2 miles south) and Great Hormead (2 miles north-west). We also work in nearby towns such as Stevenage (11 miles west), Bishop's Stortford (5 miles south-east), Welwyn Garden City (15 miles south-west), Hitchin (15 miles west), Hoddesdon (13 miles south) and Hertford (11 miles south-west).
Local landmarks in Furneux Pelham
Locally, jobs take us to homes and businesses close to The Star Public House, among other places. A little further out are Brent Pelham (2.1 miles north).
Aftercare tips
After the cure time, these simple habits help:
- Wash the frames with mild soapy water
- Make sure the drainage slots aren’t blocked
- Check the mastic once a year
- Paint up to the joint, not over it
Wipe the frames with soapy water when you clean the windows, and keep solvents and harsh chemicals off the joint.
Draughts get worse, not better. As old mastic keeps shrinking, the gap widens, and a cold room gets colder. A new joint closes it up.
Why deal with it now?
Draughts and leaks don’t always mean new windows. Where the frames are sound, new mastic usually deals with draughts and leaks at the edges. If we find failed glass units or worn seals, we’ll tell you. Older cottages and farmhouses around Furneux Pelham can have timber floors and frames, and water through a failed joint can rot timber if it’s left.
Combining jobs into one visit generally makes better use of the time than several visits. You’ll get one clear quote for the whole job.
Why book with us
- A 12-month guarantee on all work
- Neat joints and a tidy finish
- ARBOMaster approved applicator
- Anti-fungal sanitary silicone in wet areas
Can I do it myself?
If you’re set on DIY, put the effort into preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it does not work out, we can still put it right.
A careful DIYer can reseal a simple joint, such as a straightforward joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
How we quote for window mastic
The price is agreed before any work begins. It takes into account:
- Working hours on commercial sites
- Whether the work is at height
- The product the joint needs
- How much there is to do
What you pay reflects the work, not guesswork. That is why we ask a few questions first and send you a clear quote before work begins.
What we need to know
There’s no need for technical detail. It helps if you can tell us:
- If it’s domestic, commercial or a hotel
- If someone has resealed it before
- The rough size of the job
- Where the property is
There’s no standard price list. Instead, your job gets its own clear quote. To arrange one, ring 0345 464 0079 or drop us an email.