Essex · England
Foster Street Window Mastic
Window mastic across Foster Street and nearby, with old sealant always removed completely and a 12-month guarantee.
- Black, perished sealant on frames
- Rushed sealant from a window installation
- Cold air getting in at the frame edge
Window mastic for homes and businesses in Foster Street
Over two decades of sealing frames has taught us which products suit which walls. We are ARBOMaster approved and fully insured, and we give a one-year guarantee on the work. Common call-outs are for mastic that’s falling out in pieces and whistling draughts around closed windows, on patio & French doors, timber windows & doors and uPVC windows.
Around Foster Street, many homes face open ground, so their windows and doors take the full weather. That exposure dries out and cracks the mastic around frames and sills faster.
There’s a 12-month guarantee on every job, whatever its size.
- Where
- Foster Street (CM17)
- Wider area
- Essex
- Guarantee
- A year, on every job
- Price
- Quoted before any work starts
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
Why act early in Foster Street
The work is quick compared with the damage it prevents: it takes a morning for a couple of windows and a door. Leave it until water is coming in and you may need plastering and decorating as well. In a small place like Foster Street, homes can be exposed to wind and rain, which finds any gap, and older walls, once damp, take a long time to dry.
We don’t show prices on the website, because the cost depends so much on the job itself. Call for a quick quote.
What you get with us
- Sanitary silicone with an anti-fungal additive in wet areas
- Homes, businesses and hotels
- 180+ five-star Google reviews
- Trusted Arbo and Everbuild sealants
Read our cost guide or what customers say.
Do you need window mastic in Foster Street?
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.
The problems people generally mention when they call include:
- Cracked or shrunken mastic around the frame
- Untidy mastic left by window fitters
- Leaking joints at the ends of sills
- Black, perished sealant on frames
If you live in an older home near Church of All Saints, frames set in older brick or stone need a sealant that suits the wall as well as the frame.
Questions to ask before you book
- What happens if they find a problem under the old sealant
- Whether all the old sealant comes out first
- Whether VAT is included
- What insurance they hold
What window mastic looks like in Foster Street
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. Foster Street is part of Harlow, one of the post-war new towns. With many homes from the post-war decades, replacement windows and doors are common. That mastic ages as well, and sills and frame heads are where leaks start.
Rented homes near Harlow Mill station change hands often, and cracked frame mastic tends to show up as a draught or damp complaint, so it’s worth checking between lets. Schools such as Henry Moore Primary School are buildings too, and larger buildings have plenty of frames, and the mastic around each one ages.
Foster Street is about 2 miles east of Harlow, in Essex. From the centre of Foster Street to the outskirts, we cover window mastic for every kind of property, from flats and houses to offices and hotels. Our Essex coverage runs to 644 places, and Foster Street is one of them. Our Chelmsford page covers work nearby, about 14 miles away.
We work across CM17 for window mastic. If you need window mastic at a property on Foster Street, Highfield Close and Hastingwood Park or anywhere close by, our applicators can take on the job. Neighbouring places we cover for window mastic include Hastingwood (1 mile south), Newhall (1 mile north-west), Latton (1 mile west), Magdalen Laver (1 mile east) and Housham Tye (2 miles north-east). We also work in nearby towns such as Chelmsford (14 miles east), Brentwood (11 miles south-east), Billericay (15 miles south-east), Loughton (9 miles south-west), Waltham Abbey (8 miles south-west) and Great Dunmow (12 miles north-east).
Local landmarks in Foster Street
Typical jobs here are in homes near John Barleycorn Public House, Passmores Academy and Brays Grove and the streets around them. The nearest railway station is Harlow Mill station, roughly 2.3 miles north-west of the centre. Other landmarks nearby include Princess Alexandra Hospital (3 miles west) and Harlow Mill (2.4 miles north-west). Not far away are Gernon Bushes.
What affects the cost of window mastic
We do not publish a price list, because jobs vary so much. What we look at:
- How much old sealant there is and how hard it is to remove
- Working hours on commercial sites
- How much there is to do
- How many rooms, windows or areas are involved
Commercial jobs are quoted on the same basis as homes: how much there is to do, how we reach it and what it needs. Ask us for a quote and we’ll go through it with you.
Helping us quote
When you contact us, these details help:
- What’s wrong with the joints now
- Photos by email, if that is easy
- Whether it’s a home or a business
- Roughly how big the job is
Quotes start with a quick conversation. Describe the problem, the location and the size of the job, and we’ll explain how we’d tackle it. When it suits you, phone 0345 464 0079 or email us.
FAQs for Foster Street
Should the sealant in an older Foster Street home be renewed?
If it hasn’t been replaced for some years, it’s usually worth it. Sealant does not last for ever, and its life depends on use, cleaning and weather, and many homes in Foster Street may already be on their second or third set.
Can you help a landlord with a rental near Harlow Mill station?
Yes, rental work is part of what we do. Just ring 0345 464 0079 or send us an email and tell us about the property, and we’ll give you a clear quote.
Does someone need to be in?
For indoor joints, yes, someone needs to let us in. After that, you can carry on with your day.
Do you have sealant for grey or black windows?
Usually, yes. Tell us the frame colour when you get in touch and we will use the nearest match.
Do you take out the old sealant first?
Yes, always, and completely. New sealant won’t bond properly to old, so the joint is cleaned back first.
Do you have insurance?
Yes. We are fully insured, and we have been doing sealant work for more than 20 years.
Is there any odour?
Sometimes, a little. Any smell clears as the sealant cures, and ventilation helps.
Do you come to Foster Street?
Yes. We cover Foster Street and the rest of Essex, as part of our work across South East England, London and Scotland. For a quote, call 0345 464 0079 or send us an email.
What the job involves on each surface
Aluminium frames
Coated aluminium needs a compatible sealant. We use a neutral-cure product.
Window sills
Sills catch the water running down the glass, so the sill ends and the joint under the frame are vital. Each is cleaned out and resealed.
Towns and villages near Foster Street
More services for Foster Street
DIY sealant or a professional job?
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.
Some jobs are best left to a professional: work at height, external movement joints, fire-rated sealant and large areas need the right product, the right access and the right method.
Keeping the joints in good condition
Once the sealant has cured, a few habits help it last:
- Keep solvents and bleach off the sealant
- Look round the frames every year or so
- Keep jet washers away from the mastic
- Keep paint off silicone joints
Timber frames need their paint kept up, because bare, wet timber moves more and pulls at the joint. Keep paint off the silicone itself.
Draughts get worse, not better. As the old mastic shrinks further, more air gets through, and heat escapes around the frame. A new joint closes it up.
What happens on the day
A visit follows a simple pattern: we look at the joints together, mask and protect the surrounding surfaces, carry out the job and tidy away. Most jobs take a few hours for a few frames, or a day or more for a whole house. Somewhere as small as Foster Street, access is often the only tricky part. For outside work, also let us know about exposed walls and any outbuildings involved.
- First we look at every frame and agree the list.
- The old mastic is cut out and the surfaces cleaned back.
- We fit backing rod in deep gaps so the sealant is the right depth.
- A flexible, weatherproof sealant is applied in a colour to suit the frame.
- We clear up and check every joint is fully closed.
Preparing for the visit
- Move anything stored near the joints
- Where the joints are inside, avoid wetting them before we arrive
- Let us know about stairs, lifts or work at height
Getting a quote
Asking for a quote is easy: tell us what needs doing and where and its rough size. A few photos by email make the job easier to understand, and we’ll take it from there.