Greater London · England
Telegraph Hill New Build Mastic
Plot mastic for developers and snagging failed sealant in new homes for householders, landlords and businesses in Telegraph Hill. ARBOMaster approved applicators, fully insured, with a 12-month guarantee.
- Untidy sealant flagged on a snagging list
- Joints pulling apart as timber shrinks
- Gaps between new skirting and floors
Landlord and commercial work in Telegraph Hill
Failed sealant is one of the commonest items on a check-out report, and it’s easy to sort out between tenants. We can quote for more than one property at once.
A neglected joint can let water reach the structure, which matters even more when someone else lives there. Resealing at the right time is simple maintenance that we can handle for you.
New build mastic for homes and businesses in Telegraph Hill
We never seal over a failed new-build bead. Fresh silicone cannot bond to the old layer, so the joint is cut out, cleaned, dried and resealed. If you are dealing with sealant work across a run of new homes and gaps opening as the house dries out and settles, we can help, on bathrooms & en suites, windows & doors and skirting & floors alike.
New flats are going up across London, many of them in larger developments. Snagging there often goes through the developer or managing agent, and shower seals that fail early, skirting joints that open up and gaps at thresholds are all common snags.
The work is guaranteed for twelve months. If something is not right with it in that time, tell us and we will put it right.
- Place
- Telegraph Hill (SE4, SE15, SE14)
- Wider area
- Greater London
- Guarantee
- A year, on every job
- Quotes
- Quoted before any work starts
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
Looking after it afterwards
No joint lasts for ever, but care makes a real difference. Our tips:
- Wait for the cure time before using a resealed shower
- Photograph failed sealant before it’s redone
- Check bath and shower seals every few months as the house settles
- Don’t seal over failed sealant yourself
Follow the cure time we give you before the area gets wet. Silicone is normally left for about a day before water reaches them.
The sooner you deal with untidy or cracking sealant, the less there is to put right. Small faults turn into leaks if left.
More services for Telegraph Hill
Joints and finishes in Telegraph Hill homes
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. Much of London’s new housing is flats in larger developments, where snagging may go through the developer or managing agent.
For new homes near Brockley station, it’s worth checking the sealant early, while snags are still fresh.
Telegraph Hill is about 1 mile south-west of New Cross, in Greater London. Across the SE4 area, our applicators can take on new build mastic. Our Greater London coverage runs to 764 places, Telegraph Hill among them.
Our applicators cover all of SE4, SE15 and SE14 for new build mastic and the streets around it. If you need new build mastic at a property on Mona Road, Pepys Road and Kitto Road or a nearby road, our applicators can take on the job. We also cover the places around Telegraph Hill: Nunhead (1 mile south-west), New Cross (1 mile north-east), Peckham (1 mile north-west), St Johns (1 mile east) and Brockley (1 mile south-east). Within a short drive, we also cover London (3 miles north-west), City of Westminster (6 miles north-west), Marylebone (6 miles north-west), Kensington (7 miles west), St Pancras (5 miles north-west) and Shoreditch (4 miles north).
What’s near Telegraph Hill
Locally, jobs take us to homes and businesses close to Fordham Park and The Brockley Barge pub, among other places. There’s a railway station in Telegraph Hill itself: Brockley station. Well-known places in the area include Southwark Adult Education Institute (0.6 miles north-west) and Lewisham Shopping Centre (1.4 miles east). Not far away are St. James's Park Lake and New Cross Gate Cutting.
What we’re called out for in Telegraph Hill
Sealant applied onto damp surfaces doesn’t bond well. On a busy site, joints aren’t always given time to dry.
Most people get in touch after spotting something like this:
- Internal frame sealant that has split
- Gaps behind new kitchen upstands
- Beads laid onto grit and dust from the build
- Joints pulling apart as timber shrinks
Telegraph Hill is in London, so parking needs planning: tell us about permits, visitor bays or off-street space when you book.
What to look for in a quote
- Whether they’re fully insured
- Which sealant they’ll use, and why
- How the surfaces are prepared before sealing
- How the colour is chosen
Your questions about new build mastic in Telegraph Hill
Is parking a problem for a job in Telegraph Hill?
Parking in Telegraph Hill, as in most of London, takes a little planning: a visitor permit or a nearby bay makes the day run more smoothly.
Do you work for landlords with property near Brockley station?
Yes, we work for landlords and letting agents. You can call 0345 464 0079 or email us with the address and a few details, and we’ll give you a fixed price before any work starts.
Do you guarantee your work?
Yes: twelve months. If anything isn’t right with the work within the year, let us know and we’ll sort it.
Where are you based?
We work from Crawley. Our applicators cover Telegraph Hill.
Can you work from my snagging list?
Yes. We often work straight from a snagging list. We’ll go through the sealant items and agree what we will do.
How long will you be here?
Typically it takes a few hours in a single home. Larger jobs naturally take longer, and we’ll tell you how long to expect.
What sealant do you use?
Each joint gets the product that suits it. Movement, water and weather all affect the choice.
Can you reseal over the builder’s sealant?
No. Fresh silicone doesn’t stick to the old layer, so it soon lifts and traps water. We cut the old bead out completely.
Quotes for new build mastic in Telegraph Hill
There’s no set price list. The quote depends on:
- Working hours on commercial sites
- How easy the joints are to reach
- Whether old sealant or filler has to be cut out
- The number and length of the joints
A few things move the cost up or down: the old material and how easily it comes out, whether mould needs treating, and whether the work is at height. We take all of that into account in your quote.
Helping us quote
A few details help us give you an accurate quote. When you ask for a quote, tell us:
- The type of property
- Access, such as stairs, a lift or height
- The address or postcode of the job
- What’s wrong with the joints now
We do not publish a price list. Instead, we give you a clear price for your job. To get started, ring 0345 464 0079 or send us an email.
What sealant work can’t fix
We’d rather tell you now than do work that won’t last, so these are the limits:
- Your warranty claim itself, which is between you and the builder
- Structural cracks in walls or ceilings
- Leaking fittings rather than failed sealant
Not sure which it is? You can ring 0345 464 0079 or drop us an email and we will tell you honestly.
Surfaces we seal
- Windows & doors
- Skirting & floors
- Bathrooms & en suites
- Kitchens
- Show homes
- Plot handovers
How it works
We work through the job in order: protect, prepare, seal, tidy. Typically it takes a few hours for most snagging lists, longer for a run of plots and we leave things clean and tidy. For a job in Telegraph Hill, parking and access are the things to plan: let us know about parking, the floor we’ll be working on and any lift or shared entrance.
- First, the list of joints is agreed from your snagging sheet or plot schedule.
- The failed sealant is removed completely.
- We clean out the dust and grit left from the build.
- Primer goes on where the surface and product need it, then the new sealant.
- We tool every joint neatly and tell you when each area can be used.
Before we arrive
- Where the joints are inside, avoid wetting them before we arrive
- Tell us if parking is tricky
- Keep pets and children clear of the area while we work
Ask for a quote
For a quick quote, get us on the phone, or email us if that’s easier. Describe what needs sealing and we’ll explain what’s involved and send you a clear quote.
Related advice
Surface by surface
Skirting and floors
As timber and screed dry, skirting and floors shift. We use a flexible product rather than caulk.
Show homes
We can refresh show-home sealant that has discoloured or been knocked. The old bead comes out and a clean new one goes in.