Greater London · England
Colliers Wood New Build Mastic
New build mastic in Colliers Wood from a team with over 20 years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Second-fix sealing on new plots
- Gaps between new skirting and floors
- Internal frame sealant that has split
FAQs for Colliers Wood
Is Colliers Wood in your area for new build mastic?
Yes, Colliers Wood is within the area we cover. Our work covers London and the South East. Just phone 0345 464 0079 or email us with a few details of the job, and we’ll send you a clear quote.
Is parking a problem for a job in Colliers Wood?
In much of London, parking needs planning: a visitor permit or a nearby bay makes the day run more smoothly, so mention what’s available when you book.
Who should fix failed sealant in a new build?
Start with the builder if you’re in the snagging or warranty period. If it isn’t resolved, we can reseal it properly.
Is there any odour?
Some sealants have a smell while they cure. Ventilation helps.
Is the work guaranteed?
Yes. Each job is guaranteed for twelve months.
Do you take out the old sealant first?
Yes, every time. New silicone does not stick to old silicone, so the joint is cleaned back first.
Can tenants book the work?
Yes, though it’s best to check with your landlord first. Landlords are often happy for the work to be arranged.
Why does sealant fail so quickly in new builds?
New homes dry out and move in their first couple of years, and sealant is often applied quickly onto dusty surfaces. Either can make it fail early.
New build mastic for homes and businesses in Colliers Wood
Developers send us the plot schedule and we work through it. Bathrooms, en suites, kitchens, frames and skirting are sealed ready for handover with a sealant suited to each area. Common call-outs are for frame joints opening as the plaster dries and sealant applied over dusty or wet surfaces, on bathrooms & en suites, skirting & floors and show homes.
Across London, commercial floors have movement joints that break down under heavy foot traffic, and new homes need their plot mastic finished properly before handover, in Colliers Wood and beyond.
All of our work is guaranteed for twelve months.
- Location
- Colliers Wood (SW17, SW19, CR4)
- Wider area
- Greater London
- Cover
- One year on every job
- Price
- A clear price before work begins
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
Places near Colliers Wood
What else we do in Colliers Wood
Quotes for new build mastic in Colliers Wood
You will get a clear quote before we start. It takes into account:
- Any working-time requirements on site
- The old material and how stubborn it is
- Which sealant suits the joint
- Any mould that needs treating
Commercial jobs are quoted on the same basis as homes: the amount of work, the access and the products needed, plus any working-time requirements on site. Call for a quick quote and we will go through it with you.
What we need to know
There’s no need for technical detail. It helps if you can tell us:
- Any previous sealing or DIY work
- Where the property is
- Access, such as stairs, a lift or height
- What’s wrong with the joints now
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 email pictures if that’s easy.
What the job involves on each surface
Windows and doors
On new builds, external frame sealant can be patchy. We reseal it with a weatherproof, flexible sealant.
Plot handovers
We work through plots to your schedule, sealing each room ready for handover. Joints are prepared properly before sealing to keep callbacks down.
What happens if it’s left?
DIY kits do not solve the main problems with new-build sealant: dust, no primer and old sealant left in the joint. Proper removal and preparation are what make it last. In a flat in Colliers Wood, failed sealant seldom stays inside your own four walls: water can reach the neighbours below, and gaps in fire-rated joints affect the whole building.
Combining jobs into one visit normally makes better use of the time than several visits. You’ll get one clear quote for the whole job.
Why choose Mr Mastic in Colliers Wood
- A sealant colour to suit the surroundings
- Trusted Arbo and Everbuild sealants
- One-year guarantee on every job
- Over 20 years’ experience
Take a look at what affects the cost and customer reviews.
Looking after it afterwards
Joint life depends on how it’s used and looked after. We suggest:
- Avoid scourers and strong chemicals on sealant
- Resist patching a failed seal with a tube from the DIY shop
- Use the extractor fan every time you shower
- Follow the cure time we give you
Keep photos of the joints and any snagging correspondence with your builder. It’s useful if you need to raise other issues later.
The sooner you deal with untidy or cracking sealant, the less there is to put right. Left alone, a small crack can become a leak.
DIY sealant or a professional job?
The biggest DIY mistake is sealing over old sealant. New silicone won’t bond to old, so it peels away and traps moisture behind it. Everything old must be removed first.
If you do try it yourself, take your time over the preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it doesn’t work out, we can still put it right.
New homes and floors in Colliers Wood
Many of London’s new homes are flats in bigger developments, where snags may need reporting through the developer or the managing agent. 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.
As a London address, Colliers Wood can be tricky for parking: tell us about permits, visitor bays or off-street space when you book. If you’ve bought a new home near Tooting station, the sealant around baths, showers and frames is worth checking in the first year or two.
Colliers Wood is about 5 miles south of Brompton, in Greater London. Jobs in Colliers Wood get the same care as everywhere else we work: the old material taken out, joints prepared properly and a 12-month guarantee. We cover 764 towns and villages across Greater London, large and small. For nearby work, see our London page (6 miles or so).
Here we cover the SW17, SW19 and CR4 postcode area for new build mastic. New build mastic is available to properties on Acre Road, Boyd Road and Park Road and the roads around them. Other places close to Colliers Wood include Tooting (1 mile north), Tooting Bec (1 mile north), Merton Abbey (1 mile south-west), Furzedown (1 mile north-east) and Eastfields (1 mile south-east). Within a short drive, we also cover London (6 miles north-east), City of Westminster (7 miles north), Marylebone (7 miles north), Kensington (6 miles north), St Pancras (8 miles north) and Shoreditch (8 miles north-east).
Landmarks near Colliers Wood
We work in homes and buildings around Figge's Marsh, Ensham School and The Royal Standard pub, among other places. There’s a railway station in Colliers Wood itself: Tooting station. Nearby you will also find Grove Hospital (0.6 miles north) and Wandle Industrial Museum (1.2 miles south). Not far away are Henman Hill and Myrna Close.
The process
A visit follows a simple pattern: we look at the joints together, protect the area around them, carry out the job and tidy away. Most jobs take anything from a few hours to several days, depending on the number of plots. For a job in Colliers Wood, 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.
- Each joint is checked for movement before any work starts.
- We remove the failed sealant and clean the joints.
- Joints are dried and primed where the product calls for it.
- Baths are filled with water, then the new sealant is applied.
- The finished joints are checked and the cure times given.
Getting ready for the visit
- Plan for the work area to be out of bounds to pets and children
- Let us know about stairs, lifts or work at height
- Mention if the joints have been sealed before
How to get a quote
It all starts with a short chat. Tell us what’s wrong, where it is and how much there is, and we will explain how we’d tackle it. When it suits you, ring 0345 464 0079 or send us an email.
Related advice
When something else is needed
Honest advice matters more to us than a booking, so here’s what sealant can’t fix:
- Plumbing faults behind the sealant
- Disputes or warranty claims with your builder
- Structural cracks in walls or ceilings
Not sure which it is? You can call 0345 464 0079 or drop us an email and we’ll tell you honestly.
Surfaces we seal
- Plot handovers
- Skirting & floors
- Kitchens
- Bathrooms & en suites
- Windows & doors
- Show homes