Greater London · England
New Build Mastic in Aldwych
New build mastic for Aldwych, by sealant specialists with 20+ years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Cracked sealant around new window and door frames
- Cracks appearing as a new home settles
- Sealant work across a run of new homes
New build mastic for homes and businesses in Aldwych
New homes move as they dry out. Timber shrinks, plaster dries and baths and trays bed down, so sealant that was laid quickly before handover often cracks. Common call-outs are for gaps opening as the house dries out and settles and sealant applied over dusty or wet surfaces, across windows & doors, kitchens and show homes.
From brand-new flats to converted terraces with new flooring, London has every kind of floor. Wherever a floor meets a wall, a skirting or a threshold, the joint has to allow for movement.
We guarantee the work for a year. If something is not right with it in that time, tell us and we will put it right.
- Place
- Aldwych (W1D, WC2H, W1F)
- Region
- Greater London
- Guarantee
- A year, on every job
- Price
- A clear quote up front
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
New build mastic around Aldwych
Much of London’s new housing is flats in larger developments, where snagging may go through the developer or managing agent. The South East is one of the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
Aldwych is in London, so parking needs planning: tell us about permits, visitor bays or off-street space when you book.
Aldwych is about 1 mile north-west of London, in Greater London. Wherever you are in the W1D postcode area, we cover new build mastic for homes and businesses. Our area takes in 764 places across Greater London.
Every address in W1D, WC2H and W1F is covered for new build mastic. Streets in the area include Shoe Lane, Drury Lane and New Square, all of which we cover. Aldwych is on the A4 and A301, so it’s easy for us to get to with everything needed for new build mastic. If you’re just outside Aldwych, we cover Clare Market (1 mile north), Covent Garden (1 mile west), Temple Bar (1 mile east), Temple (1 mile east) and Adelphi (1 mile south-west). We also work in nearby towns such as Kensington (4 miles west), Walthamstow (6 miles north-east), Hampstead (4 miles north-west), Ruislip (13 miles west), Stockwell (3 miles south) and Orpington (13 miles south-east).
Landmarks near Aldwych
In Aldwych, that means homes and buildings near Ye Old White Horse pub, Lincoln's Inn Fields and Mercers' School, among other places. You’ll also find LSE Shaw Library (under half a mile north-east) and London Nautical School (0.6 miles south-east). The nearest railway station is London Charing Cross station, about 0.5 miles south-west. A little further out are Montfichet's Tower (0.7 miles east) and Gabriel's Wharf (0.5 miles south-east). Open spaces near Aldwych include Barnsbury Wood and Ludgate Hill.
Why act early in Aldwych
A hairline gap at a skirting can wait, but a leaking seal cannot. Not sure whether yours can wait? You can ring 0345 464 0079 or send us an email with a few photos. In a flat in Aldwych, failed sealant seldom stays inside your own four walls: water from a shower or window joint can reach the flat below, and gaps in fire-stopping matter to everyone in the building.
A failed joint rarely gets cheaper to fix by waiting, as water and mould keep getting in. If you’re unsure, call 0345 464 0079 or email us and we’ll give you an honest view and a quote.
Why us?
- Sanitary silicone with an anti-fungal additive in wet areas
- Old sealant always removed completely
- ARBOMaster approved applicator
- Experience in homes, commercial sites and hotels
Read our cost guide or customer reviews.
Surface by surface
Bathrooms and en suites
Trays and baths in new builds settle as they’re used. The joint is stripped back before the new bead goes in and baths are filled before sealing.
Windows and doors
A draught at a new window can be a missed or failed joint. We check and reseal the frame edges.
How to look after the new joints
To keep the joints looking good and working properly:
- Avoid running a DIY bead over the old one
- Keep water off fresh sealant until it has cured
- Check bath and shower seals every few months as the house settles
- Get a leaking seal dealt with straight away
Wipe the sealant with warm soapy water. Keep scourers and harsh chemicals off it.
Report failed sealant to the builder while you are in the snagging period. After that, putting it right may fall to you so report it promptly.
When something else is needed
We won’t take on work that won’t last, so here’s what sealant can’t put right:
- Your warranty claim itself, which is between you and the builder
- Plumbing faults behind the sealant
- Baths and trays that move too much for sealant to cope with
If you are not sure, just ring 0345 464 0079 or drop us an email and we will give you a straight answer.
Joints and surfaces we work on
- Windows & doors
- Bathrooms & en suites
- Skirting & floors
- Kitchens
- Plot handovers
- Show homes
Places near Aldwych
Other services in Aldwych
FAQs for Aldwych
I let a flat near London Charing Cross station. Can you help?
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 price.
Can you do new build mastic in Aldwych?
Yes, Aldwych is within the area we cover. Our work covers London and the South East. You can phone 0345 464 0079 or email us and tell us what needs doing.
How long does the job take?
Typically it takes anything from a few hours to several days, depending on the number of plots. Larger jobs naturally take longer, and we will tell you how long to expect.
Should I wait before resealing?
Where water is getting through, don’t wait. Small gaps that are just cosmetic can be resealed once movement has slowed.
Are you an approved applicator?
Yes. We are approved under the ARBOMaster scheme, the approved applicator scheme for Arbo sealants.
Do the sealants smell?
Sometimes, a little. Any smell clears as the sealant cures.
Do you work for hotels and businesses?
Yes. We work in offices, washrooms, hotels and other commercial premises. Working times can be discussed when we quote.
Can you match the sealant colour to my new kitchen or bathroom?
White and clear are the most common, but other colours are available. We choose one to suit the room before we begin.
What we’re called out for in Aldwych
If plaster or screed was still damp when it was sealed, the bond suffers. On a busy site, joints are not always given time to dry.
Common reasons people contact us include:
- Gaps between new skirting and floors
- Worktop and upstand sealant coming away
- Untidy sealant flagged on a snagging list
- Cracked sealant around new window and door frames
If you’ve bought a new home near London Charing Cross station, the sealant around baths, showers and frames is worth checking in the first year or two.
Before you book anyone
- How much experience the applicator has
- How the colour is chosen
- What preparation is included
- What insurance they hold
The process
At the end, we look at the finished work together and explain the cure time. The visit itself usually takes anything from a few hours to several days, depending on the number of plots, depending on the size of the job. Many London jobs are in flats, so we come ready for stairs, narrow hallways and shared entrances. Mention any building rules, key holders or managing agents when you book.
- First, the list of joints is agreed from your snagging sheet or plot schedule.
- Every bit of the old builder’s sealant is cut out.
- Joints are vacuumed and cleaned of building dust.
- Primer goes on where the surface and product need it, then the new sealant.
- Each bead is tooled and the cure times explained.
Before we arrive
- Clear items away from the joints we’re working on
- Tell us about any water getting in
- Let us know about parking restrictions
Getting a quote
Need a quote? Please call 0345 464 0079 or send us an email and tell us about the job. You’ll know what we plan to do, and what it will cost, before any work begins.
Advice
DIY versus a professional finish
Some jobs are best left to a professional: high-level joints, fire-rated gaps, external movement joints and big jobs call for the right materials, safe access and experience.
What a professional job adds is preparation and the right product. We take joints back to clean, dry surfaces, and the sealant is chosen for how the joint moves and where it is, and the work is guaranteed for a year.