Windsor and Maidenhead · England
Old Windsor New Build Mastic
New build mastic for Old Windsor, by sealant specialists with 20+ years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Messy sealant that spoils new finishes
- Worktop and upstand sealant coming away
- Sealant work across a run of new homes
DIY versus a professional finish
Some jobs are best left to a professional: work at height, external movement joints, fire-rated sealant and large areas call for the right materials, safe access and experience.
Overfilling a joint is a classic DIY mistake. A heavy bead looks messy and copes badly with movement, and getting the depth right matters as much as the look.
New build mastic in Old Windsor
Building dust is behind a lot of failed new-build sealant. Each joint is cleaned of dust and primed where the product calls for it, so the sealant actually sticks instead of bonding to the dust. If you have smeared, uneven beads picked up at snagging and second-fix sealing on new plots, we can help, on skirting & floors, plot handovers and bathrooms & en suites alike.
If you’ve bought a new home in or near Old Windsor, the first year or two is a good time to check the sealant. Gaps at skirtings, shower seals pulling away and missing mastic around frames are common snags.
We stand behind the work with a 12-month guarantee, so you are not left on your own once the job is done.
- Place
- Old Windsor (SL4)
- Region
- Windsor and Maidenhead
- Cover
- 12 months on all our work
- Quotes
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
When something else is needed
Before booking, it’s worth knowing the limits:
- Leaking fittings rather than failed sealant
- Broken tiles or a split tray
- Baths and trays that move too much for sealant to cope with
If you are not sure, just phone 0345 464 0079 or email us and we’ll give you a straight answer.
Where we work in Old Windsor
- Plot handovers
- Windows & doors
- Show homes
- Skirting & floors
- Bathrooms & en suites
- Kitchens
Different surfaces, different methods
Kitchens
Sink joints are wet all the time. We use a sealant suited to kitchens suited to the job.
Skirting and floors
As timber and screed dry, skirting and floors shift. Caulk cracks; a flexible sealant moves with it in a colour to suit.
Why act early in Old Windsor
The builder is generally the first port of call while the snagging or warranty period runs. If it’s slow, or the same joint keeps failing, a proper reseal from a specialist is the next step. Homes in smaller places like Old Windsor can face more weather, and failed outside joints let damp into walls. Inside, a split seal lets water into floors and panels just as it would anywhere.
Leaving a failed joint normally makes the job bigger, not smaller, as water and mould keep getting in. If you’re unsure, ring 0345 464 0079 or drop us an email for an honest opinion and a quote.
Why book with us
- Anti-fungal sanitary silicone in wet areas
- White, clear, grey or another colour, product permitting
- A sealant colour to suit the surroundings
- We’re fully insured
Read what affects the cost and what customers say.
Places near Old Windsor
Other services in Old Windsor
Your questions about new build mastic in Old Windsor
Do you work for landlords with property near Sunnymeads station?
Yes, landlords and agents are among the people we work for. Just phone 0345 464 0079 or send us an email with the address and what needs doing, and we will give you a clear price.
Is Old Windsor within the area you cover?
Yes, Old Windsor is covered. Our work covers London and the South East, and smaller places are part of that. Longer journeys are simply planned in advance.
What do you put in the joint?
Quality sealants from brands including Arbo and Everbuild, picked for each joint. We’ll tell you what we’re using and why.
How long does new build mastic take?
A typical job takes a few hours for most snagging lists, longer for a run of plots, including the preparation. We will confirm how long when we quote.
Is the work guaranteed?
Yes. All our work carries a one-year guarantee.
Can I send you my snagging list?
Yes. We often work straight from a snagging list. We agree the sealant items with you before any work starts.
How long before the joint can be used?
Different products cure at different speeds, so please follow the time we give you.
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.
Looking after it afterwards
After the cure time, these simple habits help:
- Avoid running a DIY bead over the old one
- Act quickly if a seal starts to leak
- Follow the cure time we give you
- Raise failed sealant with the developer while you’re covered
Wipe the sealant with warm soapy water. Keep scourers and harsh chemicals off it as they wear the bead.
Do not let the snagging period run out with sealant problems unreported. After that, putting it right may fall to you.
How the visit works
Once we’re on site, we check the joints match what you told us. If anything is different, we explain it before carrying on. After that, the work takes a few hours in a single home. For a job in Old Windsor, we agree the time, the access and parking before the day. Outdoor jobs depend on a dry day, since sealant needs a dry surface.
- We look at why each joint failed, including any movement.
- Old sealant is cut out and the joints cleaned.
- We make sure the joints are dry and prime them if needed.
- New sealant goes in, with baths filled first so they’re at their heaviest.
- We check every joint and leave you with the cure times.
How to prepare
- Mention if the joints have been sealed before
- Tell us about access, such as stairs, a lift or high-level joints
- For business premises, tell us about site rules or sign-in
How to get a quote
We do not publish a price list. Instead, we give you a clear price for your job. To arrange one, phone 0345 464 0079 or email us.
Advice
Joints and finishes in Old Windsor homes
Compared with the north and west, the South East gets less rain, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
In and around Old Windsor, as anywhere, good new build mastic starts with a clean, dry, properly prepared joint.
Old Windsor is about 2 miles north-west of Egham, in Windsor and Maidenhead. Whether you’re in the middle of Old Windsor or further out, new build mastic is available for homes and businesses alike. Across Windsor and Maidenhead, we cover 57 places, and Old Windsor is one of them. We also work in Reading, about 17 miles from Old Windsor.
Work in SL4 works the same way as everywhere else we cover. You’ll find streets such as Church Road, Parker Gardens and Gregory Drive, and we cover them all. With the B3021 close by, Old Windsor is simple for us to get to for new build mastic. Neighbouring places we cover for new build mastic include Wraysbury (1 mile east), Sunnymeads (1 mile north-east), Bishopsgate (1 mile south), Datchet (2 miles north) and Englefield Green (2 miles south). Within a short drive, we also cover Maidenhead (8 miles north-west), Windsor (3 miles north-west), Boyn Hill (8 miles north-west), North Ascot (6 miles south-west), Cookham (9 miles north-west) and Furze Platt (9 miles north-west).
Local landmarks in Old Windsor
Locally, jobs take us to homes and businesses close to St John's Beaumont School, Windsor Great Park and The Fox And Castle Public House. Old Windsor’s nearest station is Sunnymeads station, roughly 1.3 miles north-east of the centre. Well-known places in the area include Windsor Castle (2.1 miles north-west) and Berkshire Yeomanry Museum (1.6 miles north-west). Open spaces near Old Windsor include St Ann's Hill and Virginia Water Lake.
What we’re called out for in Old Windsor
Sealant is often one of the last jobs before handover. Dusty, unprimed joints are common, so the bead never bonds properly.
Look out for these signs:
- Kitchen sealant that has pulled off the wall
- Frame joints opening as the plaster dries
- Leaking shower tray seals in a new home
- Second-fix sealing on new plots
For new homes near Sunnymeads station, it’s worth checking the sealant early, while snags are still fresh.
What your quote should include
- What product goes in the joint
- How the surfaces are prepared before sealing
- Who does the work, and how experienced they are
- Whether all the old sealant comes out first