Hampshire · England
Swanwick New Build Mastic
Professional new build mastic in and around Swanwick, with old sealant always removed completely and a 12-month guarantee.
- Gaps opening as the house dries out and settles
- Worktop and upstand sealant coming away
- Sealant work across a run of new homes
New build mastic for homes and businesses in Swanwick
Snagging sealant properly means taking the failed bead out completely. Fresh silicone cannot bond to the old layer, so the joint is cut out, cleaned, dried and resealed. We work on show homes, skirting & floors and plot handovers, and people most often call us about second-fix sealing on new plots and sealant that never bonded to the surface.
For a small place like Swanwick, the journey and access are planned in advance, and once on site, the job is the same as anywhere.
We guarantee the work for a year. If something isn’t right with it in that time, tell us and we will put it right.
- Location
- Swanwick (SO31, PO15)
- Wider area
- Hampshire
- Guarantee
- 12 months on all our work
- Quote
- A clear price before any work starts
- Call
- 0345 464 0079
- Updated
- 26 October 2026
Landlord and commercial work in Swanwick
We also work for businesses, from offices to washrooms and kitchens. For commercial premises, we can talk through working times when we quote.
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.
Should I try it myself first?
Too much sealant is as bad as too little. A heavy bead looks messy and copes badly with movement, and getting the depth right matters as much as the look.
Sealing over old silicone is the commonest DIY error. New silicone won’t bond to old, so it lifts and traps water and mould underneath. All the old material has to come out first.
What new build mastic looks like in Swanwick
Swanwick is within about 3 miles of the coast. New homes near the sea put their outside mastic to work from day one, so any gaps are best picked up early. Rainfall in the South East is lower than in much of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
For new homes near Bursledon station, it’s worth checking the sealant early, while snags are still fresh.
Swanwick is about 2 miles south of Hedge End, in Hampshire. Whether you’re in the middle of Swanwick or further out, we cover new build mastic for every kind of property. 683 places in Hampshire are on our list, from the larger towns to small villages.
We cover every part of the SO31 and PO15 postcode area for new build mastic and the streets around it. Local streets include Walpole Lane, Ashby Mews and Swanwick Lane. Other places close to Swanwick include Lower Swanwick (1 mile north-west), Sarisbury (1 mile south-east), Park Gate (1 mile south-east), Burridge (1 mile north-east) and Sarisbury Green (1 mile south). Larger places within reach include Winchester (12 miles north), Gosport (8 miles south-east), Havant (13 miles east), Eastleigh (6 miles north-west), Fareham (4 miles south-east) and Horndean (12 miles east).
Around Swanwick
In Swanwick, that means homes and buildings near The Old Ship Inn and Brookfield Community School and Language College and the streets around them. For rail, the closest station is Bursledon station, roughly 0.8 miles west of the centre. Well-known places in the area include Bursledon Brickworks Industrial Museum (within half a mile north) and St Andrew's Castle (2.4 miles south-west). The countryside around Swanwick includes Swanwick Lakes.
How to look after the new joints
Once the sealant has cured, a few habits help it last:
- Photograph failed sealant before it’s redone
- Do not wait for the house to settle if water is getting through
- Follow the cure time we give you
- Ventilate bathrooms well, especially in the first year
Ventilation matters in a new home, which is still drying out. Run the fan or open a window after bathing.
Early snagging is easier snagging. Left alone, a small crack can become a leak.
Towns and villages near Swanwick
Other services in Swanwick
The process
You don’t need to clear the whole room or building before we come, just the space around the work. Everything nearby is protected, and the work takes anything from a few hours to several days, depending on the number of plots in most cases. Somewhere like Swanwick needs a little journey planning: let us know about lanes, gates and parking. Everything for the job comes with us, so a second trip is avoided where possible.
- First we work through your snagging list or plot schedule with you.
- Failed or untidy sealant is cut out completely.
- We clean off dust from the build and prime the surfaces where the product needs it.
- We apply a sealant that suits each joint and tool it to a neat finish.
- Finally, each room is checked and you’re given the cure time.
Preparing for the visit
- Tell us about any previous sealing or DIY attempts
- Let us know about stairs, lifts or work at height
- Try not to wet indoor joints just before the visit
Ask for a quote
Getting a quote is simple: let us know the job and the location. A few photos by email make the job easier to understand, and we’ll take it from there.
Advice
Quotes for new build mastic in Swanwick
The quote reflects the job in front of us. We take into account:
- The old material and how stubborn it is
- Any working-time requirements on site
- The size of the job
- Any mould that needs treating
Every job is a little different, so we quote each one individually. Size, access and the product the joint needs all play a part, and we will explain the quote if you ask.
Helping us quote
There’s no need for technical detail. It helps if you can tell us:
- Access, such as stairs, a lift or height
- Roughly how big the job is
- If it’s domestic, commercial or a hotel
- Photos by email, if that is easy
Need a quote? Please ring 0345 464 0079 or drop us an email and tell us about the job. We’ll explain what we’d do and send you a clear quote before we start.
Swanwick questions
I let a flat near Bursledon station. Can you help?
Yes, we work for letting agents and landlords. Just phone 0345 464 0079 or send us an email and tell us about the property, and we will send you a clear quote.
Do you cover smaller places like Swanwick?
Yes, we do. Our work covers London and the South East, from towns to the smallest places. Longer journeys are simply planned in advance.
Are you fully insured?
Yes. We are fully insured, and we’ve been doing sealant work for more than 20 years.
Can you do several jobs on one visit?
Yes, and it often makes sense. Doing several areas at once is usually more efficient, so mention them when you ask for a 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.
My new home is still under warranty. Should I contact you?
Report it to the builder first while you’re covered. If it is not resolved, we’ll cut it out and reseal it.
Do you work for hotels and businesses?
Yes. Commercial and hotel work is a large part of what we do. Working times can be discussed when we quote.
Where do you work from?
Mr Mastic is based in Crawley. Our applicators cover Swanwick, along with the rest of our area.
When to call us in Swanwick
The first winter with the heating on dries a new home quickly. Gaps open along skirting, frames and worktops.
Signs it’s time to call us include:
- Gaps between new skirting and floors
- Worktop and upstand sealant coming away
- Sealant work across a run of new homes
- Cracks appearing as a new home settles
In and around Swanwick, as anywhere, good new build mastic starts with a clean, dry, properly prepared joint.
Before you book anyone
- How much experience the applicator has
- Which sealant they’ll use, and why
- Are they insured?
- How hidden problems are handled
When it is not the sealant
Honest advice matters more to us than a booking, so here’s what sealant can’t fix:
- Damaged fittings that need replacing
- Leaks from pipes, valves or wastes, which need a plumber
- Cracking that points to a structural problem
Not sure which it is? You can call 0345 464 0079 or email us and we will tell you honestly.
Joints and surfaces we work on
- Kitchens
- Skirting & floors
- Plot handovers
- Bathrooms & en suites
- Show homes
- Windows & doors