Hampshire · England
New-build mastic & snagging in Upper Swanmore, Hampshire
New build mastic for Upper Swanmore and the surrounding area: careful preparation, the right product and tidy work. Call for a quick quote.
- Gaps between new skirting and floors
- Cracked sealant around new window and door frames
- Gaps behind new kitchen upstands
New build mastic in Upper Swanmore
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 new bead bonds properly instead of bonding to the dust. We work on plot handovers, skirting & floors and windows & doors, and the jobs we see most are cracked sealant around new window and door frames and beads laid onto grit and dust from the build.
Around Upper Swanmore, older homes often have timber floors that move through the year, which is why skirting and threshold joints need a flexible sealant, not filler.
We stand behind the work with a 12-month guarantee, so you are covered after we have gone.
- Location
- Upper Swanmore (SO32)
- Region
- Hampshire
- Cover
- A year, on every job
- Quotes
- Quoted before any work starts
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
FAQs for Upper Swanmore
Will you come out to Upper Swanmore?
Yes. Upper Swanmore is within the area we cover, which takes in towns, villages and rural addresses. We work across London and the South East. Just mention lanes, gates or anything else about the route when you book.
Do you cover Upper Swanmore for new build mastic?
Yes. Our work covers London and the South East, and Upper Swanmore is part of that. Just phone 0345 464 0079 or email us with a few details of the job, and we’ll send you a clear quote.
Are you ARBOMaster approved?
Yes. ARBOMaster is the approved applicator scheme for Arbo sealants, and we’re part of it.
Can you work on commercial sites?
Yes. We work in offices, washrooms, hotels and other commercial premises. We can talk about working times when we quote.
What sealant do you use?
It depends on the joint: sanitary silicone where it gets wet, and sealants suited to movement or weather elsewhere. We use products from Arbo and Everbuild.
Can I add another job to the visit?
Yes. Tell us about everything you’d like done.
Do I have to be there?
That depends on where the joints are. For work indoors, someone needs to let us in, while outside work can sometimes be arranged differently.
What should I tell you?
Where the job is, what the problem is and roughly how big it is. If you can, email a few pictures.
Can I do it myself?
Overfilling a joint is a classic DIY mistake. A thick, smeared bead looks untidy and doesn’t move well, and getting the depth right matters as much as the look.
A DIY attempt does not rule out a professional job. We cut it out and start again.
What sealant work cannot fix
New sealant cannot fix everything, and we’d rather say so up front. It will not solve:
- Leaking fittings rather than failed sealant
- Damaged fittings that need replacing
- A tray or bath that isn’t properly supported, until it’s fixed
If in doubt, ring 0345 464 0079 or drop us an email and we will say what we think.
Joints and surfaces we work on
- Windows & doors
- Plot handovers
- Skirting & floors
- Bathrooms & en suites
- Kitchens
- Show homes
What we’re called out for in Upper Swanmore
New homes are full of moisture from plaster, screed and concrete, and it dries out over the first couple of years. Drying timber shrinks and pulls joints apart and the sealant has to cope with the movement.
Keep an eye out for any of the following:
- Shower seals failing in the first year or two
- Cracked sealant around new window and door frames
- Cracks appearing as a new home settles
- Messy sealant that spoils new finishes
If you’ve bought a new home near Botley station, the sealant around baths, showers and frames is worth checking in the first year or two.
Before you book anyone
- What happens if the job turns out different
- How the surfaces are prepared before sealing
- Whether VAT is included
- Which sealant they’ll use, and why
Surface by surface
Plot handovers
Send us the schedule and any sealant specification for a quote. We seal bathrooms, kitchens, frames and floors as agreed.
Show homes
Bathrooms, kitchens and frames in show homes are sealed or resealed to a neat finish ready for viewings. We’ll plan around viewing times.
Why deal with it now?
A hairline gap at a skirting can wait, but a leaking seal can’t. If you’re unsure which you have, call 0345 464 0079 or email us with pictures. Around Upper Swanmore, older homes often have timber in their floors and frames, where water from a failed joint can cause rot if it’s left.
We do not show prices on the website, because the cost depends so much on the job itself. For a quick quote, please phone 0345 464 0079 or email us.
Why choose Mr Mastic in Upper Swanmore
- 180+ five-star Google reviews
- Domestic, commercial and hotel work
- An ARBOMaster approved applicator
- White, clear, grey or another colour, product permitting
Read our cost guide and customer reviews.
Also near Upper Swanmore
Also in Upper Swanmore
New build mastic in Upper Swanmore: local notes
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.
Around Upper Swanmore, as everywhere, new build mastic is only as good as the preparation behind it.
Upper Swanmore is about 6 miles north-east of Hedge End, in Hampshire. From the centre of Upper Swanmore to the outskirts, we cover new build mastic for every kind of property, from flats and houses to offices and hotels. Upper Swanmore is one of 683 places in Hampshire we cover. For nearby work, see our Southampton page, about 10 miles away.
We cover every part of SO32 for new build mastic and the streets around it. Local streets include Vicarage Lane, Green Lane and Well Lane, all of which we cover. Other places close to Upper Swanmore include Hill Grove (1 mile south), Swanmore (1 mile south-west), The Hangers (1 mile north-west), Droxford (2 miles north-east) and Dean (2 miles north-west). We also work in nearby towns such as Winchester (10 miles north-west), Gosport (10 miles south), Havant (10 miles south-east), Eastleigh (8 miles west), Fareham (7 miles south) and Horndean (8 miles south-east).
Near you in Upper Swanmore
In Upper Swanmore, that means homes and buildings near Swanmore College of Technology and the streets around them. Upper Swanmore’s nearest station is Botley station, about 4.4 miles south-west of the centre. A little further out are Bishop's Waltham Museum (1.9 miles west) and Knowle Hospital (5.1 miles south). Green spaces nearby include St Clair's Meadow and Beacon Hill.
How to look after the new joints
No joint lasts for ever, but care makes a real difference. A few tips:
- Get a leaking seal dealt with right away
- Resist patching a failed seal with a tube from the DIY shop
- Raise failed sealant with the developer while you are covered
- Record problems with dated photos
Keep pictures of the joints and any snagging correspondence with your builder. It helps if anything else comes up during the warranty period.
Mould takes hold quickly in sealant that has gaps or lifted edges. Dealing with it before it goes black saves a harder job later.
What happens on the day
Most of a good job is in the preparation, and we don’t rush it. Every joint is cleaned and dried before new material goes in. In total, it normally takes anything from a few hours to several days, depending on the number of plots. In a small place like Upper Swanmore, access is usually the main thing to plan. For outside work, also let us know about exposed walls and any outbuildings involved.
- 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 down to clean surfaces.
- Joints are vacuumed and cleaned of building dust.
- We prime where needed and apply a sealant suited to each joint.
- Each bead is tooled and the cure times explained.
Preparing for the visit
- Where the joints are inside, avoid wetting them before we arrive
- Tell us about any water getting in
- Move anything stored near the joints
Ask for a quote
To get a quote, call 0345 464 0079 or drop us an email with the location and a short description of the problem. You will have a clear quote before we start.