Hampshire · England
New-build mastic & snagging in Mottisfont, Hampshire
Plot mastic for developers and snagging failed sealant in new homes for Mottisfont, backed by a one-year guarantee. Call for a quick quote.
- Frame joints opening as the plaster dries
- Sealant applied over dusty or wet surfaces
- Untidy sealant flagged on a snagging list
About our new build mastic in Mottisfont
Some owners wait for the first year’s movement before having joints redone. For small cosmetic gaps, that is reasonable, but a failed shower or bath seal shouldn’t wait. We work on plot handovers, windows & doors and kitchens, and the jobs we see most are sealant applied over dusty or wet surfaces and plot mastic for developers ahead of handover.
Older homes in small places like Mottisfont often have timber floors that move with the seasons, which is why skirting and threshold joints need a flexible sealant, not filler.
We stand behind the work with a one-year guarantee, so you’re not left on your own once the job is done.
- Location
- Mottisfont (SO51)
- Wider area
- Hampshire
- Guarantee
- 12 months on all our work
- Price
- A clear price before we start
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
Surface by surface
Windows and doors
A draught at a new window can be a missed or failed joint. We check and reseal the frame edges.
Bathrooms and en suites
Baths, showers, basins and trays in new bathrooms are the most common new-build reseal. We cut out the failed bead, clean and prime, and reseal with anti-fungal sanitary silicone.
New build mastic in Mottisfont: local notes
Rainfall in the South East is lower than in much of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
In and around Mottisfont, as anywhere, good new build mastic starts with a clean, dry, properly prepared joint.
Mottisfont is about 4 miles north-west of Romsey, in Hampshire. Wherever you are in the SO51 postcode area, our applicators can take on new build mastic. Mottisfont is one of 683 towns and villages in Hampshire where we work for new build mastic. You can also see our page for Southampton, roughly 10 miles from Mottisfont.
Work in SO51 is quoted and booked the same way as anywhere else. That includes homes and businesses on Mottisfont Lane, Church Lane and Hatt Lane. Other places close to Mottisfont include Stonymarsh (1 mile east), Dunbridge (1 mile south-west), Kimbridge (1 mile south), Michelmersh (1 mile east) and Timsbury (2 miles south-east). Further out, we also cover Winchester (10 miles east), Eastleigh (10 miles south-east), Andover (12 miles north), Totton (8 miles south), Chandler's Ford (7 miles south-east) and Hedge End (13 miles south-east).
Landmarks near Mottisfont
Locally, jobs take us to homes and businesses close to The Bear And Ragged Staff Public House and the streets around them. The nearest railway station is Mottisfont & Dunbridge station, roughly 0.6 miles south-west of the centre. Other landmarks nearby include King Johns House (3.7 miles south-east) and Romsey Community Hospital (4 miles south-east).
Landlords, agents and businesses in Mottisfont
Housing providers, facilities teams and property managers book us too. Several sites can go on one quote.
Water getting past a failed joint can damage the building, which is a bigger problem in a rented property. Resealing at the right time is simple maintenance that we can handle for you.
How to look after the new joints
So the new joints stay in good condition:
- Avoid scourers and strong chemicals on sealant
- Photograph failed sealant before it’s redone
- Resist patching a failed seal with a tube from the DIY shop
- Raise failed sealant with the developer while you are covered
Keep an eye on the joints over the first couple of years. Small gaps can appear as the house dries.
A seal that splits early is often a sign of movement. Getting it resealed properly, and any movement checked, stops it recurring.
How it works
When we arrive, we start by going over the job with you. We protect the surfaces around the joints before any work starts. Most jobs take a few hours in a single home. Somewhere as small as Mottisfont, access is often the only tricky part. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- Each joint is checked for movement before we start.
- 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.
- The finished joints are checked and the cure times given.
Preparing for the visit
- Mention any leaks or damp you’ve noticed
- For indoor joints, keep the area dry beforehand if you can
- Mention any tricky access
Get a quote
For a quick quote, get us on the phone, or email us if that’s easier. Tell us about the joints that need doing and we will talk you through the work before giving you a price.
Read more
How we quote for new build mastic
We quote each job individually. These are the things that affect it:
- The amount of work
- The type of sealant required
- Any working-time requirements on site
- How easy the joints are to reach
Leaving a failed joint usually makes the job bigger, not smaller. If you’re not sure whether it needs doing, call 0345 464 0079 or send us an email for an honest opinion and a quote.
What to tell us for a quote
The more you tell us, the more accurate the quote. When you ask for a quote, tell us:
- The type of property
- A few photos by email, if you can
- Roughly how big the job is
- Where the job is, and your postcode
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.
Also near Mottisfont
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Why deal with it now?
DIY kits do not solve the main problems with new-build sealant: grit, unprimed surfaces and old layers underneath. Cutting out, cleaning and priming are what make the difference. Where a wall is exposed, as many are in small places like Mottisfont, wind-driven rain gets into any failed joint, and older walls, once damp, take a long time to dry.
Every job is a little different, so each one gets its own quote. Size, access and the product the joint needs all make a difference.
What you get with us
- A 12-month guarantee on all work
- Domestic, commercial and hotel work
- We leave the area clean and tidy
- Anti-fungal sanitary silicone in wet areas
Take a look at our cost guide and our reviews.
Your questions about new build mastic in Mottisfont
Can you help a landlord with a rental near Mottisfont & Dunbridge station?
Yes, landlords and agents are among the people we work for. Just call 0345 464 0079 or send us an email with the address and what needs doing, and we’ll give you a clear price.
Do you cover smaller places like Mottisfont?
Yes, we do. We work across London and the South East, from towns to the smallest places. Longer journeys are simply planned in advance.
Do you work for developers?
Yes. We carry out plot mastic and second-fix sealing for builders and developers. Send the schedule and any specification and we will give you a quote.
Where are you based?
Mr Mastic is based in Crawley. Our applicators cover Mottisfont.
Do you do commercial work?
Yes. We work in offices, washrooms, hotels and other commercial premises. Working times can be discussed when we quote.
Do you take out the old sealant first?
Yes, always, and completely. New sealant won’t bond properly to old, so any old material comes out before anything new goes in.
Should I try DIY first?
You can, for simple jobs. Preparation is everything: all the old sealant out, and a clean, dry joint. If it doesn’t work out, we can redo it.
Is it messy?
We keep the work tidy. Nearby surfaces are protected, and we clear up when we’re done.
Do you need new build mastic in Mottisfont?
On many sites, sealant goes on in the final rush before handover. Joints are not always cleaned of dust or primed, so the bead never bonds properly.
Look out for any of the following:
- Smeared, uneven beads picked up at snagging
- Joints pulling apart as timber shrinks
- Second-fix sealing on new plots
- Gaps between new skirting and floors
If you’ve bought a new home near Mottisfont & Dunbridge station, the sealant around baths, showers and frames is worth checking in the first year or two.
What to look for in a quote
- Are they insured?
- When the joint can take water or movement
- How hidden problems are handled
- How much experience the applicator has