Hampshire · England
Portmore New Build Mastic
Our applicators work in Portmore on plot mastic for developers and snagging failed sealant in new homes. Old sealant removed completely, joints prepared properly and every job guaranteed for a year.
- Beads laid onto grit and dust from the build
- Cracks appearing as a new home settles
- Worktop and upstand sealant coming away
DIY sealant or a professional job?
Some sealant jobs are within reach of a careful DIYer, like a short, easy-to-reach joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
The difference is mostly in the preparation and the product. Joints are cleaned back to sound surfaces and dried, and the sealant is matched to the joint and its conditions, then guaranteed for a year.
New build mastic in Portmore, done properly
Across Portmore, we work for both new-home owners and the builders handing those homes over. Whether it’s one en suite or a run of plots, the method is the same: remove, clean, prime where needed, then a neat new bead. Typical jobs include gaps between new skirting and floors and gaps opening as the house dries out and settles, on show homes, bathrooms & en suites and skirting & floors.
For a small place like Portmore, the journey and access are planned in advance, and once on site, the job is the same as anywhere.
Every job comes with our 12-month guarantee.
- Place
- Portmore (SO41)
- Region
- Hampshire
- Guarantee
- 12 months on all our work
- Price
- A clear price before any work starts
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
Nearby places to Portmore
What else we do in Portmore
New build mastic around Portmore
Portmore is close to the coast. Plot mastic on new homes near the coast takes more weather than it would inland, so any gaps are best picked up early. 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 Portmore, as anywhere, good new build mastic starts with a clean, dry, properly prepared joint. If you’ve bought a new home near Lymington Town station, the sealant around baths, showers and frames is worth checking in the first year or two.
Portmore is about 2 miles north-east of Lymington, in Hampshire. Anywhere in SO41, we cover new build mastic for homes and businesses. Portmore is one of 683 places in Hampshire we cover. Our Southampton page covers work nearby.
Our applicators cover all of the SO41 postcode area for new build mastic and the streets around it. We cover properties on Warborne Lane, Jordans Lane and Main Road. Other places close to Portmore include Warborne (1 mile west), Pilley (1 mile north-west), Bull Hill (1 mile north), Pilley Bailey (1 mile north) and Walhampton (1 mile south). Within a short drive, we also cover Eastleigh (15 miles north-east), Fareham (15 miles east), Totton (10 miles north), Hedge End (14 miles north-east), Romsey (15 miles north) and Hythe (8 miles north-east).
Landmarks near Portmore
Around Portmore, our work takes us to homes and buildings near William Gilpin Church of England Primary School, Priestlands School and Walhampton Arms and the streets around them. The closest station to Portmore is Lymington Town station, roughly 1.1 miles south-west of the centre. Nearby you will also find Lymington New Forest Hospital (1 mile south-west) and Yarmouth Castle (4.8 miles south). For a walk, there’s Boldre Foreshore.
When something else is needed
Sealant is not the answer to every problem, and we’d rather say so up front. It will not solve:
- Deciding who is responsible under a builder’s warranty
- Cracking that points to a structural problem
- Leaking fittings rather than failed sealant
Not sure which it is? You can call 0345 464 0079 or email us and we will tell you honestly before booking.
Joints and surfaces we work on
- Plot handovers
- Bathrooms & en suites
- Skirting & floors
- Show homes
- Windows & doors
- Kitchens
What we do, step by step
A visit follows a simple pattern: we check the joints, protect the area around them, carry out the job and tidy away. It usually takes anything from a few hours to several days, depending on the number of plots. Somewhere as small as Portmore, access is often the only tricky part. For outside work, also let us know about exposed walls and any outbuildings involved.
- We go through the snagging list or plot schedule and agree the joints to do.
- The old bead comes out in full, with no layer left behind.
- Each joint is cleaned of dust and grit, then primed if required.
- New sealant suited to each joint is applied and tooled neatly.
- Finally, each room is checked and you’re given the cure time.
Before we arrive
- Move anything stored near the joints
- Try not to wet indoor joints just before the visit
- Let us know about parking restrictions
Get a quote
Want a quote for new build mastic? Please phone 0345 464 0079 or drop us an email and tell us about the job. We’ll explain what we’d do and give you a clear price before any work starts.
Advice
What the job involves on each surface
Show homes
We can refresh show-home sealant that has discoloured or been knocked. We cut it out and reseal neatly.
Plot handovers
Send us the schedule and any sealant specification and we’ll quote. We seal bathrooms, kitchens, frames and floors.
Landlord and commercial work in Portmore
We also work for property managers and facilities teams in Portmore and across Hampshire. Several sites can go on one quote, and we’re fully insured.
Water getting past a failed joint can damage the building, which is a bigger problem in a rented property. Keeping joints in good order is simple maintenance.
Looking after it afterwards
How long the joints last depends on use and care. Here’s what we suggest:
- Resist patching a failed seal with a tube from the DIY shop
- Report sealant problems to your builder during the snagging period
- Check bath and shower seals every few months as the house settles
- Open a window or run the fan after bathing
Ventilation matters in a new home, which is still drying out. Use the extractor fan or open a window after showers so moisture doesn’t sit on the sealant.
A seal that splits early is often a sign of movement. Have it resealed, and the tray or bath checked, before it gets worse.
Portmore questions
Can you do new build mastic in Portmore?
Yes. We work across London and the South East, and Portmore is part of that. You can phone 0345 464 0079 or send us an email and let us know what needs doing, and we’ll send you a clear quote.
Do you cover smaller places like Portmore?
Yes. Portmore is within the area we cover, which takes in towns, villages and rural addresses. Our work covers London and the South East. Just mention lanes, gates or anything else about the route when you book.
How long does new build mastic take?
Typically it takes anything from a few hours to several days, depending on the number of plots. Bigger jobs take longer, and we’ll tell you how long to expect.
Do you work for letting agents?
Yes, regularly. We can quote for several properties at once.
Can you reseal over the builder’s sealant?
No. The old sealant is cut out fully, the joint cleaned and primed where needed, and a new bead applied.
Will the old sealant be removed?
Yes, always, and completely. New sealant won’t bond properly to old, so the joint is cleaned back first.
Do you use white or clear sealant?
The colour is chosen to suit the tiles, worktop or frame. Tell us what you’d like when you get a quote.
Can you quote for more than one area?
Yes, and it often makes sense. Doing several areas at once is usually more efficient, so mention them when you ask for a quote.
What happens if it’s left?
A hairline gap at a skirting can wait, but a leaking seal can’t. If you are unsure which you have, call 0345 464 0079 or send us an email with pictures and we’ll give you a straight answer. Around Portmore, older homes often have timber in their floors and frames, and water through a failed joint can rot timber if it’s left.
A failed joint rarely gets cheaper to fix by waiting, because water and mould keep working on it. If you’re unsure, call 0345 464 0079 or send us an email and we will give you an honest view and a quote.
Why Portmore customers choose us
- Quality sealants from Arbo and Everbuild
- One-year guarantee on every job
- Any old sealant cut out fully, not covered over
- White, clear, grey or another colour, product permitting
Take a look at how sealant jobs are priced or our reviews.