Portsmouth · England
New-build mastic & snagging in Landport, Portsmouth
Specialist new build mastic for Landport: careful preparation, the right product and tidy work. Ask us for a quick quote.
- Shower seals failing in the first year or two
- Worktop and upstand sealant coming away
- Messy sealant that spoils new finishes
New build mastic in Landport
Across Landport, we work for both new-home owners and the builders handing those homes over. One shower or a whole phase of plots, the method doesn’t change: cut out, clean, prime where needed and reseal neatly. We work on kitchens, windows & doors and show homes, and people most often call us about smeared, uneven beads picked up at snagging and plot mastic for developers ahead of handover.
Homes around Landport range from older cottages to newer houses, and their floors range just as widely, each moving in its own way. The sealant at skirtings and thresholds has to suit the floor it meets.
We guarantee the work for a year. If something is not right with it in that time, tell us and we’ll put it right.
- Location
- Landport (PO1, PO2, PO5)
- Region
- Portsmouth
- Guarantee
- 12 months on all our work
- Quotes
- Quoted before any work starts
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
Different surfaces, different methods
Show homes
In a show home, the sealant is on display. We lay neat, even beads in colours to suit the finishes.
Skirting and floors
Wet-area floor joints need a flexible seal. They get a flexible, water-resistant sealant.
Why act early in Landport
DIY kits do not solve the main problems with new-build sealant: dust, no primer and old sealant left in the joint. Cutting out, cleaning and priming are what make the difference. Homes in smaller places like Landport 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.
Every job is a little different, so each one gets its own quote. The number of joints, how easy they are to reach and the sealant needed all make a difference, and we will explain the quote if you ask.
Why book with us
- Over 20 years’ experience
- 180+ five-star Google reviews
- Neat joints and a tidy finish
- A 12-month guarantee on all work
See our cost guide or customer reviews.
DIY sealant or a professional job?
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.
If you are set on DIY, put the effort into preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it doesn’t work out, we can still put it right.
More services for Landport
Questions from Landport
Do you cover smaller places like Landport?
Yes, Landport is covered. Our work covers London and the South East, from towns to the smallest places. Longer journeys are simply planned in advance.
I let a flat near Portsmouth & Southsea station. Can you help?
Yes, we work for landlords and agents. Just call 0345 464 0079 or drop us an email and tell us about the property, and we’ll give you a clear quote.
Do the sealants smell?
That depends on the sealant. Some products have a noticeable smell, others very little, and any smell fades as they cure.
Do you work for developers?
Yes. We take on second-fix sealant work across new plots. We clean and prime joints properly to keep callbacks down.
When is the best time to reseal in a new build?
It depends on whether water is getting through. A leaking shower or bath seal should be redone right away, but cosmetic gaps can wait for movement to slow.
Should I go to my builder first?
Start with your builder while their snagging or warranty period runs. If that doesn’t work out, we are happy to quote with our one-year guarantee.
Will it make a mess?
No. We protect the surfaces around the joints, and we clear up the old sealant and our materials before we leave.
Why does sealant fail so quickly in new builds?
It’s common, and there are normally two reasons: movement as the house dries and settles, and sealant laid onto dust without primer. Cutting it out and resealing properly fixes both.
What we can’t put right
New sealant cannot fix everything, and we’d rather say so up front. It won’t solve:
- Leaks from pipes, valves or wastes, which need a plumber
- Your warranty claim itself, which is between you and the builder
- Baths and trays that move too much for sealant to cope with
If you’re not sure, just call 0345 464 0079 or send us an email and we’ll give you a straight answer.
Surfaces we seal
- Windows & doors
- Skirting & floors
- Kitchens
- Bathrooms & en suites
- Show homes
- Plot handovers
Signs you need new build mastic in Landport
Sealant applied onto damp surfaces does not bond well. On a busy site, joints aren’t always given time to dry before the sealant goes on.
If you can see any of these, it’s time to have the joints looked at:
- Internal frame sealant that has split
- Beads laid onto grit and dust from the build
- Leaking shower tray seals in a new home
- Worktop and upstand sealant coming away
In and around Landport, as anywhere, good new build mastic starts with a clean, dry, properly prepared joint.
Comparing quotes
- How the joint is cleaned and prepared
- What happens if the job turns out different
- The length of the guarantee
- What product goes in the joint
New build mastic around Landport
Landport 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. 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.
If you’ve bought a new home near Portsmouth & Southsea station, the sealant around baths, showers and frames is worth checking in the first year or two.
Landport is about 1 mile south-west of Portsmouth, in Portsmouth. We provide new build mastic to homes and businesses in Landport and the surrounding area, as part of our work across Portsmouth. Across Portsmouth, we cover 19 places, Landport among them.
We cover every part of PO1, PO2 and PO5 for new build mastic. New build mastic is available to properties on Lake Road, Watts Road and Alfred Road and the roads around them. We also cover the places around Landport: Portsmouth (1 mile north-east), Fratton (1 mile east), Rudmore (1 mile north), Kingston (1 mile east) and North End (1 mile north). Further out, we also cover Wymering (3 miles north), Paulsgrove (3 miles north), Cosham (3 miles north), Drayton (3 miles north-east) and Farlington (4 miles north-east).
Near you in Landport
Typical jobs here are in homes near The Painters Arms, St Edmund's Catholic School and Alexandra Park and the streets around them. There’s a railway station in Landport itself: Portsmouth & Southsea station. A little further out are Royal Portsmouth Hospital (under half a mile south-west) and Charles Dickens Birthplace Museum (under half a mile north). Not far away are Milton Locks and Portsdown Hill.
The process
When we get to you, we compare the joints with what we discussed. If anything is different, we explain it before carrying on. Most jobs then take a few hours in a single home. In a smaller place like Landport, parking is seldom the issue; lanes, gates and long drives are worth mentioning. For outside work, side access and the height of the joints help us plan.
- We start by going through the snagging items or plot schedule with you.
- Every bit of the old builder’s sealant is cut out down to clean surfaces.
- We clean out the dust and grit left from the build.
- We prime where needed and apply a sealant suited to each joint.
- Each bead is tooled and the cure times explained.
Getting ready for the visit
- Tell us about access, such as stairs, a lift or high-level joints
- Let us know about earlier repairs to the joints
- Tell us if parking is tricky
Ask for a quote
Need a quote? Please ring 0345 464 0079 or drop us an email with a few details. We will explain what we’d do and give you a clear price before work begins.
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Work for landlords, hotels and businesses
Landlords and agents in Landport can book us as well as householders. Resealing between tenancies is a simple way to keep a property in good order.
We regularly work with letting and managing agents. Tell us the address, the job and how access works.