West Sussex · England
New Build Mastic in Portfield
Plot mastic for developers and snagging failed sealant in new homes for Portfield, backed by a 12-month guarantee. Ask us for a quote.
- Frame joints opening as the plaster dries
- Smeared, uneven beads picked up at snagging
- Sealant work across a run of new homes
New build mastic for homes and businesses in Portfield
New homes move as they dry out. Timber dries and shrinks, and baths and trays settle, so sealant that was laid quickly before handover often cracks. Common call-outs are for gaps between new skirting and floors and sealant work across a run of new homes, on bathrooms & en suites, windows & doors and show homes.
If you’ve bought a new home in or near Portfield, the first year or two is a good time to check the sealant. Gaps at skirtings, shower seals pulling away and missing mastic around frames are common snags.
All of our work is guaranteed for twelve months, and the guarantee is the same wherever you are.
- Location
- Portfield (PO19, PO20, PO18)
- Wider area
- West Sussex
- Guarantee
- A year, on every job
- Quotes
- A clear quote up front
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
What happens on the day
All our tools and materials come with us in the van, so you don’t need to buy or prepare anything. Once we’ve agreed what’s being done, we protect the area and start. It normally takes anything from a few hours to several days, depending on the number of plots. For a job in Portfield, we agree the time, the access and parking before the day. If the work is outside, the weather plays a part, as sealant needs a dry surface.
- Each joint is checked for movement before work begins.
- Old sealant is cut out and the joints cleaned.
- Joints are dried and primed where the product calls for it.
- New sealant goes in, with baths filled first so they’re at their heaviest.
- We check every joint and leave you with the cure times.
Getting ready for the visit
- Let us know about parking restrictions
- For indoor joints, keep the area dry beforehand if you can
- Let us know if you’ve seen damp or leaks
How to get a quote
For new build mastic in Portfield, ring 0345 464 0079 or drop us an email. Tell us what the problem is and where, and you’ll get a clear quote before work begins.
Read more
What new build mastic looks like in Portfield
Compared with the north and west, the South East gets less rain, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
In and around Portfield, as anywhere, good new build mastic starts with a clean, dry, properly prepared joint.
Portfield is about 1 mile east of Chichester, in West Sussex. Portfield gets the same service as everywhere we cover: the old material taken out, joints prepared properly and a 12-month guarantee. We cover 371 towns and villages across West Sussex. Portsmouth is on our list too, about 14 miles from Portfield.
Postcode districts we cover here for new build mastic: PO19, PO20 and PO18. New build mastic is available to properties on Kent Road, York Road and Spur Road. Main roads around Portfield include the A259 and A285, so getting to you is simple. If you are just outside Portfield, we cover Chichester (1 mile west), Westhampnett (1 mile north-east), Shopwyke (1 mile east), Maudlin (1 mile north-east) and North Mundham (2 miles south). Within a short drive, we also cover Bognor Regis (5 miles south-east), Selsey (7 miles south), Littlehampton (10 miles east), Emsworth (8 miles west), Rustington (11 miles east) and Storrington (15 miles north-east).
Around Portfield
Around Portfield, our work takes us to homes and buildings near The Prebendal School, The East Gate Public House and Chichester High School For Girls. Portfield’s nearest station is Chichester station, about 0.9 miles west. Nearby you’ll also find The Chichester City Museum (0.6 miles west) and Chichester Castle (0.6 miles west). Open spaces near Portfield include Kingley Vale National Nature Reserve and Stoke Down.
What we cannot put right
We will not take on work that will not last, so here’s what sealant cannot put right:
- Deciding who is responsible under a builder’s warranty
- Cracking that points to a structural problem
- Cracked trays, tiles or worktops
Not sure which it is? You can phone 0345 464 0079 or send us an email and we will tell you honestly.
Joints and surfaces we work on
- Show homes
- Bathrooms & en suites
- Windows & doors
- Plot handovers
- Skirting & floors
- Kitchens
Portfield questions
Do you cover Portfield for new build mastic?
Yes. We work across London and the South East, and Portfield is part of that. Just call 0345 464 0079 or email us with a few details of the job.
I let a flat near Chichester station. Can you help?
Yes, rental work is part of what we do. You can phone 0345 464 0079 or send us an email with the address and a few details, and we will give you a fixed price before any work starts.
Is it worth resealing while the house is still settling?
It depends on whether water is getting through. A leaking shower or bath seal should be redone right away, while small cosmetic gaps can wait a while.
Do you work for developers?
Yes. We work through plots to your schedule ready for handover. Tell us the plots and the joints involved and we will quote.
Can I send you my snagging list?
Yes. Send the list and a few photos of the sealant items. We’ll tell you if anything on it isn’t a sealant job.
Is it normal for sealant to crack in a new home?
Lots of new homes see sealant crack early as timber and plaster dry out. Poor preparation at handover adds to it.
Will the old sealant be removed?
Yes. Sealing over old sealant is the main reason resealing fails early, so we never do it.
Where are you based?
Our base is in Crawley, West Sussex, and we work across South East England, London and Scotland.
Signs you need new build mastic in Portfield
A new house holds a lot of water from the build, which takes a year or two to dry out. Drying timber shrinks and pulls joints apart and the sealant has to cope with the movement.
Signs it’s time to call us include:
- Smeared, uneven beads picked up at snagging
- Internal frame sealant that has split
- Sealant that never bonded to the surface
- Sealant work across a run of new homes
For new homes near Chichester station, it’s worth checking the sealant early, while snags are still fresh.
Comparing quotes
- What the quote includes, VAT included or not
- What guarantee comes with the work
- What happens if the job turns out different
- How much experience the applicator has
Why it’s worth doing now in Portfield
Sealant done properly at handover means fewer callbacks. Snagging visits for failed sealant cost time on every plot and most come down to preparation. In an older home around Portfield, damp from a failed joint can get into timber and plaster, and that is a much bigger job than renewing the sealant.
Instead of a standard rate, we look at what your job involves: the amount of work, the old material and the access. You’ll know the price before we begin.
Why Portfield customers choose us
- Domestic, commercial and hotel work
- ARBOMaster approved applicator
- Colour agreed with you before any work starts
- Colour picked to suit the job
Read what affects the cost and our reviews.
Different surfaces, different methods
Plot handovers
Send us the schedule and any sealant specification for a quote. Sealant work across the plot is covered as agreed.
Windows and doors
The gap between a new frame and its plaster reveal often opens up. We remove cracked sealant and apply a flexible one.
DIY sealant or a professional job?
A DIY attempt does not rule out a professional job. We remove it and do the joint properly, so tell us about it when you ask for a quote.
The difference is mostly in the preparation and the product. Joints are cleaned back to sound surfaces and dried, and the sealant is chosen for how the joint moves and where it is.
How to look after the new joints
Good habits help new joints last longer. Our tips:
- Get a leaking seal dealt with straight away
- Ventilate bathrooms well, especially in the first year
- Put sealant faults on your snagging list early
- Do not seal over failed sealant yourself
Keep the bathroom ventilated, especially in the first year. Use the extractor fan or open a window after showers to help keep mould away.
A seal that splits early is often a sign of movement. Have it resealed, and the tray or bath checked, before it gets worse.