Mastic sealant contractors in Portfield
Mastic sealing in Portfield, backed by over 20 years in commercial sealing. Fully insured, with a 12-month guarantee.
- Communal area joints that look neglected
- No planned programme for sealant
- Occupiers reporting cold air round windows
Mastic sealing for businesses in Portfield
Photos, a specification or a quick description of the joints is enough to start a fixed quote.
Mastic sealing in Portfield, done properly
Before work starts, most agents and landlords want the documents in order. For documents, tell us what site paperwork you need (RAMS, insurance certificate, CSCS details) and we will confirm with the quote. We are CHAS accredited and a Constructionline member, with public liability insurance. Most enquiries involve estate-wide sealant that is simply worn out and window mastic that has split and shrunk, across external wall and movement joints, balcony and threshold joints and communal entrances and stairwells. A single leaking joint is often how a building in Portfield first comes to us: we check the joints around it and give you an honest view of what needs doing now and what can wait.
Older buildings and conversions around places like Portfield mix old masonry with newer frames. The mastic there needs to suit both surfaces.
The 12-month guarantee is for workmanship rather than wear and tear. How long a sealant joint lasts depends on movement, exposure, cleaning and use, so we’re clear about what is covered before work starts.
- Location
- Portfield (PO19, PO20, PO18)
- Region
- West Sussex
- Guarantee
- A 12-month guarantee
- Quotes
- Fixed quote, scope in writing
- Telephone
- 01277 525 020
- Page updated
- 3 November 2026
When to bring in a specialist
There’s also the paperwork. Main contractors and clients often ask for CSCS cards, RAMS and insurance details, and our CSCS-carded applicators are used to working under those rules.
Site maintenance staff can often handle a short internal joint. The usual problems come from preparation: sealing over old material, sealing onto damp or dusty surfaces, or a product that can’t take the movement.
From enquiry to sign-off
Site rules come first: sign-in, induction and whatever permit system the building uses. With the paperwork done, the joints are worked through in the order agreed with your site contact. Several jobs near Portfield can be grouped on one trip. Tell us your site hours and we will plan around them.
- First we look at the mastic on each building and note what needs replacing.
- A fixed quote follows, split by block or building if that suits you.
- The programme is fixed with you, including dates you can pass on to residents or tenants.
- Old sealant is stripped and each face prepared back to firm material.
- Backing rod and primer go in as the joint requires, then the new bead is placed and tooled.
- Each building is checked on completion and the work carries our 12-month guarantee.
Getting the site ready
- Point out any areas we must not close
- Share the asbestos register for older buildings
- Arrange parking or a loading space
Quotes
Photos, drawings or a schedule of the joints and a fixed quote comes back to you. Where a site visit makes more sense, we’ll arrange one.
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Questions we are asked in Portfield
Do you work in occupied care homes around Portfield?
Yes. Care settings are planned area by area, at times agreed with the home. Tell us about any infection-control or safeguarding requirements and we’ll work to them.
Can you quote for a block close to Chichester station?
Yes, we work for agents, landlords and housing associations with blocks of every size. Send the address, photographs of the elevations and your access arrangements, and we will give a fixed quote.
What guarantee do you give on resealing?
Our workmanship carries a 12-month guarantee, backed by public liability insurance.
Do you work in Portfield?
Yes. Portfield is in our area. To discuss a job, call the office on 01277 525 020 or email the details over.
How do you choose the sealant?
The specification comes first, if there is one. Without one, the joint decides: how much it moves, what it bonds to and whether it’s wet, trafficked or fire-rated.
What if the old mastic contains asbestos?
In older buildings, old mastic can contain asbestos. We check the asbestos register or survey before disturbing it and suspect material is tested first.
How long does a job like this take?
That varies with the scale of the job, though a typical visit typically takes a few days for most blocks, with larger programmes scheduled building by building. Larger or phased jobs take longer, and we will give you a timescale with the quote.
Maintenance after handover
Your facilities or cleaning team can help the joints last. Share these points with them:
- Check sealant joints during planned building inspections
- Ask residents or tenants to report leaks and draughts early
- Look at the sunniest and most exposed elevations first
- Keep bins and bikes away from communal door frames
Add mastic joints to your cyclical inspections. Watch for splits, open gaps, hard or chalky surfaces and mastic pulling away and record where they are.
Leaks at window perimeters spoil finishes and can affect frames. Resealing early keeps the job small.
Looking after buildings in and around Portfield
There are three care or nursing homes within about 2 miles of Portfield. Owners of care premises can bring window and door mastic into a phased programme planned around the home. At about 54 miles from central London, Portfield is within reach of the capital. Within reach of London, blocks run by agents and associations are common around stations.
If you manage student housing near a university such as University of Chichester (0.8 miles north-west of Portfield), the summer turnaround is the time for mastic. Blocks of flats and mixed-use buildings often cluster around stations such as Chichester station (0.9 miles west of Portfield) and their window and balcony mastic tends to age at the same rate across a building.
Portfield is about 1 mile east of Chichester, in West Sussex. Our applicators travel to Portfield for work on mastic joints. We work across 373 places in West Sussex, large and small. Sites around Portsmouth have their own page, roughly 14 miles from Portfield.
Business premises anywhere in PO19, PO20 and PO18 are within our area for mastic joints. Among the streets we cover are Kent Road, York Road and Spur Road. Main routes into Portfield include the A259 and A285, which helps when planning parking and deliveries for the job. Nearby places we also cover include Chichester (1 mile west), Westhampnett (1 mile north-east), Shopwyke (1 mile east), Maudlin (1 mile north-east) and North Mundham (2 miles south) for mastic joints. Bigger towns within reach include Bognor Regis (5 miles south-east), Selsey (7 miles south), Littlehampton (10 miles east), Rustington (11 miles east), Storrington (15 miles north-east) and Angmering (12 miles east).
Local landmarks in Portfield
Locally, jobs take us to sites close to The Prebendal School, The East Gate Public House and Chichester High School For Girls, among other places. For rail, the closest station is Chichester station, about 0.9 miles west of the centre. A little further out are 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.
Nearby places to Portfield
Other services in Portfield
What sealant work can’t fix
Part of a good diagnosis is knowing where sealant stops. You will hear from us if the cause turns out to be one of these:
- Frames that are rotten, warped or broken
- Glazing that needs replacing
- Masonry that has broken away beside the joint
If you’re not sure, just ring 01277 525 020 or email drawings and photos and we’ll give you a straight answer.
Where we work in Portfield
- Balcony and threshold joints
- Shopfronts below residential blocks
- External wall and movement joints
- Communal kitchens and washrooms
- Communal entrances and stairwells
- Window and door perimeters on blocks
Do you need mastic sealing in Portfield?
The edges of the material itself sometimes break away for example where render or brick edges crumble. We will tell you if the joint edges need repairing before resealing.
Most enquiries start with one or more of the following:
- No planned programme for sealant
- Water getting in round frames after rain
- Worn sealant at communal door frames
- Occupiers reporting cold air round windows
Schools and community buildings such as Portfield Primary Academy need frame and external mastic kept sound like any building.
Before you book anyone
- Will RAMS and insurance details be available?
- How long is the guarantee, and what does it include?
- Is the sealant right for the movement and the substrate?
- Who will actually carry out the work
Different surfaces, different methods
Communal areas
Low-level communal joints get damaged more than most, so they often need renewing sooner.
Planned maintenance
We can work into your cyclical maintenance plan, building by building.