West Sussex · England
Portfield Sand Mastic
Specialist sand mastic for Portfield: careful preparation, the right product and tidy work. Call for a quick quote.
- Gaps round a timber door in stone or brick
- Draughts and rain around sash boxes
- Cement or filler used on old window joints that has cracked
Landlord and commercial work in Portfield
We also work for property managers and facilities teams in Portfield and across West Sussex. Several sites can go on one quote, and we’re fully insured for the work.
If you manage several properties in or around Portfield, several properties can be quoted together. Send us the addresses and the work at each, and pictures by email help.
How we handle sand mastic in Portfield
Traditional burnt sand mastic blends with stone and brick surrounds. It’s a good fit for period properties where a modern sealant bead would stand out. We’re often asked to deal with failed mastic on an exposed elevation and tired mastic found when preparing windows for paint, across brick reveals, period & listed homes and stone surrounds.
Around Portfield, conservatories, garden rooms and patio doors are often part of the house. Those joints need the same attention as the main windows.
Our work is backed for twelve months, in Portfield and everywhere else we cover.
- Place
- Portfield (PO19, PO20, PO18)
- Wider area
- West Sussex
- Guarantee
- 12 months on all our work
- Price
- A clear quote up front
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
Windows and doors in Portfield
The South East is one of the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast. With historic houses such as Goodwood House (about 2.5 miles north) nearby, there’s older building stock in the area around Portfield as well as newer homes. Where a home is older, older timber frames in brick or stone need a different approach from a modern uPVC window.
In the older streets around St George's, frames set in older brick or stone need a sealant that suits the wall as well as the frame. If you let a flat or house near Chichester station, cracked sand mastic around sash windows lets in the draughts tenants complain about. If you look after a building such as Portfield Primary Academy, the mastic around its windows and doors needs looking after like any other building’s.
Portfield is about 1 mile east of Chichester, in West Sussex. For sand mastic in and around Portfield, it’s easy to get a quote: please phone 0345 464 0079 or send us an email. We cover West Sussex from our Crawley base. Portfield is one of 371 towns and villages in West Sussex where we work. We also work in Portsmouth, about 14 miles from Portfield.
We work across PO19, PO20 and PO18 for sand mastic. We cover properties on Kent Road, York Road and Spur Road. Portfield sits on or near the A259 and A285, which makes travel easy. We also cover the places around Portfield: 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).
Near you in Portfield
We work in homes and buildings around The Prebendal School, The East Gate Public House and Chichester High School For Girls and the streets around them. The closest station to Portfield 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). For a walk, there’s Kingley Vale National Nature Reserve and Stoke Down.
How the visit works
Most of a good job is in the preparation, and we don’t rush it. Joints are cleaned back and dried before anything new goes in. All told, the work takes a few hours for a single window, longer for several. In a smaller place like Portfield, parking is seldom the issue; lanes, gates and long drives are worth mentioning. If the job is outside, tell us about side access and how high the joints are.
- We start by checking each surround and agreeing the joints to renew.
- We rake out the old mastic and clean the joint.
- We pack any deep gaps so the mastic sits at the right depth.
- The mastic is mixed, pressed into the joint by hand and shaped.
- The mastic is finished to sit tidily against the stone or brick.
Getting ready for the visit
- On commercial sites, let us know about site rules
- Let us know about stairs, lifts or work at height
- Keep children and pets away from the work area
Get a quote
If you are in Portfield and need sand mastic, call 0345 464 0079 or send us an email. A short description of the job and where it is helps us quote, and we will agree the price before any work begins.
Advice
Towns and villages near Portfield
Also in Portfield
How we quote for sand mastic
We quote each job individually. These are the things that affect it:
- Access and height
- The number of rooms or windows
- Working hours on commercial sites
- The type of sealant required
Instead of a standard rate, we price the job in front of us: how many joints, what’s in them now and how we reach them. The price is agreed before we begin.
Asking for a quote
To help us quote quickly, let us know:
- The address or postcode of the job
- What’s wrong with the joints now
- If someone has resealed it before
- The type of property
We quote each job on its own, so the first step is telling us about yours. Simply ring 0345 464 0079 or send us an email and describe the job.
Can I do it myself?
The difference is mostly in the preparation and the product. We take joints back to clean, dry surfaces, and the sealant is matched to the joint and its conditions, and the work is guaranteed for a year.
Sealing over old silicone is the commonest DIY error. Silicone does not stick to old silicone, so it lifts and traps water and mould underneath. All the old material has to come out first.
Portfield questions
Is Portfield within the area you cover?
Yes, Portfield is covered. Our work covers London and the South East, and smaller places are part of that. The journey is planned ahead, so it helps to know about access.
Can you do sand mastic in Portfield?
Yes, Portfield is within the area we cover. Our work covers London and the South East. You can phone 0345 464 0079 or drop us an email and let us know what needs doing.
Is it possible to take out silicone and use sand mastic instead?
Often, yes. With the silicone removed and the joint cleaned, sand mastic is applied by hand.
Are you fully insured?
Yes. Mr Mastic is fully insured.
What sealant do you use?
We choose the sealant for the joint, not the other way round. Where it moves, gets wet or faces the weather makes a difference, and we’ll explain our choice.
Is the work guaranteed?
Our 12-month guarantee applies to all our work.
Will you leave a mess?
We keep the work tidy. We protect what’s around the joints, and the area is left clean when we finish.
Will there be a smell?
Possibly a little. It fades as the sealant cures, and ventilation helps.
What happens if it’s left?
New sash windows are a major, costly change and on a listed home, consent may be needed. Where the frames are in good order, new mastic seals the surround. 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.
Every job is a little different, so we quote each one individually. The number of joints, how easy they are to reach and the sealant needed all play a part, and we’ll explain the quote if you ask.
Why book with us
- Neat joints and a tidy finish
- 4.9 on Google from 180+ five-star reviews
- Approved under the ARBOMaster scheme
- Any old sealant cut out fully, not covered over
Take a look at how sealant jobs are priced or what customers say.
What we cannot put right
Some problems need a builder, plumber or other trade rather than us:
- Sash cords, weights and draught-proofing of the sashes
- Damaged stone surrounds
- Whether work needs listed building consent
If in doubt, ring 0345 464 0079 or drop us an email and we will say what we think before booking.
Surfaces we seal
- Period & listed homes
- Brick reveals
- Tenement windows
- Sash and case windows
- Timber door frames
- Stone surrounds
Looking after it afterwards
Good habits help new joints last longer. A few tips:
- Ask the planning authority about consent for listed or conservation-area homes
- Keep modern sealant off the mastic
- Plan mastic work ahead of painting
- Inspect the joints round the windows every year or so
Make sure water drains away from the window surround. Water sitting against the mastic shortens its life.
An open joint round the box lets weather through. The longer it’s left, the more the joint opens as more mastic falls out.