West Sussex · England
Sand mastic for sash & case windows in Aldwick, West Sussex
Problem with your window and door surrounds in Aldwick? We remove the old material, prepare the joints and seal them properly.
- Cement or filler used on old window joints that has cracked
- Wind and rain getting in round a sash window
- Mastic that needs renewing before redecorating
When to call us in Aldwick
Shallow joints are a common cause. A thin layer doesn’t hold well so we make sure the new mastic is the right thickness.
Common reasons people contact us are:
- Mastic worn away on windows facing the weather
- Gaps where the frame meets the masonry
- Mastic round period door frames that has failed
- Mastic that needs renewing before redecorating
If you look after a building such as Nyewood CofE Junior School, larger buildings have plenty of frames, and the mastic around each one ages.
What your quote should include
- Whether VAT is included
- Whether all the old sealant comes out first
- How the colour is chosen
- What happens if they find a problem under the old sealant
Sand mastic in Aldwick, done properly
We work across Aldwick renewing sand mastic on sash windows and doors. Every joint is cleaned out and filled by hand for a neat, traditional finish. If you have modern sealant on a period surround and gaps between timber frames and stone or brick, we can put it right, on brick reveals, timber door frames and sash and case windows alike.
Houses in smaller places like Aldwick can stand more in the open than those in a built-up town. The mastic around frames on those walls tends to age faster.
Every job is covered by our one-year guarantee.
- Where
- Aldwick (PO21)
- Wider area
- West Sussex
- Guarantee
- One year on every job
- Price
- Quoted before any work starts
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
Why act early in Aldwick
Not every filler suits an old window surround. Sand mastic is the like-for-like choice, which can matter on listed and conservation-area homes. In an older home around Aldwick, damp from a failed joint can get into timber and plaster, and that is a much bigger job than renewing the sealant.
The cost reflects the work involved, not guesswork. That is why we ask a few questions first.
Why choose Mr Mastic in Aldwick
- 20+ years of sealant experience
- We are fully insured
- We leave the area clean and tidy
- Every job guaranteed for a year
Read what affects the cost or customer reviews.
FAQs for Aldwick
Does the coastal weather in Aldwick affect outside sealant?
Near the coast, wind-driven rain and, nearer the shore, salt air make outside sealant work harder. Choosing the right sealant for the frame and wall, laid at the right depth, helps it last.
Do you work for landlords with property near Bognor Regis station?
Yes. We work for landlords and agents as well as homeowners, and several properties can go on one quote. Just ring 0345 464 0079 or send us an email with the address and what needs doing, and we will give you a clear quote.
Is there any odour?
That depends on the sealant. Some products have a noticeable smell, others very little.
Can you seal over the old sealant?
No. We remove every bit of old sealant first, so the new sealant bonds properly.
Do I have to be there?
We need access to the joints, so we will agree that with you when we book. For inside work, that normally means someone being in.
Can I paint the new mastic?
Sand mastic is normally left unpainted, as guidance on traditional windows advises. Ask us before decorating.
How long does the job take?
A typical job takes anything from a few hours to a full day, depending on how many windows. Your quote will say how long we expect yours to take.
How long does sand mastic take to harden?
It takes a while. The skin forms first, and the full set comes later, and we will tell you what to expect.
Surface by surface
Sash and case windows
A sash window’s box frame sits in the masonry opening. The gap round it is pointed with sand mastic.
Stone surrounds
We take care not to mark the stone while raking out the old mastic.
The process
A visit follows a simple pattern: we look at the joints together, mask and protect the surrounding surfaces, carry out the job and tidy away. It usually takes a few hours for a single window, longer for several. In a smaller place like Aldwick, 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 check each window surround and the condition of the joint.
- The joint is raked out and cleaned.
- We fill deep gaps so the new mastic is not too thick.
- New sand mastic is applied and shaped by hand.
- The finish is dressed neatly.
How to prepare
- Let us know about earlier repairs to the joints
- Clear items away from the joints we are working on
- Let us know about stairs, lifts or work at height
Ask for a quote
To get a quote, ring 0345 464 0079 or email us and tell us where the job is and what the problem looks like. You will have a clear quote before work begins.
Advice
Should I try it myself first?
Not every job suits DIY: work at height, external movement joints, fire-rated sealant and large areas need the right product, the right access and the right method.
A careful DIYer can reseal a simple joint, like a short, easy-to-reach joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
What affects the cost of sand mastic
There’s no set price list, because jobs vary so much. The quote depends on:
- The size of the job
- Any mould that needs treating
- When we can work, for business premises
- The old material and how stubborn it is
The cost depends on how much there is to do, how much old material has to come out and access to the work. You’ll have a clear quote before any work starts, so you know where you stand.
Helping us quote
Before you ask for a quote, have a think about:
- The type of property
- Photos by email, if that is easy
- What the problem is, such as mould, gaps, leaks or cracking
- How many joints, rooms or windows are involved
The more we know about the job, the more useful the quote. Let us know the location, the problem and roughly how many joints.
Sand mastic in Aldwick: local notes
Aldwick is within about 1 mile of the coast, where wind-driven rain is a fact of life and, nearer the shore, so is salt air. Both are hard on the mastic around older windows and doors, which can dry out and crack sooner where a building faces the weather. Rainfall in the South East is lower than in much of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
Rented homes near Bognor Regis station change hands often, and cracked sand mastic around sash windows lets in the draughts tenants complain about. Homes close to St Richard’s Church include some older properties, and the joint between an old wall and a newer frame is generally the first place rain gets in.
Aldwick is about 1 mile south-west of Bognor Regis, in West Sussex. Wherever you are in the PO21 postcode area, we can carry out sand mastic at your property. Aldwick is one of 371 places in West Sussex we cover. Our Portsmouth page covers work nearby.
Our applicators cover all of the PO21 postcode area for sand mastic and the streets around it. Whether your property is on Fish Lane, Dark Lane and West Avenue or a nearby road, our applicators can take on the job. We also cover Nyetimber (1 mile west), Pagham (2 miles south-west), South Mundham (2 miles north-west), Fisher (3 miles north-west) and Sidlesham (3 miles west). We also work in nearby towns such as Worthing (14 miles east), Chichester (5 miles north-west), Selsey (5 miles south-west), Littlehampton (8 miles east), Emsworth (11 miles north-west) and Rustington (9 miles east).
Landmarks near Aldwick
We work in homes and buildings around West Park, The Regis School and The Regis School. The nearest railway station is Bognor Regis station, roughly 1.4 miles east of the centre. Other landmarks nearby include Bognor Regis War Memorial Hospital (1.5 miles north-east) and Bognor Regis Museum (1.2 miles east).
What we can’t put right
We won’t take on work that won’t last, so here’s what sealant cannot put right:
- Cracked or broken glass
- Timber that has rotted
- Damaged stone surrounds
If you’re not sure, just phone 0345 464 0079 or email us and we’ll give you a straight answer before you book.
Surfaces we seal
- Stone surrounds
- Sash and case windows
- Period & listed homes
- Brick reveals
- Timber door frames
- Tenement windows