West Sussex · England
Window & door mastic in Somerley, West Sussex
We cover Somerley for mastic around window and door frames, sills and patio doors. Old sealant removed completely, joints prepared properly and a 12-month guarantee.
- Gaps left after new windows were fitted
- A bead that does not match the frame
- Hard, cracked sealant around windows
Your questions about window mastic in Somerley
Is Somerley within the area you cover?
Yes, smaller places are covered as well as towns. We work across London and the South East. Just mention lanes, gates or anything else about the route when you book.
Does the coastal weather in Somerley affect outside sealant?
Near the sea, outside joints face more wind, rain and salt than they would inland, so the choice of sealant and the preparation matter even more. It’s worth checking the walls that face the sea first.
Do you have sealant for grey or black windows?
Yes. White, brown, anthracite grey, black and clear sealants are all available, so the joint suits the frame.
Can you reach windows above the ground floor?
Yes, as long as they can be reached safely. Tell us about access when you get in touch and we will plan for it.
Can you quote for more than one area?
Of course. Combining jobs makes good use of the visit, so mention them when you ask for a quote.
Are you ARBOMaster approved?
Yes. We are an ARBOMaster approved applicator, which is run for the Arbo sealant brand.
Are you insured?
Yes. Mr Mastic is fully insured.
Should I try DIY first?
That depends on the joint. Work at height, movement joints, fire-rated gaps and large areas are best left to a professional, while a short indoor joint may be within reach.
About our window mastic in Somerley
A window frame and the wall around it expand and shrink at different rates. Plastic and aluminium frames move with the temperature, while masonry stays fairly still. So the sealant has to stretch and recover, which is why we use a low-modulus product. Common call-outs are for cold air getting in at the frame edge and untidy mastic left by window fitters, across window sills, composite doors and aluminium frames.
Mastic can only go onto a dry, clean joint, so window work in Somerley is booked around the forecast. Let us know about access to all the frames, upstairs ones included.
All of our work is guaranteed for twelve months.
- Where
- Somerley (PO20)
- Region
- West Sussex
- Guarantee
- One year on every job
- Quote
- Quoted before any work starts
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
What affects the cost of window mastic
For a quick quote, just ask. The main things that affect it are:
- Whether old sealant or filler has to be cut out
- Any mould that needs treating
- The number and length of the joints
- How many areas need sealing
Doing several joints on one visit is generally more efficient than separate visits. We will give you a clear quote for the lot.
Asking for a quote
Photos by email are helpful but not essential. Try to tell us:
- How we’d reach the joints
- Whether it’s a home or a business
- Roughly how big the job is
- Photos by email, if that is easy
We quote each job on its own, so the first step is telling us about yours. Just phone 0345 464 0079 or email us with the details, and photos are welcome.
How the job changes by surface
Timber windows & doors
Soft or rotten wood can’t be sealed successfully. We’ll point out any rot we find, as a joiner will need to deal with it.
Patio & French doors
Door frames take knocks and movement every time the doors are used. A flexible sealant copes with that, where a rigid one would crack.
What we cannot put right
It helps to know what we can’t do too:
- A failed sealed unit that has misted up
- Damp problems in the wall away from the window
- Worn gaskets, brush seals or a door that has dropped
Not sure which it is? You can phone 0345 464 0079 or drop us an email and we’ll tell you honestly before booking.
Joints and surfaces we work on
- Patio & French doors
- uPVC windows
- Window sills
- Composite doors
- Aluminium frames
- Timber windows & doors
Nearby places to Somerley
More services for Somerley
How it works
There isn’t much for you to do on the day. Point us to the joints and we will get on with it. The work itself takes most of a day for a typical house, less for a few frames. In a small place like Somerley, access is usually the main thing to plan. For outside work, also let us know about exposed walls and any outbuildings involved.
- We check how each frame can be reached safely.
- Old, cracked mastic is removed completely, along with any loose debris.
- The surfaces are cleaned and left dry.
- Deep voids are backed, then the sealant is gunned in.
- We tool the joint so water runs off, then clear up.
How to prepare
- Try not to wet indoor joints just before the visit
- Let us know about earlier repairs to the joints
- Let us know about parking restrictions
Getting a quote
We don’t publish a price list, as no two jobs are quite the same. Instead, your job gets its own clear quote. To get started, ring 0345 464 0079 or send us an email.
Related advice
Common problems we fix in Somerley
Older frames were often sealed with products that set hard. Once it’s rigid, every bit of frame movement pulls at it, leaving a hairline gap down one side.
The most common problems we see are:
- Black, perished sealant on frames
- White mastic on grey or black frames
- Water coming in at the bottom corners of a door
- Whistling draughts around closed windows
If you live in an older home near St James' Church, frames set in older brick or stone need a sealant that suits the wall as well as the frame.
Comparing quotes
- Which sealant they’ll use, and why
- Whether all the old sealant comes out first
- Whether VAT is included
- What guarantee comes with the work
Windows and doors in Somerley
Somerley is within about 2 miles of the coast, where wind-driven rain is a fact of life and, nearer the shore, so is salt air. That’s hard on the mastic around window and door frames, especially on the side facing the sea. London and the South East are among the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
Rented homes near Fishbourne station change hands often, and renewing tired window mastic between tenants heads off draught and damp complaints. For site and facilities teams at buildings such as Birdham CE Primary School, the mastic around its windows and doors needs looking after like any other building’s.
Somerley is about 4 miles north-west of Selsey, in West Sussex. Every kind of property in Somerley can book us for window mastic. Every job comes with our 12-month guarantee. Across West Sussex, we cover 371 places, and Somerley is one of them. Portsmouth is on our list too, about 10 miles from Somerley.
Here we cover the PO20 postcode area for window mastic. If you need window mastic at a property on Bell Lane and Hundredsteddle Lane or anywhere close by, we can help. We also cover the places around Somerley: Almodington (1 mile south-east), Birdham (1 mile north-east), Shipton Green (1 mile north-west), Earnley (1 mile south) and East Wittering (2 miles south-west). We also work in nearby towns such as Bognor Regis (7 miles east), Chichester (5 miles north-east), Selsey (4 miles south-east), Littlehampton (14 miles east), Emsworth (6 miles north-west) and Rustington (15 miles east).
Local landmarks in Somerley
Around Somerley, our work takes us to homes and buildings near The Birdham Public House and the streets around them. Somerley’s nearest station is Fishbourne station, about 4 miles north of the centre. Other landmarks nearby include Chichester Castle (4.9 miles north-east) and St Richard's Hospital (5.2 miles north-east). Open spaces near Somerley include Pilsey Island.
For landlords and businesses
Hotels need rooms back in use, so the work can be planned room by room around your bookings where we can. Hotel work is part of what we do, alongside homes and businesses.
Mouldy or split sealant often shows up at the end of a tenancy. Several properties can go on one quote.
What happens if it’s left?
Draughts and leaks don’t always mean new windows. If the frames and glass are in good order, resealing the joints is often all that’s needed. Problems with the glass or gaskets are for a window company, and we’ll say so. Where a wall is exposed, as many are in small places like Somerley, wind-driven rain gets into any failed joint, and damp in older walls is slow to dry out.
Instead of a standard rate, we look at what your job involves: how many joints, what’s in them now and how we reach them. You will know the price before we begin.
What you get with us
- Anti-fungal silicone where joints get wet
- Homes, businesses and hotels
- We’re fully insured
- Approved under the ARBOMaster scheme
Take a look at our cost guide and customer reviews.