West Sussex · England
Window Mastic in Birdham
Professional window mastic in and around Birdham, with every bit of old sealant taken out first and a 12-month guarantee.
- Gaps between the frame and the inside reveal
- White mastic on grey or black frames
- Old mastic that has gone black or come away
What the job involves on each surface
Timber windows & doors
Wood swells when it’s wet and shrinks when it dries, so the joint must stay flexible. We seal onto sound, dry paintwork or timber.
Window sills
Every drop off the glass ends up on the sill, so the joints at each end and underneath matter. They’re cut out and resealed with exterior sealant.
Window mastic for homes and businesses in Birdham
Mr Mastic’s applicators have more than 20 years’ experience with window and door sealants. We are ARBOMaster approved and fully insured, and every job is covered by a 12-month guarantee. We work on uPVC windows, timber windows & doors and composite doors, and people most often call us about gaps between the frame and the inside reveal and rushed sealant from a window installation.
Mastic can only go onto a dry, clean joint, so window work in Birdham is booked around the forecast. Tell us about access to every side of the house, including upper-floor windows.
All of our work is guaranteed for twelve months, in Birdham and everywhere else we cover.
- Where
- Birdham (PO20)
- Wider area
- West Sussex
- Guarantee
- A year, on every job
- Quote
- A clear price before any work starts
- Call
- 0345 464 0079
- Updated
- 26 October 2026
Keeping the joints in good condition
No joint lasts for ever, but care makes a real difference. Our tips:
- Wipe condensation off the frames
- Repaint timber before it’s bare
- Walk round the house once a year and look at the joints
- Keep paint off silicone joints
Timber frames need their paint kept up, since wood that gets wet swells and shrinks more. Keep paint off the silicone itself.
A small gap around a frame only grows. As old mastic keeps shrinking, the gap widens, and heat escapes around the frame. Resealing closes it.
What affects the quote in Birdham
Every job gets its own quote. These are the things that affect it:
- When we can work, for business premises
- Access and height
- Which sealant suits the joint
- How much old sealant there is and how hard it is to remove
Doing several joints on one visit usually makes better use of the time than several visits, so it’s worth mentioning everything you’d like done. You’ll get one clear quote for the whole job.
Asking for a quote
Photos by email are helpful but not essential. Try to tell us:
- The rough size of the job
- What the problem is, such as mould, gaps, leaks or cracking
- Any access issues, like height or stairs
- Whether it’s a home or a business
If you are in Birdham and need window mastic, ring 0345 464 0079 or send us an email. Tell us what the problem is and where, and you will get a clear quote before any work starts.
Should I try it myself first?
If you are set on DIY, put the effort into preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it fails, we can still redo it.
Not every job suits DIY: high-level joints, fire-rated gaps, external movement joints and big jobs need the right product, the right access and the right method.
When it is not the sealant
To be straight with you, there are a few things sealant will not fix:
- Soft or decayed wood in the frame
- Draughts through the window seals rather than the frame
- Penetrating damp from a failed cavity tray or render
If in doubt, ring 0345 464 0079 or email us and we will say what we think before booking.
Where we work in Birdham
- Window sills
- Timber windows & doors
- Aluminium frames
- Patio & French doors
- uPVC windows
- Composite doors
Windows and doors in Birdham
Birdham is close to the coast, and homes near the sea take more wind-driven rain, with salt in the air closer to the shore. That is hard on the mastic around window and door frames, especially on the side facing the sea. 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.
If you live in an older home near St James' Church, the joint between an old wall and a newer frame is usually the first place rain gets in. Schools such as Birdham CE Primary School are buildings too, and the mastic around its windows and doors needs looking after like any other building’s. Letting a property close to Fishbourne station? Then sound mastic around windows and doors keeps out the draughts and damp that tenants notice first.
Birdham is about 4 miles south-west of Chichester, in West Sussex. Across the PO20 area, we cover window mastic for homes and businesses. Our West Sussex coverage runs to 371 places, and Birdham is one of them. We also work in Portsmouth, around 11 miles away.
Our applicators cover all of the PO20 postcode area for window mastic. Local streets include Old Common Close, Main Road and Walwyn Close, and we cover them all. Other places close to Birdham include Somerley (1 mile south-west), Almodington (1 mile south), Shipton Green (1 mile west), Highleigh (2 miles south-east) and Earnley (2 miles south). Within a short drive, we also cover Bognor Regis (6 miles east), Chichester (4 miles north-east), Selsey (5 miles south-east), Littlehampton (13 miles east), Emsworth (6 miles north-west) and Rustington (14 miles east).
Local landmarks in Birdham
Typical jobs here are in homes near The Birdham Public House and the streets around them. For rail, the closest station is Fishbourne station, about 3.3 miles north of the centre. A little further out are Chichester Castle (4.1 miles north-east) and St Richard's Hospital (4.4 miles north-east). The countryside around Birdham includes Pilsey Island.
How it works
The work is kept neat and contained to the area we are working on, so you can get on with your day. Expect the work to take a few hours for a few frames, or a day or more for a whole house. For a village or hamlet like Birdham, the journey is planned in advance: let us know about lanes, gates and parking. We bring what the job needs, so it can be finished in one trip where possible.
- We check each frame and agree which ones need doing.
- Next the failed sealant is cut away and the joint cleaned.
- We fit backing rod in deep gaps so the sealant is the right depth.
- A flexible, weatherproof sealant is applied in a colour to suit the frame.
- We clear up and check every joint is fully closed.
Getting ready for the visit
- Move anything stored near the joints
- Plan for the work area to be out of bounds to pets and children
- Where the joints are inside, avoid wetting them before we arrive
Ask for a quote
Getting a quote is simple: tell us what needs doing and where, and roughly how big it is. Photos by email help us understand the job, and we’ll come back to you with a quote.
Advice
Common questions in Birdham
Do you cover smaller places like Birdham?
Yes, Birdham is covered. We work across London and the South East, and smaller places are part of that. Longer journeys are simply planned in advance.
Does living near the coast affect window mastic in Birdham?
Near the coast, wind-driven rain and, nearer the shore, salt air make outside sealant work harder. The right product, a clean joint and the right depth all help it cope.
Is it worth trying it myself?
It depends on the job. 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.
What sealant do you use?
It depends on the joint: sanitary silicone where it gets wet, and sealants suited to movement or weather elsewhere. Brands we use include Arbo and Everbuild.
How long does it take to reseal the windows on a house?
Allow most of a day for a typical house, less for a few frames. Access and the amount of old mastic make the biggest difference.
Can you reach windows above the ground floor?
Yes, as long as they can be reached safely. Let us know about access when you ask for a quote so we can plan the job.
Is the new sealant paintable?
Not generally, if it’s silicone. We choose the product with your decorating in mind, so mention it when you book.
Can you work on commercial sites?
Yes. We’ve worked for hotels, offices and other businesses and we are fully insured.
Also in Birdham
Work for landlords, hotels and businesses
If you manage several properties in or around Birdham, several properties can be quoted together. Just tell us the addresses and what each one needs, and photos by email help.
Hotels need rooms back in use, so we plan the work room by room. Hotel work is part of what we do, alongside homes and businesses.