Isle of Wight · England
External Mastic in Shide
Specialist external mastic for Shide: the right sealant, proper preparation and a neat finish. Ask us for a quick quote.
- Damp patches traced to an open external joint
- Weathered mastic that no longer stretches
- Weeds or debris growing in open joints
FAQs for Shide
Is Shide within the area you cover?
Yes, Shide is covered. We work across London and the South East, and smaller places are part of that. The journey is planned ahead, so it helps to know about access.
What guarantee comes with external mastic in Shide?
Every job comes with our 12-month guarantee, wherever it is. We’re also fully insured and ARBOMaster approved.
Why do you put foam in the joint first?
That’s backing rod, a closed-cell foam. It keeps the sealant at the right depth and bonded to the sides only, which would stop it stretching.
What do you put in the joint?
It depends on the joint: anti-fungal sanitary silicone in wet areas, and other sealants where joints move or face the weather. We use products from Arbo and Everbuild.
Do you take out the old sealant first?
Always. Sealing over old sealant is the main reason resealing fails early, so we never do it.
Can you quote for more than one area?
Of course. Doing several areas at once is normally more efficient, so mention them when you ask for a quote.
Are you ARBOMaster approved?
Yes. We’re an ARBOMaster approved applicator.
Where is Mr Mastic based?
Our base is in Crawley, West Sussex, and we cover South East England, London and all of Scotland.
External mastic in Shide
External mastic is a job where short cuts show quickly. Overfilled joints, missing backing rod and sealant laid over old sealant all tend to fail early. We strip the joint back and start again. We’re often asked to deal with leaking joints around cladding and façade panels and old sealant gone brittle and cracked, on copings & trims, brickwork movement joints and joints between brick and frames.
Homes around Shide range from older cottages to newer houses, with walls and rooflines of every type. Older homes need their gutter and trim joints kept tight, newer ones their movement joints.
Every job is covered by a 12-month guarantee.
- Where
- Shide (PO30)
- Region
- Isle of Wight
- Cover
- One year on every job
- Quotes
- A clear price before work begins
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
What happens on the day
We bring everything the job needs with us. Once we have agreed what’s being done, the area is protected and the work begins. Most jobs take anything from a few hours to several days, depending on the building. In a smaller place like Shide, parking is seldom the issue; lanes, gates and long drives are worth mentioning. For outside work, side access and the height of the joints help us plan.
- We start by walking round the building and agreeing the joints and the access.
- Every bit of old sealant and any mortar or debris is cut out.
- The faces are brushed clean and primed where the product requires it.
- Backing rod sized to the joint goes in to set the depth.
- We apply the sealant, tool it and check the whole run.
Getting ready for the visit
- Tell us about any water getting in
- On commercial sites, let us know about site rules
- Let us know about parking restrictions
Ask for a quote
There’s no standard price list, as no two jobs are quite the same. Instead, we give you a clear quote for your job. To get started, ring 0345 464 0079 or send us an email.
Related advice
What affects the cost of external mastic
You’ll get a clear quote before we start. It’s based on:
- The old material and how stubborn it is
- How easy the joints are to reach
- Whether there’s mould to deal with
- How many areas need sealing
Doing several joints on one visit is generally more efficient than separate visits, so it’s worth mentioning everything you’d like done. We’ll give you a clear price for the lot.
What to tell us for a quote
What to tell us when you ask for a quote:
- If someone has resealed it before
- The problem you’ve noticed
- Pictures of the joints, sent by email
- If it’s domestic, commercial or a hotel
Want a quote for external mastic? Please phone 0345 464 0079 or drop us an email with a few details. You will know what we plan to do, and what it will cost, before any work begins.
Outside joints around Shide
Historic houses like Carisbrooke Castle (about 1 mile west) are a reminder that the area around Shide has older buildings as well as new. In older buildings, older brick and stone need a sealant that suits them, at the right joint depth. London and the South East are among the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
If you look after a building such as Nine Acres Primary School, its movement joints, gutters and trims need looking after like any other building’s.
Shide is about 1 mile south-east of Newport, in the Isle of Wight. Whether you are in the middle of Shide or further out, we cover external mastic for every kind of property. Shide is one of 125 places in the Isle of Wight where we work. We also work in Portsmouth, around 12 miles away.
Postcode districts we cover here for external mastic: PO30. That includes homes and businesses on Pan Lane, Ash Road and Dairy Lane. With the A3020 close by, Shide is easy for our applicators to reach for external mastic. We also cover Newport (1 mile north-west), Blackwater (1 mile south), Downend (2 miles east), Merstone (3 miles south-east) and Rookley (3 miles south). Larger places within reach include Ryde (6 miles east), Cowes (5 miles north), Sandown (6 miles south-east), Shanklin (7 miles south-east), Ventnor (8 miles south-east) and East Cowes (4 miles north). If you’re somewhere remote, the job takes a little more planning.
Landmarks near Shide
We work in homes and buildings around Christ The King College, The Cranbourne Arms Public House and Island Innovation VI Form Campus and the streets around them. Nearby you will also find St Mary's Hospital (1.3 miles north) and Carisbrooke Castle (1 mile west). Not far away are Mill Hill and Briddlesford Nature Reserve.
Signs you need external mastic in Shide
Sunlight, wet weather and frost wear exterior sealant down. In time it goes hard, crazes on the surface and stops stretching, so the joint eventually tears or comes away from one side.
The most common problems we see are:
- Failed sealant between panels on a façade
- Joints pointed up with cement by mistake
- Sealant pulling away from one side of the joint
- Joints with sealant missing in places
In the older streets around Church of St. John the Baptist, old and new materials meet at the roofline and walls, which is where sealant earns its keep.
Comparing quotes
- How the surfaces are prepared before sealing
- How much experience the applicator has
- The length of the guarantee
- Is the old sealant removed completely?
Can I do it myself?
A careful DIYer can reseal a simple joint, like a short, easy-to-reach joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
Sealing over old silicone is the commonest DIY error. New silicone will not bond to old, so it lifts and traps water and mould underneath. Everything old must be removed first.
Other services in Shide
What the job involves on each surface
Brickwork movement joints
Clay brickwork grows slightly over its life and moves with the weather. The movement joint takes that up, so its sealant has to stay flexible.
Concrete and blockwork
Wide joints in concrete need the depth controlling carefully. We size the backing rod to the gap.
Honest limits
Before booking, it’s worth knowing the limits too:
- Walls that need new movement joints cut into them
- Damp from another source, such as a leaking gutter or a bridged damp-proof course
- Render that is blown, hollow or coming away
If in doubt, phone 0345 464 0079 or send us an email and we’ll say what we think before you book.
What we seal
- Render & cladding joints
- Façade panels
- Copings & trims
- Concrete & block
- Joints between brick and frames
- Brickwork movement joints
Landlords, agents and businesses in Shide
Hotels need rooms back in use, so the work can be planned room by room. We’ve worked in hotels as well as homes and businesses.
Businesses can book us for washrooms, kitchens, offices and more. On commercial sites, working times can be discussed when we quote.