Hampshire · England
External & façade joints in East Harting, Hampshire
External mastic across East Harting and nearby, with every bit of old sealant taken out first and a 12-month guarantee.
- Failed seals between different materials
- Damp patches traced to an open external joint
- Movement joints with cracked, split or missing sealant
External mastic for homes and businesses in East Harting
As ARBOMaster approved applicators, we choose exterior sealants to suit the joint and the surfaces. Some surfaces need a primer before sealing, and we do not skip that step. If you are dealing with failed seals between different materials and leaking joints around cladding and façade panels, we can help.
Somewhere as small as East Harting, homes and farm buildings often face open ground, so walls and rooflines take the full force of wind and rain. Gutter joints and wall joints there need a sealant that can flex and stay put.
A 12-month guarantee comes with the work, just as it does everywhere we cover.
- Location
- East Harting (GU31)
- Region
- Hampshire
- Cover
- 12 months on all our work
- Quotes
- A clear price before any work starts
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
What external mastic looks like in East Harting
With historic houses such as Uppark (about 1.7 miles south-west) nearby, there’s older building stock in the area around East Harting as well as newer homes. Where a home is older, older walls and rooflines need a sealant that moves with them and suits the material. The South East is one of the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
In the older streets around The Parish Church of St Mary & St Gabriel, older walls, gutters and the joints where extensions meet them need a flexible sealant. For landlords with property near Petersfield station, failed wall and movement joints let damp in, so they’re worth checking between tenancies.
East Harting is about 4 miles south-east of Petersfield, in Hampshire. Across the GU31 area, we can carry out external mastic at your property. Our Hampshire coverage runs to 683 places, and East Harting is one of them. Our Portsmouth page covers work nearby.
Every address in GU31 is within our area for external mastic. Local streets include Hollist Lane, East Harting Street and Orchard Close, all of which we cover. We also cover South Harting (1 mile west), Nyewood (1 mile north), Elsted (1 mile east), Elsted Marsh (2 miles east) and Dumpford (2 miles north-east). Within a short drive, we also cover Havant (9 miles south-west), Horndean (8 miles south-west), Alton (13 miles north), Waterlooville (10 miles south-west), Petersfield (4 miles north-west) and Purbrook (10 miles south-west).
Local landmarks in East Harting
Typical jobs here are in homes near The Ship Inn, among other places. East Harting’s nearest station is Petersfield station, about 4.1 miles north-west. Other landmarks nearby include Petersfield Community Hospital (4.1 miles north-west) and Bear Museum (3.7 miles north-west). Open spaces near East Harting include Iping and Stedham Commons and Oakham Hill.
Signs you need external mastic in East Harting
If plants are growing out of a joint, the sealant has usually failed or was never there. Dirt and roots then trap moisture in the joint and make things worse.
Most people get in touch after spotting one of these:
- Joints with sealant missing in places
- Water getting into walls through failed joints
- Movement joints filled with mortar instead of sealant
- Panel joints letting water in
Managing a site like Harting CofE Primary School? Then its movement joints, gutters and trims need looking after like any other building’s.
Comparing quotes
- Whether all the old sealant comes out first
- What happens if the job turns out different
- Whether the sealant suits the joint
- What insurance they hold
Questions from East Harting
Is East Harting in your area for external mastic?
Yes. Our work covers London and the South East, and East Harting is part of that. You can phone 0345 464 0079 or drop us an email and let us know what needs doing.
Do you cover smaller places like East Harting?
Yes, we do. Our work covers London and the South East, and smaller places are part of that. Longer journeys are simply planned in advance.
Which products do you use?
Quality sealants from brands including Arbo and Everbuild, chosen to suit the joint. We explain the product when we quote.
Can tenants book the work?
We can work for tenants, landlords or agents. Get your landlord’s agreement first.
What does external mastic cost?
Size, access and the old material all affect the cost. Ask us for a quote.
Can you seal joints between render and window frames?
Yes. The old joint is removed, both surfaces cleaned and primed where needed, and a flexible sealant applied. We pick a colour that works with both materials.
Is it worth trying it myself?
Sometimes. The key is preparation: remove all the old material and work on a clean, dry joint. We can always put it right if it fails.
How long will you be here?
A typical job takes a few hours to a few days, depending on the length of joint and the access, including the preparation. Your quote will say how long we expect yours to take.
Why it’s worth doing now in East Harting
Low-modulus sealants stretch easily, so they put less strain on the joint edges. That matters on brick, render and concrete, which can be weaker at the face. Too stiff a sealant can pull at the edges and break them. Where a wall is exposed, as many are in small places like East Harting, wind-driven rain gets into any failed joint, and older walls, once damp, take a long time to dry.
Instead of a standard rate, we look at what your job involves: the amount of work, the old material and the access. You’ll know the price before we begin.
Why choose Mr Mastic in East Harting
- We leave the area clean and tidy
- White, clear, grey or another colour, product permitting
- Any old sealant cut out fully, not covered over
- 20+ years of sealant experience
Take a look at our cost guide and our reviews.
What the job involves on each surface
Joints between dissimilar materials
Where a frame or panel meets masonry, water often finds a way in. We cut out the old sealant and reseal with a product suited to both surfaces.
Copings and trims
A failed coping joint lets water into the top of the wall. Sealing them early saves the wall below.
For landlords and businesses
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.
Housing providers, facilities teams and property managers book us too in East Harting and across Hampshire. We can quote a run of properties together, and we’re fully insured.
What affects the quote in East Harting
Jobs vary more than people expect. The main factors:
- How much old sealant there is and how hard it is to remove
- Working hours on commercial sites
- How much there is to do
- How easy the joints are to reach
There are no prices on our website, because each job is priced on what it involves. For a quick quote, please phone 0345 464 0079 or email us.
Helping us quote
You do not need to know the technical terms. Just tell us:
- The address or postcode of the job
- If it’s domestic, commercial or a hotel
- Whether it has been sealed before
- What’s wrong with the joints now
For a quote, phone 0345 464 0079 or send us an email with the location and a short description of the problem. We’ll give you a clear quote before any work starts.
How to look after the new joints
No joint lasts for ever, but care makes a real difference. A few tips:
- Don’t let climbing plants root in the sealant
- Check external joints each spring
- Keep water from gutters off the wall
- Act on the first splits you see
Only paint over the joint if we’ve confirmed the sealant can take paint. Paint can crack on a flexible joint.
Water getting behind cladding or render can go unnoticed for a long time. By the time there’s a damp patch, the damage can be well established.
How the visit works
We work through the job in order: protection first, then preparation, sealing and a tidy-up. Typically it takes anything from a few hours to several days, depending on the building, and the area is left clean. Somewhere like East Harting needs a little journey planning: let us know about lanes, gates and parking. Everything for the job comes with us, so a second trip is avoided where possible.
- We start by walking round the building and agreeing the joints and the access.
- We cut out the old mastic and rake out anything in the joint.
- Joint faces are cleaned back and primed if the sealant needs it.
- We fit closed-cell backing rod to control the depth.
- The exterior sealant is applied, tooled and checked along its length.
Getting ready for the visit
- Tell us if parking is tricky
- Clear the area around the work
- Tell us about any water getting in
How to get a quote
Every job is quoted individually, so start by telling us what you need. Just phone 0345 464 0079 or email us with the details.