Hampshire · England
External Mastic in Itchen Abbas
External mastic in Itchen Abbas from a team with over 20 years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Gaps where render, brick and frames meet
- Hard, crazed mastic that has stopped moving
- Failed sealant between panels on a façade
About our external mastic in Itchen Abbas
Joints in render and cladding are easy to overlook until a damp patch appears. We inspect them, agree which need doing and reseal with a weatherproof, flexible sealant. We are often asked to deal with panel joints letting water in and plants rooting in failed movement joints, on concrete & block, copings & trims and façade panels.
Outside joints can only be sealed when they’re dry, so work in Itchen Abbas is booked around the forecast. Let us know about access to every wall, plus any garages or outbuildings.
Every job comes with our 12-month guarantee.
- Location
- Itchen Abbas (SO21)
- Wider area
- Hampshire
- Guarantee
- One year on every job
- Quotes
- A clear price before work begins
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
What affects the quote in Itchen Abbas
For a quick quote, just ask. The main things that affect it are:
- The size of the job
- When we can work, for business premises
- Mould in or behind the old joints
- The type of sealant required
A failed joint rarely gets cheaper to fix by waiting. If you’re unsure, phone 0345 464 0079 or send us an email and we will give you an honest view and a quote.
Asking for a quote
When you call or email, it’s useful to know:
- What the problem is, such as mould, gaps, leaks or cracking
- Pictures of the joints, sent by email
- The rough size of the job
- Whether it’s a home or a business
For external mastic in Itchen Abbas, call 0345 464 0079 or drop us an email. A short description of the job and where it is helps us quote, and we will agree the price before any work begins.
How to look after the new joints
So the new joints stay in good condition:
- Keep high-pressure jets off the joints
- Deal with leaking gutters that soak the joints below
- Tell anyone working on the walls about the movement joints
- Have failed joints looked at early
Look over the joints once a year, ideally after winter. Watch for splits, edges coming away or growth in the joint.
Leaks behind façade panels and render often go unseen. By the time there’s a damp patch, the damage can be well established, so it’s worth resealing at the first signs.
Surface by surface
Brickwork movement joints
Vertical joints in long brick walls let the brickwork expand without cracking. We reseal them with a low-modulus sealant over backing rod in a colour to suit the brick.
Render joints
Rendered walls have joints at beads, openings and changes of material. They’re resealed in a sealant that suits the render.
Landlords, agents and businesses in Itchen Abbas
Whether it’s one flat or a portfolio, you get the same standard of work: old sealant fully removed, joints prepared properly and a 12-month guarantee.
Letting agents often deal with us directly. Send the address, what’s needed and the access arrangements and we’ll give you a quote.
Signs you need external mastic in Itchen Abbas
Some movement joints have been pointed up with mortar by mistake. With the joint locked solid, the movement turns into cracks elsewhere in the wall.
The most common problems we see are:
- Joints with sealant missing in places
- Plants rooting in failed movement joints
- Gaps where render, brick and frames meet
- Joints where the bead has come unstuck
If you let a flat or house near Winchester station, outside joints that have cracked can let damp into a rental, so check them between lets.
Questions to ask before booking
- Whether all the old sealant comes out first
- How much experience the applicator has
- How long the guarantee is
- Whether they’re fully insured
Also near Itchen Abbas
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FAQs for Itchen Abbas
Will you come out to Itchen Abbas?
Yes, we do. We work across London and the South East, from towns to the smallest places. Longer journeys are simply planned in advance.
Do you cover Itchen Abbas for external mastic?
Yes, Itchen Abbas is within the area we cover. We work across London and the South East. Just call 0345 464 0079 or send us an email with a few details of the job.
What sealant do you use?
Quality sealants from brands including Arbo and Everbuild, chosen to suit the joint. We explain the product when we quote.
I’m a tenant. Can you help?
We’re happy to deal with the tenant, landlord or agent. Get your landlord’s agreement first.
Why is there a gap in my brick wall?
A vertical gap in a long brick wall is normally a movement joint. It lets the bricks expand without cracking and needs a flexible seal, not mortar.
Is there any odour?
Possibly a little. Any smell clears as the sealant cures, and ventilation helps.
Can you seal over the old sealant?
No, it won’t last. It may look fine at first, but the new bead soon lifts. The old sealant has to come out completely.
How long does external mastic take?
Most jobs take a few hours to a few days, depending on the length of joint and the access, including preparation and clearing up. We will confirm how long when we quote.
What we do, step by step
On the day, there’s very little for you to do. Point us to the joints and we’ll get on with it. The job generally takes a few hours to a few days, depending on the length of joint and the access, including the tidy-up. In a small place like Itchen Abbas, access is normally the main thing to plan. For outside work, also let us know about exposed walls and any outbuildings involved.
- First, the joints are inspected and the access agreed.
- 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.
- Backing rod sized to the joint goes in to set the depth.
- We apply the sealant, tool it and check the whole run.
How to prepare
- Let us know about parking restrictions
- Move anything stored near the joints
- Mention any leaks or damp you’ve noticed
Getting a quote
To get a quote, call 0345 464 0079 or send us an email with the location and a short description of the problem. You will have a clear quote before any work starts.
Related advice
Itchen Abbas buildings and the weather
London and the South East are among the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
For site and facilities teams at buildings such as Itchen Abbas Primary School, movement joints, cladding joints and gutters on larger buildings need the same care as a house’s. For an older house near a landmark such as Church of St John the Baptist, an extension built onto an older house moves differently, and the joint between them takes the strain.
Itchen Abbas is about 4 miles north-east of Winchester, in Hampshire. Anywhere in SO21, we cover external mastic for homes and businesses. Itchen Abbas is one of 683 towns and villages in Hampshire we cover for external mastic. We also work in Southampton, about 14 miles from Itchen Abbas.
Jobs for external mastic in SO21 works the same way as everywhere else we cover. We cover properties on Little Hayes Lane, Northington Road and Station Hill and the roads around them. If you’re just outside Itchen Abbas, we cover Martyr Worthy (1 mile west), Itchen Stoke (1 mile east), Ovington (2 miles south-east), Easton (2 miles west) and Temple Valley (2 miles south). Within a short drive, we also cover Basingstoke (13 miles north-east), Winchester (4 miles south-west), Eastleigh (10 miles south-west), Andover (13 miles north-west), Chandler's Ford (10 miles south-west) and Alton (12 miles east).
Local landmarks in Itchen Abbas
Typical jobs here are in homes near The Plough pub and the streets around them. Itchen Abbas’s nearest station is Winchester station, roughly 4.2 miles south-west of the centre. Nearby you will also find St John's Rooms And Chapel (3.9 miles south-west) and Wolvesey Castle (4.1 miles south-west). Not far away are Winnall Moors and Twyford Down.
Why act early in Itchen Abbas
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. A stiffer product can damage the joint edge as it fails. Where a wall is exposed, as many are in small places like Itchen Abbas, wind-driven rain gets into any failed joint, and damp in older walls is slow to dry out.
Combining jobs into one visit normally makes better use of the time than several visits. We will give you a clear price for the lot.
Why book with us
- Tidy, careful work
- Quality sealants from Arbo and Everbuild
- Sanitary silicone with an anti-fungal additive in wet areas
- 180+ five-star Google reviews
Read what affects the cost or customer reviews.