Essex · England
External Mastic in Boreham
Movement joints in Boreham need attention? We remove the old material, prepare the joints and seal them properly.
- Hard, crazed mastic that has stopped moving
- Weeds or debris growing in open joints
- Gaps where render, brick and frames meet
About our external mastic in Boreham
Many failed façade joints only get noticed once there’s a stain or a damp patch inside. We inspect them, agree which need doing and reseal with a weatherproof, flexible sealant in a colour to suit. If you’re dealing with failed seals between different materials and sealant that has lost its bond to the brick or render, we can put it right.
Around Boreham, garages, outbuildings and extensions all add to the joints on the outside of a home. Leaks generally start at a gutter end, a garage door frame or where an extension meets the house.
The work is guaranteed for twelve months. If there’s a problem with our work within the year, let us know and we will sort it.
- Place
- Boreham (CM3)
- Region
- Essex
- Cover
- One year on every job
- Quotes
- A clear quote up front
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
Your questions about external mastic in Boreham
Is Boreham in your area for external mastic?
Yes. We work across London and the South East, and Boreham is part of that. Just ring 0345 464 0079 or email us with a few details of the job, and we’ll give you a clear price.
Do you work for landlords with property near Beaulieu Park station?
Yes. We work for landlords and letting agents as well as homeowners. You can ring 0345 464 0079 or drop us an email with the details for a clear quote.
When is the sealant fully cured?
Many sealants skin over quickly but take longer to cure fully. We’ll give you the cure time for the product we used before we leave.
Are you an approved applicator?
Yes. Mr Mastic is an ARBOMaster approved applicator and we are fully insured too.
Do you have insurance?
Yes. We are fully insured for every job we do.
Can you match the colour of my brickwork?
The aim is a neat, even joint in a colour that suits the wall. We’ll talk through colour options before work begins, matched as closely as the range allows.
Can I do it myself?
You can, for simple jobs. Preparation is everything: all the old sealant out, and a clean, dry joint. We can always put it right if it fails.
What do you put in the joint?
Each joint gets the product that suits it. Movement, water and weather all affect the choice, and we will explain our choice.
Towns and villages near Boreham
What else we do in Boreham
Different surfaces, different methods
Cladding and façade panels
Panel systems often rely on sealant between and around the panels. Each joint gets a sealant that suits the panel and its movement.
Render joints
Render is weaker at the surface than brick, so a low-modulus sealant is kinder to the joint edges. We prime where the product needs it.
Walls and rooflines in Boreham
Compared with the north and west, the South East gets less rain, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind. Historic houses like Danbury Place (about 3.2 miles south) are a reminder that the area around Boreham has older buildings as well as new. Where a home is older, older walls and rooflines need a sealant that moves with them and suits the material.
For landlords with property near Beaulieu Park station, outside joints that have cracked can let damp into a rental, so check them between lets. If you live in an older home near Church of St Andrew, the joints between older walls, newer extensions and the roofline need a sealant that can move.
Boreham is about 3 miles north-east of Chelmsford, in Essex. Jobs in Boreham get the same care as everywhere else we work: the old material taken out, joints prepared properly and a 12-month guarantee. Boreham is one of 644 places in Essex where we work.
Jobs for external mastic in CM3 works the same way as everywhere else we cover. If you need external mastic at a property on Church Road, St Andrews Road and Seabrook Gardens or a nearby road, we can help. Boreham sits on or near the B1137, which makes travel easy. Neighbouring places we cover for external mastic include Mowden (1 mile east), Springfield (2 miles south-west), Little Baddow (2 miles south-east), Hatfield Peverel (2 miles north-east) and Sandon (3 miles south). Further out, we also cover Chelmsford (3 miles south-west), Basildon (14 miles south), Braintree (8 miles north), Brentwood (14 miles south-west), Maldon (6 miles east) and Billericay (11 miles south-west).
Around Boreham
In Boreham, that means homes and buildings near Six Bells Public House and Boswells School and the streets around them. Boreham’s nearest station is Beaulieu Park station, about 1 mile west. Other landmarks nearby include Priory Hospital (2.6 miles south-west) and Bond Street Chelmsford (3.4 miles south-west). For a walk, there’s Newland Grove.
What affects the cost of external mastic
The quote reflects the job in front of us. We take into account:
- The product the joint needs
- Any mould that needs treating
- Whether old sealant or filler has to be cut out
- Working hours on commercial sites
The cost reflects the work involved, not a rough estimate. That’s why we ask a few questions first.
What to tell us for a quote
When you contact us, these details help:
- A few photos by email, if you can
- Any previous sealing or DIY work
- Where the job is, and your postcode
- What’s wrong with the joints now
If you are in Boreham and need external mastic, ring 0345 464 0079 or drop us an email. Tell us what the problem is and where, and you’ll get a clear quote before we start.
The process
When we arrive, we look over the joints with you first, so there are no surprises. Surfaces next to the work are protected before any work begins. Most jobs take a few hours to a few days, depending on the length of joint and the access. Parking around Boreham is normally easier than in a town centre, but mention any lanes, gates or long drives. For outside work, side access and the height of the joints help us plan.
- 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.
- 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
- For indoor joints, keep the area dry beforehand if you can
- On commercial sites, let us know about site rules
- Mention any leaks or damp you’ve noticed
Ask for a quote
To get a quote, ring 0345 464 0079 or email us and tell us where the job is and what the problem looks like. We’ll give you a clear quote before any work starts.
Read more
How to look after the new joints
Once the sealant has cured, a few habits help it last:
- Walk round the building once a year and look at the joints
- Never let anyone fill a movement joint with mortar
- Deal with leaking gutters that soak the joints below
- Keep soil, plants and ivy away from the joints
Avoid pressure-washing straight into the joints. A strong jet can damage the edges of the bead and let water in behind.
Gaps, plants or missing sealant in a joint are worth getting looked at. Earlier resealing means a smaller job and a better result.
What happens if it’s left?
Done well, a resealed joint is a neat, straight line that suits the wall. A rushed bead with no backing looks untidy and doesn’t last, so it pays to do it properly once. Homes in smaller places like Boreham can face more weather, and failed outside joints let damp into walls. Indoors, a failed seal lets water into floors and panels as it would anywhere.
Combining jobs into one visit normally makes better use of the time than several visits, so tell us about everything that needs sealing. You will get one clear quote for the whole job.
What you get with us
- Sanitary silicone with an anti-fungal additive in wet areas
- Experience in homes, commercial sites and hotels
- A 12-month guarantee on all work
- Arbo and Everbuild products
Signs you need external mastic in Boreham
Poor preparation causes many early failures: dusty or wet faces, no primer where one was needed, or old sealant left in. The sealant never bonds properly.
Common reasons people contact us are:
- Movement joints filled with mortar instead of sealant
- Leaking joints around cladding and façade panels
- Plants rooting in failed movement joints
- Old sealant gone brittle and cracked
Schools such as Boreham Primary School are buildings too, and movement joints, cladding joints and gutters on larger buildings need the same care as a house’s.
What to look for in a quote
- What product goes in the joint
- What insurance they hold
- What the quote includes, VAT included or not
- How hidden problems are handled
Landlord and commercial work in Boreham
Whether it’s one flat or a portfolio, the work is the same standard: the old material taken out, careful preparation and a 12-month guarantee.
If you manage several properties in or around Boreham, jobs at different addresses can be quoted together. Just tell us the addresses and what each one needs.