Essex · England
External Mastic in Navestock Heath
Sealing brickwork movement joints, render, cladding and façade joints for householders, landlords and businesses in Navestock Heath. ARBOMaster approved applicators, fully insured, with a 12-month guarantee.
- Failed seals between different materials
- Joints with sealant missing in places
- Panel joints letting water in
How we handle external mastic in Navestock Heath
Many failed façade joints only get noticed once there’s a stain or a damp patch inside. We look over the joints, agree the ones to renew and reseal with a flexible, weatherproof product in a matching colour. We work on concrete & block, joints between brick and frames and render & cladding joints, and people most often call us about cracked joints where brick meets render or frames and plants rooting in failed movement joints.
Older homes in small places like Navestock Heath may be stone, brick or timber-framed, often with later extensions. The joints where those materials meet are the weak points.
We stand behind the work with a one-year guarantee, so you are covered after we’ve gone.
- Location
- Navestock Heath (RM4)
- Wider area
- Essex
- Cover
- 12 months on all our work
- Price
- A clear price before we start
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
Walls and rooflines in Navestock Heath
With historic houses such as Hill Hall (about 3.2 miles north-west) nearby, there’s older building stock in the area around Navestock Heath as well as newer homes. In older buildings, 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, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
If you live in an older home near Church of St Thomas the Apostle, the joints between older walls, newer extensions and the roofline need a sealant that can move.
Navestock Heath is about 4 miles north-west of Brentwood, in Essex. Navestock Heath gets the same service as everywhere we cover: the old material taken out, joints prepared properly and a 12-month guarantee. Across Essex, we cover 644 places, and Navestock Heath is one of them. Our Chelmsford page covers work nearby.
All of RM4 is within our area for external mastic, from the main roads to the quietest streets. Neighbouring places we cover for external mastic include Horseman Side (1 mile south-east), Waterhales (1 mile south), Navestock Common (2 miles south), Navestock Side (2 miles east) and Hare Street (2 miles north). Further out, we also cover Chelmsford (13 miles north-east), Basildon (12 miles south-east), Harlow (9 miles north-west), Brentwood (4 miles south-east), Billericay (9 miles east) and Loughton (7 miles west).
What’s near Navestock Heath
We work in homes and buildings around The Alma Arms, among other places. The closest station to Navestock Heath is Harold Wood station, roughly 4.3 miles south of the centre. Well-known places in the area include Harold Wood Hospital (4.3 miles south). Green spaces nearby include Bedfords Park.
Signs you need external mastic in Navestock Heath
Poor preparation causes many early failures: joint faces that were dusty or damp, unprimed where they needed it, or still carrying old sealant. The sealant never bonds properly.
Common reasons people contact us are:
- Weathered mastic that no longer stretches
- Weeds or debris growing in open joints
- Water getting into walls through failed joints
- Brick movement joints where the sealant has split
Letting a property close to Harold Wood station? Then split movement joints are easy to miss on a rental until damp shows inside.
What to look for in a quote
- Which sealant they’ll use, and why
- Whether all the old sealant comes out first
- What the quote includes, VAT included or not
- What guarantee comes with the work
Landlord and commercial work in Navestock Heath
Mouldy or split sealant often shows up at the end of a tenancy, and it’s quick to put right between tenancies. Several properties can be quoted together.
Letting agents often deal with us directly. Tell us the address, the job and how access works.
When it is not the sealant
We’d rather tell you now than do work that will not last, so these are the limits:
- Cutting new joints into brickwork, which is building work rather than sealant work
- Render that is blown, hollow or coming away
- Subsidence or other structural problems
If you are not sure, just phone 0345 464 0079 or send us an email and we’ll give you a straight answer.
Joints and surfaces we work on
- Copings & trims
- Façade panels
- Render & cladding joints
- Concrete & block
- Brickwork movement joints
- Joints between brick and frames
Leave it or put it right?
Resealing a run of joints in one go is normally better than patching one at a time. Joints of the same age tend to fail together, and access only has to be arranged once. In a small place like Navestock Heath, homes can be exposed to wind and rain, which finds any gap, and damp in older walls is slow to dry out.
A few things move the cost up or down: how much old sealant there is and how stubborn it is, whether mould needs treating, and whether the work is at height. We take all of that into account in your quote.
Why book with us
- Anti-fungal silicone where joints get wet
- Colour picked to suit the job
- 180+ five-star Google reviews
- One-year guarantee on every job
Take a look at how sealant jobs are priced and what customers say.
The process
On the day, there’s very little for you to do. Point us to the joints and we’ll get on with it. The work itself takes a few hours for a handful of joints, longer for a whole elevation, including the tidy-up. Somewhere as small as Navestock Heath, access is often the only tricky part. For outside work, also let us know about exposed walls and any outbuildings involved.
- First we look over the joints with you, agree which to renew and talk through access.
- We cut out the failed sealant and rake out any dirt or growth.
- The joint faces are cleaned and primed where the sealant needs it.
- Closed-cell backing rod is fitted to set the depth and stop three-sided bonding.
- The new sealant, chosen to suit the brick or render, is applied and tooled to a neat finish.
Preparing for the visit
- Mention any leaks or damp you’ve noticed
- Move anything stored near the joints
- Mention any parking rules near the property
How to get a quote
Need a quote? Please call 0345 464 0079 or send us an email and tell us about the job. We’ll explain what we’d do and give you a clear quote before any work starts.
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Common questions in Navestock Heath
Is Navestock Heath in your area for external mastic?
Yes, Navestock Heath is within the area we cover. Our work covers London and the South East. Just ring 0345 464 0079 or email us with a few details of the job.
Will you come out to Navestock Heath?
Yes. Navestock Heath is within the area we cover, which takes in towns, villages and rural addresses. Our work covers London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
How often do external joints need resealing?
It varies with how exposed the wall is and how much the joint moves. Signs to watch for are cracking, hardening and gaps at the edges.
Do I need to be at home?
We need access to the joints, so we will agree that with you when we book. For inside work, that normally means someone being in.
Do you work for landlords and businesses?
Yes, regularly. We can quote for several properties at once, and between tenancies is a good time for the work.
What colours does the sealant come in?
We choose a sealant colour to suit the brick, stone or render. Exterior sealants come in a good range of colours.
Do you work for hotels and businesses?
Yes. Hotels, offices and other businesses use us and we are fully insured.
Can I add another job to the visit?
Yes. Several rooms, windows or areas can go on one quote.
Can I do it myself?
A DIY attempt does not rule out a professional job. We remove it and do the joint properly.
Overfilling a joint is a classic DIY mistake. A heavy bead looks messy and copes badly with movement, and the joint depth matters as much as the finish.
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What affects the quote in Navestock Heath
Every job gets its own quote. These are the things that affect it:
- The old material and how stubborn it is
- The product the joint needs
- Whether there’s mould to deal with
- Whether the work is at height
Combining jobs into one visit is generally more efficient than separate visits, so it’s worth mentioning everything you’d like done. You will get one clear quote for the whole job.
Asking for a quote
There’s no need for technical detail. Just tell us:
- A few pictures by email, if you can
- How many joints, rooms or windows are involved
- If it’s domestic, commercial or a hotel
- How we’d reach the joints
Every job is quoted individually, so start by telling us what you need. Simply ring 0345 464 0079 or drop us an email and describe the job.