Essex · England
External & façade joints in Theydon Garnon, Essex
Specialist external mastic for Theydon Garnon: the right sealant, proper preparation and a neat finish. Ask us for a quick quote.
- Joints with sealant missing in places
- Cracked joints where brick meets render or frames
- Failed sealant between panels on a façade
How we handle external mastic in Theydon Garnon
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. Common call-outs are for plants rooting in failed movement joints and old sealant gone brittle and cracked, on render & cladding joints, copings & trims and concrete & block.
External sealant needs dry, clean surfaces, so work around Theydon Garnon is planned for dry weather. Tell us about access to all sides of the building, including outbuildings and garages.
Your job is guaranteed for a year, as with all our work.
- Place
- Theydon Garnon (CM16)
- Region
- Essex
- Guarantee
- A year, on every job
- Price
- A clear quote up front
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
What affects the quote in Theydon Garnon
Every job gets its own quote. This is what makes a difference:
- The number of rooms or windows
- The old material and how stubborn it is
- The amount of work
- How easy the joints are to reach
Doing several joints on one visit normally makes better use of the time than several visits. You’ll get one clear quote for the whole job.
What to tell us for a quote
The more you tell us, the more accurate the quote. When you ask for a quote, tell us:
- Any previous sealing or DIY work
- What the problem is, such as mould, gaps, leaks or cracking
- Access, such as stairs, a lift or height
- If it’s domestic, commercial or a hotel
We do not publish a price list. Instead, your job gets its own clear quote. To arrange one, ring 0345 464 0079 or send us an email.
Honest limits
In fairness, there are a few things sealant will not fix:
- Cracking across the wall rather than at a joint
- Adding movement joints to masonry that has none
- Damp from another source, such as a leaking gutter or a bridged damp-proof course
Not sure which it is? You can phone 0345 464 0079 or send us an email and we’ll tell you honestly.
What we seal
- Concrete & block
- Façade panels
- Brickwork movement joints
- Render & cladding joints
- Copings & trims
- Joints between brick and frames
How the job changes by surface
Joints between dissimilar materials
Each side of the joint may need its own preparation. We prepare both faces so the sealant bonds properly.
Copings and trims
Copings expand and contract through the day, so a flexible sealant suits them best in all weathers.
The process
Before we leave, we go over the finished joints with you and explain the cure time. The visit itself normally takes a few hours for a handful of joints, longer for a whole elevation, depending on the amount of work. Somewhere like Theydon Garnon needs a little journey planning: let us know about lanes, gates and parking. We bring what the job needs, so it can be finished in one trip where possible.
- 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.
- Backing rod goes in next, setting the depth and keeping the sealant off the back of the joint.
- The new sealant, chosen to suit the brick or render, is applied and tooled to a neat finish.
Preparing for the visit
- Let us know if you’ve seen damp or leaks
- Let us know about parking restrictions
- Try not to wet indoor joints just before the visit
How to get a quote
It all starts with a short chat. Tell us what’s wrong, where it is and how much there is. Whenever you’re ready, phone 0345 464 0079 or email us.
Related advice
Keeping the joints in good condition
Simple care keeps the joints in good condition. We recommend:
- Check the sealant is paintable before painting near it
- Show decorators and builders where the movement joints are
- Keep soil, plants and ivy away from the joints
- Never let anyone fill a movement joint with mortar
Only paint over the joint if we have confirmed the sealant can take paint. Many exterior sealants aren’t designed to be painted and spoil the finish.
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 so early resealing is worth it.
For landlords and businesses
Mouldy or split sealant often shows up at the end of a tenancy. We can quote for more than one property at once.
A neglected joint can let water reach the structure, which matters even more when someone else lives there. Resealing at the right time is simple maintenance that we can handle for you.
Can I do it myself?
The difference is mostly in the preparation and the product. Joints are cleaned back to sound surfaces and dried, and the sealant is matched to the joint and its conditions, then guaranteed for a year.
Some jobs are best left to a professional: high-level joints, fire-rated gaps, external movement joints and big jobs need the right product, the right access and the right method.
Theydon Garnon: your questions answered
Do you cover Theydon Garnon for external mastic?
Yes, Theydon Garnon is within the area we cover. We work across London and the South East. You can call 0345 464 0079 or send us an email and let us know what needs doing, and we will give you a clear quote.
Is there a guarantee on external mastic in Theydon Garnon?
Every job comes with our 12-month guarantee, wherever it is. We’re also fully insured and ARBOMaster approved.
When is the sealant fully cured?
Different products cure at different speeds, so follow the cure time we give you.
What is a movement joint?
A vertical gap in a long brick wall is generally a movement joint. It lets the bricks expand without cracking, and it should be sealed with a flexible sealant.
What do you need from me for a quote?
Just the basics: where it is, what you’ve noticed and how we reach it. Then call 0345 464 0079 or send us an email.
Will it make a mess?
No. We protect the surfaces around the joints, and we tidy up before we go.
Do you do commercial work?
Yes. We can plan bigger jobs in stages.
Are you an approved applicator?
Yes. We hold ARBOMaster approved applicator status.
Outside joints around Theydon Garnon
With historic houses such as Hill Hall (about 1.2 miles east) nearby, there’s older building stock in the area around Theydon Garnon as well as newer homes. In older buildings, older brick and stone need a sealant that suits them, at the right joint depth. Compared with the north and west, the South East gets less rain, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
If you look after a building such as Theydon Bois Primary School, its movement joints, gutters and trims need looking after like any other building’s. If you live in an older home near Church of All Saints, older walls, gutters and the joints where extensions meet them need a flexible sealant.
Theydon Garnon is about 3 miles north-east of Loughton, in Essex. Every kind of property in Theydon Garnon is covered for external mastic. Every job comes with our one-year guarantee. 644 places in Essex are on our list. We also work in London, about 15 miles from Theydon Garnon.
Our applicators cover all of the CM16 postcode area for external mastic and the streets around it. We also cover the places around Theydon Garnon: Hobbs Cross (1 mile east), Steward's Green (1 mile north), Fiddlers Hamlet (1 mile north), Abridge (1 mile south) and Ivy Chimneys (2 miles north-west). Larger places within reach include Harlow (7 miles north), Brentwood (8 miles east), Billericay (13 miles east), Loughton (3 miles south-west), Waltham Abbey (5 miles west) and Harold Wood (7 miles south-east).
Near you in Theydon Garnon
Typical jobs here are in homes near Davenant Foundation School and The Bull Public House, among other places. Other landmarks nearby include Epping Signalling Museum (1.6 miles north) and St. Margaret's Hospital (2.3 miles north). Open spaces near Theydon Garnon include Home Mead and Lippitts Hill.