Hertfordshire · England
External & façade joints in Gravesend, Hertfordshire
Problem with your movement joints in Gravesend? We remove the old material, prepare the joints and seal them properly.
- Cracked joints where brick meets render or frames
- Moss and dirt in joints with no sealant left
- Joints pointed up with cement by mistake
Signs you need external mastic in Gravesend
Joints sealed without backing rod, or far too deep, rarely last. Sealant bonded to three sides has nowhere to go and rips as the joint opens.
It’s worth asking for a quote if you see:
- Joints where the bead has come unstuck
- Brick movement joints where the sealant has split
- Hard, crazed mastic that has stopped moving
- Leaking joints around cladding and façade panels
Homes close to Church of St Mary include some older properties, and an extension built onto an older house moves differently, and the joint between them takes the strain.
Comparing quotes
- Whether the sealant suits the joint
- What happens if they find a problem under the old sealant
- Whether they seal over old material or remove it
- How much experience the applicator has
External mastic in Gravesend, done properly
Movement joints let brickwork, render and cladding expand and shrink without cracking. Its sealant has to flex with the building, season after season, so once it splits or hardens, the joint stops working and water gets in. If you’re dealing with movement joints filled with mortar instead of sealant and water getting into walls through failed joints, we can put it right, whatever the surface.
Older homes in small places like Gravesend may be stone, brick or timber-framed, often with later extensions. Where one material meets another is where water usually gets in.
You’re covered for a year from the day we finish. If there’s a problem with it, please phone 0345 464 0079 or email us.
- Place
- Gravesend (SG11)
- Wider area
- Hertfordshire
- Cover
- A year, on every job
- Price
- A clear quote up front
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
Landlord and commercial work in Gravesend
Hotels need rooms back in use, so we plan the work room by room around your bookings where we can. Hotel work is part of what we do, alongside homes and businesses.
We also work for property managers and facilities teams. Several sites can go on one quote, and we are fully insured for the work.
Different surfaces, different methods
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 coloured to suit the wall.
Cladding and façade panels
Panel systems often rely on sealant between and around the panels. We reseal them with a sealant suited to the panel material.
Aftercare tips
Joint life depends on how it’s used and looked after. We suggest:
- Clear growth from the base of walls and joints
- Act on the first splits you see
- Never let anyone fill a movement joint with mortar
- Check external joints each spring
Don’t let soil, plants or ivy build up against the new joints. Damp material against the sealant shortens its life.
Gaps, plants or missing sealant in a joint are worth getting looked at. Earlier resealing means a smaller job and a better result.
What we do, step by step
Once we’re on site, we compare the joints with what we discussed. If anything is different, we explain it before carrying on. Most jobs then take a few hours to a few days, depending on the length of joint and the access. In a small place like Gravesend, access is generally the main thing to plan. For outside work, also let us know about exposed walls and any outbuildings involved.
- We look at every joint and agree a colour to suit the wall.
- Failed sealant is removed back to clean, sound faces.
- Closed-cell backing rod is pushed in so the sealant bonds to two sides only.
- Primer is applied wherever the sealant needs it.
- We gun in low-modulus sealant and tool it neatly.
How to prepare
- Tell us about any water getting in
- Clear the area around the work
- Keep children and pets away from the work area
How to get a quote
If you are in Gravesend and need external mastic, ring 0345 464 0079 or email us. Tell us what the problem is and where, and you’ll get a clear quote before work begins.
Advice
Places near Gravesend
What else we do in Gravesend
Should I try it myself first?
If you do try it yourself, take your time over the preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it fails, we can still redo it.
What a professional job adds is preparation and the right product. We take joints back to clean, dry surfaces, and the sealant is chosen for how the joint moves and where it is, and the work is guaranteed for a year.
Why act early in Gravesend
It often makes sense to reseal all the failing joints on an elevation together. They’ve weathered the same way, and access only has to be arranged once. Where a wall is exposed, as many are in small places like Gravesend, wind-driven rain gets into any failed joint, and damp in older walls is slow to dry out.
Homes and businesses are quoted the same way: the amount of work, the access and the products needed, along with when we can work on site. Ask us for a quote and we’ll explain what it covers.
Why us?
- Fully insured
- We never seal over old sealant
- 20+ years of sealant experience
- Sanitary silicone with an anti-fungal additive in wet areas
Read how sealant jobs are priced and our reviews.
Common questions in Gravesend
Is Gravesend within the area you cover?
Yes. Gravesend is within the area we cover, which takes in towns, villages and rural addresses. We work across London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
Do you work for landlords with property near Bishops Stortford station?
Yes, rental work is part of what we do. Just ring 0345 464 0079 or send us an email and tell us about the property, and we’ll give you a clear price.
Where are you based?
Mr Mastic is based in Crawley. Our applicators cover Gravesend.
Are you ARBOMaster approved?
Yes. Mr Mastic is an ARBOMaster approved applicator, and we are fully insured.
Can you seal over the old sealant?
No. The old sealant always comes out first, so the new joint bonds to clean surfaces.
Is there any odour?
Possibly a little. It fades as the sealant cures.
Why do you put foam in the joint first?
We fit closed-cell backing rod wherever the joint depth needs controlling. It sets the sealant depth and prevents three-sided bonding, so the joint can move.
Can you seal joints between render and window frames?
Yes. We cut out the old sealant, prepare both faces and reseal with a flexible exterior product. We pick a colour that works with both materials.
External mastic in Gravesend: local notes
With historic houses such as Much Hadham Palace (about 3.6 miles south) nearby, there’s older building stock in the area around Gravesend 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. London and the South East are among the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
If you let a flat or house near Bishops Stortford station, outside joints that have cracked can let damp into a rental, so check them between lets. If you look after a building such as Albury Church of England Voluntary Aided Primary School, its movement joints, gutters and trims need looking after like any other building’s.
Gravesend is about 4 miles north-west of Bishop's Stortford, in Hertfordshire. Homes, rented property, offices and hotels in Gravesend can book us for external mastic. The work is guaranteed for a year. Gravesend is one of 381 places in Hertfordshire we cover for external mastic. Our Chelmsford page covers work nearby.
Every address in SG11 is covered for external mastic. Close by, we work in Albury (1 mile west), Clapgate (1 mile south-east), Furneux Pelham (2 miles north), Braughing (3 miles west) and Hay Street (3 miles west). Within a short drive, we also cover Stevenage (12 miles west), Bishop's Stortford (4 miles south-east), Welwyn Garden City (14 miles south-west), Hoddesdon (12 miles south-west), Cheshunt (15 miles south-west) and Hertford (11 miles south-west).
Local landmarks in Gravesend
In Gravesend, that means homes and buildings near The Catherine Wheel pub and the streets around them. Gravesend’s nearest station is Bishops Stortford station, about 4.2 miles south-east of the centre. A little further out are Herts and Essex Hospital (4.6 miles south-east) and Bishops Stortford Local History Museum (3.1 miles south-east).