Surrey · England
Outwood External Mastic
Movement joints in Outwood need attention? We remove the old material, prepare the joints and seal them properly, with a one-year guarantee.
- Old sealant gone brittle and cracked
- Rain getting behind render or cladding at a joint
- Failed seals between different materials
Keeping the joints in good condition
So the new joints stay in good condition:
- Walk round the building once a year and look at the joints
- Keep water from gutters off the wall
- Keep movement joints as flexible joints, not mortar
- Keep high-pressure jets off the joints
Only paint over the joint if we’ve confirmed the sealant can take paint. Paint can crack on a flexible joint.
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.
External mastic in Outwood
External mastic is a job where short cuts show quickly. New sealant over old, joints packed with mortar and beads with no backing rarely last long. We strip the joint back and start again. We work on render & cladding joints, brickwork movement joints and façade panels, and common reasons people get in touch are moss and dirt in joints with no sealant left and hard, crazed mastic that has stopped moving.
Outside joints can only be sealed when they’re dry, so work in Outwood is booked around the forecast. Let us know about access to every wall, plus any garages or outbuildings.
You get a one-year guarantee, the same in Outwood as everywhere else we work.
- Location
- Outwood (RH1)
- Wider area
- Surrey
- Cover
- 12 months on all our work
- Price
- A clear quote up front
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
Outwood: your questions answered
Can you help a landlord with a rental near Salfords station?
Yes, rental work is part of what we do. You can call 0345 464 0079 or email us with the address and a few details, and we will give you a fixed price before we start.
Is Outwood in your area for external mastic?
Yes. We work across London and the South East, and Outwood is part of that. You can ring 0345 464 0079 or email us and tell us what needs doing.
Can you do several jobs on one visit?
Of course. Doing several areas at once is normally more efficient.
Do you use backing rod?
The foam is closed-cell backing rod. It stops the sealant going in too deep and bonding to three sides so it can flex with the joint.
Where are you based?
We are based in Crawley, and we work across South East England, London and Scotland.
Do you work for hotels and businesses?
Yes, regularly. Larger jobs can be planned room by room or area by area to suit the site.
Will you leave a mess?
No. We protect the surfaces around the joints, and we tidy up before we go.
Can you seal joints between two different materials?
Yes. Where different materials meet is one of the most common joints we seal. The sealant is chosen to bond to both sides with primer where required.
What we cannot put right
We will not take on work that will not last, so these are the limits:
- Cutting new joints into brickwork, which is building work rather than sealant work
- Movement that is more than a sealant joint can take
- Damp from another source, such as a leaking gutter or a bridged damp-proof course
If in doubt, phone 0345 464 0079 or drop us an email and we’ll say what we think.
Surfaces we seal
- Concrete & block
- Brickwork movement joints
- Copings & trims
- Joints between brick and frames
- Render & cladding joints
- Façade panels
Walls and rooflines in Outwood
Compared with the north and west, the South East gets less rain, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
Letting a property close to Salfords station? Then split movement joints are easy to miss on a rental until damp shows inside. If you live in an older home near Church of St John the Baptist, older walls, gutters and the joints where extensions meet them need a flexible sealant.
Outwood is about 3 miles east of Horley, in Surrey. Homes, rented property, offices and hotels in Outwood is covered for external mastic, old or new, large or small. The work is guaranteed for a year. Outwood is one of 395 towns and villages in Surrey we cover. For nearby work, see our Crawley page (7 miles or so).
Our applicators cover all of the RH1 postcode area for external mastic and the streets around it. If you need external mastic at a property on Miller's Lane, Bellwether Lane and Scott's Hill or a nearby road, our applicators can take on the job. Neighbouring places we cover for external mastic include Smallfield (1 mile south), Horley (3 miles west), Burstow (3 miles south), Fernhill (3 miles south-west) and Keeper's Corner (3 miles south). Further out, we also cover Epsom (12 miles north-west), Redhill (4 miles north-west), Ewell (13 miles north-west), Reigate (5 miles north-west), Caterham (7 miles north) and Dorking (10 miles west).
Near you in Outwood
Typical jobs here are in homes near The Castle pub. For rail, the closest station is Salfords station, about 2.2 miles west. Nearby you’ll also find Effingham Park Motor Museum (3.7 miles south) and East Surrey Hospital (2.9 miles north-west). The countryside around Outwood includes Bay Pond and Hedgecourt Lake.
Signs you need external mastic in Outwood
Sunlight, wet weather and frost wear exterior sealant down. In time it goes hard, crazes on the surface and stops stretching, so the joint eventually tears or comes away from one side.
Keep an eye out for these signs:
- Water getting into walls through failed joints
- Weeds or debris growing in open joints
- Gaps where render, brick and frames meet
- Joints pointed up with cement by mistake
For site and facilities teams at buildings such as Oakwood School, larger buildings have long runs of movement joint that eventually need resealing.
Comparing quotes
- Are they insured?
- Whether the sealant suits the joint
- Who turns up on the day
- What the cure time is
Can I do it myself?
A DIY attempt doesn’t rule out a professional job. We remove it and do the joint properly, so just mention it when you contact us.
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.
Towns and villages near Outwood
What else we do in Outwood
The process
Good joint work is mostly preparation, so that’s where we spend the time. Joints are cleaned back and dried before anything new goes in. In total, it usually takes a few hours for a handful of joints, longer for a whole elevation. Somewhere as small as Outwood, access is often the only tricky part. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- Each joint is checked and the colour of the new sealant agreed.
- We take out the old sealant until the faces are sound.
- Backing rod goes in so the sealant can stretch between the two faces.
- We prime the faces where required.
- A low-modulus exterior sealant is gunned in and tooled to a neat finish.
How to prepare
- Clear items away from the joints we are working on
- Plan for the work area to be out of bounds to pets and children
- On commercial sites, let us know about site rules
Getting a quote
If you’re in Outwood and need external mastic, phone 0345 464 0079 or send us an email. A short description of the job and where it is helps us quote, and you’ll get a clear quote before work begins.
Related advice
Different surfaces, different methods
Copings and trims
Coping joints that leak let water straight down into the wall. Resealing them is a small job that protects a lot.
Joints between dissimilar materials
Each side of the joint may need its own preparation. Both surfaces are cleaned and primed as the product requires.
Landlords, agents and businesses in Outwood
Hotels need rooms back in use, so the work can be planned room by room around your bookings where we can. Hotel work is part of what we do, alongside homes and businesses.
If you manage several properties in or around Outwood, several properties can go on one quote. Send us the addresses and the work at each, and pictures by email help.