Mastic Sealing in Crawley Down
Mastic sealing for building owners, managing agents and housing associations throughout Crawley Down and nearby, carried out by CSCS-carded applicators. Fully insured and CHAS accredited.
- Occupiers reporting cold air round windows
- Complaints coming in block by block
- Window mastic that has split and shrunk
Mastic sealing near Crawley Down
Send drawings, photos or a joint schedule, or tell us about the site, and we’ll come back with a fixed quote.
Mastic sealing for commercial buildings in Crawley Down
Different joints need different sealants. Window perimeters and external joints often take a low-modulus neutral-cure silicone, while hybrid polymer sealants grip many materials and are often paintable. We’ll confirm the colours available for the specified product. If you have cracked, hardened mastic round windows on a block and occupiers reporting cold air round windows, we can help, on communal kitchens and washrooms, external wall and movement joints and balcony and threshold joints alike. Sealant applicators who only do sealant are a different proposition from a general trade with a gun in the van: on jobs in Crawley Down, preparation and product choice get the time they need.
Places the size of Crawley Down typically have some housing association stock, small blocks and mixed-use buildings. Their window perimeters and external joints need renewing as the mastic ages.
What our 12-month guarantee covers is the way we did the job: the preparation, the sealing and the tooling. Damage, later alterations by others and movement beyond what the joint was designed for sit outside it.
- Location
- Crawley Down (RH10)
- Region
- West Sussex
- Guarantee
- 12 months on every job
- Quote
- Fixed quote, scope in writing
- Telephone
- 01277 525 020
- Page updated
- 3 November 2026
What we are called out for in Crawley Down
Poor preparation explains many failed joints. Where the faces weren’t cleaned or primed as specified, the bead peels off one side.
It’s worth sending us details if you spot any of the following:
- Communal area joints that look neglected
- Old repairs sealed over failed mastic
- Water getting in round frames after rain
- Cracked, hardened mastic round windows on a block
Historic properties like Saint Hill Manor (2.4 miles south-east of Crawley Down) show the age of some local stock, where frame mastic must suit soft brick or stone.
Questions to ask before you book
- Health and safety accreditation such as CHAS
- How joint depth will be controlled
- What level of public liability insurance do they hold?
- Is the sealant right for the movement and the substrate?
Places near Crawley Down
Also in Crawley Down
After the work
Problems stay small when the joints are checked regularly. Specifically:
- Reduce knocks to communal area joints
- Ask residents or tenants to report leaks and draughts early
- Look at the sunniest and most exposed elevations first
- Make mastic part of routine maintenance checks
If paintable sealant was used, decoration can follow once it has cured. Silicone usually can’t be painted, so keep decorators off it unless told otherwise.
The longer failed joints are left, the more likely the substrate edges break up. Then the edges may need repairing first.
How the job changes by surface
Commercial and mixed-use buildings
Landlords with commercial portfolios have shopfronts, office entrances and external joints to look after. We work across portfolios on a planned basis.
Planned maintenance
Planned resealing replaces emergency callouts and spreads the work.
Crawley Down: questions and answers
Is Crawley Down too small for you to travel to?
Not at all. Crawley Down is within our area. London and every South East county are within our area. Where we can, we group nearby jobs to make the most of each trip.
Can you work at a site such as Silverwood Industrial Estate, by Crawley Down?
Yes. Our area takes in Crawley Down and its surroundings, with estates and business parks such as Silverwood Industrial Estate included. To start, just speak to us on 01277 525 020 or email the details over with the unit, the joints involved and your access times.
Can you follow the specification on our project?
Yes. Include it with the drawings when you ask for a quote, and we’ll price the work to it, flagging anything that needs clarifying.
Can weather delay the job?
For external joints, yes. The joint has to be dry and within the product’s temperature range, so frost, rain or cold mornings can delay outside work. Inside work is seldom held up.
Is any job too small?
Whatever the size, the process is the same: details, then a fixed price, then sealing, then a 12-month guarantee.
Do you need to see the site first?
That depends on the size and complexity of the job. Simple work can often be priced from photos, while larger or less clear jobs get a site visit first.
How long do sealant joints last?
There’s no fixed lifespan: movement, exposure, cleaning, traffic and the product all play a part. Treat them as maintenance items and inspect them regularly.
Our process
Occupied buildings need a little choreography. We sign and contain the area we are in, with routes through the building left open and move on in phases so staff and visitors can carry on around us. For a site in Crawley Down, we plan so the whole job is done in one go where possible. Photos with rough sizes let us arrive with everything needed.
- Each block or building is walked and the failed joints recorded with the likely cause.
- A fixed quote follows, split by block or building if that suits you.
- The programme is fixed with you, including dates you can pass on to residents or tenants.
- Old sealant is stripped and each face prepared back to firm material.
- Deep joints get backing rod, faces are primed if the manufacturer specifies it, then the joint is sealed and tooled.
- Finished joints are looked over and the 12-month guarantee confirmed.
Getting the site ready
- Arrange parking or a loading space
- Warn occupants and staff about the work
- Flag any permit to work we’ll need
Ask for a quote
Photos, drawings or a schedule of the joints and a fixed quote comes back to you. Where a site visit makes more sense, we’ll arrange one.
Advice
Building owners, agents and FMs in Crawley Down
Main contractors use us as their sealant subcontractor, on new build and refurbishment alike. We work to your programme, your specification and your site rules, and our applicators hold CSCS cards.
We work for building owners and managing agents on sealant work across single buildings or whole portfolios. Several sites can go on one quote, which keeps the paperwork simple.
Mastic sealing around Crawley Down: points for this area
Crawley Down is about 26 miles from central London. Commuter-belt towns tend to have plenty of managed blocks near stations and town centres; their frame mastic often ages block-wide. Rainfall across the South East, Crawley Down included, is lower than in many parts of the UK. External mastic still waits for dry faces and the right temperature, and the sunniest, most exposed sides of a building normally need attention first.
Buildings close to stations like East Grinstead station (to the east of Crawley Down) are often flats over shops, with frame mastic to keep sound. If you own or manage units on a site such as Silverwood Industrial Estate, 1.2 miles to the north-west of Crawley Down, failed mastic on frames, door surrounds and external joints can be dealt with unit by unit.
Crawley Down is about 3 miles west of East Grinstead, in West Sussex. Across the RH10 postcode area, the process is the same: send details, get a fixed quote, we seal, and the work is guaranteed. Across West Sussex, 373 places are covered, Crawley Down among them. For work in that direction, see our Brighton page.
Work on mastic joints is covered throughout RH10. Streets here include Station Road, Forest Close and Burleigh Way, and sites on any of them can send details for a fixed quote. Sites close to Crawley Down are covered too, including Furnace Wood (1 mile north), Snow Hill (1 mile north), Turners Hill (1 mile south), Domewood (1 mile north) and Felbridge (2 miles north-east). Further afield, our area takes in Crawley (5 miles west), Horsham (11 miles west), Haywards Heath (9 miles south), Burgess Hill (12 miles south), East Grinstead (3 miles east) and Broadfield (6 miles west).
Local landmarks in Crawley Down
Locally, jobs take us to sites close to Imberhorne School. The closest station to Crawley Down is East Grinstead station, about 2.5 miles east of the centre. Well-known places in the area include Queen Victoria Hospital (3.5 miles east) and Effingham Park Motor Museum (1.4 miles north-west). Not far away are Hedgecourt Lake.
How the quote is worked out
The price varies from site to site. Expect it to depend on:
- Site requirements such as inductions and permits
- Working within restricted access windows
- How much existing material needs removing
- The total length or number of joints
We don’t publish prices, since every building and every scope is different. For a fixed figure, call for a quote.
What we need to price the job
A few photos plus some basic facts will normally do. Please tell us:
- Clear photographs of the problem areas
- Specification clauses that apply
- How the joints are reached, and at what height
- Whether the building will be occupied during the work
For a fixed quote, ring 01277 525 020 or email us, telling us the site location and the nature of the job. Our quote form is another easy route.