Mastic sealing for building owners and managing agents in Crabtree, West Sussex
Looking for mastic sealing in Crabtree? It’s simple: send details, get a quote, we seal, guaranteed.
- Water getting in round frames after rain
- Complaints coming in block by block
- Movement joints with sealant missing
Need mastic sealing in Crabtree?
Tell us what needs sealing and where, with photos or drawings if you have them, and we’ll price it.
Mastic sealing for commercial buildings in Crabtree
Most buildings come with mastic joints nobody has looked at since handover, and it ages quietly: it sits round windows and doors, along external joints and through communal areas. When it hardens, splits or pulls away, water and draughts follow along with complaints. We work on communal kitchens and washrooms, shopfronts below residential blocks and window and door perimeters on blocks, and the failures we are asked to look at most are damaged joints in communal entrances and corridors and movement joints with sealant missing. Whether you call it commercial sealant work, mastic application or joint sealing, in Crabtree it comes down to the same thing: failed joints cut out, faces prepared and the right sealant laid to the right depth.
For buildings around smaller places like Crabtree, we group work so one trip covers it. Send photographs of the frames and joints and we’ll give a fixed quote.
The 12-month guarantee covers our workmanship: preparation, application and finish. It doesn’t extend to damage, other trades’ later work or movement the joint was never designed to take.
- Place
- Crabtree (RH13)
- Region
- West Sussex
- Cover
- 12 months on every job
- Quote
- Quoted before any work starts
- Telephone
- 01277 525 020
- Page updated
- 3 November 2026
Diagnose, treat, sign off
In a busy building, we agree a sequence with your contact so the disruption stays in one area at once. Each area is protected, prepared and sealed, then reopened once the sealant allows before we move to the next. For a building around Crabtree, tell us how to find it and who will meet us. Send that with the details and we will confirm the plan with the quote.
- We inspect the joints, building by building, and record what has failed and why.
- A fixed quote follows, split by block or building if that suits you.
- The sequence and the dates are fixed with you, giving you what you need to notify occupiers.
- We remove the old mastic completely and clean the joint faces back.
- 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
- Flag any permit to work we’ll need
- Send your site hours and access windows
- Agree which areas must stay open
Quotes
If there’s a specification, drawings or a tender package, send it with your enquiry, and we’ll price the work to it. For smaller jobs, photos and a description will do.
Read more
Cost factors for mastic joints
To price the job, we consider:
- Backing rod, priming and other preparation
- How much existing material needs removing
- Site requirements such as inductions and permits
- Any access equipment needed
Every site prices differently: joint size, product, access and site hours all play a part. Send the details and a fixed figure follows.
Details that help us quote
It doesn’t need to be a full survey. These details are enough to start:
- Drawings or a marked-up plan, if available
- The site address and postcode
- Any dates the work must fit around
- Clear photos of the problem areas
A handful of photographs and a postcode is the fastest way to a quote. Upload them with the quote form, or give us a call on 01277 525 020 or email a schedule or drawings if you’d rather talk the job through.
What else we do in Crabtree
Mastic sealing around Crabtree: points for this area
Central London is about 34 miles from Crabtree. Managed blocks of flats are a big part of commuter-belt property. Crabtree sits in one of the drier corners of the country, the South East. Outside mastic still needs a dry joint and the right temperature, while the elevations that take the most sun tend to show hardened mastic first.
Property owners at sites such as Brook Farm Business Park, 1.4 miles to the south-west of Crabtree, can have mastic renewed between lettings. If you are responsible for a building such as Old Church House the Glebe, frame and door mastic needs the same attention as any other property.
Crabtree is about 5 miles south-east of Horsham, in West Sussex. Commercial clients in Crabtree use us for work on mastic joints. Our West Sussex coverage takes in 373 places, from busy centres to rural villages. Sites around Brighton have their own page, about 14 miles away.
Commercial sites across RH13 are covered. Among the streets we cover are Mill Lane, Peppersgate and Long Hill, and sites on any of them can send details for a fixed quote. Close to Crabtree, our area also takes in Lower Beeding (1 mile north), Colwood (1 mile south-east), Monk's Gate (2 miles north-west), Plummers Plain (2 miles north-east) and Mannings Heath (2 miles north-west). Bigger towns within reach include Crawley (7 miles north-east), Horsham (5 miles north-west), Worthing (14 miles south-west), Haywards Heath (7 miles east), Burgess Hill (7 miles south-east) and East Grinstead (13 miles north-east).
Landmarks near Crabtree
In Crabtree, that means premises near Leonardslee. For rail, the closest station is Horsham station, about 4.6 miles north-west. A little further out are Horsham Hospital (4.9 miles north-west). Not far away are Knepp Wildland.
Why it’s worth doing now in Crabtree
A bead run over old mastic can look like a repair. It doesn’t bond and typically fails within a short time. Full removal and proper preparation is what lasts. For buildings around smaller places like Crabtree, water damage can go unnoticed for longer, especially where a building isn’t used daily, which gives a failed joint time to do damage. Renewing joints in good time avoids the problem.
Quantities, awkward access and phased working all shape the price. So do site requirements such as inductions and permits, along with the time of year for external work.
Why choose Mastic Doctor in Crabtree
- 12 months’ guarantee on every job
- Old sealant cut out, never sealed over
- One number for every site we cover
- Public liability insurance in place
Take a look at how commercial sealant jobs are priced or how we’re accredited.
What we are called out for in Crabtree
Sunlight and weather break mastic down over time. It stiffens, stops stretching and cracks most of all on the sunniest and most exposed elevations.
If one of these sounds familiar, it’s time for a closer look:
- No planned programme for sealant
- Estate-wide sealant that is simply worn out
- Leaks at window and door perimeters
- A mix of products and colours from past repairs
For a school such as Newells Preparatory School, perimeter mastic on windows and doors is a holiday job.
Comparing quotes
- What site paperwork they can supply
- Do they follow the manufacturer’s priming guidance?
- Whether their applicators hold CSCS cards
- Their approach to joint depth and backing
When it isn’t the sealant
We seal joints; we don’t mend everything behind them. On its own, sealant can’t deal with:
- Materials that need asbestos testing before work
- Leaks through the frame itself rather than the perimeter
- Misted or failed double-glazed units
If in doubt, phone 01277 525 020 or send photos by email and we’ll say what we think.
Where we work in Crabtree
- Shopfronts below residential blocks
- Communal entrances and stairwells
- Window and door perimeters on blocks
- Balcony and threshold joints
- Communal kitchens and washrooms
- External wall and movement joints
When to bring in a specialist
Paperwork matters too. Many sites expect CSCS cards, RAMS and proof of insurance, and our CSCS-carded applicators are used to working under those rules.
For most general trades, sealant is a sideline. A specialist brings correct preparation, depth control with backing rod and a product suited to that particular joint.
FAQs: Crabtree
Can you work at a site such as Brook Farm Business Park, by Crabtree?
Yes. Estates, retail parks and business parks around Crabtree, Brook Farm Business Park among them, are all within reach. Photos and a short description are enough for a first look.
Can you quote for a block close to Horsham station?
Yes. Blocks of any size are within what we do. We work to your notice and access arrangements.
Do you cover Crabtree?
Yes. We cover Crabtree, and the simplest way to start is to phone 01277 525 020 or email us.
How do you reach windows on upper floors?
We talk through access for each building when we quote. Tell us the number of storeys and whether scaffold or other access is planned and we will confirm the approach in the quote.
Do you seal on top of existing sealant?
No. Failed sealant is removed and the faces cleaned back to sound, dry material first, because fresh silicone will not bond with aged silicone.
Can weather delay the job?
It can, for external work. Wet joints and cold, damp or frosty conditions stop the sealant bonding properly, so external work may be moved if conditions aren’t right. Indoors, the weather is rarely a problem.
What paperwork can you provide?
Let us know your requirements: tell us what site paperwork you need (RAMS, insurance certificate, CSCS details) and we will confirm with the quote. We hold CHAS accreditation and Constructionline membership.