Construction and new-build mastic in Crawley, Hampshire
We carry out mastic packages for new-build and refurbishment projects in Crawley. Send photographs or drawings for a fixed quote.
- Frame perimeters left unsealed or poorly sealed
- Cracks opening in caulked internal joints
- Inconsistent sealant finishes from plot to plot
Need construction mastic in Crawley?
Photos, a specification or a quick description of the joints is enough to start a fixed quote.
Construction mastic for commercial buildings in Crawley
Buyers, tenants and clients notice sealant lines long before they notice the structure. A smeared bead round a window or a gap behind a worktop ends up on the snag list. We seal so the snag list stays short, area by area through the programme. Most enquiries involve mastic snags holding up handover and bath and shower joints scraped during the final clean, on sanitary and kitchen joints, window and door perimeters and cladding and panel joints. Facilities teams, main contractors and managing agents in Crawley tend to want the same three things: a clear scope, tidy work and joints that don’t fail again.
Around smaller places like Crawley, building work typically means conversions of farm buildings, a few new houses or an extension to a hall or school. Perimeters, facade joints and internal sealant all need doing properly, however small the scheme.
We stand behind the joints we seal: 12 months, guaranteed. That covers our preparation and application, and we come back if anything isn’t right.
- Where
- Crawley (SO21)
- Wider area
- Hampshire
- Guarantee
- 12 months on our workmanship
- Price
- A fixed quote before we start
- Call
- 01277 525 020
- Last updated
- 3 November 2026
New build and refits around Crawley
Central London is about 62 miles from Crawley. Commuter-belt towns tend to see a steady flow of new flats, offices and commercial schemes, which keeps mastic packages in demand. Rainfall across the South East, Crawley included, is lower than in many parts of the UK. That doesn’t stop wet spells, or frosty starts that leave panels too damp to seal, so external mastic is timed for workable conditions and agreed with the site manager.
New units and refits on sites such as Beeches Industrial Park (to the south-east of Crawley) need their panel and perimeter joints sealed to the specification. Projects at colleges like Sparsholt College Hampshire (1.6 miles south of Crawley) tend to run to term dates, so the mastic is planned tightly.
Crawley is about 5 miles north-west of Winchester, in Hampshire. Crawley sits inside our coverage, and jobs here get the same fixed quote and 12-month guarantee as anywhere else. 723 places across Hampshire fall within our area, Crawley among them. We also cover Southampton, around 13 miles from Crawley.
We cover the SO21 postcode districts. Nearby places we also cover include Worthy Down (3 miles east), South Wonston (3 miles east), Sutton Scotney (4 miles north-east), Barton Stacey (4 miles north) and Springvale (4 miles east) for mastic packages. Nearby towns on our patch include Winchester (5 miles south-east), Eastleigh (10 miles south), Andover (8 miles north-west), Totton (14 miles south), Chandler's Ford (9 miles south) and Hedge End (14 miles south).
Near you in Crawley
In Crawley, that means premises near Fox And Hounds Public House, among other places. Crawley’s nearest station is Winchester station, roughly 4.5 miles south-east of the centre. Well-known places in the area include Winchester Castle (4.8 miles south-east) and Royal Hampshire County Hospital (4.5 miles south-east). Open spaces near Crawley include Winnall Moors.
Signs you need construction mastic in Crawley
Swapping the specified sealant for a cheaper general-purpose product is a common cause of failure. A general-purpose silicone on a facade or a caulk in a wet area won’t perform like the specified product. We use what’s specified, and any substitute goes to you for acceptance.
Typical triggers for a call:
- Different trades sealing to different standards
- Window and door perimeters that won’t pass inspection
- Internal caulk splitting as the building dries out
- Mastic snags holding up handover
On a healthcare site such as Royal Hampshire County Hospital (4.5 miles south-east of Crawley), new blocks and refurbishments go on while the hospital keeps running, so mastic work is sequenced carefully.
Comparing quotes
- Will failed sealant be removed rather than covered?
- Whether their applicators hold CSCS cards
- The named product and why it was chosen
- Do they follow the manufacturer’s priming guidance?
Towns and villages near Crawley
More services for Crawley
What the job involves on each surface
Window and door perimeters
Inside, a paintable sealant or decorators’ caulk is used where the joint doesn’t move much. We follow what’s specified with colours matched to the frame where needed.
Bathrooms, en suites and washrooms
In bathrooms and washrooms, an anti-mould sanitary silicone goes around every fitting. Joints are cleaned, sealed and tooled neatly.
Crawley: questions and answers
Will you plan work around the academic year at somewhere like University of Winchester?
Yes. We plan campus work around teaching, exams and residence turnarounds. Tell us which site documents you need, such as RAMS, our insurance certificate or CSCS details, and they’re confirmed with the quote.
Can you work on a hospital site such as Royal Hampshire County Hospital?
Yes, provided the work is planned with the site’s estates team. The estates team’s permit system and infection-control rules come first, and the work is planned around them.
What accreditations do you hold?
We’re CHAS accredited and a Constructionline member, and each applicator is CSCS-carded. We’re fully insured for public liability.
Who decides which product is used?
If the job is specified, we follow the specification. If not, we choose for the movement, the surfaces and the conditions, in line with the manufacturer’s guidance.
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 hours do you work?
Give us your site hours and any access windows in your enquiry, and we’ll plan around them. You can reach the office between 8am and 5pm, Monday to Friday.
What about RAMS and site documents?
Each site asks for different documents, so list what you need, whether RAMS, insurance or CSCS details, and we’ll confirm with the quote.
Diagnose, treat, sign off
We bring the products specified for the job, along with primers and backing rod. Joint faces are cleaned back to sound, dry surfaces, primer goes on where the manufacturer specifies it, and the sealant is tooled off neatly. Rural sites near Crawley may need directions, gate codes or a contact on site. Add it to your enquiry and we will build it into the plan.
- Drawings, specification and programme come to us.
- We take off quantities and return a fixed quote.
- The sequence is agreed with the site manager.
- Plots or floors are sealed as they’re handed over.
- Joints are prepared, backed and sealed to the specification.
- Snags are cleared and the package signed off with our 12-month guarantee.
Getting the site ready
- Tell us what induction or permit system the site runs
- Send any specification or drawings in advance
- Clear stock, furniture or equipment away from the joints
Ask for a quote
We quote a fixed sum against the scope you give us, so the cost is agreed before work starts. To ask for one, give us a call on 01277 525 020 or use the quote form.
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When something else is needed
Our job is the joint, not everything around it. On its own, sealant can’t deal with:
- Deciding which fire-stopping product a penetration needs
- Joint design decisions that belong to the architect or engineer
- Faulty frames rather than failed sealant
If you are not sure, just speak to us on 01277 525 020 or email a schedule or drawings and we’ll give you a straight answer.
Surfaces we seal
- Floor and skirting junctions
- Brick and block movement joints
- Window and door perimeters
- Cladding and panel joints
- Sanitary and kitchen joints
- Internal decorators’ caulk
Work for main contractors and building owners
When you manage a building on behalf of an owner, clear figures and clear communication matter. We quote a fixed sum, confirm the scope and walk the finished work with you or your representative.
We work for building owners and managing agents on everything from one building to a spread of sites. Several sites can go on one quote, which keeps the paperwork simple.
When to bring in a specialist
There’s also the paperwork. Many sites expect CSCS cards, RAMS and proof of insurance, and our CSCS-carded applicators are used to working under those rules.
For a quick touch-up, site staff may be fine, but anything bigger is another matter: a specialist brings efficiency, a consistent finish and a 12-month guarantee.