Construction and new-build mastic in Crowthorne, Wokingham
Mastic packages for new-build and refurbishment projects in Crowthorne and across Wokingham. CHAS accredited and fully insured, with a 12-month guarantee.
- Bath and shower joints scraped during the final clean
- Snag items on joints that need redoing before handover
- Oversized or tapered gaps around new frames
Construction mastic across Crowthorne
Send drawings, photos or a joint schedule, or tell us about the site, and we’ll come back with a fixed quote.
After the work
Your facilities or cleaning team can help the joints last. Share these points with them:
- Flag uneven or tapered frame gaps early
- Brief following trades on areas that have been sealed
- Allow flexibility for external sealing in damp or cold weather
- Record the products used in the O&M file
The package carries our 12-month guarantee for workmanship. The guarantee covers how we sealed, not later damage by other trades.
Frames with gaps too wide for sealant need sorting before the mastic goes on. Filling a wide gap with sealant alone sets up a failure. We raise them during our first walk of the area.
How we handle construction mastic in Crowthorne
On a new build, the mastic package is one of the last trades through each area, which puts it right on the critical path. Mastic Doctor takes on mastic packages for main contractors and developers on schemes in Crowthorne. We work on brick and block movement joints, sanitary and kitchen joints and floor and skirting junctions, and what we’re called in for most is cracks opening in caulked internal joints and oversized or tapered gaps around new frames. Whether you call it commercial sealant work, mastic application or joint sealing, the work in Crowthorne is the same: the right product in a properly prepared joint.
For contractors on site in a town like Crowthorne, the mastic has to fit the programme: sealing as scaffold comes down or as each floor is decorated, and snagging before handover. Tell us the programme and we’ll quote to it.
Every job is signed off with a 12-month guarantee. It’s a plain promise: if our work fails within that year, we put it right.
- Location
- Crowthorne (RG45, RG40)
- Region
- Wokingham
- Guarantee
- A 12-month guarantee
- Price
- Fixed quote, scope in writing
- Telephone
- 01277 525 020
- Page updated
- 3 November 2026
Should maintenance staff do it?
A short, simple internal joint is often within reach of a maintenance team. Where it goes wrong is preparation: sealing over old material, sealing onto damp or dusty surfaces, or a product that can’t take the movement.
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.
Honest limits
A proper diagnosis includes knowing what sealant can’t do. You will hear from us if the cause turns out to be one of these:
- Defective windows, doors or glazing units (the supplier or installer’s job)
- Joints damaged after sign-off by following trades
- Fire-stopping design or sign-off (that’s for the designer, fire engineer and building control)
If you are not sure, just ring 01277 525 020 or email a schedule or drawings and we’ll give you a straight answer.
Where we work in Crowthorne
- Window and door perimeters
- Sanitary and kitchen joints
- Cladding and panel joints
- Internal decorators’ caulk
- Floor and skirting junctions
- Brick and block movement joints
On site: what to expect
When we get to site, we report to your site contact and complete whatever induction the building runs. Everything around the joints gets protected before any cutting starts, with the work itself typically taking a few days on a modest refurbishment and longer on multi-plot or multi-storey schemes. Town-centre premises in Crowthorne may have limited parking, so tell us what’s nearby. On estates and business parks it’s normally simpler.
- Drawings, the sealant specification and your programme come to us for pricing.
- You receive a fixed quote listing scope, products and phasing.
- You tell us what site paperwork you need, such as RAMS, an insurance certificate or CSCS details, and we confirm it with the quote.
- Areas are sealed plot by plot or floor by floor as the trades hand them over.
- Each joint is prepared, backed to depth and sealed in the product the specification names.
- We close out snagging and hand over with a 12-month guarantee.
What we need from you
- Clear stock, furniture or equipment away from the joints
- Tell staff and tenants when we’ll be in
- Share the asbestos register for older buildings
Get a fixed quote
Pricing a project or setting a maintenance budget? Send the scope and any drawings, and we will return a fixed quote that you can work with. If you have questions first, call 01277 525 020 or send details through our quote form.
Related advice
Also near Crowthorne
Also in Crowthorne
Building and refurbishing in Crowthorne
The South East is one of the drier parts of the UK. Winter mornings still bring frost and condensation on frames and panels, so the external programme keeps a little slack. At about 32 miles from central London, Crowthorne is within reach of the capital. Construction around the commuter belt mixes station-side flats with refurbished offices and units, and main contractors there need mastic that keeps to the programme.
School extensions, at buildings such as Crowthorne Church of England Primary School, usually run to the summer holidays, mastic included. Work at a hotel such as Dial House Hotel (to the south-west of Crowthorne) tends to be programmed around bookings, mastic included. Hospital estates such as Broadmoor Hospital (0.9 miles east of Crowthorne) tend to grow and change in phases, often next to occupied wards, so facade and perimeter sealing has to fit the estates team’s plan.
Crowthorne is about 3 miles south-west of Bracknell, in Wokingham. Crowthorne sits inside our coverage and the rest of Wokingham, with the same fixed quotes and 12-month guarantee as everywhere else. Crowthorne is one of 42 places in Wokingham on our list. We also cover Reading, some 9 miles away.
Business premises anywhere in RG45 and RG40 are within our area. Among the streets we cover are Church Road East, Church Road West and High Street. You will find Crowthorne on or near the A321 and B3348, so getting applicators and materials to site is simple. Sites close to Crowthorne are covered too, including Owlsmoor (1 mile south-east), Home Farm (1 mile north-east), Wooden Hill (2 miles north-east), Sandhurst (2 miles south) and Hanworth (2 miles north-east). A short drive away, we cover Wokingham (3 miles north-west), Woodley (7 miles north-west), Earley (7 miles north-west), Lower Earley (6 miles north-west), Winnersh (5 miles north-west) and Shinfield (7 miles west). Crowthorne is one of the busier places in Wokingham, and its commercial and public buildings are all within our area.
Landmarks near Crowthorne
Locally, jobs take us to sites close to King Edward VI Aston School, The Prince pub and Edgbarrow Woods and the streets around them. The nearest railway station is Crowthorne station, about 1 mile south-west. Nearby you’ll also find The Lexicon (3.7 miles north-east) and Pinewood Hospital (0.9 miles north). Green spaces nearby include Wildmoor Heath and Heath Lake.
What the job involves on each surface
Bathrooms, en suites and washrooms
In bathrooms and washrooms, an anti-mould sanitary silicone goes around every fitting. Each joint is prepared, sealed and finished with a neat tooled line, and any bath is loaded with water first where that’s the agreed method.
Window and door perimeters
A frame gap that’s too wide can’t just be filled with sealant. We check them during the first walk-round and flag any that need packing or adjusting before sealing starts.
Your questions answered
Will you fit the mastic around our build programme in Crowthorne?
Yes, we work to the programme and the sequence the site sets. Any paperwork you need, from RAMS to our insurance certificate and CSCS details, is confirmed with the quote.
Do you cover business parks and estates near Crowthorne, such as Wellington Business Park?
Yes. We cover Crowthorne and the area around it, including industrial estates, business parks and retail parks such as Wellington Business Park. To start, just speak to us on 01277 525 020 or email us with the unit, the joints involved and your access times.
Can you work to our specification?
We use the product the specification names. Any suggested alternative is put to you before anything changes.
Does weather matter for sealant work?
Outside, yes. Sealant needs a dry joint and a temperature within the product’s range, so frost, rain or cold mornings can delay outside work. Internal work is rarely affected.
How soon can the area be used again?
The product and site conditions decide that. Some take light use quickly, others need longer to cure, and we confirm it before leaving site.
Do you need to see the site first?
Photos, drawings or a schedule are often enough to quote. Where they aren’t, we arrange a site visit.
Can you clear a mastic snag list before handover?
Yes. Share the list and photos, and a fixed quote follows, with the work timed to your handover date.
Why act early in Crowthorne
A cheaper sealant can look like an easy saving on a large package. A failed joint in the defects period costs far more than the product difference and external joints are where it shows first. Where an alternative is genuinely suitable, we’ll say so. In Crowthorne, as anywhere, the simplest time to fix a failed joint is before it leaks. Once water gets in, there’s drying out and making good as well.
Every site prices differently: the joint sizes, the specified product, access and working hours each have a bearing. A fixed quote follows once we understand the job.
Why us?
- One number for every site we cover
- Colours confirmed for the specified product
- Over 20 years of commercial sealing
- Colours chosen to suit frames, cladding or finishes where possible
Read our cost guide or our accreditations.