The Mastic Doctor team standing beside their branded vans outside an office building
Windsor and Maidenhead · England

Expansion and movement joint sealing in Dedworth, Windsor and Maidenhead

Expansion and movement joint sealing in walls, decks and floors in Dedworth. CHAS accredited and fully insured, with a 12-month guarantee.

  • Arrises breaking up along floor joints
  • Weathered movement joint sealant that no longer flexes
  • Expansion joints filled with dirt and stones
1
Send details
Send the specification, photos or a marked-up plan.
2
Get a quote
Scope agreed and priced before anything starts.
3
We seal
The right sealant, to the right depth, neatly finished.
4
Guaranteed
Our workmanship is guaranteed for 12 months.
South East, London & Scotland
CHAS & Constructionline
£5m public liability

Need expansion joint sealing in Dedworth?

Share the site address and what’s failing, and we’ll reply with a fixed quote or arrange a visit.

How we handle expansion joint sealing in Dedworth

Brickwork and blockwork walls have vertical movement joints at intervals. Failed sealant here lets rain into the wall and can leave the joint full of debris. The old seal comes out, backing goes in and a sealant with the right movement class is applied. We work on cladding panel joints, podiums and floor movement joints and blockwork control joints, and the usual reasons a site gets in touch are spalled or broken joint edges in floors and decks and expansion joints filled with dirt and stones. Whoever orders the work in Dedworth, the brief is normally the same: a clear scope, tidy work and joints that don’t fail again.

Small units near places like Dedworth are often converted farm buildings with new concrete floors. Saw-cut and construction joints in those floors need the right filler or sealant for the forklifts and trolleys that use them.

Every job we finish is backed by a 12-month workmanship guarantee, in Dedworth as everywhere else we work. If our installation lets you down in that time, we return and fix it.

Where
Dedworth (SL4)
Region
Windsor and Maidenhead
Guarantee
A 12-month guarantee
Price
Fixed quote, scope in writing
Telephone
01277 525 020
Page updated
3 November 2026
The Mastic Doctor team beside their liveried vans in front of an office building

How a job runs

On arrival, we sign in, go through any site induction and check how permits are handled. Everything around the joints gets protected before any cutting starts, and the work normally takes a short visit for a handful of joints, or several days or more for a car park deck or long runs of facade joints. For a job in Dedworth, the main thing is a clear picture of the work, so send photographs of each area. You’ll then get a fixed price for the work.

  1. We assess the joints on site or from photographs, noting widths and how each has failed.
  2. A fixed quote names the sealant we propose and its movement class.
  3. Phasing is agreed so decks, floors or entrances can stay in use where needed.
  4. The failed seal is cut out and both joint faces cleaned back to sound material.
  5. Depth is controlled with backing, the faces are primed where the maker calls for it, then the bead is laid and tooled.
  6. We check each joint with you, confirm the cure time and sign off under our 12-month guarantee.

What we need from you

  • Agree which areas must stay open
  • Let us know about inductions and permits
  • Point out parking and an unloading spot

Get a fixed quote

Every job follows the same four steps: send details, get a quote, we seal, guaranteed. To take the first step, phone 01277 525 020 or email a schedule or drawings.

Get a price

Read more

Where floor joints take the most wear near Dedworth

The 3 miles around Dedworth take in at least three named trading estates, business parks or retail parks. That puts plenty of warehouse floors, service yards and car parks close by, all with joints under traffic. At about 24 miles from central London, Dedworth is within reach of the capital. Distribution warehouses and industrial estates are common around the motorway corridors that serve the capital.

At places like Slough Retail Park, which lies north-east of Dedworth, joints are sealed a section at a time so operations carry on. Office parks like Bray Business Centre (2.6 miles north-west of Dedworth) have decks, ramps and clad elevations whose joints take movement every day.

Dedworth is about 1 mile west of Windsor, in Windsor and Maidenhead. We send applicators to Dedworth for movement joints. We work across 60 places in Windsor and Maidenhead. There’s a separate page for Reading, roughly 14 miles from Dedworth.

Business premises anywhere in SL4 are within our area for movement joints. For a building on Ash Lane, Wolf Lane and Roses Lane or nearby, we can quote for movement joints. Nearby places we also cover include Windsor (1 mile east), Oakley Green (1 mile west), Boveney (1 mile north), Clewer (1 mile north-east) and Water Oakley (1 mile north-west) for movement joints. Further afield, our area takes in Maidenhead (5 miles north-west), Boyn Hill (5 miles north-west), Cookham (7 miles north-west), Furze Platt (6 miles north-west), Broomhall (6 miles south) and South Ascot (5 miles south). Among the larger centres in Windsor and Maidenhead is Dedworth, and we take on movement joints for its commercial and public buildings.

Near you in Dedworth

In Dedworth, that means premises near Windsor Girls' School, Windsor Girls' School and The Greene Oak pub and the streets around them. For rail, the closest station is Windsor & Eton Central station, roughly 1.7 miles east of the centre. A little further out are Windsor Castle (1.9 miles east) and King Edward VII Hospital (1.5 miles east). Not far away are Bray Pit and Taplow Lake.

Map of Dedworth © OpenStreetMap contributors

Signs you need expansion joint sealing in Dedworth

Some joints were never sealed with the right product. Products not classed for the movement fail early. BS EN ISO 11600 classifies building sealants by movement capability, and specifications often refer to it.

Things that typically lead to an enquiry:

  • Leaks through car park deck joints onto the level below
  • Layers of sealant in a movement joint
  • Arrises breaking up along floor joints
  • Expansion joints split through the centre of the bead

Campuses like Imperial College Silwood Park Campus (4.6 miles south of Dedworth) mix old and new buildings, with movement joints wherever they meet.

Questions to ask before you book

  • Are they CHAS accredited or on Constructionline?
  • Who will actually carry out the work
  • Whether primer will be used where the manufacturer specifies it
  • Is the sealant right for the movement and the substrate?

How to choose a sealant contractor

Honest limits

Sealant solves a lot, but not everything, and we’d rather tell you before you spend money. It won’t fix:

  • Broken or spalled joint edges, which need repairing before any sealant goes in
  • Changing the joint layout or spacing of a structure
  • Damaged metal nosings or cover plates over a joint

Not sure which it is? You can ring 01277 525 020 or email a schedule or drawings and we’ll tell you honestly before you book.

Surfaces we seal

  • Precast concrete panel joints
  • Brickwork movement joints
  • Podiums and floor movement joints
  • Cladding panel joints
  • Car park decks and ramps
  • Blockwork control joints

What sets the cost

Quotes vary with the job. Expect it to depend on:

  • Phasing around occupants
  • Travel to remote or island sites
  • Which sealant the job calls for
  • The site’s rules and procedures

We don’t publish prices, because the scope varies so much from one building to the next. Call for a quote and we will price your job on its own details.

What we need to price the job

A few photos plus some basic facts will normally do. Please tell us:

  • Asbestos survey details if the building is older
  • Specification clauses that apply
  • Where the site is, with the postcode
  • Your programme or deadline

If there’s a specification, drawings or a tender package, send it with your enquiry, and we’ll price the work to it. Smaller jobs need nothing more than photographs and a few notes.

Commercial clients in Dedworth

Main contractors use us as their sealant subcontractor, on new build and refurbishment alike. Programme, specification and site rules come first, and our applicators hold CSCS cards.

Agents, factors and owners’ representatives all follow the same route: send the details, accept a fixed quote, and we carry out and guarantee the work. Keys, access and contacts can be agreed in advance.

Questions we are asked in Dedworth

Will you take on work at estates like Bray Business Centre, close to Dedworth?

Yes. Our area takes in Dedworth and its surroundings, with estates and business parks such as Bray Business Centre included. A few photos and the unit address let us price the work.

Can you work on a hospital site such as King Edward VII Hospital?

Yes, hospitals are one of the sectors we cover. The estates team’s permit system and infection-control rules come first, and the work is planned around them.

Are expansion joints and movement joints the same thing?

It’s a deliberate gap that lets the structure move without cracking. Many people call it an expansion joint.

Can you work on car park ramps and decks?

Yes. These joints take wheels, salt and water, so product choice matters.

Are you fully insured?

Yes. Our insurance certificate can be sent alongside the quote.

How much does the work cost?

Every job gets its own fixed quote. For yours, call 01277 525 020 or email a schedule or drawings with a description of the work.

Do you offer coloured sealant?

Often, yes. Many products come in a range of standard colours, and matching to RAL references or surrounding finishes is often possible. We will confirm the colours available for the specified product.

After the work

After handover, these steps help:

  • Check joints after long freezing spells
  • Treat a small split as a warning, not a cosmetic issue
  • Keep stones and debris out of open joint lines
  • Brief car park operatives to protect joint lines during winter clearance

In warehouses, forklift and pallet-truck routes take the most wear. Avoid standing heavy loads or racking legs on the joints.

A failed deck joint lets water straight through to the level below. That water often carries de-icing salts with it. Sealing the joint promptly stops it at source.

Accreditations

Trusted. Accredited. Insured.