The Mastic Doctor team standing beside their branded vans outside an office building
Greater London · England

Mastic contractors in Strawberry Hill

Mastic packages for new-build and refurbishment projects across Strawberry Hill, by CSCS-carded applicators. CHAS accredited and fully insured.

  • Internal caulk splitting as the building dries out
  • A mastic package split between trades with no clear owner
  • Sealant knocked or painted over by other trades
1
Send details
Drawings, photos, a joint schedule or a site visit.
2
Get a quote
Scope agreed and priced before anything starts.
3
We seal
Failed joints cut out, faces prepared, new sealant laid.
4
Guaranteed
Our workmanship is guaranteed for 12 months.
South East, London & Scotland
CHAS accredited
£5m public liability

Construction mastic for businesses in Strawberry Hill

Photos, a specification or a quick description of the joints is enough to start a fixed quote.

How a job runs

Inspect, seal, sign off: that’s the shape of every visit. First comes an inspection and agreement on scope, then we prepare and seal each joint with the specified product, and we finish with a walk round so the work can be signed off. For a job in Strawberry Hill, access comes first. Send the building rules and access times with your enquiry.

  1. We walk the site or review drawings to understand the package.
  2. A fixed quote sets out scope, products and phasing.
  3. Paperwork is agreed and applicators are inducted on site.
  4. Sealing follows the programme as areas are released.
  5. Problems we find, such as oversized gaps, are raised straight away.
  6. Final snagging is completed and the 12-month guarantee applies.

Preparing the site

  • Confirm the product named in the specification
  • Point out any areas we must not close
  • Let us know about inductions and permits

Request a quote

For a fixed quote, phone 01277 525 020 or use the quote form with the site address and an outline of the work. Our quote form is another easy route.

Get a quick quote

Read more

Construction mastic for commercial buildings in Strawberry Hill

Since 2005 we have worked alongside main contractors, developers and fit-out firms. Quantities come off the drawings, the sequence is agreed with the site manager and the work follows the trades. To price a package in Strawberry Hill, send drawings and the specification through our quote form. Site teams most often ask us about caulk cracking where joints are moving more than expected and frame perimeters left unsealed or poorly sealed, on cladding and panel joints, brick and block movement joints and internal decorators’ caulk. One point of contact handles commercial sealant work in Strawberry Hill from the first photos to the final walk-round, for single jobs and planned programmes alike.

A great deal of London construction is refurbishment of occupied or part-occupied buildings, alongside new blocks. Replacement windows, recladding and fit-outs leave perimeter and facade joints to seal, often next to people still using the building.

What our 12-month guarantee covers is the way we did the job: preparation, application and finish. It doesn’t extend to damage, other trades’ later work or movement the joint was never designed to take.

Mastic Doctor team members lined up next to their branded vans outside an office building
Place
Strawberry Hill (TW1, TW11, TW2)
Region
Greater London
Guarantee
12 months on every job
Quotes
Quoted before any work starts
Telephone
01277 525 020
Page updated
3 November 2026

Maintenance after handover

A few simple habits keep the new joints working:

  • Ask cleaners to use soft cloths around fresh sealant
  • Note which sealant went where at handover
  • Put any product change through the designer first
  • Plan external elevations with the weather in mind

Our 12-month guarantee covers the workmanship from sign-off. Damage by others isn’t a workmanship fault, so protecting sealed areas matters.

Snag items left to the last week put handover at risk. Clearing snags area by area spreads the work out.

What we can’t put right

We seal joints; we don’t mend everything behind them. 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
  • Defective windows, doors or glazing units (the supplier or installer’s job)

Not sure which it is? You can speak to us on 01277 525 020 or send details through our quote form and we’ll tell you honestly.

Surfaces we seal

  • Window and door perimeters
  • Sanitary and kitchen joints
  • Internal decorators’ caulk
  • Floor and skirting junctions
  • Brick and block movement joints
  • Cladding and panel joints

Mastic packages on Strawberry Hill sites

There are a good number of hotels within about 2 miles of Strawberry Hill. Hotel extensions and refits typically have to fit around bookings, so mastic dates are tight. Site traffic in Strawberry Hill falls within London’s ULEZ, like everywhere else in Greater London. Add booked deliveries and tight storage, and the mastic package needs planning with the site team.

For contractors refurbishing units at places like Newmans Shipyard & Business Park (under half a mile north-east of Strawberry Hill), the mastic covers cladding panels, roller-door and window perimeters. Extensions at sites like Teddington Memorial Hospital, 0.9 miles south of Strawberry Hill, usually sit beside working departments, and the mastic follows strict access rules.

Strawberry Hill is about 1 mile south of Twickenham, in Greater London. Anywhere in TW1, the process is the same: send details, get a fixed quote, we seal, and the work is guaranteed. 764 places across Greater London fall within our area, Strawberry Hill among them. There’s a separate page for London, about 11 miles away.

We take on mastic packages across the TW1, TW11 and TW2 postcode area, whatever the building. If your site is on Tower Road, Heath Road and Clive Road or close by, we can quote for mastic packages. If your building is just outside Strawberry Hill, we cover Fulwell (1 mile south-west), Eel Pie Island (1 mile north-east), Twickenham (1 mile north), Teddington (1 mile south) and Whitton (1 mile north-west). Bigger towns within reach include London (11 miles east), City of Westminster (9 miles north-east), Marylebone (10 miles north-east), Kensington (7 miles north-east), St Pancras (11 miles north-east) and Shoreditch (13 miles north-east).

Near you in Strawberry Hill

In Strawberry Hill, that means premises near Archdeacon Cambridge's Church of England Primary School, Marble Hill Park and St Richard Reynolds Catholic High School, among other places. There’s a railway station in Strawberry Hill itself: Strawberry Hill station. A little further out are Eel Pie Island Museum (0.8 miles north-east) and Bentall Centre (2.2 miles south-east). Not far away are Kew Gardens Lake and Ham Lands.

Map of Strawberry Hill © OpenStreetMap contributors

Why it’s worth doing now in Strawberry Hill

Clearing snags piecemeal is tempting when handover is close. But one planned snagging pass through each area usually clears more for less disruption, and avoids repeated visits. We can run snagging as its own phase before handover. Repeat call-outs disrupt occupied London buildings, so a proper job first time, with the old sealant fully removed, is worth it.

Quantities, awkward access and phased working all shape the price. Site requirements like inductions and permits play a part as well.

Why appoint us

  • 12-month guarantee on workmanship
  • Clear, fixed quotes
  • One phone line for London, the South East and Scotland
  • Over 20 years of commercial sealing

Take a look at how commercial sealant jobs are priced or our accreditations.

Common problems we fix in Strawberry Hill

A new building moves while it dries and settles. Plaster, screeds, timber and blockwork all shrink as they lose moisture. Choosing the right product for each joint reduces that.

Site and facilities staff are often the first to spot these:

  • Existing joints on a refurb that need cutting out and resealing
  • Frame gaps too wide for sealant alone
  • Sanitary sealant damaged by following trades
  • Internal caulk splitting as the building dries out

University estates such as St Mary's University, less than half a mile south of Strawberry Hill, tend to have a rolling programme of new buildings and refurbishments, each with window perimeters and facade joints to seal.

Comparing quotes

  • How the joint faces will be prepared and primed
  • Can the work be phased to keep areas open?
  • Their approach to joint depth and backing
  • Will failed sealant be removed rather than covered?

Our contractor checklist

Common questions from Strawberry Hill clients

Do you cover business parks and estates near Strawberry Hill, such as Newmans Shipyard & Business Park?

Yes. Our area takes in Strawberry Hill and its surroundings, with estates and business parks such as Newmans Shipyard & Business Park included. Photos and a short description are enough for a first look.

Can you work on a hospital site such as Teddington Memorial Hospital?

Yes. We work in healthcare settings as well as offices and schools. We follow the site’s permits, sign-in and infection-control procedures in every area.

Can you work to our specification?

Yes. Include it with the drawings when you ask for a quote, and the quote will be based on it, flagging anything that needs clarifying.

How long does a typical visit take?

It depends on the scope, though a typical visit usually takes a day or two on a small fit-out and several weeks on a large multi-storey package. For bigger or phased jobs, we will set out a timescale with the quote.

How soon can the area be used again?

Curing time varies by product, and we confirm it on the day, and flag anything to keep off until it has cured.

Can the sealant be colour-matched?

In many cases, yes. Sealants are made in a wide range of standard colours, and matching to RAL references or nearby finishes is commonly requested. We confirm what’s available for the specified product when we quote.

Is it fine to apply new sealant on top of old?

No. We cut the old material out and clean the joint back before sealing, because fresh silicone will not bond with aged silicone.

Owners, agents and contractors

If you look after buildings for someone else, you need clear quotes and clear reporting. We quote a fixed sum, confirm the scope and walk the finished work with you or your representative.

Main contractors use us as their sealant subcontractor. Programme, specification and site rules come first, with CSCS-carded applicators on site.

Accreditations

Trusted. Accredited. Insured.