Shortlands construction mastic
Sealant work in Shortlands for main contractors, managing agents and facilities managers: mastic packages for new-build and refurbishment projects, with a fixed quote first.
- Oversized or tapered gaps around new frames
- Mastic snags holding up handover
- Existing joints on a refurb that need cutting out and resealing
Need construction mastic in Shortlands?
Send drawings, photos or a joint schedule, or tell us about the site, and we’ll come back with a fixed quote.
How we handle construction mastic in Shortlands
The programme rarely stands still, so the mastic package has to flex with it. We agree a sequence at the start and adjust it as the site manager releases areas and we don’t seal before other trades have finished in an area. Sealing too early only means coming back once others have damaged it. If you have external joints sealed in damp or cold conditions that are now failing and missed perimeter joints on a new elevation, we can put it right, on cladding and panel joints, internal decorators’ caulk and floor and skirting junctions alike. One point of contact handles commercial sealant work in Shortlands from the first photographs to the final walk-round, for single jobs and planned programmes alike.
Building sites in London tend to be tight: small compounds, delivery slots and shared hoists and scaffold. We fit around the programme, sealing each elevation or floor as other trades hand over.
We stand behind the joints we seal with a 12-month guarantee. It covers how we prepared and applied the sealant.
- Where
- Shortlands (BR2, BR1, BR3)
- Region
- Greater London
- Guarantee
- A 12-month guarantee
- Price
- Fixed quote, scope in writing
- Phone
- 01277 525 020
- Page updated
- 3 November 2026
From enquiry to sign-off
Working in a building that stays open takes some planning. The work area is signed and kept contained, with routes through the building left open and work section by section so the rest of the building stays in use. In Shortlands, most buildings stay in use during the work, so zones and timings are agreed with whoever manages the building. Areas are handed back as each section is finished.
- We start with the drawings, specification and programme.
- We take off quantities and return a fixed quote.
- We agree with the site team which areas come first.
- 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.
Preparing the site
- Have the specification and drawings to hand
- Point out any areas we must not close
- Flag any permit to work we will need
Request a quote
To get a fixed quote, phone 01277 525 020 or email a schedule or drawings with the site address and an outline of the work. You can also send details through our quote form.
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Your questions answered
Will you plan work around the academic year at somewhere like University of Greenwich - Avery Hill?
Yes. Tell us the term dates, vacation periods and access windows, and we’ll plan the work around them. We are CHAS accredited and a Constructionline member, and paperwork such as RAMS is confirmed with the quote.
Do you take on work at healthcare sites like Sloane Hospital?
Yes, healthcare and care buildings are part of our work. The estates team’s permit system and infection-control rules come first, and the work is planned around them.
Can you work to our specification?
Yes. Send it with your enquiry, and the quote will be based on it.
Do you install fire-rated sealant as part of a package?
It can be part of the package where specified. Tell us what records you need and we’ll confirm with the quote.
Are you fully insured?
Yes. Mastic Doctor is fully insured, public liability included.
Does weather affect external mastic work?
Conditions have to suit the product before external work starts. Sealing in poor conditions risks adhesion failure so it’s better to wait.
What do you charge?
That depends on the job: the volume of work, the access, the specified product and how it’s phased. Call for a quote and we will price it properly.
Building owners, agents and FMs in Shortlands
Hotels, schools, healthcare sites, offices and retail units come to us directly as well. We plan around the way the building is used, so guests, pupils, patients or staff are disturbed as little as possible.
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.
After the work
Every sealant joint needs some looking after, and how long they last depends on how they’re treated. We suggest:
- Release areas for mastic once other trades have finished in them
- Ask installers to correct oversized gaps first
- Ask for joint and product checks before the package is urgent
- Keep product details for future maintenance
A new structure shifts as it loses construction moisture. The right product in each joint copes with that. We can advise if a joint needs a different product.
External joints sealed in poor weather are a common cause of early failure. Waiting for a dry joint and the right temperature is better than redoing work so external sequencing builds in some flexibility.
What the job involves on each surface
Kitchens and utility areas
On commercial kitchen fit-outs, hygienic sealants are often specified. We follow the specification and seal to a smooth, cleanable finish.
Snagging before handover
Damaged, missed or untidy joints make up most snag lists. Snagging can be included or priced separately.
Also near Shortlands
More services for Shortlands
Why deal with it now?
Getting the mastic contractor involved early pays off. We can check joint widths, flag frames with gaps that won’t seal and confirm products against the specification. Leave it late and they turn up on the snag list. Repeat call-outs disrupt occupied London buildings, so cutting the old sealant out fully and doing it right once is the better route.
Whether it’s a single area or a whole estate, the same things set the price: scope, access, product and programme. Call for a quote, and you’ll have a fixed figure to work with.
Why appoint us
- CHAS accredited contractor
- Specification-led, product-correct work
- Commercial sealant work since 2005
- Matching to RAL references, product permitting
See what affects the cost and our accreditations and insurance.
When to bring in a specialist
Certain joints really need a specialist: for example fire-rated seals that must match a tested detail, trafficked floor joints and external movement joints. A poor seal in places like these tends to cost more to put right later.
Site maintenance staff can often handle a short internal joint. The usual problems come from preparation: new sealant over old, damp or dusty faces, or the wrong product for the movement.
Facades, frames and programmes in Shortlands
There are several hotels within about 2 miles of Shortlands. Hotel extensions and refits normally have to fit around bookings, so mastic dates are tight. Site traffic in Shortlands falls within London’s ULEZ, like everywhere else in Greater London. Delivery slots and scarce storage shape how and when the mastic goes in.
Recladding or extending a unit at a site like Chartwell Business Centre (to the east of Shortlands) brings panel joints and frame perimeters into the programme. For a contractor working at a hospital such as Sloane Hospital, 0.8 miles north-west of Shortlands, perimeter and facade sealing is planned around patients and deliveries. Further education sites such as Bromley College, 1.6 miles south-east of Shortlands, are extended and refurbished from time to time, with mastic often programmed into the summer break.
Shortlands is about 1 mile south-west of Bromley, in Greater London. If you are looking for construction mastic in Shortlands, we can help, as we do across Greater London. 764 places across Greater London fall within our area, Shortlands among them. For work in that direction, see our London page, about 8 miles away.
We cover the BR2, BR1 and BR3 postcode districts. We cover commercial and managed buildings on Hayes Lane, Stone Road and Hayes Road and the roads nearby. Close to Shortlands, our area also takes in Eden Park (1 mile south-west), Hayes (2 miles south), Bromley Common (2 miles south-east), West Wickham (2 miles south-west) and Southborough (2 miles east). A short drive away, we cover London (8 miles north-west), City of Westminster (10 miles north-west), Marylebone (11 miles north-west), Kensington (11 miles north-west), St Pancras (10 miles north-west) and Shoreditch (10 miles north).
Near you in Shortlands
Locally, jobs take us to sites close to The Richmal Crompton pub, Church House Gardens and Langley Park School for Girls, among other places. The nearest railway station is Shortlands station, roughly 0.5 miles north of the centre. Other landmarks nearby include Bromley Hospital (0.7 miles east) and Bethlem Museum of the Mind (1.6 miles south-east). Not far away are Summer Hill and Downham Woodland Walk.