Dollis Hill construction mastic
Commercial sealant work in Dollis Hill for contractors, FMs and building owners: mastic packages for new-build and refurbishment projects, quoted at a fixed price.
- Early adhesion failures on new external joints
- Internal caulk splitting as the building dries out
- A long mastic snag list close to completion
Construction mastic across Dollis Hill
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 Dollis Hill
On refurbishments, the mastic package usually includes cutting out old sealant as well as sealing new work. Old beads come out completely, as fresh silicone can’t grip old. New and existing joints then get the same preparation. If you have mastic snags holding up handover and a mastic package split between trades with no clear owner, we can put it right, whatever the surface. A specialist sealant contractor works differently from a general builder: on jobs in Dollis Hill, preparation and product choice get the time they need.
Building sites in London tend to be tight: limited storage, booked deliveries and access shared with other trades. Mastic is normally one of the last trades on each elevation or floor, so we keep to the programme and the order of trades the site sets.
We sign every job off with a 12-month guarantee. The promise is simple: if our work fails within that year, we put it right.
- Place
- Dollis Hill (NW2, NW10, NW9)
- Region
- Greater London
- Guarantee
- 12 months on every job
- Price
- Quoted before any work starts
- Telephone
- 01277 525 020
- Updated
- 3 November 2026
How a job runs
A typical day starts with protection: masking tape along the joint edges and sheeting over anything nearby. On site, the work normally takes a few days on a modest refurbishment and longer on multi-plot or multi-storey schemes, and our waste is bagged and taken away as we go. In Dollis Hill, 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.
- Quantities are measured and a fixed price returned.
- The sequence is agreed with the site manager.
- Each area is sealed when it’s released.
- Joints are prepared, backed and sealed to the specification.
- Snags are cleared and the package signed off with our 12-month guarantee.
What we need from you
- Let building users know which areas are affected
- Clear stock, furniture or equipment away from the joints
- Tell us your opening times and when work is allowed
Getting a fixed quote
A good quote starts with a clear picture: what’s there, how much of it, how we reach it and what’s specified. Send what you have, and we will arrange a site visit if anything is unclear.
Advice
Also near Dollis Hill
Also in Dollis Hill
Building and refurbishing in Dollis Hill
A 2-mile radius around Dollis Hill takes in a good number of hotels. When hotels extend or refit, the work is normally squeezed between peak periods, mastic included. Every borough of Greater London is inside the ULEZ, and that applies to contractors’ vehicles on any job in Dollis Hill. Deliveries are booked and storage is tight, so mastic materials come in as needed.
For contractors on a campus like Middlesex University, 2.2 miles to the north of Dollis Hill, facade and perimeter sealing has to fit around students and term dates. Units on estates such as Brent Cross Shopping Park, 0.7 miles north-east of Dollis Hill, tend to be reclad and refitted as tenants change, and each job leaves cladding and perimeter joints to seal.
Dollis Hill is about 1 mile north-east of Neasden, in Greater London. Businesses, contractors and managing agents in Dollis Hill use us for work on mastic packages, as part of our coverage of Greater London. Across Greater London, 764 places are covered, including Dollis Hill. There’s a separate page for London, roughly 7 miles from Dollis Hill.
We cover the NW2, NW10 and NW9 postcode districts for mastic packages. Streets here include Brook Road, Lane Close and Crest Road. Nearby places we also cover include Staples Corner (1 mile north-east), Neasden (1 mile south-west), Cricklewood (1 mile south-east), Willesden (1 mile south) and Brent Cross (1 mile north-east). Nearby towns on our patch include London (7 miles south-east), City of Westminster (5 miles south-east), Marylebone (5 miles south-east), Kensington (5 miles south), St Pancras (6 miles south-east) and Shoreditch (7 miles east).
Around Dollis Hill
In Dollis Hill, that means premises near Woodfield School, The Crown Public House and Gladstone Park and the streets around them. Dollis Hill has its own railway station: Brent Cross West station. A little further out are Brent Cross Shopping Centre (1 mile north-east) and St Andrew's Hospital (less than half a mile south). Green spaces nearby include Darland's Lake and Parliament Hill.
What we’re called out for in Dollis Hill
Shrinkage and settlement in the first months put new joints under strain. Plaster, screeds, timber and blockwork all shrink as they lose moisture, which opens up internal joints, particularly where caulk has been used in a joint that moves. Picking a flexible sealant where there’s movement keeps snags down.
Site and facilities staff are often the first to spot these:
- New external sealant already peeling away
- Caulk cracking where joints are moving more than expected
- Inconsistent sealant finishes from plot to plot
- Missed perimeter joints on a new elevation
On a healthcare site such as BMI Hendon Hospital, 2.1 miles north of Dollis Hill, new blocks and refurbishments go on while the hospital keeps running, so mastic work is sequenced carefully.
Comparing quotes
- The terms of the workmanship guarantee
- How the joint faces will be prepared and primed
- Whether old or failed sealant will be cut out, not overlaid
- Can the work be phased to keep areas open?
Questions about Dollis Hill
Is Brent Cross Shopping Park, near Dollis Hill, within your area?
Yes. Estates, retail parks and business parks around Dollis Hill, Brent Cross Shopping Park among them, are all within reach. To start, just call the office on 01277 525 020 or use the quote form with the unit, the joints involved and your access times.
Can you work in a London building with booked loading and goods-lift slots?
Yes. Booked loading bays, goods lifts and permit-to-work systems are normal for London jobs. Say when the building is occupied and when it’s quiet, and we will plan accordingly. We allow for the ULEZ, which covers every borough
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 before quoting.
How many days will you need on site?
It depends on the scope, though a typical visit normally takes a few days on a modest refurbishment and longer on multi-plot or multi-storey schemes. For bigger or phased jobs, we’ll set out a timescale with the quote.
How do I request a quote?
The quote form is the simplest route, though you can also speak to us on 01277 525 020 or email a schedule or drawings. Photos, drawings or a joint schedule help us quote quickly.
Will you stick to the specified products?
We follow the specified sealant, and we’ll raise it if something in it doesn’t suit the joint. Specifications often reference BS EN 15651 or BS 6213.
Can one quote cover more than one building?
Yes. A group of buildings can go on one quote, with one point of contact across South East England, Greater London and Scotland.
Looking after the joints
Once the work is signed off, a little attention goes a long way:
- Flag uneven or tapered frame gaps early
- Keep product details for future maintenance
- Don’t schedule sealing before decorators and flooring are done
- Plan external elevations with the weather in mind
At handover, keep the product details with the O&M information. That helps the building owner maintain the joints later, and tells you what to reseal with. Tell us what records you need and we will confirm with the quote.
A missed perimeter seal on one window can wet the reveal and the plaster inside. That usually means redoing finishes in a completed area and possibly a delayed handover. A check of every frame before decorators start is worth the time.
Honest limits
A proper diagnosis includes knowing what sealant can’t do. We will tell you if the real problem is one of these:
- Faulty frames rather than failed sealant
- Designing joint widths or choosing the specification (that sits with the designer)
- Rework caused by others damaging completed areas
If in doubt, call the office on 01277 525 020 or use the quote form and we will say what we think.
What we seal
- Floor and skirting junctions
- Sanitary and kitchen joints
- Brick and block movement joints
- Cladding and panel joints
- Internal decorators’ caulk
- Window and door perimeters
Site staff or a sealant specialist?
A short, simple internal joint is often within reach of a maintenance team. The usual problems come from preparation: sealing over old material, sealing onto damp or dusty surfaces, or a product that can’t take the movement.
The visible bead is only part of the job. Correct depth, the right primer and a sealant matched to the movement are easy to get wrong without experience.
Different surfaces, different methods
External facade and movement joints
External movement joints often need primer, depending on the substrate. Primer goes on where the sealant maker calls for it and work only when conditions suit.
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.