The Mastic Doctor team standing beside their branded vans outside an office building
West Sussex · England

Mastic sealing for building owners and managing agents in Furnace Wood, West Sussex

Mastic sealing for building owners, managing agents and housing associations across Furnace Wood, carried out by CSCS-carded applicators. CHAS accredited and fully insured.

  • Water getting in round frames after rain
  • Old repairs sealed over failed mastic
  • Worn sealant at communal door frames
1
Send details
Send the specification, photos or a marked-up plan.
2
Get a quote
A fixed quote for the work, with the scope in writing.
3
We seal
Failed joints cut out, faces prepared, new sealant laid.
4
Guaranteed
Backed by a 12-month workmanship guarantee.
South East, London & Scotland
CHAS accredited
£5m public liability

Mastic sealing in Furnace Wood

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

Cost factors for mastic joints

Before we quote, we look at:

  • Access and working height
  • Whether the work must be split into stages
  • How much there is to seal
  • Location, for remote and island sites

Access can matter as much as the joints themselves: easy-to-reach joints are quicker than those that need equipment to get to. Mention the access as part of your enquiry.

Before you send an enquiry

Whether it’s one area or a whole building, the same details help:

  • Your programme or deadline
  • Anything awkward about access or site hours
  • The postcode of the building
  • Whether an asbestos survey exists

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

Mastic sealing for commercial buildings in Furnace Wood

We diagnose before we prescribe: which joints have failed, why, and whether sealant is the right answer. Failed mastic is stripped, the faces taken back to sound material, primed where the manufacturer specifies and resealed, with backing rod setting the depth where it’s needed. We work on communal entrances and stairwells, external wall and movement joints and shopfronts below residential blocks, and what we’re called in for most is mastic failing across several blocks on an estate and window mastic that has split and shrunk. Sealant applicators who only do sealant are a different proposition from a general trade with a gun in the van: on jobs in Furnace Wood, preparation and product choice get the time they need.

Around smaller places like Furnace Wood, older walls fitted with newer windows are a familiar sight. The mastic needs to suit an irregular masonry face and the look of the building.

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.

Mastic Doctor team members lined up next to their branded vans outside an office building
Location
Furnace Wood (RH19)
Region
West Sussex
Cover
12 months on our workmanship
Price
Quoted before any work starts
Call
01277 525 020
Last updated
3 November 2026

Questions about Furnace Wood

Is Furnace Wood too far out for you?

No. Places such as Furnace Wood are covered as much as the big towns. London and every South East county are within our area. We plan jobs in smaller places so return trips are kept to a minimum.

Can you work in a care home near Furnace Wood with residents in?

Yes. We agree rooms and times with the manager and work a few areas at a time. Any site rules, from signing in to infection control, are agreed before we start.

Can you reseal a whole block or estate?

We can. We survey and price each building, then work through them in order, and the programme can start with the worst.

How do you choose the sealant?

Where there’s a specification, we use the product it names. Otherwise, we recommend a product to suit the joint’s movement, the substrate and the conditions, following the manufacturer’s guidance.

Do you work to architects’ specifications?

Yes. We follow the specification, along with the manufacturer’s installation guidance.

How many days will you need on site?

It depends on the scope, but the work typically takes one or more days per building, depending on the joint lengths and the access. For bigger or phased jobs, we will set out a timescale with the quote.

How long before the joints can be used?

Curing time varies by product, and we confirm it on the day.

Mastic sealing around Furnace Wood: how the place shapes the job

Furnace Wood has three care or nursing homes no more than 2 miles away. Frame mastic on care buildings is best renewed elevation by elevation, with the manager deciding timings. Furnace Wood is about 25 miles from central London. Commuter-belt towns tend to have plenty of managed blocks near stations and town centres.

For a school such as Felbridge Primary School, perimeter mastic on windows and doors is a holiday job. For agents with blocks near East Grinstead station (2.5 miles south-east of Furnace Wood), a block-wide mastic programme deals with frames, balconies and entrances in one go.

Furnace Wood is about 3 miles west of East Grinstead, in West Sussex. Anywhere in RH19, the process is the same: details in, fixed quote out, then sealing and a 12-month guarantee. Furnace Wood is one of 373 places we cover in West Sussex. Brighton is covered too, some 21 miles away.

Commercial sites across RH19 are covered. If your site is on Lake View Road, Felcot Road and Furnace Farm Road or close by, we can quote for mastic joints. Close to Furnace Wood, our area also takes in Domewood (1 mile north-west), Snow Hill (1 mile west), Felbridge (1 mile east), Crawley Down (1 mile south) and Newchapel (2 miles north-east). A short drive away, we cover Crawley (6 miles west), Horsham (12 miles south-west), Haywards Heath (10 miles south), Burgess Hill (13 miles south), East Grinstead (3 miles east) and Broadfield (7 miles south-west).

Around Furnace Wood

We work on buildings around Imberhorne School. For rail, the closest station is East Grinstead station, roughly 2.5 miles south-east of the centre. Well-known places in the area include Effingham Park Motor Museum (0.9 miles west) and Queen Victoria Hospital (3.1 miles east). For a walk, there’s Hedgecourt Lake.

Map of Furnace Wood © OpenStreetMap contributors

Should maintenance staff do it?

There’s also the paperwork. Main contractors and clients often ask for CSCS cards, RAMS and insurance details, and our CSCS-carded applicators are used to working under those rules.

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.

How the job changes by surface

Tenement and older buildings

Older buildings, including Scotland’s sandstone tenements, have their own joint details. We look at the substrate before choosing a sealant.

External movement joints

Movement joints are cleaned out, backed with rod and resealed with a sealant of the right movement class.

On site: what to expect

Before any cutting starts, the area is protected: masking tape along the joint edges and sheeting over anything nearby. On site, the work normally takes a few days for most blocks, with larger programmes scheduled building by building, and we clear our waste as we work. For a building around Furnace Wood, tell us how to find it and who will meet us. Send that with the details and we will confirm the plan with the quote.

  1. We check the asbestos register for older buildings and look at the joints.
  2. The products and programme are set out in a fixed quote.
  3. We strip out the old sealant.
  4. Joint faces are cleaned, backed and resealed.
  5. Buildings are completed in turn.

Preparing the site

  • For older buildings, check the asbestos register before work
  • Send your site hours and access windows
  • Make sure the joints can be reached

Getting a fixed quote

A good quote starts with a clear picture: the joints involved, quantities, access and the product called for. Share whatever details you have and we’ll fill any gaps with a visit.

Get a quick quote

Advice

Leave it or put it right?

Draughts round window perimeters cost occupiers comfort and the windows typically get the blame. Resealing the perimeters is often the simpler fix where the frames themselves are sound. Around Furnace Wood, it’s better to renew all the failing joints at once. Send photographs of each area and we will quote for the lot.

There’s no price list, since every building and every scope is different. Call for a quote and we will price your job on its own details.

Why clients in Furnace Wood choose us

  • A Constructionline member, so easy to vet
  • Old sealant cut out, never sealed over
  • Public liability insurance in place
  • CSCS-carded applicators

See what affects the cost or our accreditations and insurance.

Common problems we fix in Furnace Wood

The edges of the material itself sometimes break away for example where render or brick edges crumble. If the edges are unsound, we say so before quoting the sealing.

These are often picked up first by site or facilities staff:

  • Mastic failing across several blocks on an estate
  • Draughts at frames across a block
  • A mix of products and colours from past repairs
  • Communal area joints that look neglected

Historic properties like Saint Hill Manor, 3 miles south-east of Furnace Wood, show the age of some local stock, where frame mastic must suit soft brick or stone.

Questions to ask before you book

  • Their approach to joint depth and backing
  • Who will actually carry out the work
  • How long is the guarantee, and what does it include?
  • The named product and why it was chosen

How to choose a sealant contractor

Accreditations

Trusted. Accredited. Insured.