West Sussex · England
Window & door mastic in North Heath, West Sussex
Mastic around window and door frames, sills and patio doors for North Heath, backed by a one-year guarantee. Call for a quick quote.
- Sealant in the wrong colour for the frame
- Draughts coming in around windows and doors
- Gaps left after new windows were fitted
Window mastic in North Heath
A window frame and the wall around it expand and shrink at different rates. Heat and cold make frames grow and shrink against brick or render that hardly moves. So the sealant has to stretch and recover, which is why we use a low-modulus product. We work on aluminium frames, composite doors and uPVC windows, and common reasons people get in touch are cracked internal joints between frame and plaster and sealant in the wrong colour for the frame.
Mastic can only go onto a dry, clean joint, so window work in North Heath is booked around the forecast. Let us know about access to all the frames, upstairs ones included.
Each job carries a 12-month guarantee.
- Location
- North Heath (RH20)
- Wider area
- West Sussex
- Cover
- A year, on every job
- Quote
- Quoted before any work starts
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
Aftercare tips
No joint lasts for ever, but care makes a real difference. A few tips:
- Do not use solvent cleaners on the joint
- Keep drainage slots and sill grooves clear
- Do not paint over the silicone
- Use gentle cleaners on frames and sealant
Clean the frames with mild soapy water, and avoid solvent cleaners on the sealant.
A small gap around a frame only grows. As the old mastic shrinks further, more air gets through, and a cold room gets colder. Resealing closes it.
North Heath homes and the weather
The South East is one of the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind. Historic houses like Old Place Manor (about 2.1 miles south-west) are a reminder that the area around North Heath has older buildings as well as new. In older buildings, older frames set in brick or stone need a sealant that suits them, and sometimes that is traditional sand mastic.
Historic houses such as Old Place Manor, about 2.1 miles south-west, show how far back building around North Heath goes, and older homes nearby need a sealant that suits their walls.
North Heath is about 9 miles south-west of Horsham, in West Sussex. From the centre of North Heath to the outskirts, window mastic is available for homes and businesses alike. Across West Sussex, we cover 371 places, North Heath among them. For nearby work, see our Crawley page (15 miles or so).
Every address in RH20 is covered for window mastic, from the main roads to the quietest streets. Local streets include Gay Street Lane and Stane Street, and we cover them all. We also cover the places around North Heath: Gay Street (1 mile south-east), Adversane (1 mile north), Codmore Hill (1 mile south-west), Broomershill (1 mile south) and Nutbourne (2 miles south). Larger places within reach include Crawley (15 miles north-east), Horsham (9 miles north-east), Worthing (11 miles south), Burgess Hill (15 miles east), Littlehampton (12 miles south) and Shoreham-by-Sea (14 miles south-east).
Around North Heath
The nearest railway station is Pulborough station, roughly 2.4 miles south-west of the centre. For a walk, there’s The Mens.
Different surfaces, different methods
Patio & French doors
The joints around patio doors run a long way, top, sides and threshold. The threshold and the bottom corners take the most water, so we pay close attention there.
Composite doors
A composite door generally sits in a plastic outer frame, so its perimeter joint is sealed much like a window. We match the colour to the frame.
Do you need window mastic in North Heath?
Older frames were often sealed with products that set hard. Once it has hardened, the frame’s movement tears it from the wall, and a gap opens along one edge.
The most common problems we see are:
- Cracked sealant at the sill ends
- Whistling draughts around closed windows
- Damp patches on the reveal after heavy rain
- Mastic that is falling out in pieces
If you let a flat or house near Pulborough station, renewing tired window mastic between tenants heads off draught and damp complaints.
What to look for in a quote
- Whether they’re fully insured
- Whether the sealant suits the joint
- How long the guarantee is
- What the cure time is
What happens on the day
We bring everything the job needs with us. After a quick look at the joints together, the area is protected and the work begins. Most jobs take a few hours for a handful of frames, longer for a whole house. For a village or hamlet like North Heath, the journey is planned in advance: let us know about lanes, gates and parking. We bring what the job needs, so it can be finished in one trip where possible.
- First, we go round the frames with you and agree the list.
- We remove the old mastic and clean the frame edge and wall.
- Deep gaps get closed-cell backing rod to set the depth.
- The new sealant goes on in white, brown, anthracite grey, black or clear to suit.
- Every joint is tooled smooth and checked before we leave.
Preparing for the visit
- Let us know about parking restrictions
- Let us know about earlier repairs to the joints
- Mention any leaks or damp you’ve noticed
How to get a quote
Call for a quick quote, or email us if that is easier. Tell us about the joints that need doing and we will explain what’s involved and give you a clear quote.
Related advice
Places near North Heath
Other services in North Heath
Work for landlords, hotels and businesses
We also work for businesses, from offices to washrooms and kitchens. For commercial premises, we can talk through working times when we quote.
We regularly work with letting and managing agents. Send the address, what’s needed and the access arrangements and we’ll give you a quote.
Quotes for window mastic in North Heath
Call for a quick quote. What matters most is:
- Mould in or behind the old joints
- How much there is to do
- The type of sealant required
- Working hours on commercial sites
Some things make a job bigger or smaller: the old material and how easily it comes out, any mould to treat, and whether we need extra access for height. Your quote takes all of that into account.
Asking for a quote
Before you ask for a quote, have a think about:
- The rough size of the job
- Whether it’s a home or a business
- Where the property is
- Photos by email, if that’s easy
We quote each job on its own, so the first step is telling us about yours. Just call 0345 464 0079 or drop us an email with the details.
Your questions about window mastic in North Heath
Do you work for landlords with property near Pulborough station?
Yes, rental work is part of what we do. Just phone 0345 464 0079 or email us and tell us about the property, and we will send you a clear quote.
Is North Heath within the area you cover?
Yes. North Heath is within the area we cover, which takes in towns, villages and rural addresses. Our work covers London and the South East. Just mention lanes, gates or anything else about the route when you book.
Do you have insurance?
Yes. Mr Mastic is fully insured, and we have been doing sealant work for more than 20 years.
Do you guarantee window mastic?
Yes. Every job comes with our one-year guarantee, and we’re fully insured.
When is the sealant fully cured?
Most sealants are touch-dry well before they’re fully cured. We will tell you how long to leave the joint.
Will there be a smell?
Some sealants have a smell while they cure, but it fades. Opening a window helps.
Are you ARBOMaster approved?
Yes. We are approved under the ARBOMaster scheme, which is run for the Arbo sealant brand.
Can I paint over the new sealant?
It depends on the sealant. Silicone isn’t paintable, but some hybrid sealants are. Mention any painting plans before we start.
Honest limits
Sealant isn’t the answer to every problem, and we’ll tell you before any work starts. Sealant won’t put right:
- Damp coming through the wall itself rather than the frame joint
- Draughts through the window seals rather than the frame
- A sash or casement that won’t close properly
If in doubt, call 0345 464 0079 or send us an email and we will say what we think.
What we seal
- uPVC windows
- Window sills
- Composite doors
- Timber windows & doors
- Patio & French doors
- Aluminium frames