West Sussex · England
Haywards Heath Sand Mastic
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for homeowners, landlords and businesses in Haywards Heath. Fully insured, ARBOMaster approved and guaranteed for a year.
- Wind and rain getting in round a sash window
- Open joints round the window box
- Gaps round a timber door in stone or brick
Honest limits
It helps to know what we cannot do too:
- Putty and glazing repairs
- Sash cords, weights and draught-proofing of the sashes
- Timber that has rotted
If in doubt, ring 0345 464 0079 or send us an email and we will say what we think before you book.
Joints and surfaces we work on
- Tenement windows
- Period & listed homes
- Sash and case windows
- Brick reveals
- Stone surrounds
- Timber door frames
Sand mastic in Haywards Heath
Sand mastic suits most period window surrounds. Newer frames normally get a flexible sealant instead and we will explain which is best for yours. If you are dealing with tired mastic found when preparing windows for paint and modern sealant on a period surround, we can put it right, whatever the surface.
In a town like Haywards Heath, older houses sit alongside newer estates, with windows of every age. In every case, the joint between frame and wall is what keeps water out.
We guarantee the work for a year. If something isn’t right with it in that time, tell us and we will put it right.
- Location
- Haywards Heath (RH16, RH17)
- Region
- West Sussex
- Guarantee
- 12 months on all our work
- Quote
- A clear price before any work starts
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
Looking after it afterwards
A little care helps the new joints last. We recommend:
- Avoid heavy scraping on the mastic joint
- Have rotten timber repaired before new mastic goes in
- Inspect the joints round the windows every year or so
- Clear gutters so water does not pour onto the windows
Make sure water drains away from the window surround. Water sitting against the mastic shortens its life.
It’s best to renew mastic before painting the windows. Paint over cracked mastic only covers it up.
How it works
You do not need to clear the whole room or building before we come, only the area right around the joints. We protect the rest, and the work takes a few hours per window, depending on the condition of the joints for a typical job. In Haywards Heath, parking is rarely complicated, though it helps to know about driveways or restrictions, and mention if the work is upstairs, in a flat or high on the outside.
- We start by checking each surround and agreeing the joints to renew.
- The loose and crumbling mastic is raked out and the joint cleaned.
- Large voids are packed out first, so the mastic is not too thick.
- We mix the sand mastic and apply it by hand, shaping it to the joint.
- The mastic is finished to sit tidily against the stone or brick.
Preparing for the visit
- Move anything stored near the joints
- Mention if the joints have been sealed before
- Mention any leaks or damp you’ve noticed
Get a quote
We quote each job on its own, so start by telling us what you need. Simply ring 0345 464 0079 or send us an email and describe the job and send pictures if you have them.
Read more
Sand mastic in Haywards Heath: local notes
Historic houses like Ockenden Manor (about 2.1 miles west) are a reminder that the area around Haywards Heath has older buildings as well as new. Where a home is older, older timber frames in brick or stone need a different approach from a modern uPVC window. Compared with the north and west, the South East gets less rain, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
Managing a site like Warden Park Primary Academy? Then larger buildings have plenty of frames, and the mastic around each one ages. If you let a flat or house near Haywards Heath station, any sash windows need sound mastic to keep draughts and rain out. For an older house near a landmark such as Church of the Presentation, the joint between an old wall and a newer frame is usually the first place rain gets in.
Haywards Heath is about 9 miles south-east of Crawley, in West Sussex. Anywhere in RH16, our applicators can take on sand mastic. Haywards Heath is one of 371 towns and villages in West Sussex we cover for sand mastic. For nearby work, see our Crawley page.
All of RH16 and RH17 is covered for sand mastic, from the main roads to the quietest streets. We cover properties on Church Road, Market Place and High Street and the roads around them. Haywards Heath sits on or near the A272 and B2028, so getting to you is simple. Neighbouring places we cover for sand mastic include Scaynes Hill (2 miles east), Wivelsfield (2 miles south), Wivelsfield Green (3 miles south-east), Ditchling Common (4 miles south) and North Chailey (4 miles south-east). We also work in nearby towns such as Crawley (9 miles north-west), Horsham (11 miles north-west), Burgess Hill (3 miles south-west), East Grinstead (10 miles north-east), Shoreham-by-Sea (14 miles south-west) and Lancing (15 miles south-west). Haywards Heath is one of the larger places we cover in West Sussex.
Local landmarks in Haywards Heath
Around Haywards Heath, our work takes us to homes and buildings near The Heath Tavern, Scrase Valley and Tavistock and Summerhill School and the streets around them. For rail, the closest station is Haywards Heath station, roughly 0.6 miles north-west of the centre. Other landmarks nearby include Waterbury Castle (3.8 miles north-east) and St Francis & Hurstwood Park Hospital Museum (0.8 miles north). Open spaces near Haywards Heath include Ashenground and Bolnore Woods.
DIY versus a professional finish
What a professional job adds is preparation and the right product. Joints are cleaned back to sound surfaces and dried, and the sealant is chosen for how the joint moves and where it is, and the work is guaranteed for a year.
Not every job suits DIY: high-level joints, fire-rated gaps, external movement joints and big jobs call for the right materials, safe access and experience.
What affects the quote in Haywards Heath
Every job gets its own quote. These are the things that affect it:
- The size of the job
- Whether the work is at height
- The type of sealant required
- How many rooms, windows or areas are involved
We do not show prices on the website, because the cost depends so much on the job itself. Call for a quick quote.
What we need to know
Photos help, but a description is a good start. Try to tell us:
- Whether it has been sealed before
- Any access issues, like height or stairs
- Photos by email, if that’s easy
- The rough size of the job
If you are in Haywards Heath and need sand mastic, phone 0345 464 0079 or drop us an email. Tell us what the problem is and where, and we will agree the price before any work begins.
Nearby places to Haywards Heath
What else we do in Haywards Heath
Landlords, agents and businesses in Haywards Heath
In hotels, rooms out of use cost money, so the work can be planned room by room. Hotel work is part of what we do, alongside homes and businesses.
Whether it’s one flat or a portfolio, you get the same standard of work: old sealant fully removed, joints prepared properly and a one-year guarantee.
Common questions in Haywards Heath
Is sand mastic in Haywards Heath guaranteed?
Every job comes with our one-year guarantee, wherever it is. We are fully insured, and an ARBOMaster approved applicator.
Do you cover Haywards Heath for sand mastic?
Yes. We work across London and the South East, and Haywards Heath is part of that. Just phone 0345 464 0079 or drop us an email with a few details of the job.
What information do you need?
A short description and the location. If we need more, we’ll ask.
Do I have to be there?
We need access to the joints, so we will agree that with you when we book. For inside work, that normally means someone being in.
Do you hold any approvals?
Yes. We’re ARBOMaster approved, the scheme for applicators of Arbo sealants.
How long does sand mastic take to go off?
A skin forms quite soon, but full hardening takes longer. We’ll explain what to expect before we leave.
Can tenants book the work?
Yes, but check with your landlord or agent first. Many landlords are glad to have it sorted.
How long does sand mastic take?
Most jobs take a few hours for a single window, longer for several. We’ll confirm how long when we quote.
Leave it or put it right?
Silicone might seem the quicker option, but on period stone or brick it often looks out of place. Sand mastic suits the building and finishes neatly against the masonry. In a family home in Haywards Heath, a failed seal around a bath or a frame lets water into places you can’t see, like the floor under a bath, the back of a panel or the inside of a wall. Whatever the joint, failed sealant only gets worse.
Commercial jobs are quoted on the same basis as homes: the amount of work, how we reach it and what it needs. Call for a quick quote and we will go through it with you.
Why us?
- A 12-month guarantee on all work
- 180+ five-star Google reviews
- Anti-fungal silicone where joints get wet
- We never seal over old sealant
Read what affects the cost and our reviews.