West Sussex · England
Window & door mastic in Gay Street, West Sussex
Window mastic for Gay Street, by sealant specialists with 20+ years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Gaps between the frame and the inside reveal
- Cracked or shrunken mastic around the frame
- Old mastic that has gone black or come away
How the visit works
The work is kept neat and contained to the joints we’re treating, so you can get on with your day. The job usually takes most of a day for a typical house, less for a few frames. Somewhere as small as Gay Street, access is often the only tricky part. For outside work, also let us know about exposed walls and any outbuildings involved.
- First, we go round the frames with you and agree the list.
- The old mastic is cut out and scraped back to clean surfaces.
- Where the gap is deep, backing rod goes in first.
- The new sealant goes on in white, brown, anthracite grey, black or clear to suit.
- We tool each bead neatly and check every joint is closed.
Getting ready for the visit
- Mention any tricky access
- Mention if the joints have been sealed before
- Where the joints are inside, avoid wetting them before we arrive
Get a quote
Every job is quoted individually, so the first step is telling us about yours. Just ring 0345 464 0079 or drop us an email with the details, and pictures are welcome.
Related advice
Window mastic for homes and businesses in Gay Street
Some gaps around frames are far deeper than they look. Packing it solid with sealant gives a joint that can’t flex, so deep gaps get backing rod first. That way the new bead bonds to the frame and the wall only. If you have hard, cracked sealant around windows and cold air getting in at the frame edge, we can put it right, on window sills, composite doors and patio & French doors alike.
Outdoor sealant needs dry, clean surfaces, so work on frames around Gay Street is planned for dry weather. Let us know about access to all the frames, upstairs ones included.
The work is covered for a year after we finish. If anything is not right with it, ring 0345 464 0079 or email us.
- Place
- Gay Street (RH20)
- Region
- West Sussex
- Guarantee
- One year on every job
- Price
- A clear quote up front
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
Why deal with it now?
Getting a straight, even bead on an outside frame takes practice, especially upstairs. A professional job is cut out properly, backed where needed and finished neatly, using a product chosen for the frame and wall. Where a wall is exposed, as many are in small places like Gay Street, wind-driven rain gets into any failed joint, and older walls, once damp, take a long time to dry.
A few things move the cost up or down: how much old sealant there is and how stubborn it is, whether mould needs treating, and whether we need extra access for height. Your quote takes all of that into account.
Why us?
- 180+ five-star Google reviews
- Tidy, careful work
- Sanitary silicone with an anti-fungal additive in wet areas
- Quality sealants from Arbo and Everbuild
See our cost guide and our reviews.
Window mastic in Gay Street: local notes
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 2.4 miles south-west) are a reminder that the area around Gay Street 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.
Letting a property close to Pulborough station? Then sound mastic around windows and doors keeps out the draughts and damp that tenants notice first.
Gay Street is about 9 miles south-west of Horsham, in West Sussex. From the centre of Gay Street to the outskirts, we cover window mastic for every kind of property, from flats and houses to offices and hotels. Across West Sussex, we cover 371 places, Gay Street among them. For nearby work, see our Crawley page (15 miles or so).
All of RH20 is covered for window mastic. We also cover North Heath (1 mile north-west), Nutbourne (1 mile south), Broomershill (1 mile south-west), West Chiltington (2 miles south) and Codmore Hill (2 miles west). We also work in nearby towns such as 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 (13 miles south-east).
Local landmarks in Gay Street
For rail, the closest station is Pulborough station, roughly 2.7 miles south-west. The countryside around Gay Street includes The Mens.
Different surfaces, different methods
Timber windows & doors
Timber moves with moisture as well as heat, so a flexible sealant is essential. The paint or stain needs to be sound where the sealant meets it.
uPVC windows
Fitters’ mastic on plastic frames is sometimes thin and rushed. It comes out, deep gaps get backing rod and the joint is resealed.
Looking after it afterwards
To keep the joints looking good and working properly:
- Keep drainage slots and sill grooves clear
- Keep paint off silicone joints
- Use gentle cleaners on frames and sealant
- Ventilate rooms so frames don’t stay wet inside
Keep the new mastic undisturbed while it cures, following the cure time we give you. Do not point a pressure washer at the joints.
Water gets in quietly when mastic fails. Often the first sign is a damp patch inside or flaking paint on the reveal. Catching it early keeps the fix to a reseal.
Towns and villages near Gay Street
What else we do in Gay Street
Your questions about window mastic in Gay Street
Can you do window mastic in Gay Street?
Yes, Gay Street is within the area we cover. Our work covers London and the South East. Just ring 0345 464 0079 or drop us an email with a few details of the job.
Can you help a landlord with a rental near Pulborough station?
Yes, landlords and agents are among the people we work for, and several properties can go on one quote. You can call 0345 464 0079 or drop us an email with the details for a clear quote.
Can you get sealant to suit coloured frames?
Yes, in most cases. Mention the frame colour when you ask for a quote and we will match it as closely as we can.
Do you hold any approvals?
Yes. Mr Mastic is an ARBOMaster approved applicator, and we’re fully insured.
What information do you need?
Let us know what needs doing and where, plus pictures if you have them. If we need more, we’ll ask.
Do you do commercial work?
Yes. We’ve worked for hotels, offices and other businesses.
Do you seal inside as well as outside?
Yes. Draughts often come through the inside gap too, so sealing both is often worthwhile.
Is it OK to seal over old sealant?
No. The old sealant always comes out first, so the new sealant bonds properly.
What we are called out for in Gay Street
Older frames were often sealed with products that set hard. Once it’s rigid, every bit of frame movement pulls at it, and a gap opens along one edge.
Any of these means the joints need attention:
- Black, perished sealant on frames
- Cracked or shrunken mastic around the frame
- Whistling draughts around closed windows
- Untidy mastic left by window fitters
Historic houses such as Old Place Manor, about 2.4 miles south-west, show how far back building around Gay Street goes, and older homes nearby need a sealant that suits their walls.
Before you book anyone
- Who does the work, and how experienced they are
- What the cure time is
- What happens if they find a problem under the old sealant
- Whether you can choose the colour
Can I do it myself?
Some sealant jobs are within reach of a careful DIYer, such as a straightforward joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
If you do try it yourself, take your time over the preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it fails, we can still redo it.
When it isn’t the sealant
We’ll always be straight with you, so here’s what sealant can’t fix:
- A sash or casement that won’t close properly
- Damp problems in the wall away from the window
- A frame that has rotted at the joint
If you are not sure, just ring 0345 464 0079 or drop us an email and we will give you a straight answer.
What we seal
- Timber windows & doors
- Composite doors
- Window sills
- Patio & French doors
- Aluminium frames
- uPVC windows