West Sussex · England
Codmore Hill Sand Mastic
We cover Codmore Hill for traditional burnt sand mastic around sash and case windows and doors in stone and brick. Old material cut out, joints cleaned and sealed neatly and a 12-month guarantee.
- Modern sealant on a period surround
- Cement or filler used on old window joints that has cracked
- Mastic worn away on windows facing the weather
Landlords, agents and businesses in Codmore Hill
From a single let to a portfolio, you get the same standard of work: the old material taken out, careful preparation and a 12-month guarantee.
We also work for businesses, from offices to washrooms and kitchens. For commercial premises, we can talk through working times when we quote.
About our sand mastic in Codmore Hill
Fresh sand mastic forms a skin quite soon, but it takes longer to harden fully. Traditional guidance is not to paint over it, so ask us before you decorate. Common call-outs are for gaps round a timber door in stone or brick and draughts and rain around sash boxes, across sash and case windows, stone surrounds and timber door frames.
Around Codmore Hill, many homes face open ground, so their windows and doors take the full weather. Exposed frames and sills lose their mastic sooner than sheltered ones.
Big or small, it’s backed by our one-year guarantee.
- Location
- Codmore Hill (RH20)
- Wider area
- West Sussex
- Guarantee
- A year, on every job
- Price
- A clear quote up front
- Call
- 0345 464 0079
- Updated
- 26 October 2026
How the visit works
On the day, we start by going over the job with you, so there are no surprises. Surfaces next to the work are protected before we start. Most jobs take anything from a few hours to a full day, depending on how many windows. Somewhere like Codmore Hill needs a little journey planning: let us know about lanes, gates and parking. Everything for the job comes with us, so a second trip is avoided where possible.
- First we agree which joints need doing.
- Old mastic and any loose material are raked out.
- We pack any deep voids first.
- We apply the mastic by hand and shape it.
- The surface is finished to suit the stone or brick.
Getting ready for the visit
- Clear items away from the joints we’re working on
- Tell us about any water getting in
- Where the joints are inside, avoid wetting them before we arrive
Get a quote
Quotes start with a quick conversation. Describe the problem, the location and the size of the job. When it suits you, ring 0345 464 0079 or drop us an email.
Advice
Codmore Hill homes and the weather
Rainfall in the South East is lower than in much of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast. With historic houses such as Old Place Manor (about 1 mile south-west) nearby, there’s older building stock in the area around Codmore Hill as well as newer homes. In older buildings, older timber frames in brick or stone need a different approach from a modern uPVC window.
In the older streets around The Parish Church of St Mary, frames set in older brick or stone need a sealant that suits the wall as well as the frame. Letting a property close to Pulborough station? Then older sash windows in a rental need their mastic kept sound to keep the weather out.
Codmore Hill is about 10 miles south-west of Horsham, in West Sussex. For sand mastic in and around Codmore Hill, please ring 0345 464 0079 or send us an email for a quick quote. We’re based in Crawley and cover West Sussex. Our West Sussex coverage runs to 371 places, and Codmore Hill is one of them. Our Crawley page covers work nearby, about 17 miles away.
Jobs for sand mastic in RH20 is quoted and booked the same way as anywhere else. You’ll find streets such as Masons Way, Hill Farm Lane and Stane Street, and we cover them all. We also cover Broomershill (1 mile south-east), North Heath (1 mile north-east), Nutbourne (1 mile south-east), Marehill (1 mile south-east) and Gay Street (2 miles east). Further out, we also cover Horsham (10 miles north-east), Worthing (11 miles south-east), Bognor Regis (15 miles south-west), Chichester (15 miles south-west), Littlehampton (11 miles south) and Shoreham-by-Sea (14 miles south-east).
What’s near Codmore Hill
Codmore Hill’s nearest station is Pulborough station, about 1.2 miles south-west. Other landmarks nearby include Coates Castle (4.2 miles west). Not far away are The Mens.
Nearby places to Codmore Hill
What else we do in Codmore Hill
When it isn’t the sealant
We’d rather tell you now than do work that will not last, so these are the limits:
- Cracked or broken glass
- Whether work needs listed building consent
- Sash cords, weights and draught-proofing of the sashes
Not sure which it is? You can phone 0345 464 0079 or drop us an email and we will tell you honestly before you book.
What we seal
- Stone surrounds
- Brick reveals
- Sash and case windows
- Timber door frames
- Period & listed homes
- Tenement windows
Why it’s worth doing now in Codmore Hill
Silicone might seem the quicker option, but on period stone or brick it often looks out of place. Sand mastic suits the building and blends with the stone or brick. Around Codmore Hill, older homes often have timber in their floors and frames, where water from a failed joint can cause rot if it’s left.
Leaving a failed joint normally makes the job bigger, not smaller, as water and mould keep getting in. If you are not sure whether it needs doing, call 0345 464 0079 or email us for an honest opinion and a quote.
Why Codmore Hill customers choose us
- An ARBOMaster approved applicator
- Tidy, careful work
- Anti-fungal sanitary silicone in wet areas
- 20+ years of sealant experience
Read how sealant jobs are priced or our reviews.
Do you need sand mastic in Codmore Hill?
Some old mastic was never deep enough. Mastic that’s too thin cracks and drops out so we make sure the new mastic is the right thickness.
If you can see any of these, it’s time to have the joints looked at:
- Mastic worn away on windows facing the weather
- Wind and rain getting in round a sash window
- Modern sealant on a period surround
- Crumbling sand mastic round a window
Managing a site like St Mary's Church of England Primary School? Then larger buildings have plenty of frames, and the mastic around each one ages.
Before booking anyone
- Which colour the sealant will be
- What guarantee comes with the work
- Are they insured?
- How the joint is cleaned and prepared
How the job changes by surface
Tenement and terrace windows
Where a building is shared, window work may involve neighbours, so check who is responsible first.
Sash and case windows
The box of a sash and case window sits in the stone or brick opening. Sand mastic seals the joint round it.
Looking after it afterwards
Looking after new joints is easy:
- Plan mastic work ahead of painting
- Ask the planning authority about consent for listed or conservation-area homes
- Inspect the joints round the windows every year or so
- Leave the new mastic unpainted
Do not touch or press the mastic while it hardens. It skins over quickly, but takes longer to harden fully.
Small cracks are a sign the mastic is ageing. Renewing it then is simpler than waiting until it falls out.
Your questions about sand mastic in Codmore Hill
I let a flat near Pulborough station. Can you help?
Yes, rental work is part of what we do. Just ring 0345 464 0079 or drop us an email and tell us about the property, and we will give you a clear quote.
Is Codmore Hill within the area you cover?
Yes, smaller places are covered as well as towns. We work across London and the South East. Just mention lanes, gates or anything else about the route when you book.
Will the old sealant be removed?
Yes, every time. New sealant will not bond properly to old, so the joint is cleaned back first.
Do you guarantee sand mastic work?
All our work has a one-year guarantee, and we are fully insured.
Should I use sand mastic or silicone?
Sand mastic generally suits period timber windows best. Modern frames normally suit a flexible sealant, and we will explain why.
What do you need from me for a quote?
Just the basics: where it is, what you’ve noticed and how we reach it. Then ring 0345 464 0079 or send us an email.
Do you have insurance?
Yes. We are fully insured, with over 20 years’ experience in sealant work.
Can new sealant go over the old?
No, it won’t last. It can look neat for a few weeks, but the new layer lifts away from the old one. The old sealant has to come out completely.