Wokingham · England
The Holt External Mastic
Sealing brickwork movement joints, render, cladding and façade joints for The Holt, backed by a 12-month guarantee. Ask us for a quote.
- Failed sealant between panels on a façade
- Weeds or debris growing in open joints
- Failed seals between different materials
Looking after it afterwards
Aftercare is simple:
- Have failed joints looked at early
- Check external joints each spring
- Tell anyone working on the walls about the movement joints
- Keep soil, plants and ivy away from the joints
Avoid pressure-washing straight into the joints. High-pressure water can lift the edges over time.
Gaps, plants or missing sealant in a joint are worth getting looked at. Earlier resealing means a smaller job and a better result.
External mastic for homes and businesses in The Holt
Joints in render and cladding are easy to overlook until a damp patch appears. We look over the joints, agree the ones to renew and reseal with a flexible, weatherproof product in a matching colour. We work on concrete & block, façade panels and render & cladding joints, and people most often call us about gaps where render, brick and frames meet and sealant that has lost its bond to the brick or render.
Somewhere as small as The Holt, homes and farm buildings often face open ground, so walls and rooflines take the full force of wind and rain. Joints on those walls need a sealant that moves with the building and stays in place.
The work is guaranteed for twelve months. If something is not right with it in that time, tell us and we will put it right.
- Location
- The Holt (RG10)
- Wider area
- Wokingham
- Cover
- One year on every job
- Price
- A clear quote up front
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
Quotes for external mastic in The Holt
The price is agreed before any work begins. It takes into account:
- Working hours on commercial sites
- The number and length of the joints
- Whether the work is at height
- The number of rooms or windows
Leaving a failed joint usually makes the job bigger, not smaller, as water and mould keep getting in. If you are unsure, phone 0345 464 0079 or drop us an email and we’ll give you an honest view and a quote.
What to tell us for a quote
When you call or email, it’s useful to know:
- Photos by email, if that is easy
- Where the job is, and your postcode
- How many joints, rooms or windows are involved
- Whether it has been sealed before
Want a quote for external mastic? Please ring 0345 464 0079 or send us an email and tell us about the job. We’ll explain what we’d do and give you a clear quote before work begins.
Landlord and commercial work in The Holt
We regularly work with letting and managing agents. Tell us the address, the job and how access works and we will give you a quote.
If you manage several properties in or around The Holt, several properties can be quoted together. Send us the addresses and the work at each, and photos by email help.
Should I try it myself first?
The biggest DIY mistake is sealing over old sealant. Silicone does not stick to old silicone, so it peels away and traps moisture behind it. All the old material has to come out first.
A DIY attempt doesn’t rule out a professional job. We remove it and do the joint properly.
What we are called out for in The Holt
Poor preparation causes many early failures: dusty or wet faces, no primer where one was needed, or old sealant left in. The sealant never bonds properly.
Any of these means the joints need attention:
- Panel joints letting water in
- Failed seals between different materials
- Weathered mastic that no longer stretches
- Brick movement joints where the sealant has split
Historic houses such as Harleyford Manor, about 3.9 miles north, show how far back building around The Holt goes.
Before you book anyone
- How long the guarantee is
- How much experience the applicator has
- Which sealant they’ll use, and why
- What the cure time is
When something else is needed
Before booking, it’s worth knowing the limits too:
- Movement that is more than a sealant joint can take
- Cracked brickwork or render that needs a builder or plasterer
- Damp from another source, such as a leaking gutter or a bridged damp-proof course
If in doubt, call 0345 464 0079 or drop us an email and we will say what we think before booking.
What we seal
- Render & cladding joints
- Concrete & block
- Joints between brick and frames
- Brickwork movement joints
- Façade panels
- Copings & trims
FAQs for The Holt
Can you do external mastic in The Holt?
Yes. We work across London and the South East, and The Holt is part of that. You can ring 0345 464 0079 or send us an email and tell us what needs doing.
Do you cover smaller places like The Holt?
Yes. The Holt is within the area we cover, which takes in towns, villages and rural addresses. We work across London and the South East. Just mention lanes, gates or anything else about the route when you book.
Do you hold any approvals?
Yes. We are an ARBOMaster approved applicator, which is run for the Arbo sealant brand.
How long should I leave it?
Many sealants skin over quickly but take longer to cure fully. We will give you the cure time for the product we used.
Can I add another job to the visit?
Yes, we can. More than one area can be quoted together.
Will you leave a mess?
No. We protect the surfaces around the joints, and we tidy up before we go.
Do you seal joints where cladding meets other materials?
Yes. Materials like render, brick, metal and uPVC all move differently, so the joint between them must be flexible. We choose one that suits both surfaces.
How long does the job take?
Typically it takes anything from a few hours to several days, depending on the building. Bigger jobs take longer.
What external mastic looks like in The Holt
Historic houses like Harleyford Manor (about 3.9 miles north) are a reminder that the area around The Holt has older buildings as well as new. Where a home is older, older walls and rooflines need a sealant that moves with them and suits the material. 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.
Schools such as Robert Piggott CofE Infant School are buildings too, and movement joints, cladding joints and gutters on larger buildings need the same care as a house’s. Letting a property close to Wargrave station? Then failed wall and movement joints let damp in, so they’re worth checking between tenancies.
The Holt is about 4 miles north-east of Woodley, in Wokingham. If you need external mastic in The Holt, please ring 0345 464 0079 or drop us an email for a quick quote. We are based in Crawley and cover Wokingham, The Holt included. Our Wokingham coverage runs to 35 places, and The Holt is one of them. Our Reading page covers work nearby.
Here we cover the RG10 postcode area for external mastic. You’ll find streets such as Blakes Lane and Bath Road, and we cover them all. Neighbouring places we cover for external mastic include Kiln Green (1 mile east), Hare Hatch (1 mile south-west), Ruscombe (2 miles south-west), Waltham St Lawrence (2 miles south-east) and Twyford (2 miles south-west). Within a short drive, we also cover Reading (7 miles south-west), Wokingham (6 miles south), Woodley (4 miles south-west), Earley (6 miles south-west), Crowthorne (9 miles south) and Lower Earley (6 miles south-west).
Around The Holt
Around The Holt, our work takes us to homes and buildings near Blessed Hugh Faringdon Catholic School and The Queen Victoria pub, among other places. The nearest railway station is Wargrave station, roughly 1.7 miles west of the centre. Well-known places in the area include Frazer Nash Archives (3.2 miles north-west) and St Mark's Hospital (4.4 miles north-east). For a walk, there’s Weycock Hill and Hurley Chalk Pit.
How it works
Every visit runs the same way: we look at the joints together, protect the area around them, do the work and clear up. Most jobs take a few hours to a few days, depending on the length of joint and the access. Somewhere as small as The Holt, access is often the only tricky part. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- First, the joints are inspected and the access agreed.
- We cut out the old mastic and rake out anything in the joint.
- Joint faces are cleaned back and primed if the sealant needs it.
- Backing rod sized to the joint goes in to set the depth.
- The exterior sealant is applied, tooled and checked along its length.
Preparing for the visit
- Keep children and pets away from the work area
- Let us know about earlier repairs to the joints
- Mention any sign-in or site rules at work premises
How to get a quote
There’s no standard price list. Instead, your job gets its own clear quote. To arrange one, ring 0345 464 0079 or drop us an email.