West Berkshire · England
Great Lea Common External Mastic
Problem with your movement joints in Great Lea Common? We remove the old material, prepare the joints and seal them properly, and the work is guaranteed for a year.
- Sealant pulling away from one side of the joint
- Movement joints filled with mortar instead of sealant
- Cracked joints where brick meets render or frames
External mastic in Great Lea Common
We are ARBOMaster approved applicators, and each external joint gets a sealant suited to it. Some surfaces need a primer before sealing. If you are dealing with leaking joints around cladding and façade panels and cracked joints where brick meets render or frames, we can put it right.
External sealant needs dry, clean surfaces, so work around Great Lea Common is planned for dry weather. Let us know about access to every wall, plus any garages or outbuildings.
There’s a 12-month guarantee on every job, large or small.
- Place
- Great Lea Common (RG7)
- Wider area
- West Berkshire
- Cover
- 12 months on all our work
- Quotes
- A clear quote up front
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
Should I try it myself first?
The biggest DIY mistake is sealing over old sealant. New silicone won’t bond to old, so it lifts and traps water and mould underneath. All the old material has to come out first.
Overfilling a joint is a classic DIY mistake. A heavy bead looks messy and copes badly with movement, and the joint depth matters as much as the finish.
Your questions about external mastic in Great Lea Common
Can you do external mastic in Great Lea Common?
Yes. Our work covers London and the South East, and Great Lea Common is part of that. You can ring 0345 464 0079 or email us and let us know what needs doing.
Can you help a landlord with a rental near Reading Green Park station?
Yes, rental work is part of what we do. Just call 0345 464 0079 or email us and tell us about the property, and we’ll give you a clear quote.
What do you put in the joint?
Quality sealants from brands including Arbo and Everbuild, chosen to suit the joint. We explain the product when we quote.
Do the sealants smell?
It depends on the product. Some products have a noticeable smell, others very little, and any smell fades as they cure.
Can I add another job to the visit?
Yes. Tell us about everything you’d like done.
Can you seal over the old sealant?
No. Fresh sealant doesn’t stick to old sealant, and it traps any mould or water underneath. It all has to come out first.
What do you need from me for a quote?
Just the basics: where it is, what you’ve noticed and how we reach it. After that, simply call 0345 464 0079 or email us.
Will the old sealant be removed?
Always. Sealing over old sealant is the main reason resealing fails early, and it’s something we never do.
For landlords and businesses
Businesses can book us for washrooms, kitchens, offices and more. For commercial premises, we can talk through working times when we quote.
We also work for property managers and facilities teams. Several sites can be quoted together, and we are fully insured.
How the visit works
All our tools and materials come with us in the van. After a quick look at the joints together, the area is protected and the work begins. It normally takes anything from a few hours to several days, depending on the building. In a small place like Great Lea Common, access is normally the main thing to plan. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- We look at every joint and agree a colour to suit the wall.
- We take out the old sealant until the faces are sound.
- Closed-cell backing rod is pushed in so the sealant bonds to two sides only.
- Primer is applied wherever the sealant needs it.
- We gun in low-modulus sealant and tool it neatly.
Preparing for the visit
- Keep children and pets away from the work area
- For business premises, tell us about site rules or sign-in
- Let us know about parking restrictions
Getting a quote
Getting a quote is simple: let us know the job and the location. A few pictures by email make the job easier to understand.
Advice
Places near Great Lea Common
More services for Great Lea Common
How the job changes by surface
Joints between dissimilar materials
Joints where frames, sills or panels meet the wall are common leak points. The old joint is removed and a sealant that bonds to both sides goes in.
Render joints
Rendered walls have joints at beads, openings and changes of material. We reseal them with a flexible exterior sealant that suits the render colour.
What external mastic looks like in Great Lea Common
Rainfall in the South East is lower than in much of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind. With historic houses such as Stratfield Saye House (about 4.3 miles south) nearby, there’s older building stock in the area around Great Lea Common as well as newer homes. Where a home is older, older walls and rooflines need a sealant that moves with them and suits the material.
For an older house near a landmark such as St Paul's Church, older walls, gutters and the joints where extensions meet them need a flexible sealant.
Great Lea Common is about 3 miles south of Reading, in West Berkshire. If you need external mastic in Great Lea Common, please phone 0345 464 0079 or email us for a quick quote. We cover West Berkshire from our Crawley base, Great Lea Common included. Across West Berkshire, we cover 155 places, and Great Lea Common is one of them.
Our applicators cover all of the RG7 postcode area for external mastic. We also cover Three Mile Cross (1 mile south-east), Whitley Wood (1 mile north-east), Ryeish Green (1 mile south-east), Green Park (1 mile north-west) and Shinfield (1 mile east). We also work in nearby towns such as Newbury (15 miles west), Thatcham (12 miles west), Burghfield Common (4 miles west), Speenhamland (15 miles west), Calcot (4 miles north-west) and Shaw (14 miles west).
Near you in Great Lea Common
Locally, jobs take us to homes and businesses close to Geoffrey Field Junior School, Ryeish Green School and Pearman's Copse, among other places. Great Lea Common’s nearest station is Reading Green Park station, about 1.5 miles north-west. Well-known places in the area include Berkshire Medical Heritage Centre Museum (3 miles north) and Royal Berkshire Hospital (2.9 miles north). Green spaces nearby include Fobney Island Wetland Reserve and Longwater.
What we cannot put right
We’d rather tell you now than do work that will not last, so here’s what sealant can’t put right:
- Cracking across the wall rather than at a joint
- Loose or hollow render, which needs re-rendering
- Subsidence or other structural problems
Not sure which it is? You can ring 0345 464 0079 or email us and we’ll tell you honestly.
Where we work in Great Lea Common
- Brickwork movement joints
- Render & cladding joints
- Copings & trims
- Concrete & block
- Joints between brick and frames
- Façade panels
What we’re called out for in Great Lea Common
Weeds, moss and debris in a joint are a sign the sealant has gone. Dirt and roots then trap moisture in the joint.
Common reasons people contact us are:
- Hard, crazed mastic that has stopped moving
- Brick movement joints where the sealant has split
- Leaking joints around cladding and façade panels
- Joints pointed up with cement by mistake
Rented homes near Reading Green Park station change hands often, and failed wall and movement joints let damp in, so they’re worth checking between tenancies.
Comparing quotes
- Whether all the old sealant comes out first
- How long to leave it before use
- How the joint is cleaned and prepared
- What the quote includes, VAT included or not
Keeping the joints in good condition
Simple care keeps the joints in good condition. Our advice:
- Avoid pressure-washing directly into sealant joints
- Point out the joints to other trades
- Keep movement joints as flexible joints, not mortar
- Look over the joints every year, ideally after winter
Follow the cure time we give you before the joint is knocked or disturbed. The surface skins over quickly, but full cure takes longer.
Small splits are the time to act. Then it’s a straightforward cut-out and reseal.