The Mastic Doctor team standing beside their branded vans outside an office building
West Berkshire · England

Facade and window perimeter sealing in Compton, West Berkshire

Facade joint and window perimeter sealing on commercial buildings in Compton and across West Berkshire. CHAS accredited, Constructionline member, with a 12-month guarantee on workmanship.

  • Water coming in around window frames
  • Facade joints cracked through the middle
  • Gaps between rainscreen or cladding panels
1
Send details
Send the specification, photos or a marked-up plan.
2
Get a quote
One fixed quote covering the agreed scope.
3
We seal
CSCS-carded applicators, the right product for each joint.
4
Guaranteed
12-month guarantee on our workmanship.
Covering the South East & Scotland
CHAS & Constructionline
£5m PL insurance

Facade sealing for businesses in Compton

Photos, a specification or a quick description of the joints is enough to start a fixed quote.

Facade sealing in Compton

Most facade joint failures trace back to the joint, not just the sealant. The width has to suit the expected movement and the sealant’s movement capability, while rod fixes the depth and stops the bead sticking to the rear, often at around 2:1 width to depth, as the manufacturer advises. If you have water coming in around window frames and failed sealant on precast panel joints, we can help, whatever the surface. Sealant applicators who only do sealant are a different proposition from a general trade with a gun in the van: in Compton, that means joint design, primers and backing rod as standard.

Conversions of older rural buildings near smaller places such as Compton bring stone, flint, brick and timber up against new glazing. Those joints need a sealant that suits an uneven, sometimes porous surface, and often a colour chosen for the building.

What our 12-month guarantee covers is the way we did the job: preparation, application and finish. Damage, later alterations by others and movement beyond what the joint was designed for sit outside it.

Mastic Doctor team members lined up next to their branded vans outside an office building
Place
Compton (RG20)
Region
West Berkshire
Guarantee
12 months on our workmanship
Quotes
Fixed quote, scope in writing
Call
01277 525 020
Updated
3 November 2026

What sealant work can’t fix

A few problems need another trade or a different fix, and we point that out rather than sealing over them:

  • Water getting in through cracked render or porous masonry
  • Render or concrete edges that have broken away
  • Movement beyond what any sealant can handle

If you are not sure, just call the office on 01277 525 020 or use the quote form and we will give you a straight answer before you book.

What we seal

  • Window and door perimeters
  • Perimeter joints where frames meet the structure
  • Shopfront frames
  • Stone and brick facade joints
  • Coping and flashing joints
  • Cladding panel joints

When to call us in Compton

A frequent fault is a bead stuck to the joint’s rear face as well as its sides. With no backing, the sealant is restrained.

Most enquiries start with something like this:

  • Previous reseals run over old sealant
  • Perimeter sealant that has split or peeled away
  • Cladding panel joints that have opened up
  • Air leaks through failed facade joints

When a school such as Compton C.E. Primary School is extended or refurbished, the mastic package is often squeezed into the holidays.

What your quote should include

  • Their pre-qualification and accreditations
  • How the existing material will be dealt with
  • Will RAMS and insurance details be available?
  • Whether their applicators hold CSCS cards

How to choose a sealant contractor

Mastic packages on Compton sites

Compton is about 50 miles from central London. Commuter-belt towns tend to see a steady flow of new flats, offices and commercial schemes, so mastic packages have to keep pace with busy programmes. The South East is one of the drier parts of the UK. Even so, frost and condensation on steel and glass are common on winter mornings, so we time external mastic for dry faces and agree it with the site team.

For contractors building in or near Compton, we seal to the drawings, the specification and the programme.

Compton is about 7 miles south of Didcot, in West Berkshire. Anywhere in RG20, it works the same way: details in, fixed quote out, then sealing and a 12-month guarantee. 140 places across West Berkshire fall within our area, including Compton. Reading is covered too, around 13 miles from Compton.

Anyone looking for facade sealing in RG20 gets the same process as the rest of our area: send details, get a quote, we seal, guaranteed. Among the streets we cover are High Street, Lowbury Gardens and Cheap Street, and sites on any of them can send details for a fixed quote. Just outside Compton, we also work in East Ilsley (2 miles north-west), Aldworth (2 miles east), Woodway (3 miles north), Blewbury (4 miles north) and Chilton (4 miles north-west). Nearby towns on our patch include Newbury (9 miles south), Thatcham (8 miles south), Burghfield Common (11 miles south-east), Speenhamland (8 miles south-west), Hungerford (14 miles south-west) and Fords Farm (11 miles south-east).

What’s near Compton

Locally, jobs take us to sites close to The Downs School and The Swan pub. A little further out are Hampstead Norris Castle (2.5 miles south). The countryside around Compton includes Churn Hill.

Map of Compton © OpenStreetMap contributors

Keeping the joints sound

To get the most from the new sealant:

  • Check that rainwater leaves the facade the way it was designed to
  • Plan facade sealing alongside redecoration
  • Record the product and colour used on each elevation
  • Brief window cleaners about newly sealed joints

Blocked sills and gutters push water at the joints. Sealant copes better when water runs off the facade as designed rather than sitting against the joints.

Planned resealing is cheaper than reacting to leaks. Inspect regularly and reseal sections as they start to fail, rather than waiting for a ceiling stain.

General trades versus a specialist

The visible bead is only part of the job. Backing rod, primer where specified and a joint designed to move with the building are where general trades tend to cut corners.

Redoing a failed joint normally costs more than getting it right at the outset, since all of it has to come out and the faces be cleaned back again. That’s why many clients bring in a specialist from the beginning.

Questions we are asked in Compton

What site paperwork comes with a job in Compton?

We will confirm the paperwork you need, such as RAMS, our insurance certificate and CSCS details, with the quote. We are CHAS accredited and a Constructionline member, with £5m public liability insurance and CSCS-carded applicators.

Can you keep pace with our programme in Compton?

Yes. Send the programme and drawings, and we’ll plan the mastic to suit the stages. We’re CHAS accredited and a Constructionline member, and paperwork such as RAMS is confirmed with the quote.

Can you find out why a window is leaking?

Yes. We look at the perimeter sealant and tell you whether it has failed. Where the cause seems to be elsewhere, we’d rather tell you than reseal pointlessly.

Do you provide access for facade work?

That comes down to the access arranged for the job. Share what access exists or is planned when you send details, and we’ll plan the work with you.

How much does the work cost?

That depends on the job: quantities, access, the product and any phasing. Call for a fixed quote and we will price it properly.

Do you run new sealant over the existing bead?

No. New sealant won’t hold on old sealant, so the old bead is cut away. That is what makes the new joint last.

Do you install glazing systems?

No. We don’t install glazing systems, windows or glass. We seal the joints around them, such as perimeter joints where frames meet the structure.

From enquiry to sign-off

The first thing on site is a walk round with your contact, agreeing which joints are in scope, where to start and what must stay open. After that, any old or failed material is removed, each joint is prepared and the new sealant goes in. Smaller jobs around Compton can be grouped with others nearby. A fixed quote is given before anything starts.

  1. Photos, drawings or a visit tell us about the joints and the access.
  2. Product choice follows the joint’s movement and substrate.
  3. The existing bead comes out in full and the joint faces cleaned.
  4. Primer is applied where the maker specifies it.
  5. Backing rod is fitted and the new sealant gunned in and tooled.
  6. We go over the completed work with you before leaving.

Preparing the site

  • For older buildings, check the asbestos register before work
  • Share your working hours and any access restrictions
  • Let building users know which areas are affected

Ask for a quote

Quotes are fixed against the scope you send, so the cost is agreed before work starts. To ask for one, call 01277 525 020 or email us.

Ask for a quote

Related advice

What the job involves on each surface

Render and coated surfaces

Paintable sealants exist for joints that will be coated. The choice depends on the specification and finish.

Window and door perimeters

Perimeter joints move as frames expand and contract in the sun. Rod placed at the right depth lets the bead stretch without tearing.

Accreditations

Trusted. Accredited. Insured.