Facade Sealing contractors in Sarratt
Planning work on a facade joint in Sarratt? We look at it, seal it with the right product and hand it over with a 12-month guarantee.
- Failed sealant on precast panel joints
- Perimeter joints where frames meet the structure
- Cold air coming in at window perimeters
Facade sealing for Sarratt sites
Photos, a specification or a quick description of the joints is enough to start a fixed quote.
Facade sealing in Sarratt
A good facade joint depends on design as much as product. 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 with the ratio the sealant maker recommends, often around 2:1. If you have failed seals around shopfront and entrance frames and water coming in around window frames, we can put it right, whatever the surface. A single leaking joint is often how a building in Sarratt first comes to us: we look at the rest while we are there and tell you what we find.
For a site near Sarratt, the mastic visit is planned so the right sealants, primers and backing rod are on hand. Drawings, photos and the programme let us give a fixed quote.
Work we carry out comes with a 12-month guarantee. Should something we installed fail, call the office on 01277 525 020 or send photos by email and we will come back to it.
- Where
- Sarratt (WD3)
- Region
- Hertfordshire
- Guarantee
- 12 months on every job
- Quotes
- Fixed quote, scope in writing
- Telephone
- 01277 525 020
- Updated
- 3 November 2026
Honest limits
Honesty saves time and money. New sealant won’t cure:
- Leaks from roofs, gutters or failed flashings rather than sealant joints
- Arranging specialist high-level access, which is planned with the client
- Movement beyond what any sealant can handle
If you are not sure, just ring 01277 525 020 or use the quote form and we’ll give you a straight answer before you book.
Joints and surfaces we work on
- Stone and brick facade joints
- Perimeter joints where frames meet the structure
- Coping and flashing joints
- Shopfront frames
- Window and door perimeters
- Cladding panel joints
How a job runs
We schedule the visit to fit the site hours and access windows you give us. On the day, the work area is kept contained and tidy, and your contact hears from us before we move to the next area. Jobs in and around smaller places like Sarratt are normally planned as a single visit, so photographs and measurements up front really help. Then the right materials arrive with us.
- Access, site rules and timing are settled with the client up front.
- We only seal when joints are dry and within the product’s temperature range.
- We remove the old bead and check the edges are sound.
- Joints are cleaned, primed if required and fitted with backing rod.
- Sealant is gunned in and tooled hard onto both faces.
- Once signed off, the work carries our 12-month guarantee.
Preparing the site
- Make sure the joints can be reached
- Share your working hours and any access restrictions
- Send any specification or drawings in advance
Getting a fixed quote
If there’s a specification, drawings or a tender package, send it with your enquiry, and we’ll price against exactly what is specified. Smaller jobs need nothing more than photos and a few notes.
Read more
When to call us in Sarratt
New sealant run over old sealant rarely holds. Cured silicone won’t accept a new silicone bead.
Common reasons buildings call us in:
- Cold air coming in at window perimeters
- Hard, chalky sealant that no longer flexes
- Water coming in around window frames
- Gaps between rainscreen or cladding panels
New wings at hospitals like Leavesden Hospital (to the east of Sarratt) bring long runs of window and panel joints to seal.
What to look for in a quote
- Proof of insurance
- How they handle RAMS and site documents
- Their plan for phasing and protecting the area
- How long is the guarantee, and what does it include?
Questions about Sarratt
Is a hospital such as Leavesden Hospital somewhere you can work?
Yes. We work in healthcare settings as well as offices and schools. Each area is agreed with the ward or department and the estates team in advance.
Can you keep pace with our programme in Sarratt?
Yes. The mastic is planned around your key stages. We are CHAS accredited and a Constructionline member, and paperwork such as RAMS is confirmed with the quote.
Are you CHAS accredited?
Yes. We’re CHAS accredited and a Constructionline member.
Will your applicators have CSCS cards?
Yes. Our applicators hold CSCS cards, which many sites require.
Is your workmanship covered by a guarantee?
Yes. The 12-month guarantee covers our preparation and application, though not damage or work by other trades.
Do you replace windows or glass?
No. Glazing, windows and glass replacement aren’t part of our work. We seal the joints around them, such as perimeter joints where frames meet the structure.
How long will the new sealant last?
Nobody can honestly give a figure in years, since movement, weather, cleaning and use all affect it. Regular checks let you plan resealing before leaks or damage.
What sets the cost
To price the job, we consider:
- Whether the work must be split into stages
- Removal of failed or old sealant
- The site’s rules and procedures
- The size and state of each joint
The price depends on the quantity of joints, what has to come out first and the access. Call for a fixed quote when you are ready.
Details that help us quote
A good diagnosis starts with the right details. Let us know:
- Whether an asbestos survey exists
- Specification clauses that apply
- Anything awkward about access or site hours
- Approximate linear metres or a joint schedule
A good quote starts with a clear picture: the joints involved, quantities, access and the product called for. Send what you have, and we will arrange a site visit if anything is unclear.
Why act early in Sarratt
Resealing a few window perimeters is a small job; repairing water-damaged interiors and fixings is not. Water through a failed joint rarely stays where it starts. Converted and older buildings near places like Sarratt tend to move, and aged sealant cracks. A sealant with the right movement capability, correctly sized, lasts far better.
There’s no price list, because the scope varies so much from one building to the next. For a fixed figure, call for a quote.
Why choose Mastic Doctor in Sarratt
- Our applicators hold CSCS cards
- Matching to RAL references, product permitting
- One contact handling all your sites
- Constructionline member for supplier checks
Take a look at how commercial sealant jobs are priced and how we’re accredited.
Doing it in-house
Site maintenance staff can often handle a short internal joint. Where it goes wrong is preparation: sealing over old material, sealing onto damp or dusty surfaces, or a product that can’t take the movement.
What you see is the finished bead, but most of the work is hidden. Backing rod, primer where specified and a joint designed to move with the building are easy to get wrong without experience.
Places near Sarratt
More services for Sarratt
Facade sealing around Sarratt: what changes locally
Rainfall across the South East, Sarratt included, is lower than in many parts of the UK. Still, external mastic needs dry faces within the maker’s temperature limits, which isn’t every day, so external mastic is timed for workable conditions and agreed with the site manager. Central London is about 21 miles from Sarratt. Towns within reach of London tend to keep building, from flats to offices and schools, which keeps mastic packages in demand.
When a school such as Sarratt Church of England Primary School is extended or refurbished, the mastic package is often squeezed into the holidays. Older buildings in the area around Sarratt, such as Chenies Manor House, which lies west of Sarratt, need care when sealed: the product has to suit soft or historic materials.
Sarratt is about 3 miles north of Rickmansworth, in Hertfordshire. We cover commercial sites throughout Sarratt. Sarratt is one of 371 places we cover in Hertfordshire. For work in that direction, see our London page.
We cover the WD3 postcode districts for facade joints. Buildings on Alexandra Road, Downer Drive and The Briars are within our area. If your building is just outside Sarratt, we cover Micklefield Green (1 mile south-east), Bucks Hill (1 mile north-east), Chandler's Cross (2 miles south-east), Loudwater (2 miles south) and Chorleywood West (2 miles south). Further afield, our area takes in Watford (4 miles east), Hemel Hempstead (5 miles north), St Albans (8 miles north-east), Welwyn Garden City (15 miles north-east), Harpenden (11 miles north-east) and Hatfield (12 miles north-east).
Local landmarks in Sarratt
In Sarratt, that means premises near The Boot Public House and St Clement Danes School, among other places. The nearest railway station is Chorleywood station, roughly 2.3 miles south-west of the centre. Well-known places in the area include Chiltern Open Air Museum (3.8 miles south-west) and Leavesden Hospital (4 miles east). For a walk, there’s Sarratt Bottom nature reserve and Tumbling Bay.