Fire Stopping in Todd's Green
Fire-rated and intumescent sealing of service penetrations and linear gaps in Todd's Green and across Hertfordshire. CHAS accredited, Constructionline member, with a 12-month guarantee on workmanship.
- Fire seals cut back for extra cables and never reinstated
- Snag lists that include open service penetrations
- Builders’ foam or ordinary silicone in compartment walls
Fire stopping near Todd's Green
Share the site address and what’s failing, and we’ll reply with a fixed quote or arrange a visit.
How we handle fire stopping in Todd's Green
Our applicators are CSCS-carded, and we are CHAS accredited and a Constructionline member. We hold no third-party fire-stopping installer certificate and we’d rather say that up front. We install the specified fire-rated sealant to its tested detail, and our workmanship carries a 12-month guarantee. If you’re dealing with seals disturbed by maintenance and left open and fire sealant pulled out of the opening, we can put it right, whatever the surface. Looking for mastic applicators who cover Todd's Green? Mastic Doctor has worked for contractors, FMs and building owners since 2005.
Smaller places such as Todd's Green still have buildings with fire-resisting walls and floors: schools, halls, care homes and commercial conversions. Any service penetration through those walls should be closed with the specified product, set out as its test evidence shows.
The 12-month guarantee is for workmanship rather than wear and tear. Sealant wears with time, and movement, weather, cleaning and use decide how fast, so we spell out the cover before we begin.
- Where
- Todd's Green (SG1)
- Wider area
- Hertfordshire
- Cover
- 12 months on our workmanship
- Quote
- A fixed quote before we start
- Telephone
- 01277 525 020
- Last updated
- 3 November 2026
What happens if it’s left?
An improvised seal can look finished while offering no tested performance. The fix is to remove it and reinstall to the detail, and doing it once, properly, is cheaper. For buildings around smaller places like Todd's Green, water damage can go unnoticed for longer, especially where a building isn’t used daily, which gives a failed joint time to do damage. Renewing joints in good time avoids the problem.
The price depends on how many linear metres there are, what has to come out first and how the joints are reached. Call for a fixed quote when you are ready.
Why appoint us
- Constructionline member
- Workmanship guaranteed for 12 months
- Fully insured, including public liability cover
- Failed material removed, not covered up
Take a look at what affects the cost or how we’re accredited.
Keeping the joints sound
Regular inspection catches problems early. In particular:
- Keep general-purpose fillers away from compartment walls
- Ask the designer to confirm details early on refits
- Include service cupboards in routine inspections
- Record which product was used where
After every round of M&E works, check that the openings created have been sealed. A short check at the end of each job saves a long hunt later.
A simple record of seal locations and products helps. It tells the next contractor exactly what to reinstate.
Nearby places to Todd's Green
What else we do in Todd's Green
Where services cross fire walls in Todd's Green
Approved Document B is the English guidance that covers fire stopping around openings and penetrations. The national BS 476 classes are due to drop out of it from 2 September 2029, leaving the European BS EN 13501-2 route, subject to transitional arrangements. Either way, we install the specified product to its tested detail. Central London is about 30 miles from Todd's Green. Business park offices in the commuter belt are refitted as tenants change, and each fit-out adds services through compartment walls.
Office fit-outs on sites such as Horizon Technology Park (to the south of Todd's Green) add cabling and pipework through fire-resisting walls, and fire-rated sealant goes in where the specification calls for it. Colleges such as North Hertfordshire College, less than half a mile to the north-west of Todd's Green, add IT and services as courses change, and each new penetration through a fire-resisting wall needs sealing with the specified product. For a building such as Church of St Mary the Virgin, new heating or data runs are the usual reason penetrations need sealing.
Todd's Green is about 2 miles north-west of Stevenage, in Hertfordshire. We send applicators to Todd's Green for service penetrations. Across Hertfordshire, 371 places are covered, including Todd's Green. Sites around London have their own page, about 30 miles away.
Work on service penetrations is covered throughout SG1, whatever the building. Close to Todd's Green, our area also takes in Lower Titmore Green (1 mile west), Titmore Green (1 mile west), Little Wymondley (1 mile north-west), Graveley (1 mile north-east) and Great Wymondley (1 mile north). Nearby towns on our patch include Hemel Hempstead (15 miles south-west), St Albans (13 miles south), Welwyn Garden City (9 miles south), Harpenden (9 miles south-west), Hitchin (3 miles north-west) and Hoddesdon (15 miles south-east).
What’s near Todd's Green
Locally, jobs take us to sites close to Hermit of Redcoats pub and Graveley Primary School and the streets around them. The closest station to Todd's Green is Stevenage station, about 1.7 miles south-east of the centre. Other landmarks nearby include Lister Hospital (0.6 miles east) and Stevenage Museum (1.9 miles south-east). Open spaces near Todd's Green include Purwell Ninesprings.
Our process
Our CSCS-carded applicators arrive with the sealants, primers and backing rod the job calls for. Any old material is cut back to clean, sound faces, the manufacturer’s primer is applied where it’s called for, and the sealant is tooled off neatly. Rural sites near Todd's Green may need directions, gate codes or a contact on site. Send that with the details and we will confirm the plan with the quote.
- We start with your penetration schedule, drawings or specification.
- Access, permits and the order of areas are agreed with the site team.
- We compare every service penetration with its tested detail before sealing.
- Foam, ordinary sealant and debris come out first.
- The specified backing and sealant go in to depth and are finished neatly.
- We tell you about openings that need a different product.
What we need from you
- Flag any permit to work we will need
- Arrange parking or a loading space
- Tell staff and tenants when we’ll be in
Ask for a quote
Tell us about the building, the joints and when you need the work done, and we will put a fixed quote together. The easiest way is to give us a call on 01277 525 020 or send details through our quote form.
Advice
Site staff or a sealant specialist?
Putting right a botched joint often costs more than sealing it well at the start, because the whole bead must be removed and the faces cleaned back again. For that reason, many FMs and contractors use a sealant specialist from the outset.
General builders and handymen seal joints, but it isn’t their main trade. A specialist prepares properly, controls joint depth and picks a product with the right movement class, which is what makes a joint last.
How the quote is worked out
To price the job, we consider:
- Travel to remote or island sites
- The site’s rules and procedures
- The size and state of each joint
- Quantities, in metres or numbers
Every site prices differently: the joint sizes, the specified product, access and working hours each have a bearing. A fixed quote follows once we understand the job.
Before you send an enquiry
A good diagnosis starts with the right details. Let us know:
- Whether an asbestos survey exists
- Photos of the joints, close up and from further back
- What the building is and how it’s used
- Approximate linear metres or a joint schedule
A handful of photographs and a postcode is the fastest way to a quote. Send them through the quote form, or call the office on 01277 525 020 or email us to discuss it first.
Surface by surface
Masonry and concrete
Core-drilled holes are neat; broken-out ones rarely are. The gap is measured at the widest point against the detail’s limits, and any outside it are raised with you.
Linear joints
Head-of-wall gaps, slab edges and wall junctions are linear joints. BS EN 1366-4 testing sets the joint widths, depths, backing and movement a seal covers.
Your questions answered
Can you seal around new services in a hotel near Todd's Green?
Yes, to the specification and the product’s tested detail. Work is done room by room so the hotel keeps trading; design and sign-off stay with the designer and building control.
Do you cover business parks and estates near Todd's Green, such as Horizon Technology Park?
Yes, sites like Horizon Technology Park are within our area, along with the rest of Todd's Green. Photos and a short description are enough for a first look.
Will you come and look before quoting?
Photos, drawings or a schedule are often enough to quote. Where they aren’t, we arrange a site visit before quoting.
Can staff carry on working while you’re here?
In the majority of cases, yes. Phased work can be planned so areas stay in use, with each area protected and signed.
What will the job cost?
Every job gets its own fixed quote. For yours, call the office on 01277 525 020 or email us with a description of the work.
What happens if old sealant might contain asbestos?
Some older mastics, especially in pre-2000 buildings, can contain asbestos. We check the asbestos register before cutting out old sealant in an older building, and work stops until any suspect material has been tested. We don’t remove asbestos-containing materials.
Are your applicators CSCS-carded?
Yes. We use CSCS-carded applicators, which many sites require.