Fire-rated sealing and fire stopping in Steep Marsh, Hampshire
Fire-rated and intumescent sealing of service penetrations and linear gaps in Steep Marsh. CHAS accredited, Constructionline member, with a 12-month guarantee on workmanship.
- Fire-stopping items raised at inspection or handover
- Fire stopping installed outside its tested range
- Service penetrations left open after M&E works
Fire stopping in Steep Marsh
Share the site address and what’s failing, and we’ll reply with a fixed quote or arrange a visit.
Fire stopping for commercial buildings in Steep Marsh
We are commercial sealant applicators, CHAS accredited and a Constructionline member, with CSCS-carded applicators on site. We hold no third-party fire-stopping installer certificate, and we won’t pretend otherwise. We install the specified fire-rated sealant to its tested detail, and our workmanship carries a 12-month guarantee. We work on small duct penetrations where the tested detail allows, pipe penetrations and linear gaps at wall heads, and what we are called in for most is seals that don’t match their tested detail and penetration schedules that need working through. Facilities teams, main contractors and managing agents in Steep Marsh tend to want the same three things: a clear scope, tidy work and joints that don’t fail again.
For a smaller site near Steep Marsh, we plan to do all the penetrations in one go, with the specification and photographs sent in advance. Design and sign-off belong to the designer or building control; we install what’s specified.
Work we carry out comes with a 12-month guarantee. If an installation problem shows up, call the office on 01277 525 020 or email a schedule or drawings and we will arrange a return visit.
- Place
- Steep Marsh (GU32)
- Region
- Hampshire
- Cover
- 12 months on every job
- Quote
- A fixed quote before we start
- Call
- 01277 525 020
- Updated
- 3 November 2026
Common problems we fix in Steep Marsh
A common fault is a product that was never fire-rated in the first place: expanding foam or a general-purpose sealant pushed into a gap to tidy it. The opening looks sealed but has no fire test evidence behind it, so it has to come out.
Look out for the following:
- Openings left by services added after handover
- Fire sealant pulled out of the opening
- Open linear gaps along the top of fire-resisting walls
- Builders’ foam or ordinary silicone in compartment walls
For a unit at a site such as Upper Adhurst Industrial Park, 1.8 miles to the east of Steep Marsh, new power or data runs between office and warehouse can breach a compartment wall.
What to look for in a quote
- The terms of the workmanship guarantee
- Which product they’ll use, and why it suits the joint
- Are they CHAS accredited or on Constructionline?
- What level of public liability insurance do they hold?
After the work
After handover, a little attention goes a long way:
- Get seals inspected before ceilings and boxing close
- Agree the fire-stopping specification before services go in
- Put resealing into every M&E and fit-out package
- Check risers and ceiling voids after each round of works
After the work, brief anyone else working in the area that the openings are now sealed. Any seal cut back for a new service needs reinstating to its tested detail using the same product.
Make reporting new openings part of every permit to work in service areas. It costs little and catches breaches early.
Compartment walls and floors in Steep Marsh
Steep Marsh has a number of hotels close by, all within 2 miles. A hotel refit often runs new services through compartment walls between bedrooms and corridors, and each opening needs the specified seal. In England, Approved Document B covers fire stopping of 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. Our part stays the same: the specified product, installed to its tested detail.
At a healthcare site like Petersfield Hospital, which lies south of Steep Marsh, new services through compartment walls are a constant, and each needs the specified seal. For a building such as Church of All Saints, new heating or data runs are the usual reason penetrations need sealing.
Steep Marsh is about 2 miles north of Petersfield, in Hampshire. Businesses, contractors and managing agents in Steep Marsh can call on us for service penetrations, as part of our coverage of Hampshire. Steep Marsh is one of 723 places in Hampshire on our list. Sites around Portsmouth have their own page, about 17 miles away.
Anyone looking for fire stopping in GU32 gets the same process as the rest of our area: send details, get a quote, we seal, guaranteed. Close to Steep Marsh, our area also takes in Steep (1 mile south), Oakshott (1 mile north), Sheet (1 mile south-east), Petersfield (2 miles south) and Hawkley (2 miles north). Nearby towns on our patch include Havant (12 miles south), Horndean (9 miles south), Alton (8 miles north), Waterlooville (11 miles south), Purbrook (12 miles south) and Bordon (7 miles north-east).
Local landmarks in Steep Marsh
Locally, jobs take us to sites close to The Cricketers Inn and The Petersfield School. For rail, the closest station is Petersfield station, roughly 1.7 miles south. Other landmarks nearby include Bear Museum (2 miles south) and Petersfield Community Hospital (1.8 miles south). Open spaces near Steep Marsh include Wheatham Hill and Liss Riverside Railway Walk South.
Leave it or put it right?
Open penetrations multiply: each new service adds to the list. A schedule that is dealt with regularly stays manageable, rather than turning into a full building survey and reseal. For buildings around smaller places like Steep Marsh, 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 product called for affects the cost, as does the preparation each joint needs. Access, phasing and site requirements come into it too.
Why choose Mastic Doctor in Steep Marsh
- Fully insured, including public liability cover
- Joints cleaned back to sound surfaces
- CHAS accredited contractor
- One phone line for London, the South East and Scotland
See what affects the cost and our accreditations.
Also near Steep Marsh
What else we do in Steep Marsh
From enquiry to sign-off
At the end of each section, the masking comes off, the area is cleaned and every joint is checked with your site contact. Where the sealant needs time to cure before use, we tell you and sign the area. For work around Steep Marsh, we aim to finish in one visit, so we ask for photographs and rough sizes first. Then the right materials arrive with us.
- First we confirm the product and tested details named in the specification.
- Openings are measured and grouped by detail.
- Improvised fillers and failed sealant are removed.
- Where the detail needs backing, it goes in at the stated depth.
- We gun the sealant in to the specified depth around each service and tool it.
- We walk the completed areas with you and confirm the records agreed at quote stage.
Preparing the site
- Have the specification and drawings to hand
- Warn occupants and staff about the work
- Clear stock, furniture or equipment away from the joints
Ask for a quote
The quickest route to a quote is a few photographs and the site postcode. Send them through the quote form, or give us a call on 01277 525 020 or use the quote form to discuss it first.
Related advice
Owners, agents and contractors
If you look after buildings for someone else, clear figures and clear communication matter. We quote a fixed sum, confirm the scope and walk the finished work with you or your representative.
Planned maintenance programmes are welcome: resealing failed joints building by building, on a schedule that suits your budget. Sites in Steep Marsh can sit alongside others in a wider programme across Hampshire.
What the job involves on each surface
Drylining partitions
Plasterboard partitions are tested as a specific construction. The sealant detail has to be tested in that wall type, with the stated board layers.
Linear joints
Joints at the top of partitions may need to move as the slab above deflects. The specified product and backing for that movement are what goes in, with no gaps along the run.
Your questions answered
How does the move away from BS 476 affect penetration seals in Steep Marsh?
References to BS 476 classes are being removed from Approved Document B from 2 September 2029, after which BS EN 13501-2 classification is the route, subject to transitional arrangements. Our part doesn’t change: the specified product, to its tested detail.
Would you work within a site like Petersfield Hospital?
Yes. Healthcare sites are among the places we work. The estates team’s permit system and infection-control rules come first, and the work is planned around them.
Will you just go over the old sealant?
No. Sealing over old material is one of the classic causes of early joint failure, so everything comes out first.
How long do sealant joints last?
Nobody can honestly give a figure in years, since movement, weather, cleaning and use all affect it. Regular inspection is the best way to catch problems early.
How do I request a quote?
The quote form is the simplest route, though you can also speak to us on 01277 525 020 or email the details over. Include photos or drawings if you have them.
Do you offer coloured sealant?
In many cases, yes. Many products come in a range of standard colours, and matching to RAL references or surrounding finishes is often possible. We will confirm the colours available for the specified product.
Does weather matter for sealant work?
Outside, yes. The joint has to be dry and within the product’s temperature range, so frost, rain or cold mornings can delay outside work. Inside work is seldom held up.