CAVITY TRAYS LTD

ADMINISTRATION CENTRE
BOUNDARY AVE
LUFTON TRADING ESTATE
YEOVIL
SOMERSET BA22 8HU

Tel: 01935 474769
Fax: 01935 428223

Company Logo

Suppliers of: cavity wall trays abutment cavity wall trays preformed damp courses cavity wall closers abutment cavity wall closers air bricks roof ventilation soffit ventilation fascia ventilation roof

Cavity Trays Ltd -Manufacturers of Cavity trays, DPCs, Radon Protection, Roof ventilation products &  Cavity closers.

The only cavity tray manufacturer awarded European Technical Approval (ETA).

 

Useful Resources:

Main Product Ranges:

Damp Proofing Products:

A wide selection of Cavity Trays, profiled DPCs and ancilliary products for all construction methods. Cavity trays can be supplied in all sizes and shapes from load bearing lintels to masonry support systems. Damp proofing Courses (DPCs) are available in preformed & profiled systems to provide excellent Damp Proofing Solutions. Other products include weep vents, flashings, remedial products and arresting barriers for all damp proofing problems.

Radon Products:

Cavity trays can also supply an extensive range of Membranes for all applications. These include: * Contaminated Land Gas Reception Sump * Gas and Water Outlets and Service Entry Points * Methane Barriers * Radon (Cavity) Barriers * Service Pipe Entry Seals (top hats) * Type N Sitesealer Membrane

Ventilation Products:

Cavity Trays supply a wide range of products to solve ventilation problems on all contruction projects. Products include: Air bricks, sleeves, Ventilators, Roof vents, roofline Ventilation for Soffits, eaves and Fascias.

Associated Products:

Cavity Trays offer a wide range of associated products to include: Masonry Attachment Profiles, Loft access doors & hatches, Eaves Protection, Bonding strips and valley gutters.

Cavity Closer Ranges:

Cavity Trays supply a wide range of Cavity Closers for all construction & refurbishment methods. Products include: Bespoke Traditional Cavity Closers, Fire integrity stops & barriers, Acoustic barriers, waterproof barriers, insulated cavity closers & barriers.

Main Product categories:

Threshold cavity trays, Cavity cloaks, DPC, Remedial cavity trays, Cavity trays, Party wall trays, Cavity weeps, Wall ventilators, Valley gutters, Cavity closers, cavity closers sash frame, Fire barriers, Fire stops, Cavity closers wide cavity, Access panels fire resistant, Access panels, Cavity socks, Damp proofing membranes, Dampcourse jointing tapes, Dampcourses gas resistant, Membranes Contaminated land, Radon protection systems, Roof space ventilators, Ventilation grilles, air bricks, air brick adaptors, Ventilation roof void, Ventilation roof space.

ACCESS DOORS . .
ACCESS DOORS Ceilings .
ACCESS PANELS Ceiling .
AIR BRICK Adaptors .
AIR BRICK Ducting Connectors
AIR BRICK Sleeves .
AIR BRICK Ventilators Telescopic Adjustable
AIR BRICKS . .
AIR BRICKS Ducted Cavity Liner
AIR BRICKS Polypropylene .
AIR BRICKS Ventilation .
CABLE CONDUITS Floor Ducting .
CABLE CONDUITS Floor Ducting In-Screed Trays
CABLE CONDUITS Floor Ducting Screeded Floor
CAVITY BARRIERS Acoustic .
CAVITY BARRIERS Acoustic Fire Rated 120 Minutes
CAVITY BARRIERS Acoustic Fire Rated 240 Minutes
CAVITY BARRIERS Acoustic Fire Rated 60 Minutes
CAVITY BARRIERS Fire Resistant Acoustic Building Regs Part E
CAVITY BARRIERS For Rainscreen Systems .
CAVITY BARRIERS Methane Gas Resistant .
CAVITY BARRIERS Party Walls BS 476 150 Minutes
CAVITY BARRIERS Party Walls DPC Combined
CAVITY BARRIERS Radon Gas Barriers .
CAVITY BARRIERS Robust Details Requirements .
CAVITY BARRIERS Timber Frame Applications .
CAVITY BARRIERS Ventilated Fire Seals .
CAVITY BARRIERS Ventilated Fire Seals BS 476 Part 20
CAVITY BARRIERS Ventilated Fire Seals Rainscreen Systems
CAVITY BARRIERS Ventilated Fire Seals Timber Frame Constructions
CAVITY CLOAKS . .
CAVITY CLOSERS Acoustic .
CAVITY CLOSERS Acoustic Fire Resistant
CAVITY CLOSERS AGREMENT CERTIFICATE HOLDERS .
CAVITY CLOSERS Ground Bearing Floor Insulating Perimeter Systems .
CAVITY CLOSERS Ground Bearing Party Wall Insulating Systems .
CAVITY CLOSERS Insulated .
CAVITY CLOSERS Insulated AGREMENT CERTIFICATE HOLDERS
CAVITY CLOSERS Insulated Custom Sizes
CAVITY CLOSERS Insulated DPC Combined
CAVITY CLOSERS Insulated DPC Combined Refurbishment
CAVITY CLOSERS Insulated DPC Combined Sash Frame
CAVITY CLOSERS Insulated DPC Support
CAVITY CLOSERS Insulated Fire Resistant BS 476 Part 20: 30 Minutes
CAVITY CLOSERS Insulated Fire Resistant BS 476 Part 20: 60 Minutes
CAVITY CLOSERS Insulated Fire Resistant BS 476 Part 20:120 Minutes
CAVITY CLOSERS Insulated Fire Resistant BS 476 Part 20: 90 Minutes
CAVITY CLOSERS Insulated Fire Resistant BS 476 Part 20:240 Minutes
CAVITY CLOSERS Insulated Sound Reducing
CAVITY CLOSERS NHBC/Zurich/Premier Requirements .
CAVITY CLOSERS Purpose Made Bespoke
CAVITY CLOSERS Reveal Closers .
CAVITY CLOSERS Robust Details Requirements .
CAVITY CLOSERS Wide Cavity .
CAVITY CLOSING DPCs Preformed
CAVITY CLOSING DPCs Purpose Made
CAVITY DRAINAGE Membranes .
CAVITY DRAINAGE Waterproofing Membranes .
CAVITY FIRESTOPS Cavity Wall Insulation .
CAVITY FIRESTOPS Sloping Barriers
CAVITY STOPS DPC Combined .
CAVITY TRAYS Abutment Gable Abutments
CAVITY TRAYS Acoustic .
CAVITY TRAYS AGREMENT CERTIFICATE HOLDERS .
CAVITY TRAYS Arch Window .
CAVITY TRAYS Balcony Opening .
CAVITY TRAYS Blockwork .
CAVITY TRAYS BS 5628:Part 3 .
CAVITY TRAYS BS 8215 .
CAVITY TRAYS Building Extension .
CAVITY TRAYS Building Regs. .
CAVITY TRAYS Bullseye Window .
CAVITY TRAYS Circular Window .
CAVITY TRAYS Conservatory Attachment .
CAVITY TRAYS Curved .
CAVITY TRAYS EUROPEAN TECHNICAL APPROVAL .
CAVITY TRAYS Gas Barrier .
CAVITY TRAYS Horizontal .
CAVITY TRAYS Insulating .
CAVITY TRAYS Integral Flashing .
CAVITY TRAYS Lead Substitute .
CAVITY TRAYS Leaded .
CAVITY TRAYS Lintel .
CAVITY TRAYS Masonry Support .
CAVITY TRAYS Meter Boxes .
CAVITY TRAYS NHBC Standards .
CAVITY TRAYS Non-Combustible BS EN 13501-1:2007 Euroclass A1
CAVITY TRAYS Non-Combustible BS EN 13501-1:2007 Euroclass A2
CAVITY TRAYS Parapet .
CAVITY TRAYS Party Walls .
CAVITY TRAYS Pitched Roof .
CAVITY TRAYS Polypropylene .
CAVITY TRAYS Preformed Horizontal .
CAVITY TRAYS Purpose Made .
CAVITY TRAYS Refurbishment .
CAVITY TRAYS Remedial .
CAVITY TRAYS Renewal .
CAVITY TRAYS Ridge .
CAVITY TRAYS Sill Forming .
CAVITY TRAYS Stepped .
CAVITY TRAYS Stone Mullion .
CAVITY TRAYS Threshold .
CAVITY TRAYS Threshold Level Thresholds
CAVITY TRAYS Timber Frame Constructions .
CAVITY TRAYS Undersill .
CAVITY TRAYS Vertical .
CAVITY TRAYS Wall Weeps Beak Pyramid Masony Bleed Straw
CAVITY TRAYS Wall Weeps Non-Combustible BS EN 13501-1:2007 Euroclass A1
CAVITY TRAYS Wall Weeps Telescopic Adjustable
CAVITY TRAYS Weep Combined .
CAVITY TRAYS Window Sill Window Cill .
CAVITY WALL Links .
CAVITY WALL Sleeves Fire Protection
CAVITY WALL Ventilators .
CAVITY WALL Ventilators Methane Gas Discharge
CAVITY WALL Ventilators Passive Radon Gas Evacuation
CAVITY WALL Ventilators Weep Combined
CAVITY WALL Weep Hole Ducts .
CAVITY WALL Weep Hole Ducts Concealed
CAVITY WALL Weep Vents .
CAVITY WALL Weep Vents Non-Combustible BS EN 13501-1:2007 Euroclass A1
CHIMNEY Flashings .
DAMP PROOFING Purpose Made .
DAMPCOURSE Accessories .
DAMPCOURSE Fixing Strips .
DAMPCOURSE Jointing Tape .
DAMPCOURSES .DPCs .
DAMPCOURSES Arched .
DAMPCOURSES Arched Insulating .
DAMPCOURSES Arched Insulating AGREMENT CERTIFICATE HOLDERS
DAMPCOURSES Cavity Closer Combined .
DAMPCOURSES Cavity Closing .
DAMPCOURSES Cavity Tray .
DAMPCOURSES Cavity Tray Gas Resisting
DAMPCOURSES Gas Resistant .
DAMPCOURSES Gas Retardant .
DAMPCOURSES Horizontal .
DAMPCOURSES Insulating .
DAMPCOURSES Methane Barrier .
DAMPCOURSES Petheleyne .
DAMPCOURSES Polyethylene BS 6515:1984 .
DAMPCOURSES Polypropylene .
DAMPCOURSES Preformed Profile .
DAMPCOURSES Preformed Profile Circular
DAMPCOURSES Preformed Profile Cloaks Combined
DAMPCOURSES Preformed Profile Curved
DAMPCOURSES Preformed Profile Party Wall System
DAMPCOURSES Preformed Profile System Building Applications
DAMPCOURSES Preformed Profile Timber Frame and SIPs Constructions
DAMPCOURSES Preformed Profile Timber Frame Constructions
DAMPCOURSES Preformed Units .
DAMPCOURSES Purpose Made .
DAMPCOURSES Vertical .
DAMPCOURSES Vertical Insulating
DUCTING Floor In-Screed Trays
DUCTING Underfloor Screed Floor Ducting
EAVES Bird Vermin Barrier .
EAVES Continuous Course .
EAVES Filler Combs .
EAVES Guards Gutter Drip
EAVES Protection Systems Vented Eaves Protectors
EAVES VENTS Corbel .
EAVES VENTS Insect Screen Incorporated .
EAVES VENTS Over Fascia .
EAVES VENTS Refurbishment .
EAVES VENTS Roll Form .
FABRICATIONS Bespoke Leadwork .
FASCIAS Ventilated .
FIRE BARRIERS Acoustic Tray Combined .
FIRE BARRIERS Cavity Tray Combined .
FIRE BARRIERS Cavity Wall .
FIRE BARRIERS Floor Level .
FIRE PROTECTION For Rainscreen Cladding .
FIRESTOPS Acoustic Tray Combined .
FIRESTOPS Cavity Tray Combined .
FIRESTOPS Floor Level .
FIXINGS Masonry Attachment Profiles .
FLASHING Anchoring Systems .
FLASHINGS AGREMENT CERTIFICATE HOLDERS .
FLASHINGS Colourcoated .
FLASHINGS For Profiled Sheets .
FLASHINGS Lead .
FLASHINGS Lead Chimney Stack
FLASHINGS Lead Purpose Made
FLASHINGS Non-Lead Leadfree .
FLASHINGS Synthetic AGREMENT CERTIFICATE HOLDERS
FLASHINGS Synthetic Anti-Theft
FLASHINGS Ventilating .
FLAT ROOF Vents .
GROUND GAS Sumps .
JOIST Gloves .
LEAD SHEETS . .
LEAD SHEETS BS EN 12588:1999 .
LINTEL DPC Trays .
LINTEL Stop Ends .
LINTELS Cavity Tray Combined .
LINTELS Steel Roller Shutter Combined .
LOFT ACCESS DOORS 0.35 U Value .
LOFT ACCESS DOORS BRE and NHBC .
LOFT ACCESS DOORS Building Regs. Approved Document L
LOFT ACCESS DOORS Fire Rated .
LOFT ACCESS DOORS Fire Rated BS 476:Part 22 .1/2 hour / 30 Minutes
LOFT ACCESS DOORS Fire Rated BS 476:Part 22 1 Hour / 60 Minutes
LOFT ACCESS DOORS Fire Rated BS 476:Part 22 2 Hour / 120 Minutes
LOFT ACCESS DOORS Insulated .
LOFT ACCESS DOORS Insulated PVC
LOFT ACCESS DOORS Loft Hatches .
LOFT ACCESS DOORS Loft Hatches Insulated BS 476:Part 20 60 Minutes
LOFT ACCESS DOORS Loft Hatches Insulated Building Regs Document L1/L2 Compliant
LOFT ACCESS DOORS Non-Combustible .
LOFT ACCESS DOORS Non-Combustible BS 476 Part 6: Class 0
LOFT ACCESS DOORS Part L 2010 Compliant .
LOFT ACCESS DOORS Steel .
MASONRY SUPPORT SYSTEMS Cavity Tray .
MEMBRANES Carbon Dioxide Retardant CO₂ Barrier
MEMBRANES Cavity Drain / Cavity Former See Also CAVITY DRAINAGE: Membranes
MEMBRANES Contaminated Land .
MEMBRANES Damp Proofing DPM .
MEMBRANES Gas Barrier .
MEMBRANES Gas Retardant .
MEMBRANES Loose Laid Oversite
MEMBRANES Loose Laid Radon and Methane and CO₂ Resistant
MEMBRANES Loose Laid Radon and Methane Resistant
MEMBRANES Methane Gas Retardant .
MEMBRANES Oversite .
MEMBRANES Polythene .
MEMBRANES Radon Barrier .
MEMBRANES Radon Resistant .
MEMBRANES Tanking .See Also MEMBRANES: Waterproofing
NOISE CONTROL Barriers .See Also ACOUSTIC BARRIERS:
PIER Cloaks .
PIPE Entry Seals Top Hat
RADON Barriers .
RADON Barriers Loose Laid
RADON Cavity Barriers Radon Gas Resistant
RADON Cavity Barriers Threshold Protection
RADON Gas Evacuation Passive Gas Extraction Airbricks
RADON Protection Systems .
RADON Sumps .
RAINSCREEN BAFFLES
RAINSCREEN SYSTEMS Cladding Fire Barriers Fire Protection
RENDER PROTECTION COVERS Grille Protection Covers .
ROOF Space Ventilators .
ROOF ACCESS HATCHES Hinged .
ROOF FINISH Bonding Strips .
ROOF TRIM Continuous Soaker Systems For Slate and Tile Roofs
ROOF TRIM Soaker Strips For Slate and Tile Roofs
ROOF VALLEYS Troughs Gutters
ROOF VALLEYS Troughs GRP Gutters GRP
ROOF VALLEYS Troughs GRP BS 5534 .
ROOF VALLEYS Troughs Simulated Lead Gutters Simulated Lead
ROOF VENTILATORS . .
ROOF VENTILATORS Abutments .
ROOF VENTILATORS Dry Ridge .
ROOF VENTILATORS Flush Slate .
ROOF VENTILATORS Hip .
ROOF VENTILATORS Lead .
ROOF VENTILATORS Lead BS EN 12588:1999
ROOF VENTILATORS Over Fascia .
ROOF VENTILATORS Slate Extract Vents .
ROOF VENTILATORS Soffit .
ROOF VENTILATORS Tile Vents .
ROOF WINDOW Ventilation .
ROOFING Felt Support Trays
ROOFING MEMBRANES Pitched Roof Underlay Undertiling Underslating See Also ROOFING UNDERLAYS PITCHED ROOF MEMBRANES:
ROOFING SLATES Roof Weathering Slates Lead
ROOFING SLATES Ventilator .
ROOFING UNDERLAYS PITCHED ROOF MEMBRANES Barrier Membranes .
ROOFING UNDERLAYS PITCHED ROOF MEMBRANES Undertile .
ROOFING UNDERLAYS PITCHED ROOF MEMBRANES Warm Roofs .
ROOFLINE Eaves Vents .See Also EAVES VENTS:
SCALING BARRIERS
SEALANTS Mastic .
SEALANTS Mastic: by Special Function: Lead Flashing
SERVICE CONDUITS Ducting In-Screed
SOAKER UNITS
SOFFIT VENTILATOR STRIPS PVC-u GRP
SOFFIT VENTILATORS Circular Soffit Vents .
SOFFIT VENTILATORS Continuous .
SOFFIT VENTILATORS Integral Insect Screen .
SOFFIT VENTILATORS Low Pitch (Below 15 degrees) .
SOFFIT VENTILATORS Push In .
SOFFITS Ventilated .
STRUCTURAL WATERPROOFING Cavity Drainage .
STRUCTURAL WATERPROOFING Drainage Systems .
TRAYS Sill .
VENTILATION Airbricks .
VENTILATION Fascia .
VENTILATION Flat Roof .
VENTILATION Outlets .
VENTILATION Outlets Airbrick
VENTILATION Outlets Airbrick Adaptors
VENTILATION Over Fascia .
VENTILATION Roof Void .
VENTILATION Soffits .
VENTILATION Underfloor .
VENTILATION Underfloor Telescopic
VENTILATION DUCTING Wall .
VENTILATION GRILLES . .
VENTILATION GRILLES Insect Screen Incorporated .
VENTILATION GRILLES Plastic .
VENTILATION LOUVRES . .
VENTILATION TERMINALS Flat Roof .
VENTILATORS Gas Combustion / Gas Heat Producing Appliances .
VENTILATORS Gas Combustion / Gas Heat Producing Appliances Through Wall Ventilation
VENTILATORS Through Wall Ventilation .
VENTILATORS Through Wall Ventilation Anti-Draught
VENTILATORS Wall .
WALL VENTILATION SLEEVES .
WALL VENTILATORS Cavity Wall Weep Vents .
WALL VENTILATORS Natural .
WALL VENTILATORS Telescopic Adjustable Sleeve
ADVANTAGE Abutment Trays
BEAK WEEP Cavity Wall Weep
CAVI 120 Cavity Closer
CAVI 120 Loft Access Doors
CAVI 150 Cavity Wall Barrier
CAVI 240 Cavity Wall Closer/DPC
CAVI 30 Cavity Wall Closer/DPC
CAVI 60 Cavity Closer
CAVI 90 Cavity Closer
CAVIBRICK Air Bricks
CAVICHECK Fire Stops
CAVICLOAK Preformed Damp Courses
CAVICLOSER Cavity Wall Closer/DPC
CAVILENGTHS Preformed Damp Courses
CAVILINK Cavity Wall Links
CAVILINTEL Lintel & Security Shutter
CAVIROLL DPC
CAVISTRAP DPC Fixing Strips
CAVITRAY Cavity Wall Trays
CAVIVENT Peep Weep Ventilator
CAVIWEEP Peep Weep Ventilator
CONESLATE Roof Weathering Slate
CONTINUITY CLOSER Cavity Wall Closer/DPC
DROPCLOAKS Preformed Damp Course
EUROWEEP Cavity Wall Weeps
HARDEDGE Roofing Felt Supports
LOFTHATCH Loft Access Door
MULTICOURSE Cavity Tray
ONE WAY Roof Underlay
PERFORM Flashings
QUICKCLOSER Cavity Wall Closer/DPC
RADON Cavity Barriers
READY DPC Preformed Damp Courses
SILICONBOND Lead Flashing Sealant
SITESEALER Preformed Membranes
SITESEALER Oversite Radon Membranes

COVID-19 Update January 2021 - We are open for business.

March 2021


Following yesterdays Government announcement we can confirm that as a key supplier to the building and construction industry, we remain open as usual.

Cavity Trays - Are you DPC Compliant?

March 2021


Are You DPC Compliant?

Construction is an amalgam of disciplines, in which varying Standards, build details and best practice approaches all come together in a determined sequence.

The result is usually successful, albeit not always logical.

The use of DPC over cavity wall openings is a good example.

Every opening in a cavity wall has a masonry opening dimension.

There follows a corresponding dimensioned frame to go into the opening, and an appropriately dimensioned lintel(s) to support the opening.

All measured and all scheduled.

In the midst of this, the scheduling disappears.

The important task of keeping the structure dry relies on a site operation in which DPC is unrolled, cut on site, then built into the inner skin followed by the outer skin in a manner that should harmonise with the lintel type and shape - and should in theory protect the arrangement from damp ingress.

But it regularly fails to properly do so and here are ten reasons why;

The Polythene roll DPC used is manufactured to BS 6515, and whilst this is the permitted Standard for some applications, it is not permitted to be used to form DPC cavity trays over openings!

British Standards state it should not be used.

The manufacturers of polythene DPC to BS 6515 say the same.

It is not suitable for such purposes. Furthermore, as it can offer little slip resistance, it can compromise the structural arrangement.

Alarmingly, it is currently listed as a permitted material in some Building Standards manuals and whilst it remains to be listed as a permitted material for such purposes, the exposure to damp and structural movement claims is likely to continue rather than diminish.

DPC is cut too short and does not extend sufficiently past the lintel ends.

DPC is irregular and/or does not take up the correct profile.

DPC does not project to form a defined drip lip (NHBC 6.1 D6. B) across head of frame.

Stopends are omitted and/or the DPC is not turned up to create a stop end.

First available horizontal course of inside skin is not at the ideal height to support the DPC so a lower position results in profile not conforming with Building Regulations.

First horizontal course in inner skin that can support a compliant profile is far higher – requiring a far wider DPC roll.

The DPC is cut to over-sail the lintel end by the permitted minimum of 25mm, but with lintel bearings of 100 or 150mm it means 25mm over-sail is insufficient. Thus in 50% of all brickwork situations (225mm stretcher) the DPC will not extend far enough for a stopend to be incorporated on the DPC within a naturally occurring perp joint.

Where used with an external skin concrete lintel (therefore no lintel toe as with metal lintels) the emerging DPC shows on the underside of the lintel and requires some further cutting and/or modifying to eliminate it hanging/sagging across the opening and affecting aesthetics.

Cavitrays listed alongside the lintel and window schedule provide the remedy.

Pre-shaped trays eliminate on-site variances and always harmonise with the lintel styles being used.

Cavitrays are pre-cut to length and incorporate all the correct over-sails, head drips and stopend provisions, plus they self-support so eliminate the need to search for a support course within the inner skin.

Integration is easy and swift especially with scheduled cavitrays conveniently ‘packaged ‘per dwelling’.

Scheduling the protective element of one of the most common construction undertakings makes sense, as does the use of the right DPC to achieve a compliant arrangement.

The British Standards state roll DPC to BS6515 should not be used and Building Regulation states material must be adequate for the purpose it is used.

Why ignore the requirement?

DPC’ s might look similar, but perform differently.

Think of safety glass compared with ordinary glass, - the two might look similar until performance and compliancy is questioned?

Legal and cost responsibilities where problems arise from the use of incorrect DPC and/or incorrectly formed protection must potentially rest with both specifier and user? Cavitray showing extended over-sail past lintel end.

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