Thermoguard Fire Varnish Door Upgrade System
  • Thermoguard Fire Varnish Door Upgrade System

Thermoguard Fire Varnish Door Upgrade System

THFVDUS

Thermoguard Fire Varnish Door Upgrade System is an intumescent varnish system to upgrade doors to 20 or 30min Fire Resistance:

  • Available as a convenient pack containing the required basecoat, topcoat and mastic to protect 3 doors in a clear or woodstain coloured Matt or Satin finish
  • Thermoguard UK will issue a Fire Certificate for Authority approved projects following completion
Colour
  • Current colour: Clear
Choose a colour
Close colour picker
  • Clear
  • White Low
  • White Medium
  • Light Oak
  • Teak
  • Pine
  • Ebony
  • Dark Oak
  • Walnut
  • Rosewood
  • Mahogany
  • Grey
Size
Finish
£266.00
VAT excluded

£319.20 Tax incl.
Quantity

Description

Fire Resistance to Doors using Thermoguard Fire Varnish Basecoat and Thermoguard Fire Varnish Overcoat (Exterior)

Please refer Thermoguards explanatory Technical Note (available to download HERE) to the appropriate Authority for approval before proceeding. Due to the hugely varying nature of doors and their construction, it is impractical and misleading to carry out NAMAS / UKAS Fire Test Laboratory fire door testing. Each door must be assessed for potential suitability.

The great majority of doors, including all hollow doors, are unsuitable for upgrading to 30 or even 20 minutes Fire Resistance.

There are, however, certain well constructed, solid and substantial doors capable of being upgraded with the Thermoguard Fire Varnish system as this is by far the most effective clear fire treatment or coating available.

Generally suitable doors are hardwood or solid with hardwood veneer.

Intumescent paint (white or coloured) is capable of significantly greater Fire Resistance. If you have softwood doors we suggest you refer to Thermoguard Timbercoat Door Upgrade System.

Please note: Remember, intumescent varnish is just one element of protection and DOES NOT create a ‘fire door’. Intumescent materials and hardware MUST be used to ensure your doors meet the required standards of your authority. 

Thermoguard Fire Varnish Class O Part 6 Fire Propagation Test and BS EN Class B result indicates the protected softwood did not burn significantly within the 10 mins (Part 6) and 20 mins (BS EN) test duration. Further in-house testing by Thermoguard indicated that when applied at three times the Class O / Class B spec. the Thermoguard Fire Varnish system added 15 minutes Fire Resistance.

Thermoguard assess projects requiring 30 minutes Fire Resistance on an individual basis, referring to the TRADA Char Rate Tables and calculated residual timber to ascertain whether they could issue a Fire Certificate for the project. In order to enable them to issue a 30 minutes Fire Certificate in the case of softwood the surface must be able to afford the loss of 10mm depth from all surfaces exposed to a fire. For oak or similar hardwoods the loss to take into account is 6mm.

In other words, the residual timber should be adequate, after such loss in the case of a door to avoid premature collapse, splitting or cracking ensuring neither flames or the substantial heat required to promote combustion can pass through the door.

Pine and Other Softwood

In general terms few modern softwood doors can be protected with confidence. Old and hence very well seasoned softwood doors can be protected but only if the frame can withstand 10mm loss. In these cases panels less than 16mm thick should be supplemented by inserting an additional panel to make the total panel thickness 16mm+, trapping the additional panel behind the door's beading. Substantial, solid doors unable to afford the loss of 10mm to the frame can achieve 20 minutes with the 30 min spec as below provided they can afford the loss of 4mm.

Oak and Other Resistant Hardwoods

(Including modern doors with solid compressed cores and 6mm oak veneer faces)

These doors with frames 35mm+ thick can be upgraded to 30 minutes. Any inset panel less than 12mm thick should be supplemented by an additional panel trapped by the door's beading to take overall panel thickness to 12mm+.

Door Surrounds & Seals

Thermoguard recommend the gap or joint between the architrave and wall is sealed with Intumescent mastic after application of Fire Varnish & FV Overcoat. They also recommend that intumescent strips are fitted in the door jambs and to the underside of the door.

Specification

30 Minutes Fire Resistance Specification (20 minutes in case of some softwood doors as referred to above)

  • 3 coats of Thermoguard Fire Varnish Basecoat @ 7m² per litre / per coat
  • 2 coats of Thermoguard Fire Varnish Overcoat (Exterior) – Matt or Satin @ 10m² per litre / per coat

Coverage 30 / 20 minutes (as above) - allows for the number of coats necessary

Each 3 door pack contains;

  • 2 x 20m² Thermoguard Fire Varnish Basecoat
  • 1 x 20m² Thermoguard Fire Varnish Overcoat (Exterior) – Matt or Satin finish
  • 2 x 310ml Thermoguard Intumescent Mastic White (you may need to purchase more tubes depending on the size of gaps to fill which can be done HERE)

This should be applied to 3 doors on BOTH sides (6 door sides in total) and it is assumed that this area will total no more than 14m². If your doors are unusual in size or total more than 14m² of area please contact the Technical Department.

IMPORTANT FIRE PRODUCTS NOTICE: The information displayed on this website should be used as a guide ONLY and our Technical Department should be contacted to obtain a tailored specification and any advice necessary before you place an order for fire protection products. Fire protection products are non-returnable except in accordance with Condition 8 of the Terms and ConditionsWe will not be held liable for any resulting damage to property, human life or monetary costs incurred due to the incorrect specification you have prepared or use of fire protection products caused by your negligence, including your failure to have contacted us to obtain the relevant advice/specification.

Product Details
THFVDUS

Data sheet

Typical Coverage (per coat)
3 Doors (6 doors sides) per pack
Application
Brush, Roller

questions Paul bamber joinery ltd  on 20/03/2018
Question: 

I have just done a loft conversion can the existing doors be upgraded to 30 mins. ? They are 35mm hollow flush oak veneered doors?

Answer: 

Unfortunately hollow doors cannot be upgraded.


Question about the product

* Required fields
(read)
Send
16 other products in the same category:

Envirograf Magnetic Timed Door Holder

The Envirograf Magnetic Timed Door Holder opens doors for up to 57 seconds with magnets, preventing loss of heat energy due to draughts. Works independently of existing fire alarm systems & is ideal for hospitals, care homes & hotels, etc. Works with existing door closer For single doors or a pair Prevents bucking & door...

Price £256.74
In stock

Envirograf Surface Mounted Intumescent Fire & Smoke Seals

Envirograf Surface Mounted Intumescent Fire & Smoke Seals are surface-mounted intumescent fire or fire and smoke seals providing up to 1 hour fire protection, available in a range of colours and wood veneer finishes. Supplied as a pack with intumescent paper for use around lock and hinge areas. An alternative plain seal without brush seal to allow smoke...

Price £23.46
In stock

Envirograf Economy Letterbox with Intumescent Liner

An Economy Letterbox with Intumescent Liner, sealing against smoke, draughts and weather, with up to an hour of fire protection. Meets BS476 Part 22 (1987) criteria Tested to European Standard EN1634-1 (2000) Aluminium face plates Various colours available

Price £18.78
In stock

Envirograf Door Stop for Acoustic, Draught and Smoke Protection

Envirograf Door Stop for Acoustic, Draught and Smoke Protection is a door stop set without intumescent seals, but supplied as standard with a 5mm brush smoke seal. Other seals can be used (See Envirograf Rebated Acoustic, Draught, Smoke and Weather Seal (Product 73)). All seals give smoke and draught protection, moulding available in brown, white or...

Price £12.78
In stock

Envirograf Intumescent Liner for Mail Apertures

Intumescent Liner for Mail Apertures is suitable for fire doors 38mm to 70mm thick. Supplied as 2 L-shaped self adhesive strips that can be easily cut to fit with a sharp knife. Expands in fire, sealing gaps Other sizes can be made to order Self-adhesive

Price £14.60
In stock

Envirograf Intumescent Letter Box Units

Intumescent Letter Box Units comprise a letter box flap, a smoke seal and an intumescent liner for up to an hour of fire and smoke protection. Refer to sizes and options below Lockable letter plates Internal smoke flaps Security hoods Tested to European Standard EN1634-1 (2000) Meets BS476 Part 22 1987 criteria White, black, brown,...

Price £35.92
In stock

Envirograf Weather Bar Seal

Use a Weather Bar Seal to guard against weather and draughts under doors. Easy fix Applies to bottom edge of doors Use in conjunction with Envirograf Products 106 and 107

Price £5.94
In stock

Envirograf Intumescent Hinge, Lock and Door Closer Protection

Envirograf Intumescent Hinge, Lock and Door Closer Protection is a flexible intumescent protection sheet 1mm thick, fitted with self-adhesive backing, and unaffected by moisture. Supplied in standard sizes to make installation quick and convenient. For use behind hinges and steel door closers and completely wrapped around the hidden parts of lock hardware...

Price £0.61
In stock

Envirograf Surface Mounted, Brush Smoke Seals

Envirograf Surface Mounted, Brush Smoke Seals with self adhesive backing tape are for use where intumescent seals are already fitted and smoke sealing is needed. To fit, simply peel off the backing paper from the self-adhesive strip and stick to the door frame, down the edge of the rebate. Panel pins are supplied for additional fixing. See...

Price £3.20
In stock

Thermoguard Timbercoat Door Upgrade System

Thermoguard Timbercoat Door Upgrade System is an intumescent paint system to upgrade doors to 30min Fire Resistance and 30min Fire Doors to 60min:  Available as a convenient pack containing the required basecoat and topcoat to protect 2 doors in a white or coloured Eggshell or Gloss finish Thermoguard UK will issue a Fire Certificate for...

Price £141.00
In stock

Envirograf Door Threshold Ramps and Seals

The Door Threshold Ramps and Seals system is designed with wheelchair users in mind, for easy passing from carpeted to non-carpeted areas, internally & externally. Refer to ordering references below Use with other Envirograf door seals for acoustic, draught & weather protection Supplied with screws for fixing Complies with Document M Building...

Price £17.47
In stock

Envirograf Replacement Hardwood Door Edging

Envirograf Replacement Hardwood Door Edges are supplied to fit doors with a thickness between 40mm and 56mm, and it is supplied in 2100mm lengths. It is a complete door edge with concealed intumescent and smoke available for gaps 3mm, 5mm, 7mm and with brushes available for other gap sizes. Ideal for use in heavy-traffic areas prone to damage, such as...

Price £52.61
In stock

Envirograf Rebated Intumescent Fire Seals

Envirograf Rebated Intumescent Fire Seals are intumescent self-adhesive seals for rebating, supplied in lengths of 1050mm & 2020mm. Available in white, brown, black red and real wood veneer or polished aluminium face finishes. These seals offer 30 & 60min protection and are for use in frames, edges of fire doors and behind door frames....

Price £1.12
In stock

Envirograf Glazing Bead System

Envirograf Glazing Bead System is a complete glazing systems consisting of 2100mm length timber beads coated and sealed with intumescent coating for fire doors/screens. All beads supplied in a PVC sleeve for transit. Supplied as standard without bolection moulding lip. Ideal for doors & screens. The beads can be over painted or varnished & they are...

Price £26.74
In stock

Envirograf Surface Mounted Acoustic, Draught, Smoke and Weather Seals

Envirograf Rebated Acoustic, Draught, Smoke and Weather Seal is a 3mm deep x 10mm wide x 2100mm long aluminium or plastic holder containing a brush seal in various sizes and colours or a black rubber seal in various sizes and patterns. The holder has a self-adhesive backing for ease of fitting. The seal holder is rebated into wooden doors or...

Price £12.33
In stock

Envirograf Weather Board

Use a Weather Board to guard against weather and draughts under doors. Easy fix Applies to bottom edge of doors Use in conjunction with Envirograf Products 106 and 107

Price £14.20
In stock