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FLOOR INSULATION

FLOOR INSULATION

Floor insulation is one of the best forms of building insulation due to the fact that as much as 20-30% of heat, escapes through floor elements. Moreover, it is building material maintenance-free once installed. By installing floor insulation, you not only improve the thermal envelope of the building but also you create a complete seal around the building. At the same time you reduce the potential for heat to escape. As well as reducing heat loss, installing floor insulation can also help to minimise sounds created by floorboards, reduce drafts and create a warmer floor surface. For information on how to cut PIR click here. To find out what is the best floor insulation click here.

FLOOR INSULATION THICKNESSES

The building regulations require that floors achieve minimum thermal performance U-values and this affects the amount of insulation required. Achieving a U-value of 0.25 W/m2K or less would require at least 70mm of Phenolic high-performance foam insulation called Kingspan® K103, 150mm of Knauf® or Rockwool® Mineral Wool and 200mm of EPS100 polystyrene. In the case of PIR Rigid Insulation Boards, thickness of 120mm is normally used. In terms of XPS boards such as Soprema SL or STS, 50mm thickness is sufficient for the floor insulation. If you are concern about compressive strength of the floor insulation material, you should consider buying XPS extruded polystyrene board with the highest compressive strength ranging from 300kPa to 800kPa, followed by PIR rigid insulation boards (150kPa) manufactured either by Kingspan, Celotex, Xtratherm, Iko-Enertherm, Ecotherm or Recticel GP.

 


TIMBER FLOOR INSULATING

If your floor is above an unheated cellar or basement you will need to fit the insulation snugly between the joists and secure in place with netting if required. Solid insulation boards or rolls of mineral fibre can be fitted between the flooring joists. Plasterboard should then be fixed to the ceiling of the basement to provide fire resistance. If you have a suspended floor, with a small cavity below that is hard to access, you would normally have to take up the floorboards in order to fit the insulation. By correctly insulating suspended timber floors you can save money. As you keep more heat inside your home with floor insulation you’ll reduce the amount of energy you use whilst keeping your house snug. Where old floorboards are relayed or new ones installed, careful attention is needed to ensure that all joints between boards are adequately sealed. For more information on how to insulate timber floor click here

 


CONCRETE FLOOR INSULATING

If your home is newer then it is likely you have a ground floor made of concrete. You can still insulate them by laying a new layer of rigid foam insulation on top. Insulating your floor underneath the concrete slab can help regulate the temperature and prevent over-heating in rooms that are south-facing or occupied for long periods of the day due to the thermal mass of the concrete. The damp proof membrane can be placed above or below the concrete slab, depending on the particular product. If the membrane is placed above the slab an additional membrane may be required to protect the insulation from ground contaminants. In this case insulation can be added over the existing concrete slab or underneath a new one. Where insulation is placed above the slab, the rooms will warm up more quickly when the heating is switched on. High performance insulation panels or boards are often the best materials to insulate an existing concrete slab floor as they provide the best thermal performance at any given thickness. Keeping the thickness of your insulation to a minimum will reduce the likelihood of having to make costly alterations to door openings, stairs and other fixtures as a result of the increase in floor height. It is a good idea to lay a damp-proof membrane underneath the insulation. When insulating above the concrete slab, the floor finish over the insulation can be either screed or boarding. It is argued that a screed finish is more durable and can offer some thermal mass otherwise absent. Board finishes, on the other hand, can be quickly installed and provide a quicker thermal response time. To find out more on how to insulate concrete floor click here.

 


FLOOR INSULATING COST | UNDERFLOOR INSULATING | UK 

The total floor insulation cost has two parts. The cost of materials and the cost of installation. The average cost for suspended floor insulation is £155 per m2. Floating floor insulation costs are typically one of the cheaper floor insulation options. Naturally, costs will vary depending on the size of the room and the type of floor. As far as home improvement jobs go, this one is relatively reasonable regarding pricing. Prices depend on whether you do it yourself or get the professionals in. Having a timber floor insulated professionally, including filling the gaps between the floorboards and around the skirting, depends on the size and shape of the room and the insulation material used, but typically costs around £950. The cost of insulating a concrete floor can vary greatly, especially if the concrete is removed or additional works are done, but costs will probably start around £1,450. According to the Energy Saving Trust you could save between £40-£65 per month on your energy bill through floor insulation.

 


TYPES OF FLOOR INSULATION

There are 6 main types of floor insulation, with different production technologies and compositions. Some boards rely more on thermal insulation values, and some more on compressive strength, but in the end they all aim to maximize the temperature reduction on the cold side. The UK floor boards come in standard sizes: 1200mm x 600mm and 2400mm x 1200mm (8'x4'). For more information on types of floor insulation click here.

 EPS

EPS sheet is one of the best-known floor insulation materials because expanded polystyrene board is a easy to install and have a high insulation value. Either Jabfloor or Kay-Metzeler range of insulation boards have been manufactured specifically for use with flooring. While EPS70 polystyrene is used to insulate floors between joists, EPS 100 is recommended to use under concrete, because it is a much denser material offering 100kPA compressive strength.

 PIR BOARDS

While EPS boards are budget friendly insulation boards, PIR Rigid Insulation Boards are most popular in the UK. Since the blowing agent evaporates during this reaction a rigid closed cell middle density insulation product is created. PIR boards offer compressive strength of 150kPa and are used to insulate the floor, because they come as rigid which means they are easy to cut into the shapes required. Additionally, PIR insulation boards are incredibly lightweight and relatively thin, whilst still providing high levels of insulation. There are a number of ranges of floor insulation boards available to choose from. Either Celotex, Kingspan or Xtratherm brands are the most popular polyisocyanurate boards used to insulate floors. Celotex offers TB4000, GA4000 and XR4000 PIR Boards range with compressive strength of 120kPa, followed by Xtratherm Thin-R PIR Insulation Boards with 150kPa, Kingspan offers ThermaFloor TF70 Floor Insulation Board with 140kPA compressive strength.

 XPS BOARDS

Xps insulation board is specifically designed for use with underfloor heating systems on concrete & wooden floors. In fact, it is a high strength (usually 300kPa) extruded polystyrene board suitable for any floor construction including below a concrete slab, below a screed and below chipboard. It is significantly denser than other types of insulation, which gives it a greater compressive strength. Its closed cell structure also resists both moisture and water vapour ingress. Due to its compressive strength, XPS is regularly used in applications where it is going to be under some strain, such as car park decks. It’s also great for use in basements. These boards are available in 30mm, 50mm80mm and 100mm thickness. Among widely available insulation materials, extruded polystyrene (XPS) insulation offers one of the broadest range of compressive strengths of 300, 500 or 800kPa. It is also one of the few floor products where manufacturers invest the time to test and declare compressive creep. There are a few main manufacturers offering XPS products. While Soprema offers an SL version with compressive strength of 300kPa, Kingspan with its Greenguard GG offers either 300kPa, 500kPa or 700kPa. On other hand Polyfoam offers square edged xps standard board that has a middle class compressive strength of 200kPa.

 PHENOLIC BOARDS

Phenolic board is a top shelf panel that can be used to insulate floors in both new build and refurbishment of residential, commercial and industrial buildings. As a part of Kooltherm range, Kingspan K103 Floorboard offers fibre-free rigid thermoset phenolic core with thermal conductivity of just 0.018 W/mK across all thicknesses. In fact, K103 is a premium product in terms of floor insulation. Product has been developed by Kingspan as a premium floor insulation board, providing high performing insulation with a thinner material than was possible before. K103 Kooltherm can be used on both solid concrete and suspending floors. Kingspan is followed by Unilin brand with SR/UF Safe-R Phenolic Floor Insulation Board. Unilin phenolic board offers thermal conductivity of 0.020W/mK and compressive strength of 150 (kPa).

 UNDER CONCRETE INSULATION

Cordek® company have created a wide range of Cellcore HX Plus void formers with an extra added insulation. This two in one solution is designed for use beneath reinforced concrete floor slabs to protect against the potential effects of ground heave with the additional Filcor EPS100 insulation layer protected by a ultra thin polypropylene sheet on top. HX Plus under slab is a combination product. In fact, it has a range of cellular legs with different depths of insulation glued onto the top of those cellular legs dependent upon the target U-value that you need to hit. Iincorporates an integral layer of EPS insulation available in various thicknesses to meet thermal performance requirements. HX Plus is made in 25mm increments, which means insulation material ( Filcor ) is added.

 MINERAL WOOL 

In terms of floor insulation, Rockwool and Knauf are the most recognised brands in the UK due to the fact they can be installed through simple friction fitting. Mineral wool is an insulating material made of natural raw materials. The raw materials from which mineral wool is produced are non-flammable. Due to the mechanical effect of fibres, Mineral wool is an excellent insulating material because there is "trapped" air between the basalt or glass fibers. The fibrous structure of wool causes the sound waves passing through it to be scattered and suppressed. The higher density (heavier) product is used as higher mechanical insulation parameters are required. Rockwool Acoustic insulation RWA45 is a particular favourite with customers, providing thermal insulation and fireproofing on top of its acoustic dampening credentials. On other hand Rockwool with its HARDROCK® Multi-Fix (DD) offers an outstanding density of 160kg/m

 

We offer a wide variety of floor insulation (maybe not as much as in B&Q), but we keep most common insulation thickensses like: 50mm, 80mm, 100mm, 150mm, 200mm,

 

Video credit:https://www.youtube.com/watch?v=1hDW6b3mT5w&t=10s

 

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Brand: Novia® Model: VC2T Reinforced Synthetic 75m2
Novia VC2T is an innovative waterproof and flame resistant synthetic HDPE scrim reinforced laminate for use in temporary protection applications. It is cheaper, lighter and more practical to use than the old-style paper versions.  Protecting heavily trafficked areas, new surfaces and finishes ..
  • Lightweight but strong, scrim-reinforced material
  • Flame-resistant to EN 13501 Class E - Fully waterproof
  • HDPE scrim reinforced - Recyclable
  • Roll weight of only 9kg - Lightweight
  • Suitable for a wide range of temporary applications
£ 160.82
Ex Tax:£ 134.02
Estimated delivery: 2-3 working days
Brand: Unilin Insulation (UK) known as Xtratherm Model: 100mm Unilin ECO360 Floor
100mm Unilin ECO/MA 360 Floor Insulation is a bio-enhanced, superior performance PIR rigid foam insulation board suitable for underfloor heating, solid and suspended floors. It is lightweight, easy to install and combines high compressive strength with low thermal conductivity, providing a high p..
  • Unilin ECO/MA 360 Premium Floor PIR Insulation Board (Floorboard)
  • High performance - Thermal conductivity (lambda value) of 0.020 W/mK
  • 100mm Unilin ECO360 meets U-Values specified in the Building Regulations
  • RIBA/RIAI Climate Challenge 2030, LETI Standards, Future Homes Hub targets
  • Bio-enhanced board will significantly improve the U-Value of new and existing floors
£ 563.88
Ex Tax:£ 469.90
Estimated delivery: 5-7 working days
Brand: Unilin Insulation (UK) known as Xtratherm Model: 100x225x1200mm XT/HYF Strip System
100x225x1200mm Hyfloor Strip Foundation System Unilin XT/HYF is an engineered floor insulation used to achieve Future Homes Standard and passive floor performance. The Hyfloor Strip Foundation System provides effective insulation that has been detailed and installed professionally at the initial ..
  • 100x225x1200mm Hyfloor Strip Foundation System Unilin XT/HYF
  • Engineered floor insulation with high performance foundation riser panels
  • Used to achieve Future Homes Standard and passive floor performance
  • Hyfloor System that provides thermal performance and robust detailing
  • Suitable for use with built-in full fill and partial fill wall insulation
£ 47.88
Ex Tax:£ 39.90
Estimated delivery: 5-7 working days
Brand: Fermacell® Model: 10mm Firepanel A1 Fermacell
10mm Fermacell Firepanel is a homogeneous fibre-reinforced gypsum based dry lining fire protection board reinforced with non-flammable fibres for superior fire protection. Firepanel A1 is a new dimension in fire protection for dry linings, an innovative development of the original Fermacell Gyps..
  • 10mm Fermacell Firepanel Class A1 Non Combustible Fire Protection Board
  • Homogeneous fibre-reinforced gypsum based dry lining fire protection board
  • Firepanel is reinforced with non-flammable fibres for superior fire protection
  • Fully complies with construction building materials class A1 non-combustible
  • Firepanel partition system to EN 1364-1 provides 60 minutes fire rated lining
£ 107.03
Ex Tax:£ 89.19
Estimated delivery: 5-7 working days
Brand: Isomass Model: 10x25mm Self Adhesive Isolation Strip (10m)
10mm x 25mm Acoustic Isolation Strip is specially designed for joists and studs, a cross linked Isopoli foam with a self adhesive layer backing allows easier installation of the strip to be held in position. Isolation Strip is used for upgrades when looking to increase impact sound insulation fro..
  • 10x25mm Isocheck Acoustic Isolation Strip Self Adhesive 10m Roll
  • Made from a cross linked Isopoli foam and a self adhesive layer backing
  • Increase impact sound insulation and reduce structure-borne noise
  • Self Adhesive Isolation Strip for easy application to the studs or joists
  • Noise reduction system used for partition/separating walls and floors
£ 60.00
Ex Tax:£ 50.00
Estimated delivery: 3-5 working days
Brand: Celotex® Model: 110mm XR4000
110mm Celotex XR4000 PIR Insulation Board (XR4110) is an easy to cut and install multi-purpose polyisocyanurate rigid foam insulation board featuring a low emissivity foil facings that is suitable for floor, wall, roof and ceiling cut-to-fit applications. Celotex Insulation Board is an excellent ..
  • Size: 2400mm x 1200mm
  • Board covarage: 2.88m2
  • Thermal Conductivity: 0.022 W/mk
  • Surface spread of flame: Class 1
  • BBA Approved (Cert no 17/5405, 16/5352)
£ 1,437.01
Ex Tax:£ 1,197.51
Estimated delivery: 5-7 working days
Brand: Celotex® Model: 12mm TB4000
12mm Celotex TB4000 PIR Insulation Board (TB4012) is an easy to cut and install multi-purpose polyisocyanurate rigid foam insulation board featuring a low emissivity foil facings that is suitable for floor, wall, ceiling and roof cut-to-fit applications. Celotex Board is an excellent high-perform..
  • Size: 2400mm x 1200mm
  • Board covarage: 2.88m2
  • Thermal Conductivity: 0.022 W/mk
  • Surface spread of flame: Class 1
  • BBA Approved (Cert no 17/5405, 16/5352)
£ 0.00
Ex Tax:£ 0.00
Estimated delivery: Out Of Stock
Brand: Fillcrete Model: 12mm Fillaboard
12mm Fillcrete Fillaboard 8x4 Sheet is a special type of bitumen impregnated fibreboard used for concrete expansion, movement joints and as a general purpose expansion joint filler to reduce the risk of cracking. FILLABOARD is an ideal solution for use in expansion joints for concrete in such app..
  • 12mm Fillcrete Fillaboard 8x4 Sheet 2440mm x 1220mm - 2.98m²
  • Bitumen impregnated fibre-board used for concrete expansion
  • General purpose expansion joint filler to reduce the risk of cracking
  • FILLABOARD meets the requirements of the British Specification 033
  • Highly resistant to moisture penetration and ice formation in joints
£ 42.14
Ex Tax:£ 35.12
Estimated delivery: 2-3 working days
Brand: Fillcrete Model: 12x100mm Fillerboard Strips
Euro Accessories Fillerboard Expansion Joint Strip 12mm x 100mm x 2440mm is a multi purpose bituminous wood fibre strip used as an expansion joint filler for concrete slab and wall construction to reduce the risk of cracking. 12mm thick by 100mm wide Fillerboard Jointing Strips packed in 20 str..
  • Euro Accessories Fillerboard Expansion Joint Strip 12x100x2440mm
  • 12mm thick 100mm wide Wood Fibre Fillerboard Strips (pack of 20)
  • Highly resistant to moisture penetration and ice formation in joints
  • Required to relieve stress and reduce the risk of cracking in a concrete
  • Multi purpose bituminous wood fibre strip used as an expansion joint filler
£ 103.99
Ex Tax:£ 86.66
Estimated delivery: 2-3 working days
Brand: Cordek® Model: 135mm Cellvent HX (Grade 7/10)
135mm Cellcore Cellvent HX Grade 7/10 combines the benefits of the Cellcore HX range with Ventform to alleviate the effects of ground heave whilst also providing an excellent gas venting medium. Cellvent HX is available in a range of specifications and can be used in conjunction with gas membrane..
  • 135mm Cordek Cellcore Cellvent HX Cellular EPS Void Former
  • Cellvent HX Grade 7/10 Maximum Concrete Depth 220mm
  • Reinforced ground floor slabs where subsidence is not expected
  • Used to alleviate the effects of ground heave and gas venting
  • Combined ground heave protection and passive gas venting system
£ 180.43
Ex Tax:£ 150.36
Estimated delivery: 5-7 working days
Brand: Isomass Model: 14mm Isocheck 14C
14mm Isocheck 14C Floorboard is an acoustic overlay floor system specially designed for concrete floors to reduce impact sound transmission, suitable for new build projects, refurbishments and conversions. Acoustic Overlay Isocheck 14C system does not need the additional protection of a moisture ..
  • 14mm Isocheck 14C Acoustic Overlay Platform System (Floorboard)
  • Acoustic overlay floor system specially designed for concrete floors
  • 14C is suitable for new build projects, refurbishments and conversions
  • Meet the sound transmission standards of Approved Document E 2003
  • May also be installed in conjunction with underfloor heating systems
£ 30.04
Ex Tax:£ 25.03
Estimated delivery: 5-7 working days
Brand: Cordek® Model: 155x600x2400mm HX B Grade 7-10
HX B Under Beam 2400x600x155mm Grade 7-10, an unique EPS based board with hollow core and moulded legs used beneath reinforced concrete ground beams and pile caps. Cellcore HX B Grade 7-10 is fully tested, calculated and calibrated for concrete thickness up to 220mm to protect ground beams agains..
  • 155mm thick Cellcore Under Beam HX B Board cut to 600mm widths
  • HX B Ground Beams Grade 7-10 max. concrete depth up to 220mm
  • Protects ground beams against the potential effects of ground heave
  • Used beneath reinforced concrete ground beams and pile caps
  • Special hollow construction expanded polystyrene (EPS) block
£ 65.88
Ex Tax:£ 54.90
Estimated delivery: 3-5 working days
Brand: Cordek® Model: 155mm (Grade 7/10)
155mm Cordek Cellcore HX B Under Beam 7/10 is a concrete ground beam protection EPS block designed for use beneath reinforced concrete ground beams and pile caps to protect against the potential effects of ground heave.  Cellcore HX B Grade 7/10 is calculated and calibrated for concrete thickness..
  • 155mm Cellcore HX B Under Beam EPS
  • Cellcore HX B - Grade 7/10
  • Maximum Concrete Depth 220mm
  • EPS Ground Beams Protection
  • BBA Certified Ground Heave Solutions
£ 124.97
Ex Tax:£ 104.14
Estimated delivery: 3-5 working days
Brand: Cordek® Model: 155x450x450mm Pile Collars
155x450x450mm Claymaster Pile Collars are compressible low density Expanded Polystyrene (EPS) products, used when foundations need to be protected against ground heave. The Heaveguard (Claymaster) pile collar is an engineered material in green or pink color designed to safeguard piles against upl..
  • 155mm Cordek Heaveguard (Claymaster) EPS Pile Collars
  • Manufactured to suit the width of the ground beam
  • Used when foundations need to be protected against ground heave
  • Used with Cordek Cellcore HX S Under Slab and HX B Under Beam
  • Safeguards piles against uplift damage caused by expansive clay soils
£ 29.88
Ex Tax:£ 24.90
Estimated delivery: 3-5 working days
Brand: WHITEROCK® Construction Products Model: 15mm ISOFoam ISOF15
15mm ISO Foam (diameter 12mm) Piling and Debonding Foam is a polyethylene based closed cell sleeve, used to debond the reinforcement from the concrete and for insulating heating and plumbing pipes. ISO Foam has low thermal conductivity of 0.036W/mK at 0 °C therefore its reduces the loss of heat f..
  • 15mm Isofoam (diameter 12mm) 2000mm length
  • Piling and Debonding Foam Polyethylene Sleeve
  • Used also for insulating heating and plumbing pipes
  • Used to prevent the concrete adhering to the reinforcing bars
  • Sound absorbing properties, reducing pop and flow noises in pipes
£ 1.98
Ex Tax:£ 1.65
Estimated delivery: 2-3 working days