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Roof Insulation

Thermal roof insulation is usually installed to improve thermal performance of the house (reduce heating and cooling of space). This in turn reduces energy use to make the house warm. It also reduces carbon dioxide emission to make the house more environmentally friendly and also reduces energy cost. The advantages of installing roof insulation are the increase in living space (converted lofts) and the elimination of condensation on roof surfaces during cold temperatures.

The roof insulation must be installed dry and be kept in this state. When installing board and batt type roof insulation, gaps should not be left as they minimize roof insulation effectiveness. Other factors influencing roof insulation effectiveness include temperature cycling, vibrations, and other similar mechanical forces. The functionality of your roof membrane is also crucial. If you cannot install roof insulation correctly, you will seriously impair its efficiency.

Two types of roof are most commonly found in commercial and residential settings: Flat Roof and Pitched Roof.

Flat Roof

Flat roof can be constructed to create what is called a ‘warm roof’ or a ‘cold roof’ depending on the position of the insulation installed. Inverted roof construction is also used in flat roofs exposed to high temperatures.

Pitched Roof

Depending on the design two types of pitched roof can be found: with a ceiling and without a ceiling. Pitched roofs also use cold and warm specification. These can be further classified into cold breathing, cold ventilated, warm breathing and warm ventilated roofs.

Insulationhsop.co offers a wide range of flat and pitched roof insulation from the manufacturers: Celotex, Xtratherm, Knauf, Kay Metzeler, Cellecta and others. For more information about the particular products please see product description.

R-value Comparison Chart for Roof Insulation for products available at Insulation Shop


Legend

1* Rockwool RW3 Slab (Prorox SL930)

2* Earthwool RS45 Universal Slab, Earthwool RS60 Universal Slab, Earthwool RS100 Universal Slab, Rockwool RWA45 (Prorox SL920)

3* Earthwool Flexible Slab, Rockwool Flexi Insulation Slab

4* Rockwool Hardrock Multi-Fix Dual Density Board

5* Rockwool RW5 Slab (Prorox SL960)

6* Celotex FR5000 Fire Resistant Insulation Board, Xtratherm XtroLiner Insulation Board

7* Celotex TB4000 Insulation Board, Celotex GA4000 Insulation Board, Celotex XR4000 Insulation Board, Celotex Crown-Bond Flat Roof Insulation Board, Celotex Crown-Fix Flat Roof Insulation Board, Celotex Crown-Up Flat Roof Insulation Board, Kingspan Thermapitch TP10 Pitched Roof Insulation Board, Kingspan Thermaroof TR26 Insulation Board, Xtratherm Thin-R Insulation Board, Recticel Eurothane GP Insulation Board, EcoTherm EcoVersal Insulation Board, Kingspan Thermaroof TR31 bonded to Plywood, Xtratherm Plydeck bonded to OSB, Recticel Plylok Flat Roof Insulation bonded to Plywood, EcoTherm Eco-Deck - Insulated Flat Roof Decking

8* Kingspan Thermaroof TR24 Insulation Board, Kingspan Thermaroof TR27 Insulation Board, Xtratherm Flat Roof Board FR-MG, Xtratherm Flat Roof Board FR-BGM

9* Kingspan Kooltherm K7 Pitched Roof Board, Xtratherm Safe-R insulation Board

10* Cellecta Yelofoam X2i, Cellecta Hexatherm XPLY Plywood Thermal Laminate Roof Board, Kingspan Styrozone H350R Flat Roof XPS Board

11* Grey Polystyrene (Graphite) EPS

12* Cellecta Hexatherm XROOF 300L XPS, Cellecta Hexatherm XDRAiN

13* Cellecta Hexatherm XROOF 300L XPS, Cellecta Hexatherm XMD Vertical Up-Stand Roof Board, Cellecta Hexatherm XDRAiN Drainage Channel Inverted Roof Board, Sundolitt XPS300 Extruded Polystyrene Board

14* Kingspan Styrozone N300R XPS Board 

15* EPS100 Polystyrene Insulation Board Jablite, Kingspan Styrozone N500R XPS Board

16* EPS70 Polystyrene Insulation Board Kay-Metzeler 

17* Jablite EPS70 Polystyrene Insulation Board

18* White Polystyrene Board

CHOOSE MANUFACTURERS

96mm Recticel Plylok PIR Flat Roof Insulation Board - 90mm PIR and 6mm Plywood Sheet
Guide Price
Brand: Recticel Model and Size: 1200x2400mm - 2.88m2
Delivery Time: 1-3 working days
96mm Recticel Plylok PIR Flat Roof Insulation Board is a rigid PIR board consisted of a few bonded elements contributing to its thermal performance and rigidity. The closed cell rigid 90mm PIR foam core is faced on both sides with multi-layer aluminium foil and bonded to 6mm WBP plywood. It is ..
Guide Price: £144.76
£173.71 inc VAT
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Brand: Recticel Model and Size: GP1200x2400 - 2.88m2
Delivery Time: 1-3 working days
25mm Eurothane GP comprising a rigid polyisocyanurate (PIR) core faced on both sides with a gas tight multilayer composite aluminium foil facing is the ideal choice for pitched roof, floor or framed wall applications. With a low thermal conductivity value (0.022 W/mK) providing an excellent the..
£13.94
£16.73 inc VAT
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Brand: Celotex Model and Size: 1200x2400mm - 2.88m2
Delivery Time: 1-3 working days
Celotex TB4020 is targeted at cut-to-fit applications between rafters or joists and enables users to achieve lower U-values with a single layer of insulation than has previously been possible. TB4012 is also appropriate for use in floors and walls. With low emissivity foil facings, TB4012 is manufac..
£30.68
£36.82 inc VAT
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Brand: Arbet Model and Size: 1000x500mm - 30m2
Delivery Time: In Stock 1-2 working days
10mm Grey Polystyrene (Graphite) is a high quality expanded polystyrene (EPS) board enhanced with integrated graphite within its bead structure and of grey colour. The high-purity graphite particles integrated within the insulation beads reflects radiant heat and significantly improves insulati..
£39.33
£47.20 inc VAT
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Brand: Arbet Model and Size: 1000x500mm - 30m2
Delivery Time: In Stock 1-2 working days
10mm White Polystyrene Board is a very lightweight and easy to handle and install, expanded polystyrene (EPS) board specially designed to be used as a part of various external wall insulation systems. It can be used in applications requiring transfer of small mechanical loads.Please note polystyrene..
£36.29
£43.55 inc VAT
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25mm EPS70 Polystyrene Insulation Board Jablite (pack of 12)
Guide Price
Brand: Jablite Model and Size: 2400x1200 (34.56m2)
Delivery Time: 2 - 3 working days
25mm Jablite EPS is a lightweight cellular plastic material suitable for a wide range of building insulation applications. It is an excellent insulating medium which exhibits consistent thermal performance over the range of temperatures normally encountered in buildings. The material is versatile, l..
Guide Price: £86.98
£104.38 inc VAT
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25mm EPS70 Polystyrene Insulation Board Kay-Metzeler (pack of 12)
Guide Price
Brand: Kay-Metzeler Model and Size: 2400x1200mm - 34.56m2
Delivery Time: 2 - 3 working days
25mm EPS70 Kay-Metzeler boards are manufactured by cutting expanded foam blocks. These boards are placed above a concrete slab or a precast concrete floor in domestic ground-floor constructions and finished with a wearing layer of chipboard to meet the Building Regulations' U-value requirements. Kay..
Guide Price: £86.98
£104.38 inc VAT
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50mm EPS100 Polystyrene Insulation Board Jablite (pack of 12)
Guide Price
Brand: Jablite Model and Size: 2400x1200 - 34.56m2
Delivery Time: 1 - 2 weeks
50mm Jablite EPS 100 board is a lightweight and cost efficient product which can be used for insulation of different constructions, including roofs, floors and walls, since it provides constant and stable thermal performance under different temperature conditions. It is made from expanded polystyren..
Guide Price: £189.60
£227.52 inc VAT
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Brand: Cellecta Model and Size: 600x1250mm - 0.75m2
Delivery Time: 2 - 4 days
50mm Cellecta Hexatherm XROOF 300L is an extruded polystyrene thermal insulation board designed specically for inverted roof applications where a high resistance to compression and water absorption is essential. XROOF roof insulation boards are ideal for a multitude of roofing requirements, inc..
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30mm Sundolitt XPS300 Extruded Polystyrene Board (pack of 14) 30mm Sundolitt XPS300 Extruded Polystyrene Board (pack of 14)
Guide Price
Brand: Sundolitt Model and Size: 1200x600mm - 10.08m2
Delivery Time: 2 - 3 working days
30mm Sundolitt XPS300 is an extremely durable thermal insulation board made of extruded polystyrene offering exceptional thermal performance and versatility. It is a lightweight board that is able to withstand extreme loads. Sundolitt XPS300 is highly water resistance, so can be stored and installed..
Guide Price: £83.47
£100.16 inc VAT
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Brand: Cellecta Model and Size: 600x1250mm - 0.75m2
Delivery Time: 2 - 4 days
50mm Cellecta Hexatherm XDRAiN is a high performance extruded polystyrene inverted thermal roof boards, featuring integrated drainage channels on their underside, which speeds up the shedding of rainwater from the roof, eliminating the need for a separating drainage mat, making them ideal for green ..
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Brand: Cellecta Model and Size: 1200mm x 2400mm - 2.88m2
Delivery Time: 2 - 4 days
56mm Cellecta Hexatherm XMD is a high performance extruded polystyrene thermal insulation board bonded to a 6mm thermal laminate facing, suitable for vertical upstands. It combines the benefits of high performance extruded polystyrene with a facing board to produce a composite thermal board to suit ..
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Brand: Low-E Model and Size: 65mm x 45m - Free Delivery
Delivery Time: 1-3 working days
Low-E Seam Tape is a pure aluminium foil tape and has a Class 1 Fire Rating. This tape has a reinforced scrim mesh under the surface of the tape and increases its tensile strength. This tape is manufactured using the highest quality foil and high strength adhesive. Once applied, it will not de-lamin..
£26.62
£31.94 inc VAT
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Brand: Low-E Model and Size: 1.25m x 4m - 5m2 - Free Delivery
Delivery Time: 2 - 3 working days
5m2 Low-E EZY-Seal Reflective Foil Insulation Roll gives a superior air infiltration barrier that reduces draughts and uncontrolled air movement and also increases thermal performance by blocking up to 97% of radiant heat. It is also a vapour control layer. Low-E EZY-Seal Reflective Foil I..
£49.64
£59.57 inc VAT
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Brand: Kingspan Model and Size: 3m x 100m - 300m2
Delivery Time: 3 - 5 days
Kingspan Aquazone is a high performance non-woven polyethylene membrane suitable for use on inverted roofs finished with gravel ballast, green roof systems and concrete pavers on appropriate supports. Kingspan Aquazone can can dramatically minimise the cooling effect associated with rainwater flowin..
£566.21
£679.45 inc VAT
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Kingspan Nilvent - Breathable Membrane for Unventilated Pitched Roofs
Guide Price
Brand: Kingspan Model and Size: 1.5m x 50m - 75.00m2
Delivery Time: 5 - 7 days
Kingspan Nilvent will give a completely watertight structure under normal weather conditions. Kingspan Nilvent is highly water resistant, and has the added advantage of selfsealing around nail penetrations. These properties mean that it can be safely used even in constructions with a large number of..
Guide Price: £130.00
£156.00 inc VAT
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135mm Actis Eolis HC - Multifoil Reflective Insulation - 1.5m x 8m Roll
Guide Price
Brand: Actis Model and Size: 1.5m x 8m - 12m2
Delivery Time: 1-3 working days
135mm Actis Eolis HC is a multi-foil reflective insulation with an integrated vapour barrier offering dual features within a single product used behind the internal finish. The product offers a unique solution for existing warm pitched roofs with HR underlays and shallow rafters. Usually such build-..
Guide Price: £166.06
£199.27 inc VAT
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30mm Thinsulex TLX Silver Multi-foil Insulation
Guide Price
Brand: TLX Insulation Model and Size: 1.2m x 10m - 12m2
Delivery Time: 2 - 3 working days
30mm TLX Silver Multi-foil is an insulation material composed of outer layers of coated metallised film, laminated to a non-woven polypropylene fabric encasing the core and welded along both long edges. The core of the product comprises five layers of polyester fibre wadding separated by four metall..
Guide Price: £94.00
£112.80 inc VAT
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Thinsulex TLX Gold Multifoil Insulation
Guide Price
Brand: TLX Insulation Model and Size: 1.2m x 10m - 12m2
Delivery Time: 2 - 3 working days
TLX Gold Thinsulex Multifoil Insulation is a 2 in 1 insulating breather membrane, venting moisture like a breather membrane, whilst insulating like non-breathable PIR board. The key benefit of the product is to improve the thermal performance of a roof without concern of condensation or having to ad..
Guide Price: £182.85
£219.42 inc VAT
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Brand: Ceresit Model and Size: Ceresit WhiteTeq
Delivery Time: 2 - 3 working days
Ceresit WhiteTeq Pro Thermal and Sound Insulation Foam is a high-performance insulation foam that offers exceptional thermal insulation and soundproofing capabilities. This water-based, non-toxic, and eco-friendly formula is designed to expand and fill every nook and cranny to create a seamless and ..
£11.27
£13.52 inc VAT
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100mm Isoroc Isofas Mineral Wool Insulation Slab - 1000mm x 600mm (pack of 3)
Guide Price
Brand: Isoroc Model and Size: 1000mm x 600mm - 1.8m2
Delivery Time: 1 - 2 days
100mm Isoroc Isofas Mineral Wool Insulation Slab is a reliable and durable non-flammable insulation solution for universal use. These slabs can be used in external and internal wall insulation as thermal, acoustic and fire insulation. They can be used as a barrier for fire protection...
Guide Price: £41.00
£49.20 inc VAT
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Brand: Kingspan Model and Size: 2400x1200 - 34.56m2
Delivery Time: Pre-Order
25mm Kingspan Kooltherm K107 Pitched Roof Board is the rafter/joist level insulation comprising a premium performance rigid thermoset phenolic insulation core faced on both sides with a low emissivity composite foil facing. Its reflective, low emissivity surface improves the thermal resistance of an..
£467.68
£561.22 inc VAT
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Novia Ultra Plus Roof and Wall Breather 1.5m x 50m Roll - 100GSM
Guide Price
Brand: Novia Model and Size: 1.5m x 50m
Delivery Time: 1 - 2 days
Novia Ultra+ Roof and Wall Breather is an entry-grade, versatile, ultra-low cost 100gsm breather membrane for use in pitched cold and warm roofs, and insulated wall applications. It has good water resistance with high breathability, The membrane is coloured light-grey on one side and white on the ot..
Guide Price: £47.09
£56.51 inc VAT
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Novia Reflex Reflective Roof and Wall Breather 1.5m x 50m Roll
Guide Price
Brand: Novia Model and Size: 1.5m x 50m
Delivery Time: 1 - 2 days
Novia Reflex Reflective Roof and Wall Breather is a strong, lightweight, high quality low cost reflective breather membrane for all pitched cold and warm roofs and insulated wall applications. It can be installed in roofs as an ordinary breather membrane. This membrane can be installed upside down i..
Guide Price: £108.39
£130.07 inc VAT
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Brand: Novia Model and Size: 1m x 50m - 50m2
Delivery Time: 1 - 2 days
Novia Black+ Supreme Roof and Wall Breather Membrane is a 3-layer high performance, lightweight wall breather membrane for pitched cold and warm roofs, and insulated wall applications. Novia Black+ Supreme Roof and Wall Breather Membrane has excellent Class W1 water resistance while providing high b..
£37.66
£45.19 inc VAT
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Novia VariCheck FR Air and Vapour Control Layer - 1.5m x 50m Roll Novia VariCheck FR Air and Vapour Control Layer - 1.5m x 50m Roll
Guide Price
Brand: Novia Model and Size: 1.5m x 50m - 75m2
Delivery Time: 1-3 working days
Novia VariCheck FR is a Class B flame-resistant, variable vapour check barrier. It's specifically designed as an internal Air & Vapour Control Layer (AVCL), complying with BS EN 13984 and carrying a CE mark. This material meets the EN 13501-1 Fire Classification B-s1,d0 standard and is fit for use i..
Guide Price: £127.88
£153.46 inc VAT
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Novia VC2 Air Leakage and Vapour Control Layer 1.5m x 50m Roll
Guide Price
Brand: Novia Model and Size: 1.5m x 50m
Delivery Time: 1 - 2 days
Novia VC2 Air Leakage and Vapour Control Layer is a technologically advanced, flame resistant, reinforced and air-tight vapour check membrane for use as an air leakage barrier and vapour control layer (AVCL) in insulated wall, roof and floor applications. This membrane adds an extra level of safety ..
Guide Price: £76.59
£91.91 inc VAT
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Novia VC8 Reflective Air Leakage and Vapour Control Layer 1.5m x 50m Roll
Guide Price
Brand: Novia Model and Size: 1.5m x 50m
Delivery Time: 1 - 2 days
Novia VC8 Reflective Air Leakage and Vapour Control Layer is a technologically advanced, air-tight vapour check membrane for use as an air leakage barrier and vapour control layer (AVCL) in insulated wall, roof and floor applications. This membrane prevents any surface condensation problems that may..
Guide Price: £70.67
£84.80 inc VAT
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Novia 500G Vapour Control Layer 2.7m x 50m Roll
Guide Price
Brand: Novia Model and Size: 2.7m x 50m
Delivery Time: 1 - 2 days
Novia 500g Vapour Control Layer is a traditional specification, single-ply, non-laminated, virgin grade blown polythene material for use as an air leakage barrier and vapour control layer (AVCL) in insulated wall, roof and floor applications. It is is particularly suitable for use in residential tim..
Guide Price: £70.61
£84.73 inc VAT
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Novia STRP Pro Vapour Control Layer 1.6m x 50m Roll Novia STRP Pro Vapour Control Layer 1.6m x 50m Roll
Guide Price
Brand: Novia Model and Size: 1.6m x 50m
Delivery Time: 1 - 2 days
Novia STRP (Super Tough Reinforced Polythene) Pro Vapour Control Layer is a premium specification reinforced and foil laminated polythene vapour control membrane for use in insulated wall, roof and floor applications. Specially suited for warm flat roofs, where very high concentrations of moisture v..
Guide Price: £168.76
£202.51 inc VAT
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