CLOSED CELL POLYURETHANE SPRAYED FOAM
This is applied directly to the underside of tiles and slates or to underfelts within domestic pitched roofs. It can be used to stabilise failing roof coverings e.g. nail fatigue. It has a minimal value for improving the thermal performance of the building. It is usually applied as a relatively thin layer of approximately 20-40mm. It has some vapour permeability but vapour transfer through the material is typically quite low. It has very strong adhesive properties, bonds strongly to substrate, is relatively dimensionally strong and resists compression. The product is essentially waterproof resisting the passage of free water. When used to stabilise failing roof coverings it should be applied to a “dry” (leak-free) and defect free roof. The use of adhesive PU foams may work to delay the inevitable renewal of roof coverings. Sadly it may render roof coverings (slate, tile and stone) unrecyclable. Foam removed from roof coverings presents a waste disposal / recycling problem at the point when roof renewal is inevitably needed. The presence of sprayed foam means that simple visual inspections to establish the condition of roof timbers is impossible. Investigations performed to establish the condition of roof timbers will be difficult and limited. Where evidence of roof leaks, timber decay or insect infestations are identified, the full extent of the problem and the extent of any repairs, treatment and drying can only be undertaken if the foam is removed. Where timber decay or insect attack is discovered, or is suspected, in a roof that has been coated in closed cell foam that has been applied directly to the roof coverings, it is likely that this will result in the full strip and recover of the roof as the foam will be extremely difficult to remove from localised areas. The need to remove well bonded high-density foam from tiles, slate and stone will probably prevent their reuse.
OPEN CELL SPRAYED POLYURETHANE FOAM INSULATION
This is used to improve the thermal performance of the building, and is applied to a thickness of 100-150mm. It is relatively soft, easy to squish, and can push a probe into it easily. It has a varying degree of vapour permeability, and may be applied to roofs with vapour permeable and non-permeable underfelts. There is however some risk of vapour transfer. Hydrothermal modelling is needed to confirm that condensation risk is managed. It can be made wet but will not significantly restrict the passage of free water. This product is usually adequately vapour permeable and will allow vapour transfer. Open cell spray foam is not recommended for applications directly to the underside of tiles, slates or other domestic roof coverings. This foam should only ever be applied to the underside of felt. Note - Problems could occur if open cell foam is applied to underlays that are not vapour permeable. The inappropriate use of reinforced, highly vapour resistant plastic underlays was relatively common where roofs were being replaced during the 1960’s to 1990’s. Open celled PU foams are relatively dimensionally weak and although they bond to substrates effectively and hold their shape permanently, they have little or no value as an adhesive or bonding agent. Hence, they are not commonly, or correctly, used for stabilising failing roof coverings. Vapour conductivity of ceiling, occupation level and the ventilation regime in the occupied parts of the house affect condensation risk. A vapour control layer (VCL) may sometimes be needed (recommended after a hydrothermal evaluation) on the warm side of open cell spray foam insulation. This is required if there is a risk of interstitial condensation. The presence of sprayed foam means that a simple visual inspection to establish the condition of roof timbers is impossible. Investigations performed to establish the condition of roof timbers will be difficult and limited. Where evidence of roof leaks, timber decay or insect infestations are identified, the full extent of the problem and the extent of any repairs, treatment and drying can only be undertaken if the foam is removed.
Diall Insulation Roll
An eco-friendly alternative to traditional glass wool insulation, this recycled plastic insulation from Diall is comfortable to work with and is completely itch free. It is extremely easy to lay and comes in handy sized rolls to fit many existing rafter spaces.
- Easy to tear allowing it to be inserted into a variety of cavity spaces
- Each roll is made from approx. 85 recycled plastic bottles
- Requires no protective equipment to work with
- Breathable
| Product Specification | (L)6m (W)0.37m (T)100mm |
|---|---|
| Product Weight | 370mm |
| Material | Polyester |
Diall Reflective Bubble Insulation Roll
This multi-use insulation is ideal for replacing existing insulation or adding to new buildings that require insulation with a certified thermal performance. It can be used on roofs, walls, floors, in outbuildings and garages or in vans, mobile homes and caravans.
- Made from 2x layers of aluminium lacquered with anti-oxidation treatment and 2x layers of bubbled polyethylene
- Can also be used as radiator reflecting foil or to insulate exposed pipework
- Lightweight to enable easy transportation and installation
- Can be cut to the required size using basic tools
- Hypoallergenic & non-itch
- Fixings sold separately
| Brand | Diall |
|---|---|
| Coverage | 16.8m2 |
| Product Length | 14m |
| Product Width | 1200mm |
| Product Thickness | 7mm |
|---|---|
| Material | Polyethylene |
| Range | Reflective |
TLX Silver Thinsulex Multifoil Roofing Insulation Vapour Barrier - 1.2M X 10M Roll
TLX Silver is a thin, flexible, multi-purpose insulation. The original BBA certified multi-foil by Web Dynamics which saves time and guarantees 0.18. It stops air leakage by providing an air-tight vapour barrier and restricting air movement in its multi-foil layers.
TLX Silver can be used in loft conversions, new build roofs and walls
Loft Conversions
TLX Silver U = 0.18 solutions are covered by LABC Registered Details meaning TLX Silver is accepted by Building Control bodies. It is light weight and flexible, making it quick and easy to install. TLX Silver can also be used in dwarf walls, dormer cheeks and flat roofs. TLX Silver works in combination with glass wool to reduce the total thickness of insulation needed and with rigid insulation to cut installation time.
New Build Roofs
TLX Silver is fitted below rafters of any depth to improve thermal performance. It is a vapour barrier and stops water vapour from entering the roof structure, preventing condensation. With a BBA certificate it is accepted by NHBC. TLX Silver is light weight, flexible and easy to fit, requiring no protective clothing.
Walls
TLX Silver is BBA certified to internally insulate new timber frame or existing masonry walls. It wraps around junctions and details to give low air leakage and to reduce thermal bridging at the floor and around windows and doors. In new walls it reduces the depth of stud needed, and prevents water vapour from entering the wall structure.
Application
Can be used for 100mm and 150mm rafter installations in new build, barn conversion and refurbishment projects including loft extensions (new build in a traditional roof) either over or under rafters. It works in combination with glass wool to reduce the total thickness of insulation needed and with rigid insulation to cut installation time. BBA approved, TLX Silver saves time and guarantees 0.18. It stops air leakage by providing an air-tight vapour barrier and restricting air movement in its multi-foil layers.
| Length | 10m |
|---|---|
| Width | 1.2m |
| Thickness | 30mm |
| Roll Size | 12m2 |
| Roll Weight | 8Kg |
|---|---|
| Thermal Resistance | 0.91m2K/W |
| Emissivity | 0.05 |
| Vapour Barrier | 1200 MNs/g |
TLX Gold Thinsulex Multifoil Insualtion & Breather Felt
TLX Gold multifoil insulation from Web Dynamics is a 2 in 1 insulating breather membrane, venting moisture like a breather membrane, whilst insulating like non-breathable PIR board. This improves the thermal performance of a roof without concern of condensation or having to adjust the height of the roof. TLX Gold has been designed for today’s roofer. Whether it’s a roof refurbishment or new build project it improves thermal performance and eliminates the risk of condensation, it vents moisture like a breather membrane and yet insulates like non-breathable PIR board. TLX Gold is Sd intelligent (the more moisture, the more it breathes) which is why there’s no condensation risk, even without a vapour barrier. The TLX Gold product is lightweight, quick and easy to fit, comes with European technical approval and is endorsed by LABC. TLX gold can be used in historic buildings and public buildings, re-roofing social and private housing, barn coversions, new builds and extensions
Historic & Public Buildings
Gold has been successfully fitted to many listed and historic buildings, especially where the roofline cannot be altered. Installed above rafters when re-roofing, it immediately makes the roof watertight. TLX Gold is water vapour permeable, allowing the building to breathe naturally, with no risk of condensation.
Re-Roofing Social & Private Housing
TLX Gold is installed above rafters without encroaching into internal space, and with no need to access the house. It significantly improves energy performance of the roof, although additional insulation can be added for even lower U values. TLX Gold is fast and easy to install, without any need for protective clothing.
Barn Conversions
TLX Gold is ideal where the barn has vaulted ceilings or exposed rafters. The roof is air and water tight, yet breathable, maintaining a comfortable environment inside the barn. Approved solutions and technical support are available.
New Build & Extensions
TLX Gold is combined with rigid or fibrous insulation to give the low U values and air leakage to satisfy SAP requirements. It eliminates the need for a roofing underlay, and the requirement to fit rigid insulation below rafters.
| Length | 10m |
|---|---|
| Width | 1.2m |
| Thickness | 33mm |
| Layers | 7x layers |
| Roll Size | 12m2 |
| Roll Weight | 11Kg |
|---|---|
| Thermal Resistance | 0.85m2K/W |
| Emissivity | 0.16 |
| Vapour Barrier | 0.50 MNs/g |
50MM - TR26 Flat Roof Insulation Board By Kingspan Thermaroof 150MM - 5.76M2 Pack
This 150mm thick Kingspan Thermaroof TR26 is insulation for flat roofs waterproofed with mechanically fixed single-ply waterproofing. The high performance, fibre free, rigid thermoset insulation core is faced on both sides with a low emissivity composite foil facing which is used for insulating flat roofs and is fully compatible with most mechanically fixed single-ply waterproofing systems and most green roof systems.
- Fully compatible with most mechanically fixed single-ply waterproofing systems
- Compatible with most green roof systems
- Installation technique is ideal for fast track building programmes
- Resistant to the passage of water vapour
- Easy to handle
- Easy to install
- Ideal for new build and refurbishment projects
- Non-deleterious material
- Manufactured with a blowing agent that has zero ODP and low GWP Insulation.
| Brand | Kingspan |
|---|---|
| Length | 2400mm |
| Thickness | 150mm |
| Width | 1200mm |
| Thermal Conductivity | 0.022 W/mK |
| Edging | Square Edge |
|---|---|
| Facing | Foil Composite Foil |
| Product Type | Board |
| Material | PIR |
| Pack Size | Pack of 2 |
