IKO Hyload Insulated DPC combines a polymeric damp proof course with bonded insulation to prevent cold bridging at wall junctions. BBA approved, CFC and HCFC free, and suitable for 100mm and 140mm blockwork. Available in multiple standard sizes.
Size
Price
QTY
165mm x 8m
£27.85£33.42
180mm x 8m
£31.85£38.22
225mm x 8m
£41.95£50.34
The IKO Hyload Insulated DPC is a two-in-one product that handles damp exclusion and thermal bridging in one strip. It combines a flexible polymeric DPC with a bonded insulation layer, designed specifically for use at wall junctions, cavity closers, and below-threshold details where a standard polythene DPC would leave a thermal weak point. If you have ever had an energy assessor flag cold bridging at lintel or sill level, this is the product that addresses it properly.
Standard polythene DPC does the waterproofing job well enough, but it offers nothing in terms of thermal resistance. Where a cavity wall closes around an opening or at a floor-to-wall junction, that gap in the insulation line becomes a path for heat loss and, in some climates, condensation. The IKO Hyload Insulated DPC closes both issues in one installation step.
Where IKO Hyload Insulated DPC Meets Building Regulations
This product conforms to Approved Document L, and is also aligned with NHBC and BRE guidelines on thermal insulation and avoiding risks. The BBA Certificate No. 97/3310 is worth noting if you are working on a warranty-backed new build or a project where sign-off paperwork matters. It is the kind of certification that saves time on site when the inspector turns up with questions.
The insulation material itself will not crack when bent around corners or profiles, which matters on site where DPC rarely gets installed under ideal conditions. The standard sizes cover both 100mm and 140mm blockwork without needing to order bespoke. For non-standard details or unusual cavity widths, bespoke sizing is available — worth a call if you are specifying rather than reacting.
Three standard widths are available: 165mm, 180mm, and 225mm, each supplied in 8m rolls. The product is CFC and HCFC free, which ticks the box for environmentally sensitive specifications.
Pro Tip: When installing around window or door reveals, pre-bend the IKO Hyload Insulated DPC against a straight edge before fitting rather than trying to work it in place, as the insulation layer holds its shape better when creased deliberately than when forced cold into tight corners.
IKO Hyload Insulated DPC is used primarily in new-build masonry construction wherever a cavity wall closes around an opening or at a structural junction. Typical locations include window and door reveals, below-DPC level at floor junctions, and at lintel and sill positions where the cavity insulation line would otherwise be broken. It is also used in renovation projects where thermal performance is being upgraded alongside damp proofing works.
Bricklayers, groundworkers, and specialist damp proofing contractors all handle this product regularly. It is particularly common on new housing developments and commercial buildings where both thermal compliance and long-term weatherproofing are specified from the outset.
Best For
Window and door reveal closures
Cavity wall junction details
Below-threshold DPC positions
Lintel and sill thermal bridging prevention
New-build masonry construction
Thermal upgrade refurbishment work
Compatible With
100mm blockwork
140mm blockwork
Standard masonry cavity wall construction
Timber frame with masonry outer leaf
Bespoke sizes available on request
Key Properties
BBA approved, Certificate No. 97/3310
Conforms to Approved Document L
Meets NHBC and BRE thermal insulation guidelines
Flexible, will not crack when bent
CFC and HCFC free
Polymeric DPC bonded to insulation layer
Superior thermal resistance versus standard polythene DPC
Not suitable for: Not suitable as a standalone horizontal DPC in high hydrostatic pressure situations where a heavier-duty tanking system is required. Not intended for use in below-ground tanking applications.
Installation follows standard DPC practice, with the insulation face positioned toward the cavity or the interior side depending on the detail being formed. The strip should be laid continuously without gaps, lapped at joints by a minimum of 100mm, and dressed into the cavity or over the wall face as the masonry is built up. Mortar joints either side should fully bed the DPC edge to prevent water tracking beneath it.
For reveal and jamb details, pre-bend the strip before installation to avoid stress cracking at corners. On timber-framed buildings with a masonry outer leaf, ensure the insulation layer aligns with the frame insulation line to maintain continuity across the thermal envelope.
Check the installation detail and confirm which width is required for the cavity and blockwork dimensions on site
Cut the roll to the required length using a sharp knife or scissors, allowing for laps at joints
Pre-bend the strip at any corners or angles against a straight edge before offering it into position
Lay the DPC continuously across the full width of the wall, insulation layer facing the cavity or interior as specified
Lap joints by a minimum of 100mm and ensure laps are sealed or dressed down to prevent water ingress
Bed both edges into mortar as the blockwork is built up, avoiding voids beneath the DPC strip
Check alignment with the surrounding insulation line to maintain a continuous thermal envelope across the detail
What is the difference between the IKO Hyload Insulated DPC and a standard polythene DPC?
A standard polythene DPC provides a water barrier but has no meaningful thermal resistance. The Hyload Insulated DPC adds a bonded insulation layer which prevents cold bridging at wall junctions and openings. This makes it compliant with Approved Document L requirements in locations where thermal continuity matters, not just moisture exclusion.
Which sizes are available and will they fit standard blockwork?
The standard sizes are 165mm, 180mm, and 225mm, all supplied in 8m rolls. These widths are designed to suit both 100mm and 140mm blockwork without modification. If your project requires a non-standard width, bespoke sizing is available — contact us directly for lead times and pricing.
Is the IKO Hyload Insulated DPC accepted by NHBC and building inspectors?
Yes. It holds BBA approval under Certificate No. 97/3310 and conforms to Approved Document L, as well as NHBC and BRE guidelines on thermal insulation. For warranty-backed new builds or projects requiring formal sign-off, this documentation is already in place and can be referenced during inspections.
The IKO Hyload Insulated DPC consists of a polymeric damp proof course strip bonded to a layer of rigid insulation material. The insulation component is CFC and HCFC free and retains flexibility sufficient to be bent around corners without cracking. The product holds BBA Certificate No. 97/3310 and is manufactured in compliance with Approved Document L thermal performance requirements and BRE guidance on avoiding thermal bridging risks in masonry construction.
Reviews
There are no reviews yet.