System 10 in action

How the complete system works

Heat moves in three ways. Conventional insulation addresses only one of them. System 10 controls all three — which is why it performs at far smaller thicknesses.

01 · Radiation

Heat that radiates through air

In summer, the sun heats the roof covering and infrared radiation passes straight into the attic. Fibrous insulation barely slows it down — which is why attics overheat.

System 10 reflects 95% through its pure-aluminium layers: Roof Pro on the outside, Gold and Multistrat on the inside send radiation back.

02 · Conduction

Heat that travels through the material

Heat migrates through the mass of the insulation, from the warm side to the cold side. The lower the conductivity (λ), the better the material insulates.

Wolle (λ 0.035–0.038) slows conduction through its hydrophobic synthetic fibre — without settling and without losing performance over time.

03 · Convection

Heat carried by air movement

Moving air carries heat and moisture through gaps and unsealed layers. This is also where condensation starts — warm vapour meeting a cold surface.

The sealed air layer between membranes (min. 3 cm) blocks convection, while the membranes act as a vapour barrier — no condensation inside the structure.

The 5 components are not separate materials but an integrated system: each addresses a different heat-transfer mechanism. Together they reach an R-value that conventional insulation only achieves at 2–3× the thickness.

Technical architecture

The 5 components of System 10

Each component addresses a specific heat-transfer mechanism. Together they form one complete system — not a collection of unrelated materials.

Available configurations

6 System 10 packages

From Basic to Premium+. Select your package and thickness, then request your quote — reply within 24 hours.

Not sure which package fits your project?

Pick a priority for our tailored recommendation →

Energy & space calculator · 63 EU cities · HDD + CDD

How much you save — energy, money and space

Pick your package, climate and current situation. The calculator compares System 10 against conventional insulation of equal thickness, estimates payback, and quantifies the floor space and room volume you recover thanks to the slimmer build-up. Every assumption is stated — check them.

Application

Roof application: all 6 packages available.

System 10 package

WOLLE thickness

Exterior membrane (optional)

Roof Pro / Eco are optional add-ons for Basic and Medium — Premium packages already include Roof Pro.

Compare with conventional insulation

Climate zone

Surface area

m²

Energy price

€/kWh

Current roof condition (payback baseline)

Payback is computed against the condition you select — not against a worst case we picked for you.

Roof pitch

Eaves / knee-wall length

m

Local price of usable floor space

€/m²

Enter the market price per m² of finished usable space in your project's area — it converts the centimetres you save into money.

Heating system

Cooling / AC

Operating regime

—

Energy saved vs conventional insulation of equal thickness

— kWh/m²·yr

System 10 · heating

—

System 10 · cooling

—

System 10 · total

—

Conventional · heating

—

Conventional · cooling

—

Conventional · total

—

Your yearly saving

—

kWh/yr

In money

—

€/yr

System R-value

—

m²·K/W certified

Payback · vs your current roof condition

Material investment

— €

Saving vs current

— €/yr

Pays for itself in

— yrs

Material cost only — installation not included.

Space recovered · slimmer build-up, same R-value

Thickness saved

—

vs equal-R conventional

Usable floor gained

—

m²

Room volume gained

—

m³ · daily comfort

Value of recovered space at your local price

— €

Payback incl. space value

— yrs

Volume is not priced separately (it is already reflected in floor area) — but more air volume means better daily comfort and indoor-air quality at the same ventilation rate.

—

All packages

Package	R m²·K/W	kWh/m²·yr	Saving kWh/m²	Price €/m²	Investment €	Payback yrs		Space value €

Assumptions, stated in full: energy demand Q = HDD(CDD) × 24 × regime / R / 1000 / COP, per m² of envelope. Conventional insulation between rafters is penalised 30% for repetitive timber thermal bridging (rafters at 60–80 cm); System 10 R-values are certified for the full build-up including reflective membranes and sealed air layer. Equal-performance conventional thickness: t = λ_ref × (R_S10/0.70 − 0.17). System 10 build-up depth = WOLLE thickness + 6 cm (membranes, sealed air layer, battens). Floor-space gain — walls: (wall area ÷ 2.65 m usable height) × thickness saved; pitched roofs: a strip of width Δt ÷ sin(pitch) along the eaves length you enter. Prices are material only, incl. VAT; installation excluded. Climate data: heating/cooling degree days, base 18°C, long-term averages. This is an engineering estimate, not an energy audit — request a free assessment for a project-specific calculation.

Building physics · Condensation & dew point

Where does condensation form in a roof?

Condensation forms wherever the temperature inside the build-up drops below the dew point. The diagram below shows how temperature varies through the insulation thickness and where moisture risk appears — for each insulation type and structure (timber or steel).

Insulation system

Material between rafters

Insulation thickness between rafters

Load-bearing structure

Structure fraction in the field

Interior temperature

°C

Interior relative humidity

% RH

Exterior temperature

°C

WOLLE 15 cm · timber structure · interior 20°C / 60% RH

Field temperature (insulation)

Temperature at thermal bridge

Dew point (condensation threshold)

Dew point

—

Min. temp. at bridge

—

Effective R (with bridge)

—

Loss through bridging

—

Material comparison between rafters (at the selected system and conditions)

Insulation	Effective R	Surface temp.	Dew point	Margin	Condensation risk

Methodology: the dew point is computed with the Magnus formula from interior temperature and humidity. Temperature through the build-up drops in proportion to the thermal resistance traversed (EN ISO 13788). The comparison is at complete-system level, not fibre level: System 10 stops vapour on the interior side through its reflective membranes (sealed vapour barrier), so the structure and the insulation mass stay dry. Conventional systems without a proper barrier let vapour migrate toward the cold face, where — at rafter thermal bridges (timber λ=0.13, steel λ=50) — temperature drops below the dew point and condensation forms. PUR foam is itself a barrier, but cannot be dismantled. Indicative values ±10%.

All packages · 15 cm Wolle

Full comparison

Green = top performance · Highlight = lowest price. All at the standard 15 cm Wolle thickness.

Quantity calculator

Bill of materials

Choose the system, thickness and surface — we calculate exactly how many rolls and packs you need, in whole packaging units. Send the list and receive your final quote.

Insulation system

Wolle thickness

Surface to insulate (m²)

Happy customers

What people who chose System 10 say

Reviews from Isoflect customers in Romania, translated from Romanian.

★★★★★

"I used a large part of their range — from the Isoflect Gold membrane to wall insulation and acoustic insulation for timber and concrete floors. Products I am extremely happy with. All of them went into an A-frame house."

GB

Gabi B.

A-frame house · System 10 Premium

Verified

★★★★★

"If you are looking for insulation, I can honestly say you can order from this team. I found the most efficient solution both thermally and financially! Very professional on WhatsApp — quick replies and clear advice."

VI

Vlase I.

Attic · System 10 Medium

Verified

★★★★★

"I used Floor Pro under my underfloor heating and I am extremely happy with the efficiency. A small investment for a big return. I fully recommend the Isoflect team."

CS

Cosmin S.

Floor · Floor Pro

Verified

Frequently asked questions