Stormpan 44
Neutral, gently curved tile with a traditional shape. Wide range of fittings, removable and reusable. With a standard underlay, a minimum of 22°.
- Pieces per m²
- ± 20,7
- Minimum pitch with Fleece Premium
- 15°
Roofs / Clay roof tiles
Roofs · pitched roofs Clay roof tiles
Renovating a pitched roof is more than laying new tiles. We renew the whole roof — structure, insulation, waterproofing and finish — so it lasts for decades again.
- 10 modelsKoramic and Wienerberger
- From 10°roof pitch, depending on model and underlay
- 20 yearswarranty on our work
What a roof renovation involves First look, then choose.
During the site visit we inspect the roof structure, the underlay, the insulation, the rainwater drainage and the connections. Only then do we choose the build-up.
Gutters, roof windows and the connections to the chimney and façade are finished in the same job.
- Structure, insulation, waterproofing and finish
- Gutters and roof windows in the same job
- One fixed point of contact
Clay roof tiles · Stormpan 44Koramic · Wienerberger From the classic wave to the clean flat line.
A good roof keeps the rain out and the heat in, and shapes how your home looks. Pick a model and see the tile and the roof — ten models from the Koramic and Wienerberger range.
Datura
Flat tile for a clean pattern on roof and façade. Five colours, also in matt glaze.
- Colours, also matt glazed
- 5
- Adjustable top interlock
- 37 mm
Nueva
Modern flat model with double side interlock and a wide top interlock — calm and quick to lay.
- Hanging nibs for stable fixing
- 2
- Side interlock, adjustable batten gauge
- 2×
OVH Klassiek
Classic wavy tile with a recognisable silhouette, in blue-grey, black and natural shades.
- Colour families: blue-grey, black, natural
- 3
- Hanging nibs, wide range of fittings
- 2
VHV Vario
Traditional character with modern fitting precision. Natural, engobe and glazed colours.
- Guaranteed side tolerance
- 6 mm
- Adjustable top interlock
- 20 mm
Standard
Historic model with ribs and interlocks. Straight or diagonal laying, in three colours.
- Pieces per m²
- ± 14,2
- Minimum pitch with Fleece Premium
- 15°
Oude Pottelbergse 451
Pantile with a historic silhouette and contemporary quality. In natural red, rustic and weathered Vieilli.
- Pieces per m²
- ± 18,6
- Minimum pitch with Fleece Premium
- 15°
Tegelpan Elfino
Flat extruded clay tile with a continuous bonding rib: an ultra-fine, contemporary look on roof and façade alike.
- Pieces per m², depending on batten gauge
- ± 28–30,2
- Minimum pitch with Fleece Premium
- 15°
Jura Nova
Large tile with a gentle wave, double side interlock and a flat trough — a clean character on large roof surfaces.
- Pieces per m²
- ± 9,7–11,3
- Minimum pitch with Fleece Premium
- 15°
Tradiva
Light tile with a gentle wave, deep interlocks and adjustable batten gauge — versatile, with a timeless wave line.
- Pieces per m²
- ± 12,5–14,1
- Minimum pitch with Fleece Plus (batten gauge 340 mm)
- 10°
The build-up Warmth, dryness and ventilation — in the right order.
A fully renovated pitched roof consists of four layers, in this order:
- 01Roof covering
Roof tiles or slates
- 02Underlay
Water and wind barrier, vapour-open — with counter battens and tile battens
- 03Insulation layer
PIR, glass wool or stone wool — according to height and substrate
- 04Vapour control layer
On the inside, limits moisture penetration from inside
Minimum roof pitch The pitch determines which tile and which underlay are possible.
Some guide values from the manufacturer:
- ✓
Stormpan 44: from 22° with a standard underlay, from 15° with Fleece Premium.
- ✓
Standard, Oude Pottelbergse 451, Tegelpan Elfino and Jura Nova: from 15° with Fleece Premium.
- ✓
Tradiva: from 10° with Fleece Plus (batten gauge 340 mm).
- ✓
The final choice follows the manufacturer's technical documentation and the condition of your roof.
Projects Pitched roofs we renovated.
From a terraced house in Niel to 230 m² of natural slate in Andenne.
26cities in 6 provinces
from Bruges to Namur
The roof defines the look One tile, a different house.
The colour and profile of the tile change the whole silhouette of the home — from a classic wave to a clean, contemporary plane.
Grants and financing
We check what you are entitled to.
Since 2026, roof insulation in Flanders only qualifies for Mijn VerbouwPremie in income categories 3 and 4. We check your situation, help with the application and, if you wish, arrange a renovation loan through KBC.
Questions about pitched roofs What our clients ask us.
How long does a roof renovation take?
That depends on the surface area and the build-up. In Andenne we renewed a 230 m² natural slate roof with 12 cm of PIR insulation and new VELUX roof windows in two weeks.
What is the minimum pitch for clay roof tiles?
For most Koramic models 15° with Fleece Premium as underlay. The Tradiva can go from 10° with Fleece Plus. With a standard underlay, the Stormpan 44 starts at 22°.
Which insulation should I choose under the roof tiles?
PIR/PUR insulates best at a small thickness (λ 0.022–0.025), glass wool is good for acoustics between the rafters (λ 0.030–0.040) and stone wool is more fire-resistant (λ 0.032–0.040). With little height, we combine PIR with glass wool.
Can I get a grant for roof insulation?
In Flanders, since 2026 roof insulation only qualifies for the Mijn VerbouwPremie grant in income categories 3 and 4. We review your situation and help with the application.
What warranty does Grava Group give?
We give a 20-year warranty on our work, in black and white in your quote.
Free site visit · quote within 48 hours Ready for
a new roof?
Our specialist inspects your roof and sends you a tailored, no-obligation quote within 48 hours.
- Phone
- +32 333 20 630
- leads@gravagroup.be
- Address
- Sneeuwbeslaan 14, 2610 Wilrijk
Free 3D visualisation with your quote