RoofHannoverAugust 2024

Complete roof renovation of a Hannover single-family house

New clay tiles, 24 cm between-rafter insulation, underlay. Roof U-value now 0.15 W/(m²·K).

About this project

The roof renovation in Hannover covered full re-roofing, energy insulation and integration of modern roof windows. VL-Innovativbau works with Velux and Fakro — both manufacturers offer 15-year warranty. The old roof was removed, rafters checked for load-bearing capacity and reinforced if needed. Then came the under-roof membrane, counter-battens, 24 cm intermediate insulation WLG 035, and new cover. All joints, valleys and edges were finished in titanium zinc. The two Velux residential roof windows were installed with flashings for easy maintenance. Static and energy compliance reports per GEG were provided.

Brief

Steep 45° roof pitch, autumn weather changes — short dry windows for each roofing section.

Solution

Section-by-section roofing with daily emergency weather covers, 4 men + safety harness anchor system. Hourly weather forecast updates.

Technical data

U-value
0,16 W/(m²·K)
Insulation thickness
24 cm
Material
Ton / Trapezblech
Warranty
15 Jahre
Wind-load zone
Zone 2
Project duration5 Wochen

Materials & manufacturers

  • Tondachziegel oder Trapezblech
  • Unterspannbahn diffusionsoffen
  • Dämmung 24 cm Steinwolle WLG 035
  • Konterlattung 4 cm Belüftung
  • Velux / Fakro Dachfenster
  • Titanzink-Anschlüsse

Related projects