Hello everyone,
My partner and I are about to sign a contract for a plot of land with a developer. We specifically wanted a watertight concrete structure using waterproof concrete. However, we are having trouble understanding the construction specification. Could someone help us?
FOUNDATION SLAB
A reinforced concrete slab (thickness = 16cm (6.3 inches); steel reinforcement = 10kg/m2 (2.05 lbs/sq ft); concrete grade C25/30) will be constructed as the shallow foundation of the house and will include additional waterproofing against ground moisture according to DIN 18195-4. The flat-rate services from ACD also include a grounding strip made of galvanized steel band and a PE membrane laid as a cleanliness layer beneath the foundation slab. The foundation slab services in accordance with the building specification for the house are excluded.
INTERIOR AND EXTERIOR WALLS
The basement exterior walls exposed to air will be made from aerated concrete blocks, with wall thickness as specified in the drawings. The earth-contacting exterior walls will be constructed with concrete (thickness = 17.5cm (6.9 inches); steel reinforcement = 12kg/m2 (2.45 lbs/sq ft)) and insulated with 6cm (2.4 inches) of perimeter insulation (thermal conductivity class 040). Load-bearing and bracing interior walls will be constructed from aerated concrete blocks in the required thicknesses. Additional reinforcement for bracing the basement exterior walls may be required according to structural calculations. The clear height of the unfinished basement is 2.27 m (7.5 ft).
Waterproofing as specified in point 2
WATERPROOFING OF BASEMENT EXTERIOR WALLS
The exterior waterproofing of the basement walls protects against ground moisture. A drainage board or mat (e.g., Delta MS) safeguards the vertical moisture barrier during backfilling of the basement walls and ensures rapid drainage of water. This mat will be installed by the client as part of the backfilling work. All pipes passing through the basement exterior walls will be sealed. Basement window wells and a drainage system (e.g., drain pipes and flushing shafts) are not included. (Additional costs for waterproofing according to DIN 18533 class W2 or waterproof concrete guidelines may be necessary based on soil reports).
EARTH-CONTACTING EXTERIOR WALLS + EXTERIOR WALL INSULATION
The construction of the earth-contacting exterior walls follows point 1, using concrete. The perimeter insulation specified in point 1 is increased to 10cm (4 inches) (thermal conductivity class 040).
3. Additional waterproofing against hydrostatic pressure
The basement will be constructed with waterproofing against hydrostatic pressure (load case W2.1-E) as specified by the specialist planner. The waterproofing described in point 2 will be omitted.
My partner and I are about to sign a contract for a plot of land with a developer. We specifically wanted a watertight concrete structure using waterproof concrete. However, we are having trouble understanding the construction specification. Could someone help us?
FOUNDATION SLAB
A reinforced concrete slab (thickness = 16cm (6.3 inches); steel reinforcement = 10kg/m2 (2.05 lbs/sq ft); concrete grade C25/30) will be constructed as the shallow foundation of the house and will include additional waterproofing against ground moisture according to DIN 18195-4. The flat-rate services from ACD also include a grounding strip made of galvanized steel band and a PE membrane laid as a cleanliness layer beneath the foundation slab. The foundation slab services in accordance with the building specification for the house are excluded.
INTERIOR AND EXTERIOR WALLS
The basement exterior walls exposed to air will be made from aerated concrete blocks, with wall thickness as specified in the drawings. The earth-contacting exterior walls will be constructed with concrete (thickness = 17.5cm (6.9 inches); steel reinforcement = 12kg/m2 (2.45 lbs/sq ft)) and insulated with 6cm (2.4 inches) of perimeter insulation (thermal conductivity class 040). Load-bearing and bracing interior walls will be constructed from aerated concrete blocks in the required thicknesses. Additional reinforcement for bracing the basement exterior walls may be required according to structural calculations. The clear height of the unfinished basement is 2.27 m (7.5 ft).
Waterproofing as specified in point 2
WATERPROOFING OF BASEMENT EXTERIOR WALLS
The exterior waterproofing of the basement walls protects against ground moisture. A drainage board or mat (e.g., Delta MS) safeguards the vertical moisture barrier during backfilling of the basement walls and ensures rapid drainage of water. This mat will be installed by the client as part of the backfilling work. All pipes passing through the basement exterior walls will be sealed. Basement window wells and a drainage system (e.g., drain pipes and flushing shafts) are not included. (Additional costs for waterproofing according to DIN 18533 class W2 or waterproof concrete guidelines may be necessary based on soil reports).
EARTH-CONTACTING EXTERIOR WALLS + EXTERIOR WALL INSULATION
The construction of the earth-contacting exterior walls follows point 1, using concrete. The perimeter insulation specified in point 1 is increased to 10cm (4 inches) (thermal conductivity class 040).
3. Additional waterproofing against hydrostatic pressure
The basement will be constructed with waterproofing against hydrostatic pressure (load case W2.1-E) as specified by the specialist planner. The waterproofing described in point 2 will be omitted.
Z
zaubermaus8424 Oct 2018 14:02How should the description be worded to avoid any misunderstandings? Is it sufficient to simply state that it complies with WU guidelines?
Z
zaubermaus8424 Oct 2018 16:02Can no one provide me with a description for this???