Sandstone Window Sills | Tested · 2024 |
| Failure Mode | Visual Indication | Primary Cause | |--------------|-------------------|----------------| | Laminar spalling | Detachment of thin sheets parallel to bedding | Expansion from iron pyrite oxidation (rust bursting) | | Edge crumbling | Rounded, granular loss on front edge and drip groove | Freeze-thaw + salt action | | Mid-span cracking | Vertical or diagonal hairline crack | Overload or insufficient bearing (lack of support beneath) | | Under-side bowing | Downward sag visible from below, often with tensile cracks | Long-term creep under sustained load + wetting/drying cycles | When specifying a window sill, sandstone competes with several substitutes:
| Material | Advantages vs. Sandstone | Disadvantages vs. Sandstone | |----------|--------------------------|-------------------------------| | Cast stone | Uniform properties, lower cost, no bedding-plane weakness | Artificial appearance, higher thermal movement, less repairable | | Limestone | Easier to cut, consistent color | Lower acid resistance, often weaker in thin sections | | Granite | Extremely durable, zero porosity | High cost, difficult to carve, very dark color absorbs heat | | Precast concrete | Any shape/color, reinforced possible | Cracking from steel corrosion, efflorescence, carbonation | | Fiber-cement | Lightweight, low maintenance | Lacks mass, feels hollow, limited historic authenticity | sandstone window sills
Sehr geehrte Kunden,
In den letzen Wochen und Monaten haben sich die Rahmenbedingungen in China und auch
weltweit so zum Negativen entwickelt, dass wir uns nicht mehr in der Lage sehen,
Endkunden zu bedienen. Die Verfügbarkeit von Ware ist schlecht und kaum zu prognostizieren,
viele wichtige Hersteller verkaufen Ihre Produkte nur noch selbst und verbieten uns daher
den Verkauf auf unserer Website, der Versand ist extrem teuer geworden,
die damit verbundenen Regularien (Markengeräte können oft gar nicht mehr verschickt werden,
Akkus sind ein Problem, etc.) so streng, dass wir bei großen Teilen des Sortiments Schwierigkeiten haben,
diese überhaupt in annehmbarer Zeit und sicher an unsere Kunden ausliefern zu können.
Wir haben uns daher nach über 15 Jahren schweren Herzens dazu entschließen müssen,
ab sofort nur noch Großbestellungen für Wiederverkäufer abzuwickeln.
Danke für Ihr Verständnis und alles Gute
Das CECT Shop Team
| Failure Mode | Visual Indication | Primary Cause | |--------------|-------------------|----------------| | Laminar spalling | Detachment of thin sheets parallel to bedding | Expansion from iron pyrite oxidation (rust bursting) | | Edge crumbling | Rounded, granular loss on front edge and drip groove | Freeze-thaw + salt action | | Mid-span cracking | Vertical or diagonal hairline crack | Overload or insufficient bearing (lack of support beneath) | | Under-side bowing | Downward sag visible from below, often with tensile cracks | Long-term creep under sustained load + wetting/drying cycles | When specifying a window sill, sandstone competes with several substitutes:
| Material | Advantages vs. Sandstone | Disadvantages vs. Sandstone | |----------|--------------------------|-------------------------------| | Cast stone | Uniform properties, lower cost, no bedding-plane weakness | Artificial appearance, higher thermal movement, less repairable | | Limestone | Easier to cut, consistent color | Lower acid resistance, often weaker in thin sections | | Granite | Extremely durable, zero porosity | High cost, difficult to carve, very dark color absorbs heat | | Precast concrete | Any shape/color, reinforced possible | Cracking from steel corrosion, efflorescence, carbonation | | Fiber-cement | Lightweight, low maintenance | Lacks mass, feels hollow, limited historic authenticity |