真的豪宅应当看屋面 

[quote="tjedi"]真的豪宅应当看屋面,这处还在施工的房屋用的是real slate。仅一个roofer在施工。目前bc仅有的几个slate roofer之一。他来自德国,小时收费是$275(只是工钱,材料未记)。
德国的SLATE是完全手工打制,在屋顶上铺出鱼鳞一样的效果。美加是机器切割,钉在屋顶,价格要较德国便宜一些.(吐舌,加拿大的价格就可以了,德国的不知得多少?)不过他给我看的德国屋顶的照片可看出德国工匠的匠心-简直是工艺品。

和这位老兄聊了几句,他竟递给我一叠名片,(新移民,刚来两个月,想要有多一些的活,可理解)BY THE WAY, 需要他的联系电话的,给我短信了。



在温哥华这个地区用德国slate不是个好选择。


Material standards for roofing slate

There are two main standards for roofing slate: The EN DIN 12326 und the ASTM which will be introduced here.

If one compares both it becomes obvious that the EN 12326 comprises considerably more investigations and tests to classify a roofing slate. The investigatons of the petrography, mineralogy and fabric are not included in the ASTM. Furthermore, no test for freeze-thaw resistance has to be carried out in the ASTM.

The assessment of the service life within the ASTM C 406 seems to me a kind of simplifying because processes of weathering and the corresponding behaviour of the rocks - no matter if slate or any other rock - is very complex. Due to this, its hard to make statements about service life only based of tests in the laboratory.

In my opinion the EN 12326 leads to more informationen of the properties of a (roofing-) slate and should be therefore preferred.


ASTM C 406 - Standard Specification for Slate

This specification describes the material properties and physical requirements as well as the ways of sampling and testing. The following terms are defined:

service life: the period of time over which it is expected that no replacement or repair is necessary due to weathering.
ribbons: Narrow bands of carbonaceous material whch are darker in colour than the surrounding slate. Ribbons are supose to be inclusions of the original beds and are expected to be softer and less durable the the surrounding slate.

The classification of the roofing slates is as follows:

classification	min. Breaking Load
[lb oder N]	max. Absorption
[%]	max Depth

of Softening [in o. mm]

Grade S1	575/2558	0.25	0.002/0.05
Grade S2	575/2558	0.36	0.008/0.20
Grade S3	575/2558	0.45	0.014/0.36

The standard states that when comparing slate of same grade and equal thickness but from different sources, slates which meet the required breaking load at the lowest specimen thickness will yield the best performance.

The expected service life of roofing slates of different grades can vary, depending on the location and different environments and is as follows:

classification	Service Life (years)
Grade S1	over 75
Grade S2	40 to 75
Grade S3	20 to 40

Furthermore, statements about the appearance has to given:

The commercial colour should be preceded by the words:
"unfading" = colour doesn't alter
"semi-weathering" = little alteration due to weathering
"weathering" = alteraion due to weathering


Standard Roof: Sloping roofs utilising a nominal thickness of 3/16 to 1/4 in. (4.8 to 6.4 mm). The shingles should be rectangular unless otherwise specified. In addition, the shingles shall be drilled or machine punched for two nail holes which has to be located for proper headlap.


Textural Roof Sloping roofs utilising shingles in various colours, sizes, thicknesses and textures for architectural effects. The shingles shall be drilled or machine punched for two nail holes which has to be located for proper headlap.


Graduaded Roof Sloping roofs utilising shingles with a greater range of sizes, thicknesses and exposed lengths. The slates are arranged on the roof so that the thickest and longest occur at the eaves and gradually diminish in thickness and size towards the ridges. The shingles shall be drilled or machine punched for two nail holes which has to be located for proper headlap.

fsep 写道:

在铜屋顶面前,一切都是浮云

有必要吗

我爱温哥华 写道:

fsep 写道: 在铜屋顶面前,一切都是浮云 有必要吗

基本上号称life time的材料或几十年寿命的,虚构成分大,从物理学来讲,什么水泥砖,沥青,那能坚持这么大的温差。
中国的青砖例外

真贵。值吗?

很漂亮!

前几週在西温看房,看到一处Cedar屋顶,貌似original,就询问买房经纪。对方说此房顶是非常厚实的cedar,可能比瓦顶寿命更长。