Solid Double Brick, No Cabling, and Nothing May Be Drilled: Whole-Home WiFi in a Harbour-View House (Lower North Shore)

实心双砖、没有网线，而且一个孔都不能打：海景房的全屋WiFi怎么做（下北岸）

Home · lower north shore住宅 · 下北岸Solid double brick实心双砖墙No existing cabling没有预留网线No drilling permitted不允许破墙打孔Deco meshDeco组网Dedicated wireless backhaul独立回程频段

Every home like this has the same WiFi problem, and it has nothing to do with how much the house is worth. The better built the house, the worse it is for signal: solid double brick and heavy sound insulation are close to the ideal material for blocking WiFi. Add a house old enough that no network cabling was ever run, and a finish that nobody is going to let you drill into, and the conventional answer — run a cable — is off the table before you start.

这类房子的WiFi问题都是同一个，而且和房子值多少钱没关系。房子造得越扎实，信号越糟：实心双砖加上顶级隔音，几乎是屏蔽WiFi的理想材料。再加上房龄够老、当初根本没有预留网线，而现有装修又不可能让你去打孔，那么常规答案——拉一根网线——在开工前就已经出局了。

The house, and the constraint

房子的情况与限制条件

Lower north shore, with a direct outlook to the Harbour Bridge and the Opera House through a distinctive round window.
Three bedrooms, each with its own bathtub and harbour view. Coverage had to reach all of them, including the furthest.
Construction: solid double brick with heavy sound insulation. Excellent for living in, close to worst case for WiFi.
The house is old enough that no network cabling was ever run, and drilling through the existing finishes to add surface cabling was not permitted.

坐标悉尼下北岸，透过标志性的圆形取景窗可以直接看到海港大桥和歌剧院。
三间主卧，每间都带独立浴缸和海景。覆盖必须做到每一间，包括最远的那一间。
建筑结构：实心双砖加顶级隔音。住起来非常好，对WiFi来说几乎是最糟的情况。
房子年代久，当初根本没有预留网线，而且不允许为了走明线去破坏现有装修打孔。

Why the signal died between rooms信号是怎么在房间之间消失的

Main router主路由

strong / 信号强

→

Solid double brick + insulation实心双砖 + 隔音层

heavy loss / 衰减严重

Bottleneck瓶颈

→

Far bedroom最远的主卧

unusable / 基本不可用

In a home like this the router is usually fine and the walls are the problem. Solid double brick with sound insulation blocks WiFi far more than plasterboard does, which is why the living room shows full bars while a bedroom two walls away drops out. The fix is not a stronger router in the same spot — it is not putting the signal through those walls in the first place.这类房子里，路由器通常没问题，问题在墙。实心双砖加隔音层对WiFi的屏蔽远高于石膏板隔墙，这就是为什么客厅满格、隔两道墙的卧室却断连。解决办法不是在原地换一台更强的路由器，而是一开始就不要让信号硬穿这些墙。

Why a bigger router would not have worked

为什么换一台更强的路由器没用

This is the point most people get wrong, and it is an easy mistake to make.

A single router, however powerful, still has to push signal through the same walls. Adding output does not change what the brick does to it.
With no cabling and no drilling, a wired backhaul between nodes — normally the best answer — was not available.
That leaves mesh nodes that talk to each other over a dedicated backhaul band, so the link between nodes does not compete with the devices using the network.
And it makes placement the deciding factor. Nodes were positioned along the open hallway and doorways so the relay path avoids the thickest load-bearing walls rather than fighting them.

这是大多数人会想错的地方，而且很容易想错。

单台路由器再强，信号也还是要穿同样的墙。加大发射功率并不能改变砖墙对它做的事。
既没有网线、又不能打孔，那么节点之间的有线回程——通常是最优解——直接用不了。
剩下的选择是让Mesh节点之间走独立回程频段，这样节点之间的通信不会和正在用网的设备抢带宽。
于是摆位成了决定成败的因素。节点沿着开阔的走廊和门框布置，让接力路径绕开最厚的承重墙，而不是硬碰硬。

Wired vs wireless backhaul

有线回程与无线回程的取舍

Wired backhaul vs dedicated-band wireless backhaul有线回程 vs 独立频段无线回程

	Wired backhaul有线回程	Dedicated-band wireless独立频段无线回程
Needs cabling是否需要布线	Yes — ruled out here需要——本例直接出局	No不需要
Speed between nodes节点之间的速度	Best available最好	Nodes talk on their own channel, so throughput holds up节点之间走专属通道，速度不明显衰减
Shares capacity with your devices是否和你的设备抢带宽	No不会	No, when a dedicated backhaul band is used用了独立回程频段就不会
Placement matters摆位重要性	Less — the cable does the work较低——有线扛住了	Critical — nodes must avoid the thickest walls非常关键——节点必须避开最厚的承重墙
Fits this house是否适合本例	No不适合	Yes适合

How it was planned and verified

方案与验收过程

How the install was planned and verified方案是怎么定下来并验收的

Walk the house and find the walls that matter走一遍全屋，找出真正挡信号的那些墙

Solid double brick + insulation实心双砖 + 隔音

Confirm no cable route and no drilling确认没有走线路径、也不允许打孔

Wired backhaul ruled out有线回程方案出局

Choose nodes with a dedicated backhaul band选择带独立回程频段的设备

Deco units chosen选用Deco系列

Place nodes along the hallway, not through walls沿走廊布点，不硬穿承重墙

Hallway relay path走廊接力路径

Walk-test roaming room to room逐个房间走动测试漫游

Video calls hold, 4K streams视频通话不断，4K流畅

Verify the furthest ensuite bedroom验收最远的那间带浴缸的主卧

Seamless handover无缝切换

If you live in an older Sydney house

如果你住的是悉尼的老房子

This is not a problem exclusive to large homes. It shows up in ordinary double-brick houses and older apartments across Sydney.

The classic symptom is full bars in the living room and no usable connection in a bedroom two walls away.
If you cannot run cable, look for mesh hardware that has a dedicated band for node-to-node traffic rather than sharing the same band your devices use.
Placement does more work than specifications. Hallways, doorways and open sight lines beat a node placed on the far side of the thickest wall in the house.
Verify by walking, not by standing still. Roaming problems only appear when you move between nodes mid-call.

这不是大房子独有的问题。悉尼很多普通双砖房和老公寓都会遇到。

典型症状是客厅满格，隔两道墙的卧室基本不能用。
如果拉不了网线，就找那种带独立回程频段的组网设备，让节点之间的通信不要和你设备用的频段挤在一起。
摆位比参数更重要。走廊、门框和开阔视线，胜过把节点放在全屋最厚那道墙的另一侧。
验收要走动着测，而不是站着测。漫游问题只有在你通话中途从一个节点走到另一个节点时才会暴露。

Result最终结果

With no cable route and no drilling allowed, whole-home coverage was built on Deco mesh nodes using a dedicated backhaul band, positioned along the hallway and doorways so the relay path avoids the thickest solid double-brick walls rather than trying to penetrate them. Walk-testing confirmed seamless roaming from the balcony through to the furthest ensuite bedroom, with video calls and 4K streaming holding without dropouts or manual switching.

在没有走线路径、也不允许打孔的前提下，全屋覆盖用带独立回程频段的Deco组网节点来实现，沿走廊和门框布点，让接力路径绕开最厚的实心双砖墙，而不是试图硬穿。走动测试确认从阳台一直到最里面那间带浴缸的主卧都能无缝漫游，视频通话与4K流媒体全程不断线、不用手动切换。