一方外墙板是多少？

100 平方英尺覆盖面积，约合 9.3 平方米。乙烯基按方报价销售，111 平方米的住宅含损耗约需 13 方。

什么是外墙板的外露高度？

每排安装后可见的高度，即板宽减去搭接量。21 厘米宽的纤维水泥板搭接 3.2 厘米，外露即为 17.8 厘米。

搭接量要留多少？

纤维水泥至少 3.2 厘米，木板至少 2.5 厘米。低于此值，风驱雨会通过毛细作用沿排缝上爬，而搭接正是为了防止这一点。

要扣除门窗吗？

扣除约一平方米以上的部分。小窗户保留在总量中，因为绕窗切割产生的废料几乎与省下的面积相当。

外墙板后面是什么构造？

自下而上搭接的防水透气膜、每处水平中断部位的泛水，以及最好用木龙骨条形成的排水空腔。外墙板是排水层，不是密封层。

外墙板计算器

估算搭接板、乙烯基或纤维水泥外墙板的覆盖面积、方数与线性长度，已扣除门窗并按外露高度计算排数。

公式与数据最后核对于 2026年8月6日 — Cosyslabs

输入

墙面总面积(ft²)

门窗面积(ft²)

外墙板类型

每排外露高度(in)

损耗百分比

每英尺或每方单价（选填）($)

Result

Coverage needed

1188 ft²

Linear feet

2037

Net wall area: 1080 ft²
Exposure: 7.00 in per course
Courses (per 10 ft wall): 18
Waste: 10%

Waste default: 10% — 普通墙面 10%；洞口、转角或山墙斜切较多时用 15%。

Diagram

Estimates only. Verify with a licensed contractor or supplier before purchasing. Rough Estimator! is not responsible for shortages, overages, or material variances. See our methodology for formulas and sources.

公式

净面积 = 毛墙面 − 洞口   ·   覆盖量 = 净面积 × (1 + 损耗)

参考资料

Measure what the tool asks for
This calculator works from 墙面总面积 in ft², 门窗面积 in ft² and 每排外露高度 in in. Measure the finished area you are covering, not the material — an estimate is only as good as the dimensions you feed it.
What it does with those numbers
净面积 = 毛墙面 − 洞口 · 覆盖量 = 净面积 × (1 + 损耗) Every figure on the page comes out of that one expression, so you can check it by hand.
Why it adds 10% waste
普通墙面 10%；洞口、转角或山墙斜切较多时用 15%。
Choosing a 外墙板类型
The 外墙板类型 changes the result, so pick the one that matches what you are actually buying rather than leaving the default.
Where the numbers come from
The constants are taken from Vinyl Siding Institute — Installation manual and IRC R703 — Exterior covering and water-resistive barriers, linked in full below. If a figure here disagrees with your supplier's spec sheet, use the spec sheet — it describes the product you are buying.
What this will not tell you
This is a material takeoff, not a bid. It does not price labour, permits, delivery, equipment hire or site preparation, and it assumes a straightforward layout. Complex cuts, difficult access and awkward shapes all cost more than the geometry suggests.

Related tools & materials

Calculators

Don't forget

防水透气膜
起始条
J 型槽
转角件
泛水板
不锈钢钉

Also useful

Astrilio Property Calculators

常见问题

量出每面墙的面积相加，扣除 1 平方米以上的洞口，再加 10% 损耗。111 平方米墙面扣除 11 平方米洞口后约需 110 平方米。

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Cite this page

Cosyslabs. (2026). 外墙板计算器. Rough Estimator!. https://roughestimator.com/zh/siding-calculator

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