SOFFIT & FASCIA: How-To Install Your Own The Right Way

根据您的挑剔程度,安装铝拱形和筋膜可能是完成项目的简单组成部分,或者沮丧地进行了令人讨厌的练习。It all depends on how you go about it. And truth be told, there are plenty of so-called professionals who won’t take the time nor trouble to install aluminum soffit and fascia the right way. Soffit is the horizontal area underneath a roof overhang, and fascia is the vertical face of the edge of a roof. Any handy DIY person can have success installing this stuff, but your experience depends on understanding the challenges involved and the steps you take to achieve the three main aluminum soffit and fascia goals.

Soffit and Fascia
Fascia is the vertical edge of a roof, and factory-finished aluminum fascia is an excellent option for this situation.

Three main soffit and fascia goals…

  1. 防止水潜入铝的后面,并导致屋顶边缘变湿和腐烂。
  2. 为铝的津贴不可阻挡习惯,以随着温度的变化而自由扩大和收缩。
  3. 保护筋膜,以应对随之而来的各种恶劣天气。

To achieve these goals on your house, garage or cottage,you’ll need to meet three challenges of working with factory-finished aluminum soffit and fascia products.


使用工厂成熟的铝拱形和筋膜涉及切割手术和动力工具的组合。Besides a good pair of aviation snips for medium-sized cuts, I use a pair of small, first-aid scissors for completing tiny cuts accurately. And you can’t beat a sliding compound mitre saw for large, repetitive cuts. The blade I prefer is made especially for soffit and fascia work, and slices more cleanly and quietly than a regular crosscut blade. For best results, also give a quick shot of WD-40 to the teeth after every few cuts, to extend blade life.

Aluminum-cutting blade in a chopsaw. Lubing the blade with WD-40 improves cutting results.

The factory-applied finish on the aluminum you’re working with will last for decades outdoors, but it’s surprisingly easy to scratch while it’s going up.And with all the metal filings that build up around the saw after just a few cuts, it’s a dangerous place, especially when you’re working with dark brown aluminum that shows scratches so clearly. You can greatly reduce the scratch hazard by installing self-sticking felt pads onto the support arms of your saw. This protects the painted finish on those occasions when soffit and fascia needs to be cut with the finish facing down. I use the kind of felt sold to protect wood floors from furniture feet.

Soffit & Fascia Challenge#2: Install J-Channel and Soffit

This phase of the work is simple, but if brick or stone veneer will be going up later, J-channel gets a little trickier.You’ll need to determine the amount of space the veneer requires, then locate the J-channel that same distance from the wall. Snap a chalk line to act as a guide, then fasten the J-channel with screws along the mark.




Aluminum nails sold for soffit and fascia work are soft and short, so it can be frustrating to drive them.我用框架指甲作为中心拳,以使指甲孔从拱腹部开始,但是我从不使用标准的铝制指甲来固定铝。



  • Rule #1 for attractive fascia installation:尽可能少,从不在金属的前面。忽略这个细节,铝在炎热的日子里变得更大的讨厌习惯会引起难看的屈曲和波浪状。当陡峭的山墙末端保持陡峭的屋顶时,这一点尤其重要。

    Stainless steel nail partially driven into over-sized hole in edge of fascia. The over-sized hole allows for expansion and contraction of aluminum.

它没有在顶部戴上钉筋膜,而是将其塞在铝滴Ed边缘下方安装在屋顶周围。这提供了沿顶部边缘的大量握持力,但是只有当该进近的指甲与沿L形筋膜轮廓的底部边缘驱动到超大的孔中时,只有在距离时。这里的诀窍是使用足够长的耐腐蚀指甲,可以牢固地延伸到屋顶框架的实木中。标准的铝制指甲很少以这种方法所需的最小1 3/4英寸长,并且定期镀锌和电镀钉的时间会与铝的时间不佳。这就是为什么2英寸长的不锈钢指甲是确保筋膜底部边缘的方法。predrill略微超大的孔与拱腹的每个第三个凹槽对齐,然后将指甲钉在钉子上,足够紧张,以占据所有的懈怠。

Soffit and fascia installed and ready to last a long time. Stainless steel nails hold much better than the traditional aluminum nails used for this application.


As with so many things in the building world, success with soffit and fascia is won in the details.Make allowances for thermal expansion, overlap joints to keep water out, and secure everything firmly against wind. Fascia is a part of your home that everyone will see, so it pays to be particular.