伦敦house换新屋顶Flat Roof,三个方案,三个报价合理么?疫情期间工人真不好找

最近屋子漏雨,想维修,结果被告知,两个方案:

  1. 用Fibre Glass based paint 每套房,价格1300磅,说可以保证5-10年不漏雨

  2. 换新Flat Roof,有两个报价,具体做法是:

工人A:报价4000磅:
I only use 4mm index felt so it will be 2 layers .total 8mm .not 2mm felt wick should be 3 layers but only 6mm when done i will only use best quality not cheap s…t index felt comes with 10 years product and my labour 5 years

工人B:报价5780磅:
i use the best felt there is you will have the first layer a Breathable layer then you will have a 4 mm underlay and then a 4.5 mm top.layer and all new lead and cement work and new out let as well

请问选择哪个方案好?

没说面积啊,第三个专业,先vapour control layer + 4mm underlay 油毡+ 4.5 mm single layer system 厚油毡 30年没问题

我也不知道面积多大。。

第三个也提出用fibre glass paint,说也可以保10年,但是,换新roof可以保20年

能换就一次性换了,租客住就进去以后换起来就很麻烦了

Flat Roof 面积大概不就是你一层的面积吗 ?

fiber glass 比较轻,传统的只有最多十年,价格是fiber glass 贵,如果渗漏不严重的,可以直接上面刷漆