Hi Chris,
I'm taking you at your word, but I'll try to be constructive as I rip !
Is your website meant to be a brochure or part of a sales generation system ?
The website does create a good visual impression and everything seems to work well. As a brochure, i can probably find my way to the information I want. One exception: the image slide changes so slowly that it is blank on my browser for nearly half the time - my rural broadband maybe ?
As part of a sales generation system, you might approach it differently. You're a large national company dealing with many different customers (big organisations, government, small business and retail customers) and so it's hard to make your website resonate with every type of customer. But I would be trying to segment those customers and send them off to the specific page with all the content focused on their problems and needs. Then you can start to get inside their heads by talking about the problem they have and how that makes them feel. That will create the necessary trust for (more of) them to take the next step before you launch into pitching your solution.
You could also sow a few more seeds of pleasure and pain .... What are the benefits of render cleaning and pressure washing ? Why should n't I just leave things dirty ? Will my house's value fall ? Will it eventually fall down, if I don't ? What will customers think of dirty patios, renders
Next, why should anyone believe you ? If you're a national company, you must have some customers who are wiling to say you did a half decent job ! Get some testimonials for every service, preferably in video format
BTW, the paragraph about K-Rend rather spoils the national story as it's clearly North West based.
I hope you find these comments helpful.
BWs
James