This really was a roof of two halves and it's a great demonstration of why getting Green Agenda on site for a roof treatment is a well worthwhile exercise. After a gentle treatment, this roof is well on the road to rehabilitation but it needn't have gotten to this stage to begin with.
Here's the thing - roof repairs are expensive but roof treatments are cheap. An annual treatment is some of the best money you can spend when you start comparing it to what you'll be outlaying for scaffolding, components and labour once the roof is too far gone.
Now we've cleaned up this roof, the very best plan (and what we'll be doing) is to prevent the algal growth from recurring. To do that, we'll be coming back at the same time every year to reapply the treatment. That's going to stop the algae from providing a growing medium for moss which spreads up and under the shingles, and lichen which will grow through the shingles, given enough time.
Green Agenda are roof treatment experts - call or email us anytime to arrange a site visit. We can rehabilitate heavily overgrown roofs and even better, we'll stop the problem coming back.
Green Agenda House and Building Washing and Grooming for roof treatment, house washing, pest control. 0800 647 336.