Hi there, I had a problem with condensation in my loft 2 yrs ago and got a slater (friend of the family) to install vents in the roof, now against my better judgement he insisted on fitting 4 at the back of the house as the sun shines on the front LOL! I went with his experience and not what I knew about cross ventilation. Well, last winter the problem returned and I need to get 6 more vents fitted, 3 high up and 3 low at the front, my slater agreed to do this 8 weeks! ago, I've not seen him since and I think its a matter of paying for the vents up front like the last time anyway,
I'm looking for advice on the type to get where they can be got, the four he fitted are of the mushroom type, the slates are on the small side and its quite a steep pitch.
Thanks in advance