10 x Manthorpe Felt Lap Vent, Roof Loft Ventilation, Cures Loft Condensation

Easy to fit instant feel air flow. Condensation gone in couple of weeks .also recommended to work colleague with same issues. He had same results

great stuff price a bit high. for a bit of plastic. this worked very well

Easy and quick to install. Held well in place. Seems to have really improved airflow. There was a picking issue with the order which the seller was very quick to respond to and sent the missing vents to us extremely quickly. Would recommend.

Loft in extension which was boarded and strengthened slowly developed condensation which has soaked the flooring and some items stored there, despite there being vents in the soffits. Installed six of these vents and the problem was solved after two weeks. Made use of the remaining four in my original loft space and there was an immediate improvement in air flow. Will keep monitoring the situation. They are a little flimsy but are easy to fit and need care to ensure you do not split the felt . You also need to ensure that the clips engage to prevent rolling and tearing the felt edge. An economical way to reduce potential significant problems.

Practical. Good solution to damp / mould. Care has to be taken on insertion as it is easy to tear the roof felt. I have installed around 50 in a large loft. It's now dry without mould (but I had to sort out a separate water ingress issue by chimney seals). Good part of solution to prevent dy rot.

These do the job but arent particularly high tech! I noticed some condensation in my attic so wanted some more ventilation to try and stop the condensation forming. These do the job cheaply enough and are very easy to fit. You just push them between the felt joins and they let in more air from the underside of your roof tiles. Some would not push in fully as they were catching something on my roof so only sat half way in - but still I could feel the air coming in so its ok. The ones I pushed all the way in and hooked onto the felt using the built in hooks only seemed to let air in through the middle as the felt closed at the sides - so could have done with being wider and maybe thicker. Time will tell but more air (even if only slightly more) is better than none so it all helps. Overall I would recommend them as a quick fit until I sort out additional soffit vents or a gable vent.

effective in reducing condensation.

Extremely easy to install and seems to be effective