Hi Angela,
I've been to the FBT's site and wasn't impressed when I saw pictures of previous projects. Some were okay but others showed dampness: [broken link removed]
What specifically from the above link shows dampness?
I'm a little confused given that the link is to 2 pictures of a building under construction.
During the construction stage it’s obvious that there is water lodging within the cavities of the poroton block and cannot escape. With reference to the bottom picture, the points around the house that show dampness are above the door frame, on the first row of blocks in the bottom right and also on the left hand side above the rectangular window. The dampness can easily be identified by the colour difference. Given the fact that there is water lodgement on the first row that has not yet dissipated how long will it take for the water to dry out completely?
Perhaps the top left picture in this link will make things a little more clear: [broken link removed] Here the discolouration is merging from one block to the other and is not a case of individual blocks being a different colour.
I believe it is common practise, even when using normal blocks, to protect the top layer of a wall being built from water penetration. I believe this practice should be especially applied when using Poroton blocks because of the vertical cavities.
Hi Angela,
From reading your previous posts on this thread it’s apparent that you are trying to source a system of construction that is energy efficient. As Maggie mentioned in an earlier post, Ytong may be worth considering as another method of construction. Ytong blocks have excellent thermal retention properties. They have been used in Europe for over 50 years and are now available to Irish consumers through Eco Stein Ltd. I’m affiliated with this company and thought I might give you an additional option to consider. Further information on current Irish builds and achieved U-Values can be obtained on Eco Stein’s website: [broken link removed]
Hi Sas,
Though not absolutely necessary, it would be, as mentioned by Maggie earlier, good building practice to protect any wall from water ingress during building. This is done in order to reduce drying out time prior to plastering to about 2 days for Ytong walls in favourable weather conditions.
The CE certificate you are referring to is confirming that the blocks are manufactured according to EN771- 4, which incidentally, is also an Irish standard i.e. I.S. EN771-4 issued by the National Standards Authority of Ireland (NSAI), conferring a presumption of fitness for the intended uses i.e. different types of load bearing and non load bearing applications in all forms of walling including single leaf, cavity, partitions, retaining, basement and general use below ground level including walling for fire protection, thermal insulation, sound insulation and the fabric of chimney (excluding chimney flue units). I hope that clears up your misunderstanding.
We use cookies and similar technologies for the following purposes:
Do you accept cookies and these technologies?
We use cookies and similar technologies for the following purposes:
Do you accept cookies and these technologies?