Monday, December 10, 2007

Wall Insulation

Thankfully we have plenty of storage space as the two main forms of wall insulation were delivered last week. The Rockwool Flexi 140mm batts are fairly standard, bulky, widely available and commonly used. The pavatex 'Pavatherm Plus' woodfibre board in the right of the picture is the non-standard element of our wall insulation. The latter is an insulating wood fibre board which is effective in reducing the U-value ie improving the thermal efficiency, in improving acoustic protection (not that we have any external noise problems!) and providing summer heat protection. It is used as an overcladding system for the timber frame in this application and will effectively 'block' most thermal through the frame and aid airtightness thus giving the best chance of this and the Rockwool insulation working at its best.

Today in the glorious sunshine the joiners made a start on the south gable. Also the suppliers of the Pavatherm board visited to discuss the product and its installation with the guys on site as well as Steve and I. Last winter when we were looking at specification/design issues for the house (that seems such a long long time ago!!!!!!) we had concern about it being an appropriate material in the wet West of Scotland as the insulation should be fixed dry but we were reassured by architects who had used it on self-builds in Scotland. The AECB also provided contacts through their forum which was beneficial in this sort of decision. The joiner had not used the product before but by the end of a very productive day he rated it very highly and enjoyed working with it.

On other matters the larch cladding arrived this afternoon but the timber frame manufacturer has sent the wrong profile so that will need to be replaced. Hopefully they will do this quickly. Also or architect has sent through revised details for the porch so that can go ahead now.

Slates have also arrived. The electrician and the chimney man are due tomorrow. Bathrooms and the 3 really large fixed and sliding windows are due on Wednesday. Bathrooms should have arrived last week but didn't...more chasing!

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