Hempcrete in action

Hempcrete in action

Martin’s done a lovely job on his Hemcrete outbuilding (now clad in chestnut shingles) as a proof of concept for his new house for which the excavations have been completed. There’s a fantastic view from his outdoor bathtub while he’s ‘camping out’ during the build!

Hempcrete in action

Hempcrete in action

If anyone would like to see Hempcrete in action, a colleague has built an outbuilding (as a trial run for a house) on the outskirts of Brighton.  Please call Martin on 07890 724634.

FREE surplus building materials

FREE surplus building materials

Coming to the end of the works and there’s a few leftover specialist building materials.  Free (or a bottle of something perhaps) to anyone collecting soon.  There’s woodfibre boards, TR27 PIR insulation, Solitex, Intello, bitumen flat roofing membrane and even some Spacetherm.   Also Foamglas and a single room heat recovery extractor from Environvent

dav

dav

VANA surf?

Apologies, never got back to you with the results of the Proclima Tescon VANA repair to my surfboard… used the board twice in heavy swells and the tape didn’t seem to notice!  The tape looked exactly the same afterwards (which I was expecting) but it’s always good to check out manufacturers claims!

VANA surf?

VANA surf?

Can Proclima’s very effective and useful Tescon VANA tape hold an ageing suf board together in the sea?  I’ll report back after the weekend!

dav

Free surplus woodfibre insulation + fixings

Surplus building materials in Brighton:

60 x 1780 x 560 Pavatherm boards (2 off) + offcuts

200mm ejots (80 off)

100mm ejots (70 off)

Mesh

Free to anyone taking in the next week. Call David on 07753 935 670

Loft + case study – insulation to walls

Loft + case study – insulation to walls

A continuous 40mm semi rigid woodfibre batt thermally isolates the timber studwork from the (external) masonry party wall to the west with further woodfibre batts between and being water vapour open (and with the lime parge) should be a long term robust solution.  The east party wall is more complicated due to the elevated risk of damp due to the neighbour’s chimney stack and the MVHR ducts so vermiculite was poured all the way down the chimney flues and continued up to insulate the wall in the loft.  vermiculite doesn’t have quite as good thermal performance but it’s ability to flow into every area was critical and should stop flanking noise travelling up the chimney flues and negating efforts made with the floors!

Loft + case study – Triple glazed sash

Loft + case study – Triple glazed sash

Today we installed the new bathroom window, and true to the retrofit mantra of doing it once and doing it right, the window is made from Accoya timber so is dimensionally stable and will last perhaps 60 years plus, the glazing is triple with krypton gas to reduce sash thickness, high performance airtight seals all round, concealed balances within the sashes (which are not visible at all) and reduce air leakage and cold bridging.  This is a window developed over 2 years for another project and should be rolled out to the retrofit market!  Manufacured by Westgate Joinery.  Period detailing to match existing windows and you really can’t tell it’s super high performance.  Beautiful installation of expanding foam airtightness to the frame.

dav

Loft + case study – steels

Loft + case study – steels

The steels supporting the new loft floor bear into the party walls and until the neighbours undertake loft conversions this will be a significant heat loss.  The beam ends have been encased in Purneit (a structural insulation left over from another job) with 10mm of Spacetherm blanket behind.  Without going to the expense of 3D thermal bridge calculations it’s impossible to determine the improvement but simple U value calculations suggest both the Spacetherm and Purenit reduce the heat loss by a factor of 3.  The black paint is Blowerproof which provides the airtightness which is especially critical here as the brickwork is thin and weak.  The second image shows where the Purenit has been routered  to seat the steel bearing plate with the Spacetherm behind

dav

dav

dav

Any recommendations for fenestration suppliers?

Can anyone recommend a supplier of inward opening aluminium clad timber windows (and ideally front and folding doors) for a low energy domestic retrofit in Brighton?

There’s so many out there, it would be good to hear about examples of companies offering excellent windows at a decent price and with good customer service…

Brighton Sustainable Building Drinks – Mar

Great meeting last night, some very interesting discussion including lots from Rafael of London Insulation on sprayed foam insulations such as Walltite and Icynene and also Warmcell.  Good to see some old faces, and was there talk of a BSB trip to see a rocket stove….?  Next meeting Tuesday 11th March from 7pm at the Battle of Trafalgar, 34 Guildford Road, BN1 3LW.  All welcome.  All welcome, but please get in touch if you fancy coming along.

Compactfoam solves ackward cold bridging

Compacfoam CF200 is a strong lightweight rigid insulation made from thermoplastic foam, based on polystyrene which can be used in a wide range of applications where structural support and the possibility of obtaining secure fixings into the material are required.  It can often be used as a replacement for timber battens for installation of fenestration and is available from GBS

Brighton Sustainable Building Drinks – August

Just a reminder that this months meeting is this coming Tuesday 13th August at 7pm, Battle of Trafalgar, 34 Guildford Road, BN1 3LW.  All welcome.  Do get in touch if you want to join the mailing list.  Should be a lively discussion as usual and this month’s topic is spray foam insulation such as Walltite.

Icynene sprayed insulation

Has anyone used Icynene sprayed insulation which the manufacturers claim is made from natural materials, water blown, airtight and vapour open?  I have a project where my client is considering it beneath a warm roof for added insulation between the joists.Icynene-Brochure