Mr Punter

Which is why I said

The additional volume does not cause any heat to be wasted (although the insulation over the larger sloped surface area would need to be improved to compensate). The insulated space is ideal for siting MVHR and ducting.

I really dislike meter boxes on the front of houses. They are really ugly, especially in a terrace. Also, the doors often fail and the boxes tend to break and discolour. Surely they can be improved?

It seems that the definitions vary but I believe the following are widely accepted: With flat roofing, cold roof is insulation between rafters, ventilation gap, decking and waterproofing. Warm roof is insulation above rafters. Some have decking above but strictly the waterproofing should be straight onto the insulation. With pitched roofing, cold roof has insulation at ceiling level with the loft ventilated, warm roof is insulation between the rafters (perhaps above / below as well), (sarking) membrane, vented gap and roof covering. I never hear anyone refer to 'cold loft' construction even though it is more technically correct.

Slates tend to get put into crates rather than just pallets. Stack them so they don't all leap out when you take a side off.

Egger Protect chipboard and D4 adhesive.

Looks like the drawing you posted is a verge. Is there an eaves drawing with the gutter shown?

Sorry @Russell griffiths I did not read the post too carefully and assumed you were adding an extra layer. Service void battens probably make the job a bit nicer as it makes the plasterboarding easier.

@DaveH @vivienz did this kind of thing. Not sure if it is what you are aiming for...

It is quite odd because there is not usually much wall above a window in a bungalow - just a course of blockwork then the roof overhang - unless it is a gable wall?

Doing some calcs the saving in heat loss would be 35W over the whole roof with a temperature difference of 10 degrees. Maybe you will save £15 a year on mains gas, £45 a year with full rate electricity, so between 3% and 8% or a payback of between 40 and 13 years. @Russell griffiths Are you costing in labour with your £600?

Hello Ebrahima and welcome. Did you get builders to do this for you? Maybe ask them what they were planning for the membrane. If you are not there you will need someone competent and trustworthy to oversee the work or you could waste your money and end up with a really shoddy job. As I am sure you are aware, building regulations in The Gambia are not enforced as strictly as the UK. Whereabouts are you building?

Maybe worth seeing if they would accept enhanced smoke detectors (mains linked one in each room plus corridors)

Maybe just some 40mm Celotex onto existing floor topped off with VCL and 18mm chipboard would be OK. Headroom probably not an issue if this is an understair cupboard.

You could just take the cill up and have a look.

It is very common. Very little effort goes into insulating window heads, cills and reveals.

https://www.rubberroofs.co.uk/installation

I just took delivery of a stone resin shower tray. I wonder if you could use a similar material and technique for a worktop?

Left hand looks like Siberian larch heartwood. Right hand looks like crap and not genuine. The Siberian larch I have had was all a similar (high) density. It looked fairly ginger in colour. It is slow growing and the growth rings are therefore fairly tight.

I have used EDPM on a large garage. It is cheap and fairly simple to DIY. I got it made as a single sheet but it was quite unwieldy. Joins, junctions, abutments, upstands and penetrations can be quite tricky, but I think this goes for many systems.

You can get the SE to prepare a tender package for the groundworks. If they are local they may have a few firms they will suggest. On the subject of muckaway but a bit off topic, a castle wall collapsed into the back garden of a building near me yesterday. They estimated 600 tonne of flint and chalk. It looks like it may be tricky to get at. https://www.theargus.co.uk/news/18030513.lewes-castle-wall-collapse-devastating-drone-footage-lays-bare-destruction/

Another decent week. Is this all being done on a price? Looks like it will be a high one!

£400 is robbery. Keep ringing round. Make a note of muck lorries when you are driving around. Work out how many you need. Get 20 tonne ones and load them with a large excavator as grab lorries are only good for a few loads.

Could this work using any of the standard Velux stuff? They work down to 15 degree pitch and have a wide range of module sizes and glazing options. You may need to protect them from being walked on.

Bear in mind that outward opening French doors a prone to being blown about by the wind. The handle operated friction brakes are OK good but often seem to operate only on the main leaf. Sliding, folding and tilt/turn could be alternatives. I would change the small pair of doors in the living room to a window similar dims to the one in the first floor bedroom. Btw can you request to change the upstairs bathroom door so it opens inwards as it will be a pain as drawn.