Our Comments On Our Thai Architect’s Proposals For Draft Preliminary Design Of Our Retirement House In Thailand
17 August 2010
Below are comments I sent to our Thai Architect in Bangkok on his Draft preliminary Design.
AB-LIST OF-MATERIAL-100817.DOC
17 August 2010
Alan and Kanyah House Pakchong
Alan’s Comments
| Ref | List of Material | Alan’s Comments 17 Aug 2010 |
| Floor Material | ||
| F1 | 1 1/4″ x 6″ hard wood on 1 1/2″ x 6 wooden joist @ 0.60 m. | 1 1/4″ seems very thick for floor planks. Floor planks to be butt joined, sanded and polish finished. |
| F2 | RC.Floor W/ Rough surface ceramic floor tiles | |
| F3 | RC.Floor W/ Rough surface and painted | |
| F4 |
|
Ground in car park area. |
| F5 |
|
Balcony. Wood must be weather resistant. |
| Wall Material | ||
| W1 | 3/4″ X 6″ Wooden plank, lap joint, on 1 1/2″ x 3″ hard wood frame @ 0.60 m. | |
| W2 | 4mm.Thk Plywood cover with bamboo mat, 1 1/2″ x 3″ hardwood frame @ 0.60 m. | When applied to external walls, W1 already has 1 1/2′ x 3″ hard wood frame @ 0.60 m so assume that only one frame is needed not 2 frames?4mm Plywood is very thin. See below comments on Membrane. |
| W3 | Brick wall covered with Ceramic wall tiles | |
| W4 | Brick wall plaster and painted covered with bamboo mat | |
| W5 | Brick wall covered with 3/4″ x 6″ Wooden plank, 1 1/2″ x 3″ hardwood frame @ 0.60 m. | |
| W6 | Cavity wall (Aerated block 7.5cm.THK / Brick) Plaster and paint | Assume this means two walls with air gap (cavity) between. Only one wall is needed – single block.Assume ‘plaster’ means cement rendering? |
| W7 | Wooden batten size 2″ x 4″ | |
| W8 | As W6 but no rendering. | Inside walls of workshop. |
| Ceiling Material | ||
| C1 | 9 mm.Thk. Gypsum board. On galvanized stud frame, plaster and paint | |
| C2 | Gypsum board [Moistblock type] thick 9 mm. on galvanized stud frame, plaster and paint | |
| C3 | Ceiling 4mm.Thk. Plywood finish with bamboo mat, 1 1/2″ x 3″ hardwood frame @ 0.60 m. | See email comments on Bamboo ceiling/roof/rafters |
| C4 | 4mm.Thk. Fiber cement board, with 5mm. gap, on galvanized stud frame, | Do not understand this. Please explain. Also see comments marked on the drawing. |
| C5 | No finish. Leave as it is. (Can see underside of floor above) | Workshop |
| Roof Material | ||
| R1 | Concrete roof beam and wooden roof structure as shown in drawing | Rafters must be partially visible. See below comments on Bamboo ceiling/roof/rafters |
| R2 | Clay tile roof | |
| R3 | 4″ Thk. Glass wool Insulation above the ceiling. | |
| R4 | Upvc gutter | Would question whether UPVC is available in large enough sizes and in what colours. If not available, use galvanized steel, painted. (See picture below) |
| R5A | Eaves, hard wood size 1″x8″ and 1″x6″ with gloss finish paint | |
| R5B | Gable end hard wood size 1″x82 | |
| R6 | Ridge’s cover cement |
Other Comments.
1. Drawings
See comments marked on drawings in the file AB-THS-PKCHNG-CMMNTS-100817-001.pdf.
If anything is not clear please ask.
2. Membrane
My concept detail drawings had a impermeable membrane between the exterior wood 9and roof tiles) and the internal Bamboo mat. This is common in Europe and USA but perhaps not in Thailand. Let me explain what it is and what it does (in case you are not familiar with this).
The membrane is sometimes made from plastic, sometimes (particularly for roofs) from ‘roofing felt’ a bituminous material.
The membrane prevents wind-driven rain from entering the building, keeps out the wind and insects. More information from the links below. Also please see attached pdf. Pitched_Roofing.pdf
http://www.hyload.co.uk/pages/hyload_homepage/the_waterproofers_handbook/default.aspx
The drawings do not show a membrane – perhaps there is a reason for this, but does show a 4mm plywood sheet which I assume supports the Bamboo mat? 4mm is very thin and would provide much support, I suppose.
How is the plywood and Bamboo mat fixed?
I would like to understand more about the proposal and why a membrane is not used before agreeing.
3. Bamboo ceiling/roof/rafters
As shown on my concept drawing Details sheet, the greater part of the rafters are visible from beneath the roof. The bamboo mat fits between the rafters. The effect is shown in the picture. This appearance is very important to us. We would rather loose some of the thermal insulation than not see the rafters. Please remember that Pakchong is not as hot as Bangkok or the central plains.
Above, our concept for the Bamboo ceiling/roof/rafters. (Note: In the picture, ‘PURLIN’ should say ‘RAFTER’.
Above, the effect we want, the rafters visible.
We want to see the rafters in all rooms except the bathroom/shower. The bathroom/shower is the only room with a flat ceiling.
4. Gutters
Above, galvanized gutter, unpainted.
UPVC is long lasting but is it available in large enough sizes and colours? In the picture above the steel is not painted. We would like the gutter coloured to match the roof. (By the way, I like to roof colour in the above picture)
Is a Gutter necessary on the roof that drains towards the Balcony roof? I think that allowing water to drain from one roof to another may not permitted under UK Regulations, but if it can be done in Thailand and it works then we can save the cost and complication of one gutter and the down pipes.
5. Gutter Down Pipe
There is no need to put the down pipes in a shaft, but they need to drop close to the house. The roofs overhang the house by 900 mm and if the down pipe drops vertically down at the end of the gutter and away from the house wall it would look ugly.
6. Gable End
I don’t understand the “4 mm Fiber cement board, with 5mm gap” on Section AA. For the underside of the roof at the overhanging ends and for the underside of the balcony roof we were expecting a wood finish because bamboo mat is not suitable for outdoor use.
7. Gable End
I don’t understand the “Wooden batten size 2″ x 4″ on the internal gable” on Section CC. This should be covered in Bamboo mat.
8. Others – Comments On Drawings
- Bath drain is directly over the concrete beam.
- The shower drain should be moved so that the horizontal drain under the slab is not visible from outside of the building. Visible in the workshop is OK.
- Prefer the folding doors to open as marked on the drawing to keep the balcony and Dining areas clear when the doors are open.
- Dividing walls between Living/bedroom and kitchen/bedroom are shown as finish 2, the same as external walls but the construction is not the same. Needs to be clarified. Is Steel Stud cheaper than wood?
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