Thursday, October 27, 2005

Why timber frame isn't always quicker

One of the biggest questions every would-be selfbuilder has to address is whether to go brick and block or timber frame. For me, it’s something of a hoary old chestnut, having built using both methods and having been writing articles around this issue for many years. You’d think I’d have pretty set views by now but I don’t. Partly this reflects my tendency towards hopeless prevarication in all things, but it’s also undoubtedly because it’s a question with no easy answers.

However, a site visit this week to a timber frame house in Cambridgeshire gave me pause to think afresh about the issue. This was a site in a conservation area and that meant that there were some quite prescriptive design guidelines: basically it had to match up to the house next door, which was a detached vaguely-Georgian style brick house under a slate roof.

However the new house design was L-shaped, a stepped L-shape no less. What I mean by that is that it consisted of a main rectangular-shaped box (or aisle) of two storeys, with a single storey rear extension. My attempt at the relevant 3D house design is pictured here ( permitting). A common enough house layout, you’d think. And you’d be right.

The junction of the two parts of the house is what I wish to draw your attention to. It’s referred to as an abutment. However you do it, it causes problems because there are waterproofing details to be made between the wall of the main aisle and the roof of the extension. Lead flashings have to be fitted over the junction and the wall cavity has to have an effective barrier laid across it in order to drain any cavity water out onto the extension roof. If not, you risk the cavity draining directly down into the house below the junction. Messy.

The subject of cavity barriers can wait for another article. What I am driving at here is the disruptive effect this all has on the construction of a brick-clad timber framed house. On a simple rectangular-shaped house, or even a more complex one, as long as it has a single eaves level all the way around, the brick cladding is taken off the critical path and can be completed at leisure after the framers have departed. Indeed it can go on simultaneously with the roof covering and the fit out inside.

However, split the roof levels like this and the brick wall of the main aisle has to be completed before the extension roof can be covered over. Indeed, on the site I was on, space had to be left for the brickies to have access to the wall, which was being built-up off a steel beam over the opening. Not even the extension roof carpentry could be completed.

Result? Weeks had been lost waiting on the brickies. The roofers had been in and finished the main aisle but had to return for another visit to cover the extension. The scaffolding was gently racking up hire charges. The house could not be effectively waterproofed, let alone secured. All the supposed speed of construction advantages, which timber frame sells itself on, had been lost. In fact it would probably have been quicker to use brick and block on this house.

Had it been such, you would not have noticed that there was a problem here because the roof carpentry wouldn’t have started on either roof until the brickies had got to eaves level all around. And had the external skin been anything other than brick (or stone), the wall above the extension roof could have been finished off at leisure off some form of adapted scaffolding. Boarding, render on mesh, hung tiles, all fine: they are hung off the timber frame and wouldn’t disrupt the critical path. But bricks? They have to sit on something, be it a steel or a foundation: they can’t be ‘hung’ off the background timber frame and they can’t be built-up off the roof cover. So bricks have to be in place before the extension roof cover can be laid.

There’s a lesson in here somewhere. To simplify it right down to basics, despite what the salespeople say, bricks really do work best with blocks behind them. And timber frame is really seen at its best when it’s clad in something other than brick or stone.



Blogger stagg said...

We're very close to finalising a design and have got quite excited at the prospect of Hanse Haus - a german timber frame builder. However, this week I canvassed 10 lenders and, apart from the specialist lenders, I found that none of them are keen to lend on a building that doesn't have a traditional brick or block skin. Doubtless we could find a lender to support our ambition but what are the implications for resale? It seems ludicrous, given the shortage of housing in the UK, and focus on the environment, that lenders won't consider these contemporary building methods. I'm not sure I'm prepared to invest a large sum of money building something that we might struggle to re-sell in years to come.

11:42 am  
Anonymous furniture stores in orange county said...

Some contractors still prefer timber for its rigidity. Although it depends on the owner.

3:06 am  
Anonymous hand planes said...

I think a combination of blocks and timbers would be a good idea. It can perfectly create a unique and sturdy structures. Timber frames are good for other parts of the houses like the living room and even the windows.

4:47 am  
Anonymous long island home builders said...

It depends on which material is more ideal for your house. See to it that it's durable as well.

11:10 am  
Anonymous adjustable wedge inserts said...

Durability is indeed very important in creating a house. Whatever materials you are going to use, you have to ensure they'll last a lifetime.

2:26 am  
Anonymous aerospace hardware said...

I think timber is still a great material to use because it's durable and it's not that expensive.

6:54 pm  
Blogger Jade Turner said...

The implementation of several architectural house plans is one of the most difficult things in the process of building. It's indeed a tedious task. It is therefore very essential to ask a help from a an expert about the proper materials to be used in building a high quality establishment.

4:09 am  
Anonymous oil tank removal ny said...

Great article, I definitely learned a lot on using timber frames, now I know what to do.

6:42 am  
Anonymous Selena said...

I am glad to know more about timber frames on how the correct usage etc.. thanks for the great write-up.

furniture removals

2:32 pm  
Blogger andieclark said...

I think timber frames are nice but they're not as durable and fire-proof as bricks. That's why they use bricks for fireplaces making it easier for the chimney cleaners to clean the area.

6:58 am  
Blogger Unknown said...

I do believe a mixture of blocks as well as timbers is a good plan. It could possibly flawlessly develop a exclusive as well as durable buildings. Solid timber supports are usually good for other parts from the houses just like the living room and in many cases the particular house windows.Roofing edmonton

12:18 am  
Blogger Unknown said...

true religion outlet
michael kors outlet clearance
cheap beats headphones
louis vuitton outlet
kobe 8 shoes
polo ralph lauren outlet
kate spade outlet
air max 95
cheap ray ban sunglasses
rolex watches for sale
tods outlet store
longchamp le pliage
ray ban sunglasses
coach outlet
ray bans
toms wedges
ralph lauren
coach factory outlet online
coach outlet store online clearances
nike store
copy watches
true religion jeans cheap
gucci outlet online
air jordan 11
fitflop clearance
coach outlet
christian louboutin pas cher
fitflop shoes
cheap jerseys
polo ralph lauren
louis vuitton outlet stores
mont blanc pen
concords 11
michael kors handbags
toms wedges
coach factory outlet
cheap toms
michael kors handbags
air jordans

2:26 am  
Blogger Unknown said...

تخزين اثاث من المهام التى تهتم بيها افضل شركة تخزين اثاث بالرياض فى توفير اقوى الامكانيات والمستودعات التى تساعد فى الحفاظ على الاثاث

تقوم شركتنا ايضا بشراء جميع الاثاث المستعمل فهى افضل شركة شراء اثاث مستعمل بالرياض

10:54 pm  
Blogger stella said...

2:20 pm  
Blogger khairy said...

شركة كيان لنقل العفش
مدونة نقل العفش

شركة كيان من اهم شركات نقل العفش بالرياض نوفر لكم نقل اثاث بالرياض خبرة 20 عام في نقل العفش بالرياض مع اسعار رخيصة في نقل الاثاث بالرياض
شركة نقل عفش بالرياض
شركة نقل اثاث بالرياض
شركات نقل العفش بالرياض
نقل عفش بالرياض

2:45 am  

Post a Comment

<< Home