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Thermawall TW53 is for external insulation and it cones in 1200x600 sheets and only has a K value of 0.025W/m2 as against Celotex of 0.022W/mK. Have mo idea of compressive strength. If it was us we would not attermpt to use it. Regards oldun

Due to the fact that we are thick, we can make no sense of your post what so ever. Are you saying that you have cut your birds mouth to deep and left your HAP low or are you saying that your secant was to short and your heel cut and seat cut does not now extend over the 45 degree cut on...

Last post really made us chuckle. If you really want to make up three trusses to support purlins then make up three TDAs, but they will cost you more then 3 fink trusses Regards oldun

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Chirpy. Pleased to see we are making you think on your own. You are putting your decimal point in the wrong place. 11.2kg/m2 is .0112 x 9.81 = 0.1098 which = 10.98kn/m2. Regards the factor of 10 we would multiply 11.2kg by 10 to give 11,2kn/m2. A few kn here or there are not making that...

A mending plate is in the name. Mending plate and is not intended for structural use which includes trusses. If you think that you can design and make your own trusses, then you are in a fantasy world. Either buy your trusses or pitch a cut roof. Regards oldun

There are four types of Ancon wind posts and half dozen types of horizontal ties. None of these are designed to be retro fitted and your SE should have known this. Wind posts are designed to be built into cavity as wall is built up. Wind brace needs to be bolted to foundation brickwork on...

Chirpy, We are never going to educate you by just keep telling you how to do it, so we are now going to make you fathom it out your self. Go back to the technical manual page 20 read and understand dead loads and live loads 1500 N/m2 = 1.5 kn/m2. .250 N/m2 = 0,25 kn/m2. Okay, so far. Now take...

Mr. London, You are going to put us to a lot of writing, however, your first post first. On a 6 metre run minimum fall is 1 in 80. 1 in 80 = 0.0125mm per metre by 6 metre = 75mm of fall Tapered firrings should only run with the joists not over joists. A fall over the joists should be formed...

Gary Received PM Suggestions. If you have laminated sheathing both sides of bressmur then we feel it will be strong enough to support the double beam coupler in position shown on drawing. Laminate and screw double beam 50mm up and 50mm with 80x6 screws at 450 centres, same other side but...

Chirpy, Suggest you wait for revised quote, as still think it will be cheaper than solid timbers. If you use solid, you have four rows of herring bone or solid noggins, binders and any possible hanging from concrete roof Also remember that Posi Joists are two thirds labour content cheaper to...

£5K will cover a domestic pumping station Google then. Plenty to choose from. Not as reliable as natural fall, but with a fitted alarm they do the job. Regards oldun

Completely different story from your first posts coming out now.. Regards vision splays, what is more important to you, knocking down part of your wall, or knocking down a small child when you exit your drive Think about it. Regards 1 in 10 fall completely agree with council not wanting a...

Nosey is right when he states a 1 in 80 min fall for a drive, but it can be stretched to 1 in 100 if workmanship is good, plus your fall depends on existing ground levels A 1 in 10 fall is much to steep for a drive way unless of course existing ground levels dictate Suggest you ignore the...

Gary In your post dated 31 July you said you have 40 3.6 50x100 In your PM dated 31 July you said you have £600 of 50x150 Please confirm what size rafters you are using? Regards oldun

Chirpy, Had a few spare minutes, so before you gert your knickers into a twist, google Ecojoist® Technical Manual.pdf - Robinson Manufacturing. Then google and find both Eco joist and Posi joist local manufacturers and ask for a quote from both for joists the overall span you require...

Truss shown on drawing is a Fan truss, although you have not drawn in the bottom chord. Fan trusses are used for longer than average roof spans.. Appears from the poor photos that there are no longitude braces or wind braces. Can not see whether there are any lateral braces to gable wall...

Quick answer 0.25kn m2 :mrgreen: Busy next couple of days, will come back to you. Regards oldun

There are several ways to achieve 28W/m2K with 215 blocks to comply with L1B, how ever all blocks must have 20mm of external render. Celcon Solar. Topblock Superbloc. Thermalite Super All have a lambda value of 0.11 W/mK and you can dot and dab with.50mm Gyproc Thermaline Super. Celcon...

Gary, We are only a few coppers apart , so briefly, a 50x150 rafter at 26 deg will have 64 deg top plumb cut 167 long. A heel cut 54 deep and HAP of 113 and seat cut of 26 deg and 110 long. True hypotenuse is 1085 plus HAP of 113 makes total rise from top of p[ate to top of ridge 1198...