ok i think the bass coms in with somthin that sounds like 
e----------2h3-----------------------| 
b--------3---------------------------| 
g------2-----------------------------| 
D----0-------------------------------| 
A------------------------------------| 
E------------------------------------| 
           (^Guitar coms here) 
an guitar comes in on the d chord like 
(listen to the song ,cuz im not timing this very well) 
e-2----33333---2-22---33333---2-22---33333---0-00---3p22222---| 
b-3----33333---3-33---33333---3-33---33333---1-11---3-33333---| 
g-2----00000---2-22---00000---2-22---00000---0-00---2-22222---| 
D-0----00000---0-00---00000---0-00---00000---2-22---0-00000---| 
A------22222----------22222----------22222---3-33-------------| 
E------33333----------33333----------33333--------------------| 

and while peters singing its like 

e-0h2-2---33333---0h2-2---33333---0h2-2---33333---0-00---3p22222-| 
b-3---3---33333---3---3---33333---3---3---33333---1-11---3-33333-| 
g-2---2---00000---2---2---00000---2---2---00000---0-00---2-22222-| 
D-0---0---00000---0---0---00000---0---0---00000---2-22---0-00000-| 
A---------22222-----------22222-----------22222---3-33-----------| 
E---------33333-----------33333-----------33333------------------| 

preChorus: 
not exactly sure, but something like 
         Em                                 C          G 
When the winds come hard agaisnt us ,You are steadfast, You are true 
         Em                                    G           D 
When the ground beneath us trembles, Your Foundation never moves 

Chorus: 

       G               C                 G                D4 
Strong Tower ,high and glorious , Strong Tower ,mighty in Love 
    G             C               G       D4     G 
Our Refuge ,our Defender , Strong Tower , Lord above. 

end of Chorus 


or somthing like that 


and then theres a little thing sorta like 
e-------2h3----2----------------------------------------| 
b----------------3--------------------------------------| 
g----2------2------2------------------------------------| 
D-------------------------------------------------------| 
A-------------------------------------------------------| 
E-------------------------------------------------------| 

and i think thats in the verse in th background?maybe? 

then the verse again ,then the preChorus again, 
then the Chorus agian 

Bridge: 
Em7         C           D4                   Em7          C       D4    D 
You are my Shelter ,my Shield , You are the Home I could never deserve 
            Em          C          D4     D 
Here i will serve ,ever under Your gaze , 
            Em          C            D4 
Here i will serve, ever singing your praise. 

then the Chorus 2 more times 

then it ends on 
       G      D    G              G      D    G 
Strong Tower, Lord above , Strong Tower ,Lord above 

ok there it is ,hope its good ,please rate it if it is. 
o ya here the chords: 
   G     D     C     Em    D4    Em7 
e--3-----2-----0-----0-----3-----0---------------------------| 
b--3-----3-----1-----0-----3-----3---------------------------| 
g--0-----2-----0-----0-----2-----0---------------------------| 
D--0-----0-----2-----2-----0-----2---------------------------| 
A--2-----------3-----2-----------2---------------------------| 
E--3-----------3---------------------------------------------|